Rickettsiaceae
Ehrlichia ruminantium
Rickettsia
Symbiosis
Relative virulence of three isolates of Piscirickettsia salmonis for coho salmon Oncorhynchus kisutch. (1/100)
Piscirickettsia salmonis was first recognized as the cause of mortality among pen-reared coho salmon Oncorhynchus kisutch in Chile. Since the initial isolation of this intracellular Gram-negative bacterium in 1989, similar organisms have been described from several areas of the world, but the associated outbreaks were not reported to be as serious as those that occurred in Chile. To determine if this was due to differences in virulence among isolates of P. salmonis, we conducted an experiment comparing isolates from Chile, British Columbia, Canada, and Norway (LF-89, ATL-4-91 and NOR-92, respectively). For each of the isolates, 3 replicates of 30 coho salmon were injected intraperitoneally with each of 3 concentrations of the bacterium. Negative control fish were injected with MEM-10. Mortalities were collected daily for 41 d post-injection. Piscirickettsiosis was observed in fish injected with each of the 3 isolates, and for each isolate, cumulative mortality was directly related to the concentration of bacterial cells administered. The LF-89 isolate was the most virulent, with losses reaching 97% in the 3 replicates injected with 10(5.0) TCID50, 91% in the replicates injected with 10(4.0) TCID50, and 57% in the fish injected with 10(3.0) TCID50. The ATL-4-91 isolate caused losses of 92% in the 3 replicates injected with 10(5.0) TCID50, 76% in the fish injected with 10(4.0) TCID50, and 32% in those injected with 10(3.0) TCID50. The NOR-92 isolate was the least virulent, causing 41% mortality in the replicates injected with 10(4.6) TCID50. At 41 d post-injection, 6% of the fish injected with 10(3.6) TCID50 NOR-92 had died. Mortality was only 2% in the fish injected with 10(2.6) TCID50 NOR-92, which was the same as the negative control group. Because the group injected with the highest concentration (10(4.6) TCID50) of NOR-92 was still experiencing mortality at 41 d, it was held for an additional 46 d. At 87 d post-injection, the cumulative mortality in this group had reached 70%. These differences in virulence among the isolates were statistically significant (p < 0.0001), and are important for the management of affected stocks of fish. (+info)Routes of entry of Piscirickettsia salmonis in rainbow trout Oncorhynchus mykiss. (2/100)
Since 1989, Piscirickettsia salmonis, the causal agent of piscirickettsiosis, has killed millions of farmed salmonids each year in southern Chile. The portal of entry for the pathogen was investigated by use of selected experimental infections in juvenile rainbow trout (12 g). The methods used were intraperitoneal injection, subcutaneous injection, patch contact on skin, patch contact on gills, intestinal intubation and gastric intubation. Cumulative mortalities at Day 33 post-inoculation were 98, 100, 52, 24, 24, and 2%, respectively. It was shown that intact skin and gills could be penetrated by P. salmonis. The high mortality obtained in subcutaneously injected fish indicated that skin injuries could facilitate the invasion of this pathogen. Results suggested that the main entry sites are through the skin and gills and that the oral route may not be the normal method by which P. salmonis initiates infection of salmonids. (+info)Pathogenesis of liver lesions caused by experimental infection with Piscirickettsia salmonis in juvenile Atlantic salmon, Salmo salar L. (3/100)
Piscirickettsia salmonis, the etiologic agent of salmonid rickettsial septicemia (SRS), or piscirickettsiosis, causes substantial economic losses to the salmon industry. The pathogenesis of the disease has not been fully characterized. The aim of this study is to describe the hepatic lesions associated with experimental P. salmonis infection in Atlantic salmon juveniles. Fish were maintained in fresh water and inoculated intraperitoneally (IP), orally, or on the gill surface with P. salmonis. A group of uninfected fish was kept as control. Liver samples from 5 fish in each inoculated group and 3 controls were collected weekly and processed for histological and immunohistochemical examination. Thickening of the liver capsule by inflammatory cells was a characteristic histologic feature of IP inoculated fish. Three weeks post-IP inoculation, 8 fish had died and 2 fish were sampled. Histological changes at this time consisted of vasculitis, presence of fibrin thrombi, vacuolated hepatocytes and focal areas of necrosis. Leukocytes containing intracytoplasmic basophilic microorganisms were seen within hepatic sinusoids. Vasculitis and intracytoplasmic vacuoles were prominent features in fish inoculated orally and on the gill surface. The presence of P. salmonis within hepatocellular vacuoles, endothelial cells, and leucocytes was confirmed by immunohistochemistry. The intracellular location of P. salmonis and the vascular damage seen in infected fish are characteristic of rickettsial infections. Histological lesions induced by experimental infection with P. salmonis using the oral and gill surface routes were similar to those observed in natural outbreaks of piscirickettsiosis. The tropism of P. salmonis for endothelial cells explains the vascular lesions observed in SRS, whereas hepatic lesions are due to ischemic necrosis and direct injury by intracytoplasmic organisms. (+info)In vitro activity of antimicrobial agents against the endosymbiont Wolbachia pipientis. (4/100)
Arthropod-transmitted (filarial) nematodes are important causes of disease in humans in tropical countries, yet no safe drug appropriate for mass delivery kills the adult worms. However, most filarial nematodes contain rickettsia-like bacteria of the genus Wolbachia, and related bacteria also occur in insects. There is increasing evidence that these bacteria have significant functions in the biology of filarial nematodes. They are thus important targets in the search for antifilarial drugs and experiments in animals and humans have suggested that antibiotic therapy has potential in treating filarial infections. To optimize future clinical trials there is a need for a fast and simple in vitro drug screen to compare drug efficacies against Wolbachia. In the absence of Wolbachia-infected nematode cell lines, we have utilized an Aedes albopictus insect cell line, naturally infected with Wolbachia, to test the activity of antimicrobial agents. Of the five antibiotics tested, doxycycline, oxytetracycline and rifampicin showed good activity (MICs of 0.0625, 4 and 0.0625 mg/L, respectively) whereas ciprofloxacin and penicillin were shown to have no effect. (+info)Platelet kinetics in canine ehrlichiosis: evidence for increased platelet destruction as the cause of thrombocytopenia. (5/100)
A significant (P < 0.025) increase in the mean platelet diameter occurred in five Ehrlichia canis-infected dogs when platelet numbers decreased to 100,000/mul or less. Maximal incorporation of [(75)Se]selenomethionine into platelets of six uninfected dogs was 0.080 +/- 0.019% (mean +/- standard error) and occurred 5 to 6 days after dosage, whereas maximal incorporation was 0.036 +/- 0.004% within 2 to 3 days after dosage in seven chronically infected dogs that had thrombocytopenia. Analysis of the [(75)Se]selenomethionine curves yielded a platelet lifespan of 9 days in uninfected dogs versus 4 days in chronically infected dogs. Thus, megakaryocyte maturation and/or platelet release occurred at an accelerated rate in infected dogs, whereas increased destruction of newly produced labeled platelets diminished their number of peripheral blood. [(51)Cr]sodium chromate-labeled platelet survival was exponential, with a half-life of approximately 1 day in two dogs at 2 to 4 days postinfection and three chronically infected dogs. Platelet survival time was 8 days and rectilinear in four uninfected dogs. Platelet recovery was 39.43 +/- 2.86% in infected dogs as compared with 68.2 +/- 10.72% in uninfected dogs. Whole-body scans of one dog prior to and 7 days after infection showed that labeled platelets were destroyed primarily in the spleen. It is concluded that the thrombocytopenia in E. canis-infected dogs is the result of increased platelet destruction which begins within a few days after infection. (+info)Molecular analysis of Neorickettsia risticii in adult aquatic insects in Pennsylvania, in horses infected by ingestion of insects, and isolated in cell culture. (6/100)
Upon ingestion of adult aquatic insects, horses developed clinical signs of Potomac horse fever, and Neorickettsia risticii was isolated from the blood. 16S rRNA and 51-kDa antigen gene sequences from blood, isolates, and caddis flies fed to the horses were identical, proving oral transmission of N. risticii from caddis flies to horses. (+info)The effect of Wolbachia-induced cytoplasmic incompatibility on host population size in natural and manipulated systems. (7/100)
Obligate, intracellular bacteria of the genus Wolbachia often behave as reproductive parasites by manipulating host reproduction to enhance their vertical transmission. One of these reproductive manipulations, cytoplasmic incompatibility, causes a reduction in egg-hatch rate in crosses between individuals with differing infections. Applied strategies based upon cytoplasmic incompatibility have been proposed for both the suppression and replacement of host populations. As Wolbachia infections occur within a broad range of invertebrates, these strategies are potentially applicable to a variety of medically and economically important insects. Here, we examine the interaction between Wolbachia infection frequency and host population size. We use a model to describe natural invasions of Wolbachia infections, artificial releases of infected hosts and releases of sterile males, as part of a traditional sterile insect technique programme. Model simulations demonstrate the importance of understanding the reproductive rate and intraspecific competition type of the targeted population, showing that releases of sterile or incompatible individuals may cause an undesired increase in the adult number. In addition, the model suggests a novel applied strategy that employs Wolbachia infections to suppress host populations. Releases of Wolbachia-infected hosts can be used to sustain artificially an unstable coexistence of multiple incompatible infections within a host population, allowing the host population size to be reduced, maintained at low levels, or eliminated. (+info)Rickettsialpox in North Carolina: a case report. (8/100)
We report a case of rickettsialpox from North Carolina confirmed by serologic testing. To our knowledge, this case is the first to be reported from this region of the United States. Including rickettsialpox in the evaluation of patients with eschars or vesicular rashes is likely to extend the recognized geographic distribution of Rickettsia akari, the etiologic agent of this disease. (+info)Rickettsiaceae is a family of Gram-negative, obligate intracellular bacteria that includes several genera, such as Rickettsia and Orientia, which are primarily transmitted to humans through arthropod vectors and can cause various life-threatening diseases, like Rocky Mountain spotted fever and typhus.
Rickettsiaceae is a family of Gram-negative, obligate intracellular bacteria that are primarily parasitic in arthropods and mammals. They are the causative agents of several important human diseases, including typhus fever, Rocky Mountain spotted fever, and rickettsialpox. These bacteria are typically transmitted to humans through the bites of infected arthropods such as ticks, fleas, or lice.
The bacteria in Rickettsiaceae are small, non-motile, and have a unique bipolar appearance with tapered ends. They can only replicate inside host cells, where they manipulate the host cell's machinery to create a protective niche for themselves. This makes them difficult to culture and study outside of their hosts.
Rickettsiaceae bacteria are divided into several genera based on their genetic and antigenic characteristics, including Rickettsia, Orientia, and Coxiella. Each genus contains several species that can cause different diseases in humans. For example, Rickettsia rickettsii is the causative agent of Rocky Mountain spotted fever, while Rickettsia prowazekii causes epidemic typhus.
Overall, Rickettsiaceae bacteria are important pathogens that can cause serious and sometimes fatal diseases in humans. Prompt diagnosis and treatment with appropriate antibiotics is essential for a successful outcome.
Rickettsiaceae Infections are a group of diseases caused by various obligate intracellular bacterial pathogens of the family Rickettsiaceae, transmitted to humans through arthropod vectors such as ticks, fleas, and lice, resulting in a wide spectrum of clinical manifestations ranging from mild flu-like symptoms to severe potentially fatal illnesses like Rocky Mountain spotted fever and typhus.
Rickettsiaceae is a family of Gram-negative, aerobic, intracellular bacteria that includes several important human pathogens. Rickettsiaceae infections are diseases caused by these bacteria, which include:
1. Rocky Mountain Spotted Fever (RMSF): Caused by Rickettsia rickettsii and transmitted to humans through the bite of infected ticks. The disease is characterized by fever, headache, muscle pain, and a rash that spreads from the wrists and ankles to the trunk.
2. Epidemic Typhus: Caused by Rickettsia prowazekii and transmitted to humans through the feces of infected lice. The disease is characterized by fever, headache, muscle pain, and a rash that starts on the chest and spreads to the rest of the body.
3. Murine Typhus: Caused by Rickettsia typhi and transmitted to humans through the feces of infected fleas. The disease is characterized by fever, headache, muscle pain, and a rash that starts on the trunk and spreads to the limbs.
4. Scrub Typhus: Caused by Orientia tsutsugamushi and transmitted to humans through the bite of infected chiggers. The disease is characterized by fever, headache, muscle pain, and a rash that starts on the trunk and spreads to the limbs.
5. Rickettsialpox: Caused by Rickettsia akari and transmitted to humans through the bite of infected mites. The disease is characterized by fever, headache, muscle pain, and a rash that starts as papules and becomes vesicular.
These infections are treated with antibiotics such as doxycycline or chloramphenicol. Early diagnosis and treatment are crucial to prevent severe complications and death.
'Ehrlichia ruminantium' is a gram-negative, intracellular bacterium that causes heartwater disease in ruminants, transmitted primarily by ticks of the genus Amblyomma.
'Ehrlichia ruminantium' is a gram-negative, intracellular bacterium that belongs to the family Anaplasmataceae. It is the etiological agent of heartwater, a tick-borne disease that affects mainly ruminants such as cattle, sheep, and goats. The bacteria infect endothelial cells in various organs, including the brain and heart, causing vasculitis, edema, and hemorrhage, which can lead to severe clinical signs and death in infected animals.
The bacterium is transmitted through the bite of infected ticks, mainly from the genus Amblyomma. The disease is endemic in many tropical and subtropical regions of the world, including Africa, the Caribbean, and South America. Heartwater is a major constraint to livestock production in affected areas, causing significant economic losses to farmers and pastoralists.
Prevention and control measures for heartwater include the use of acaricides to control tick infestations, vaccination of susceptible animals, and quarantine measures to prevent the introduction of infected animals into disease-free areas.
'Rickettsia' are gram-negative, obligate intracellular bacteria that can cause various life-threatening diseases, such as Rocky Mountain spotted fever and typhus, which are transmitted to humans primarily through the bites of infected ticks, fleas, or lice.
Rickettsia is a genus of Gram-negative, aerobic, rod-shaped bacteria that are obligate intracellular parasites. They are the etiologic agents of several important human diseases, including Rocky Mountain spotted fever, typhus fever, and scrub typhus. Rickettsia are transmitted to humans through the bites of infected arthropods, such as ticks, fleas, and lice. Once inside a host cell, Rickettsia manipulate the host cell's cytoskeleton and membrane-trafficking machinery to gain entry and replicate within the host cell's cytoplasm. They can cause significant damage to the endothelial cells that line blood vessels, leading to vasculitis, tissue necrosis, and potentially fatal outcomes if not promptly diagnosed and treated with appropriate antibiotics.
Symbiosis is a type of close and prolonged biological interaction between two different species, often to the advantage of both organisms, such as in mutualism, but sometimes only for one (commensalism) or even to the detriment of one (parasitism).
In the context of medicine and biology, symbiosis is a type of close and long-term biological interaction between two different biological organisms. Generally, one organism, called the symbiont, lives inside or on another organism, called the host. This interaction can be mutually beneficial (mutualistic), harmful to the host organism (parasitic), or have no effect on either organism (commensal).
Examples of mutualistic symbiotic relationships in humans include the bacteria that live in our gut and help us digest food, as well as the algae that live inside corals and provide them with nutrients. Parasitic symbioses, on the other hand, involve organisms like viruses or parasitic worms that live inside a host and cause harm to it.
It's worth noting that while the term "symbiosis" is often used in popular culture to refer to any close relationship between two organisms, in scientific contexts it has a more specific meaning related to long-term biological interactions.
Phylogeny is the scientific study and hypothesis construction of evolutionary relationships among groups or species of organisms, often represented in a branching diagram called a phylogenetic tree.
Phylogeny is the evolutionary history and relationship among biological entities, such as species or genes, based on their shared characteristics. In other words, it refers to the branching pattern of evolution that shows how various organisms have descended from a common ancestor over time. Phylogenetic analysis involves constructing a tree-like diagram called a phylogenetic tree, which depicts the inferred evolutionary relationships among organisms or genes based on molecular sequence data or other types of characters. This information is crucial for understanding the diversity and distribution of life on Earth, as well as for studying the emergence and spread of diseases.
16S ribosomal RNA (rRNA) is a component of the 30S subunit of the prokaryotic ribosome, which contains conserved and variable regions used as phylogenetic markers to identify and classify bacterial species.
Ribosomal RNA (rRNA) is a type of RNA that combines with proteins to form ribosomes, which are complex structures inside cells where protein synthesis occurs. The "16S" refers to the sedimentation coefficient of the rRNA molecule, which is a measure of its size and shape. In particular, 16S rRNA is a component of the smaller subunit of the prokaryotic ribosome (found in bacteria and archaea), and is often used as a molecular marker for identifying and classifying these organisms due to its relative stability and conservation among species. The sequence of 16S rRNA can be compared across different species to determine their evolutionary relationships and taxonomic positions.
Howard Taylor Ricketts
The namesake of the Rickettsiaceae family". Microbes and Infection. 13 (1): 10-13. doi:10.1016/j.micinf.2010.09.008. PMID ... Howard Taylor Ricketts (February 9, 1871 - May 3, 1910) was an American pathologist after whom the family Rickettsiaceae and ...
Rickettsiaceae
... thus is adapted to obligate intracellular infection. Rickettsia rickettsii is considered the prototypical infectious organism ... The Rickettsiaceae are a family of bacteria. The genus Rickettsia is the most prominent genus within the family. The bacteria ... which are uniquely found in members of the family Rickettsiaceae and serve as molecular markers for this family. In addition, ... and a one-amino-acid deletion in exonuclease VII protein that are specific for the Rickettsiaceae species have been identified ...
Rickettsia helvetica
infections: a review. Expert Rev Anti Infect Ther 2012; 10:1425-1437 (Articles with short description, Short description ... matches Wikidata, Articles with 'species' microformats, Zoonoses, Rickettsiaceae, Bacteria described in 1993). ... In 80 healthy Swedish blood donors, about 1% were seroreactive for Rickettsia spp., interpreted as past infection. In a ... Walker, D. H. (2007). "Rickettsiae and Rickettsial Infections: The Current State of Knowledge". Clinical Infectious Diseases. ...
Piscirickettsia salmonis
Infection rates are highest during the outgrowing phase of the farmed salmon life cycle, when salmon are kept in seawater and ... when it was identified as the causative agent of the disease and classified as a member of the family Rickettsiaceae before it ... P. salmonis infections appear to be systematic. White or yellow lesions or ulcers, ranging from 1mm to 2cm in diameter, are ... The parasitic isopod Ceratothoa gaudichaudii is a host for P. salmonis and may represent an important vector of infection in ...
Rickettsia heilongjiangensis
Clinical Microbiology and Infection. 15: 288-289. doi:10.1111/j.1469-0691.2008.02239.x. ISSN 1198-743X. PMID 19438658. Zhang, L ... Rickettsiaceae, Bacteria described in 2003, All stub articles, Alphaproteobacteria stubs). ... Clinical Microbiology and Infection. 15: 338-339. doi:10.1111/j.1469-0691.2008.02266.x. ISSN 1198-743X. PMID 19438614. " ...
Orientia tsutsugamushi
There is no vaccine for the infection. The earliest record of O. tsutsugamushi infection was in the 3rd century (313 C.E.) in ... is a mite-borne bacterium belonging to the family Rickettsiaceae and is responsible for a disease called scrub typhus in humans ... The age group of 60-69 years is at highest risk of infection. Higher infection (57.3%) is seen in females compared to males ( ... However, uninfected mites can acquire the infection from infected rodents. In rodent and human infections, Leptotrombidium ...
List of MeSH codes (C01)
... rickettsiaceae infections MeSH C01.252.400.780.600 - pneumonia, rickettsial MeSH C01.252.400.780.790 - rickettsia infections ... bacteroides infections MeSH C01.252.400.126 - bartonellaceae infections MeSH C01.252.400.126.100 - bartonella infections MeSH ... moraxellaceae infections MeSH C01.252.400.560.022 - acinetobacter infections MeSH C01.252.400.610 - mycoplasmatales infections ... salmonella infections, animal MeSH C01.252.400.310.821.873 - typhoid fever MeSH C01.252.400.310.850 - serratia infections MeSH ...
Biological warfare
... and thus rarely if ever causes secondary infections. A pulmonary anthrax infection starts with ordinary influenza-like symptoms ... some of the Rickettsiaceae (especially Rickettsia prowazekii and Rickettsia rickettsii), Shigella spp., Vibrio cholerae, and ... Barras V, Greub G (June 2014). "History of biological warfare and bioterrorism". Clinical Microbiology and Infection. 20 (6): ... Barras V, Greub G (June 2014). "History of biological warfare and bioterrorism". Clinical Microbiology and Infection. 20 (6): ...
Ehrlichia ruminantium
There are reports of zoonotic infections of humans by E. ruminantium, similar to other Ehrlichia species, such as those that ... November 2001). "Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: ... Peter TF, Burridge MJ, Mahan SM (May 2002). "Ehrlichia ruminantium infection (heartwater) in wild animals". Trends in ... Pfukenyi, Davies M.; Mukaratirwa, Samson (2018-10-18). "Amphistome infections in domestic and wild ruminants in East and ...
Rickettsia australis
Frontiers in Cellular and Infection Microbiology. 9: 3. doi:10.3389/fcimb.2019.00003. ISSN 2235-2988. PMC 6360175. PMID ... Rickettsiaceae). ... "Spotted Fever Group Rickettsial Infections in Australia". ... "Clinical Manifestations and Outcomes of Rickettsia australis Infection: A 15-Year Retrospective Study of Hospitalized Patients ...
Scrub typhus
1996). "Scrub typhus infections poorly responsive to antibiotics in northern Thailand". Lancet. 348 (9020): 86-89. doi:10.1016/ ... Pham XD, Otsuka Y, Suzuki H, Takaoka H (2001). "Detection of Orientia tsutsugamushi (Rickettsiales: Rickettsiaceae) in ... February 2006). "Rickettsial infections and fever, Vientiane, Laos". Emerging Infect. Dis. 12 (2): 256-62. doi:10.3201/ ... 2003). "Efficacy of azithromycin for treatment of mild scrub-typhus infections in South Korea". Abstr Intersci Conf Antimicrob ...
Ehrlichia ewingii
Ehrlichia infection in deer (Articles with short description, Short description matches Wikidata, All articles with vague or ... "Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: unification of some ... Ehrlichia ewingii is a human pathogen which results in a serious infection if not treated in a timely manner. Ehrlichiosis, the ... on June 18, 1987 using a canine diagnosed with granulocytic ehrlichiosis: an infection of the granulocytes by a member of the ...
Rickettsia felis
Human infection usually results from flea feces coming into contact with scratched or broken skin. More recently, some ... Articles with short description, Short description matches Wikidata, Articles with 'species' microformats, Rickettsiaceae, Cat ... Human cases of Rickettsia felis were diagnosed in Australia in 2009, these were the first reported human infections in ... should be tested for Rickettsia felis infection. They see as very real, the possibility that Rickettsia felis might be the next ...
Atypical bacteria
Macrolides such as erythromycin however, are usually effective in treating atypical bacterial infections. Finally, some of ... the Spirochetes and Rickettsiaceae are also often considered atypical. Gram-positive bacteria have a thick peptidoglycan layer ... "Spectrum of Viruses and Atypical Bacteria in Intercontinental Air Travelers with Symptoms of Acute Respiratory Infection". ...
Anaplasma bovis
Infection is characterized by invasion of the organism into white blood cells called monocytes. Infection with A. bovis in ... 2001). "Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: unification of ... In the summer, cattle and sheep have greater infections, compared to goats having greater infections in autumn. Further, it was ... although clinical infections can be treated with tetracyclines. This organism has a global distribution, with infections noted ...
Mite
ISBN 978-1-4831-8286-5. Harrison S, Knott H, Bergfeld WF (2009). "Infections of the Scalp". In Hall JC, Hall BJ (eds.). Skin ... Pham XD, Otsuka Y, Suzuki H, Takaoka H (March 2001). "Detection of Orientia tsutsugamushi (Rickettsiales: rickettsiaceae) in ... and tinea infections". Pediatric Clinics of North America. 56 (6): 1421-1440. doi:10.1016/j.pcl.2009.09.002. PMID 19962029. ... Infections: Diagnosis and Treatment. Cambridge University Press. p. 260. ISBN 978-0-521-89729-7. Ho CC (2008). "Mite Pests of ...
Anaplasma phagocytophilum
Cattle infections had been suspected but were only first confirmed by Nieder et al. 2012. A. phagocytophilum causes human ... 2001). "Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: unification of ... During the last stage of the infection, a group of small bacteria was seen within the neutrophils in the blood. Other symptoms ... Brown, Wendy C.; Barbet, Anthony F. (2016-02-15). "Persistent Infections and Immunity in Ruminants to Arthropod-Borne Bacteria ...
Orientia
... is a genus of bacteria in family Rickettsiaceae. They are obligate intracellular, gram-negative bacteria found in ... on rodents from Chiloé Island and molecular evidence of infection with Orientia species". PLOS Neglected Tropical Diseases. 14 ...
Rickettsia
Surprisingly, the other infection reported to be likely to provide the same effect (decrease in viral load) is the virus-caused ... Rickettsiaceae, Bacteriology, Bacteria genera, Pathogenic bacteria). ... Peach phony RLO Papaya Bunchy Top Disease Infection occurs in nonhuman mammals; for example, species of Rickettsia have been ... Kannangara S, DeSimone JA, Pomerantz RJ (September 2005). "Attenuation of HIV-1 infection by other microbial agents". The ...
Paramecium biaurelia
Barhey, K.; Gibson, I. (1984). "A study on the conditions for infection of Holospora caryophila, a macronuclear symbiont of ... which are members of the family Rickettsiaceae, and (Candidatus) Fokinia cryptica, which belongs to the family Midichloriaceae ...
Rickettsia prowazekii
However, R. prowazekii can establish a latent infection, which can reactivate after years or decades (referred to as Brill- ... Rickettsiaceae, Zoonoses, Epidemic typhus, Bacteria described in 1916). ... Immunity following recovery from infection with, or by immunization against, R. prowazekii is lifelong in most cases. ...
Rickettsia peacockii
The organism is passed transstadially and transovarially, and infections are localized in ovarial tissues.[citation needed] ... Rickettsiaceae, Bacteria described in 1997, All stub articles, Alphaproteobacteria stubs). ...
Mitochondrion
Mitochondrial ATP production is also vital for cell division and differentiation in infection in addition to basic functions in ... Emelyanov VV (February 2001). "Rickettsiaceae, rickettsia-like endosymbionts, and the origin of mitochondria". Bioscience ... McCutcheon JP (October 2021). "The Genomics and Cell Biology of Host-Beneficial Intracellular Infections". Annual Review of ... PI3K activation drives mitochondrial transfer from stromal cells to hematopoietic stem cells in response to infection". ...
Rickettsia akari
... an investigation was performed to identify the source of the infections. The incinerators in the buildings were not operated on ... Rickettsiaceae). ...
Rickettsia rickettsii
Patients with severe infections may require hospitalization. They may become thrombocytopenic, hyponatremic, experience ... Rickettsiaceae, Zoonoses, Gram-negative bacteria, Bacteria described in 1922). ... the female tick can transmit the infection to her offspring, in a process known as transovarian passage. Due to its confinement ...
Wolbachia
This effect is not seen in DNA virus infection and in some cases Wolbachia infection has been associated or shown to increase ... November 2001). "Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: ... Wolbachia infection can also increase mosquito resistance to malaria, as shown in Anopheles stephensi where the wAlbB strain of ... These bacteria can infect many different types of organs, but are most notable for the infections of the testes and ovaries of ...
Rickettsia parkeri
The first report of a confirmed human case of infection with R. parkeri was published in 2004. The person was infected in the ... Rickettsiaceae, Zoonoses). ... Terms used to describe human infection with R. parkeri include ... Other confirmed or probable human cases have been reported to have acquired infection elsewhere in the United States (e.g., ... A 2021 systematic review of 32 confirmed and 45 probable cases of human infection with R. parkeri determined that 94% of the ...
Rickettsia typhi
Humans acquire infection by inhalation or by self-inoculating infected fleas or flea feces into skin when they visit disease- ... Articles with short description, Short description matches Wikidata, Articles with 'species' microformats, Rickettsiaceae). ... Murine typhus infections in the present are more sporadic and infrequent, with fewer than 100 cases reported in the US annually ... Schriefer, M E; Sacci, J B; Dumler, J S; Bullen, M G; Azad, A F (1994). "Identification of a novel rickettsial infection in a ...
United States Air Force School of Aerospace Medicine
Wolf, Stephen P.; Reeves, Will K. (2012-01-01). "Rickettsia felis (Rickettsiales: Rickettsiaceae) Discovered in Cat Fleas ( ... bone infections, anemia, radiation-induced tissue necrosis, compromised skin grafts, thermal burns and destructive soft tissue ... infections. One of hyperbaric medicine's greatest breakthroughs was made at Brooks AFB by Air Force nurse (Capt.) Michaela ...
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Rickettsial Infection: Background, Pathophysiology, Etiology
The genus Rickettsia is included in the bacterial tribe Rickettsiae, family Rickettsiaceae, and order Rickettsiales. ... encoded search term (Rickettsial Infection) and Rickettsial Infection What to Read Next on Medscape ... Rickettsial Infection. Updated: Nov 22, 2021 * Author: Mobeen H Rathore, MD, CPE, FAAP, FIDSA; Chief Editor: Russell W Steele, ... Rickettsia parkeri infection and other spotted fevers in the United States. N Eng J Med. 2005. 353:626-7. [QxMD MEDLINE Link]. ...
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Molecular identification of native Wolbachia pipientis in Anopheles minimus in a low-malaria transmission area of Umphang...
An initial survey for Wolbachia (Rickettsiales: Rickettsiaceae) infections in selected California mosquitoes (Diptera: ... natural Wolbachia infection potentially blocks malaria transmission from vector to human [25]. Furthermore, infection by the ... implying the possibility of Wolbachia infection in nonreproductive organs [22, 29]. Collectively, Wolbachia infection in ... implying the possibility of Wolbachia infection in nonreproductive organs [22, 29]. Collectively, Wolbachia infection in ...
DeCS
a tribe: do not confuse with RICKETTSIACEAE, a family; infection: coord IM with RICKETTSIACEAE INFECTIONS (IM). ... A tribe of gram-negative bacteria of the family RICKETTSIACEAE whose organisms are found in arthropods and are pathogenic for ... A tribe of gram-negative bacteria of the family RICKETTSIACEAE whose organisms are found in arthropods and are pathogenic for ... Tribu de bacterias gramnegativas de la familia RICKETTSIACEAE cuyos miembros se encuentran en artrópodos y son patógenos para ...
Rickettsia Infections - Ontology Browser - Rat Genome Database
Pesquisa | Portal Regional da BVS
Dynamics of Infections in Cattle and Rhipicephalus microplus: A Preliminary Study. Piloto-Sardiñas, Elianne; Foucault-Simonin, ... Our study confirmed significant impact of biotope type on prevalence of representatives of Borreliaceae and Rickettsiaceae ... The gut microbiota has a major role in shaping honey bees tolerance and resistance to parasite infestation and viral infection ... The most common co-infection detected in D. reticulatus was Rickettsia spp. + FLE, while Borreliaceae + R. helvetica was the ...
View of Natural Anaplasma phagocytophilum infection in ticks from a forest area of Selenge province, Mongolia | Western...
Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: unification of some ... 8 Infection in female Ixodes persulcatus ticks was higher than in males. Anaplasma platys infection in Ixodes persulcatus ticks ... Natural Anaplasma phagocytophilum infection in ticks from a forest area of Selenge province, Mongolia Brief Report Javkhlan G,a ... Discrepant infection of Anaplasma phagocytophilum in ticks has been observed around the world. In this study, both Anaplasma ...
Sp110 transcription is induced and required by Anaplasma phagocytophilumfor infection of human promyelocytic cells | BMC...
72 and 96 hours post-infection. The effect of Sp110 expression on A. phagocytophilum infection was determined by RNA ... In this research, we hypothesized that Sp110 may be involved in the infection of human promyelocytic HL-60 cells with A. ... While Sp110 mRNA levels increased concurrently with A. phagocytophilum infections in HL-60 cells, the silencing of Sp110 ... These results demonstrated that Sp110 expression is required for A. phagocytophilum infection and multiplication in HL-60 cells ...
The first report of two Ornithodoros tick species, the main vectors of relapsing fever from North of Iran, and a review of the...
Rickettsial meningoencephalitis-rising c | Biomedical Research
Rickettsiae and rickettsial infections: The current state of knowledge. Clin Infect Dis 2007; 45 Suppl 1: S39-44. [Crossref][ ... or mite-borne illnesses caused by obligate intracellular cocco-bacilli belong to the family of Rickettsiaceae [1]. Organism was ... Rathi N, Rathi A. Rickettsial infections: Indian perspective. Indian Pediatr 2010; 47: 157-164. [Crossref][Google Scholar][ ... It has been observed that the rural population appears to be more susceptible to rickettsial infections [9]. We found that ...
Summary of Notifiable Diseases, United States, 1994
... pediatric infection with the human immunodeficiency virus, invasive group A streptococcal infections, streptococcal toxic-shock ... Rickettsiaceae: the rickettsiae. In: Laboratory diagnosis of infectious diseases: principles and practice. Vol II. Viral, ... genital infections), coccidioidomycosis (for regional surveillance), cryptosporidiosis, hantavirus infection, (post-diarrheal) ... Infections infections coli O157:H7 Gonorrhea inguinale invasive (leprosy ...
PRIME PubMed | Identification of trombiculid mites (Acari: Trombiculidae) on rodents from Chiloé Island and molecular evidence...
... on rodents from Chiloé Island and molecular evidence of infection with Orientia species. Download Prime PubMed App to iPhone, ... Identification of trombiculid mites (Acari: Trombiculidae) on rodents from Chiloé Island and molecular evidence of infection ... of Trombiculid Chigger Mites Collected on Rodents from Southern Vietnam and Molecular Detection of Rickettsiaceae Pathogen. ... "Identification of Trombiculid Mites (Acari: Trombiculidae) On Rodents From Chiloé Island and Molecular Evidence of Infection ...
A lifelong study of a pack Rhodesian ridgeback dogs reveals subclinical and clinical tick-borne Anaplasma phagocytophilum...
The ongoing presence of specific antibodies and Anaplasma DNA in one dog indicates one year of persisting infection. Treatment ... This dataset essentially presents as a prospective study enabling the association of the Anaplasma infections with occurring ... may elucidate the relationship between infection and disease. In this regard, six related Rhodesian Ridgeback dogs living as a ... and two of them developed particular clinical symptoms that could be associated with Anaplasma infections over time. More ...
Anaplasmataceae Infections | Profiles RNS
Piscirickettsiaceae Infections. *Pseudomonas Infections. *Q Fever. *Rat-Bite Fever. *Rickettsiaceae Infections. *Tick-Borne ... "Anaplasmataceae Infections" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH ( ... This graph shows the total number of publications written about "Anaplasmataceae Infections" by people in this website by year ... Below are the most recent publications written about "Anaplasmataceae Infections" by people in Profiles. ...
Cytophagaceae Infections | Profiles RNS
Piscirickettsiaceae Infections. *Pseudomonas Infections. *Q Fever. *Rat-Bite Fever. *Rickettsiaceae Infections. *Tick-Borne ... "Cytophagaceae Infections" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... This graph shows the total number of publications written about "Cytophagaceae Infections" by people in UAMS Profiles by year, ... Below are the most recent publications written about "Cytophagaceae Infections" by people in Profiles over the past ten years. ...
Gram-Negative Bacterial Infections | Profiles RNS
Piscirickettsiaceae Infections. *Pseudomonas Infections. *Q Fever. *Rat-Bite Fever. *Rickettsiaceae Infections. *Tick-Borne ... "Gram-Negative Bacterial Infections" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH ... Infections caused by bacteria that show up as pink (negative) when treated by the gram-staining method. ... A case of infection-associated antiproteinase-3-negative cytoplasmic antineutrophil cytoplasmic antibody pauci-immune focal ...
CDC Science Clips
Additionally, a 0.9% infection prevalence of R. parkeri was identified in A. americanum collected in South Carolina. A 1.9% ... This study sought to identify rickettsial agents (Rickettsiales: Anaplasmataceae and Rickettsiaceae) in ticks collected from S ... infection prevalence in A. americanum of 2.7% and 2.9% in Florida and South Carolina, respectively. A Rickettsia parkeri ... infection prevalence was documented in collected A. americanum in South Carolina. Further studies are warranted to better ...
Cytomegalovirus Disease | Encyclopedia.com
... disease is a virus infection. It is caused by herpes virus type 5, and it takes two forms. Source for information on ... infections are a collection of diseases caused by bacteria from the Rickettsiaceae family. for searching the Internet an… ... Infection with CMV can cause no symptom… Respiratory Syncytial Virus Infection , Respiratory Syncytial Virus Infection ... Perinatal Infection , Definition Perinatal infections are those infections affecting the mother during a pregnancy , and may be ...
Baterial Anatomy and Physiology | howMed Lectures
DeCS
Rickettsiaceae Infections [C01.150.252.400.789] Rickettsiaceae Infections * Spirochaetales Infections [C01.150.252.400.794] ... note BACTEROIDES INFECTIONS is also available. Allowable Qualifiers:. BL blood. CF cerebrospinal fluid. CI chemically induced. ... Infections with bacteria of the family BACTEROIDACEAE.. Annotation:. ... Infections à Bacteroidaceae Entry term(s):. Bacteroidaceae Infection. Infection, Bacteroidaceae. Infections, Bacteroidaceae. ...
Acarological Studies » Makale » A contribution to avian ectoparasite fauna of Turkey: the reports of feather mites and tick...
Infection Ecology and Epidemiology, 9 (1): 1547096. doi: 10.1080/20008686.2018.1547096. *Clifford, C.M. and Anastos, G. 1960. ... Rickettsiaceae). Journal of Medical Entomology, 51 (4): 864-867. doi:10.1603/ME13169 ... Infection Ecology and Epidemiology, 9 (1): 1547096. doi: 10.1080/20008686.2018.1547096. *Clifford, C.M. and Anastos, G. 1960. ... Frontiers in Cellular and Infection Microbiology, 3 (48): 1-6. doi: 10.3389/fcimb.2013.00048 ...
Tularemia | Profiles RNS