Ehrlichia Chaffeensis Research Articles

DETECCIÓN SEROLÓGICA DE Ehrlichia canis y Ehrlichia chaffeensis EN PERSONAL DE CLÍNICAS VETERINARIAS EN LIMA METROPOLITANA

El objetivo del presente estudio fue determinar la presencia de seropositividad a Ehrlichia canis y Ehrlichia chaffeensis en personal de clinicas veterinarias y en personas en contacto con canes con Ehrlichiosis canina, utilizando la prueba de inmunofluorescencia indirecta. Se emplearon 90 muestras de suero de 55 varones y 35 mujeres. Se encontro 23.3% de seropositividad a E. canis y 20.0% a E. chaffeensis, sin asociacion estadistica por efecto de genero

A preliminary survey on the ticks carrying Ehrlichia and Anaplasma in the Southern marginal zone of Gurbantunggut Desert

To understand the status of ticks carrying Ehrlichia and Anaplasma in the southern marginal zone of Gurbantunggut Desert, we collected and classified ticks from livestock in 11 locations of three different habitats in the southern marginal zone of Gurbantunggut Desert. Ticks were screened by nested polymerase chain reaction (PCR) and their 5' hypervariable regions of 16S rRNA genes were amplified by semi-nested PCR. The PCR products were sequenced and compared to DNA sequences in GenBank to identify the Anaplasmataceae species carried by the ticks. The collected 708 ticks (classified 236 specimens) were identified as 8 species of 4 genera. Among these specimens, 25 (10.59%) were positive for Ehrlichia and Anaplasma. Ehrlichia chaffeensis, Ehrlichia canis, Anaplasma marginale and Anaplasma ovis were found in Hyalomma asiaticum,Rhipi cephalus sanguineus, Hyalomma detritum and Haemaphysalis longicornis, respectively by sequence comparison. This study confirmed at molecular level that E. chaffeensis, A. marginale, A. ovis and E. canis are present in ticks carrying Ehrlichia andAnaplasma in the southern marginal zone of Gurbantunggut Desert. Key words: Ehrlichia, Anaplasma, tick-borne, southern marginal zone of Gurbantunggut Desert.

Investigation on Ehrlichia chaffeensis and Anaplasma phagocytophilum infection among farmers and domestic animals in rural areas of Beijing, China

To investigate the status of Ehrlichia (E.) chaffeensis and Anaplasma (A.) phagocytophilum infection among farming populations and domestic animals in the rural area of Beijing, China. Blood samples from 562 farmers and 163 blood samples including 90 goats, 71 ox and 2 dogs, were collected. Specificity of IgG antibodies against E. chaffeensis and A. phagocytophilum were tested by micro-indirect immunofluorescent assay (mIFA). 16S rRNA genes of A. phagocytophilum were amplified from the domestic animal blood samples and products were sequenced and analyzed by nested PCR. The positive rates of E. chaffeensis and A. phagocytophilum antibody were 16.5% and 14.0% respectively for farmers. The total positive rates of A. phagocytophilum were 2.3% and 0 for both goats and oxen respectively. No antibody was found for the 2 tested dogs. The PCR positive rates were 48.9% and 23.9% for goats and oxen respectively. Three dominant varieties of A. phagocytophilum were demonstrated in goats and oxen. The prevalence rates of E. chaffeensis and A. phagocytophilum were identified in the rural areas of Beijing.

Sero-epidemiologic investigation on tick-borne diseases of humans and domestic animals in Zhejiang province

To investigate the seroprevalence of tick-borne diseases in humans and domestic animals from rural areas of Zhejiang province. Anji county, Jindong district and Tiantai county were selected for samples collection according to their geographic locations and historical prevalence of tick-borne diseases. Blood samples of humans and domestic animals were collected in the three sites. An indirect immuno-fluorescent antibody test was used to determine the presence of IgG antibodies of Rickettsiae heilongjiangii, Orientia tsutsugamushi, R. typhi, Anaplasma phagocytosis, Ehrlichia chaffeensis, Bartonella, R. hainan and Coxiella burnetii in these samples. Six hundred and eighty-three blood samples including 579 from humans and 104 from domestic animals (53 from cattles and 51 from sheep) were collected from the three sites. Antibody positive rates of Orientia tsutsugamushi, R. typhi, Ehrlichia chaffeensis and Coxiella burnetii were significantly different between these sites. IgG from all the 8 pathogens were detected in samples from humans. It was found that the sero-prevalence rates of R. typhi, Bartonella and C. burnetii (20.7%, 10.9%, 5.5%) of adults were higher than those of other Rickettsiae under investigation. The seroprevalence of R. typhi increased along with age. IgG from the 7 pathogens were detected in samples from domestic animals except for Anaplasma phagocytosis. The sero-prevalence rates of R. typhi, Bartonella and R. hainan (69.2%, 51.0%, 22.1%) of adults were higher than those of other Rickettsiae investigated. Tick-borne diseases did spread widely in humans and domestic animals from different rural areas of Zhejiang province. The sero-prevalence rates of R. typhi, B. henselae, R. hainan and C. burnetii were higher than that from other pathogens.

Rhabdomyolysis Associated with Ehrlichia chaffeensis Infection

Rhabdomyolysis Associated with Ehrlichia chaffeensis Infection

AN OVERVIEW OF HUMAN EHRLICHIOSIS.

In 1986, organisms from the rickettsial genus ehrlichia were first noted to cause disease in humans in the United States. The species Ehrlichia chaffeensis is thought to be responsible for most cases. These two reports provide an overview …