hyalomma dromedarii (h. dromedarii) is a very characteristic tick with a cosmopolitan distribution, which is closely associated with camels. it is well adapted to extreme dryness of habitat and to camel hosts. in this study, we studied rural husbandry of one-humped camels (dromedaries) in a village in south-west of semnan (biabanak). a total of 163 ticks (94 adults and 67 nymphs) were found on ...

We experimentally infected Amblyomma aureolatum ticks with the bacterium Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever (RMSF). These ticks are a vector for RMSF in Brazil. R. rickettsii was efficiently conserved by both transstadial maintenance and vertical (transovarial) transmission to 100% of the ticks through 4 laboratory generations. However, lower reproductive...

Members of the genus Coxiella can be transmitted from ticks to humans during contact with animals; Coxiella may thus spread from the infected horses or ticks to humans. In this study, the presence of Coxiella burnetii and Coxiella-like endosymbionts (CLE) in ticks found on infested horses was determined using PCR and genotyping. A total of 213 ticks were randomly collected from 51 horses (4-5 t...

This study addresses a meta-analysis of the distribution Rickettsia spp. in Neotropical region, as well their associations with ticks and vertebrates. A total 219 published reports on target region were compiled, providing 599 records 31 species recorded 50 Ixodidae. The aim is to capture phylogenetic relationships between rickettsiae carrying them focus co-speciation ticks-rickettsiae. We comp...

were typical of lymphangitis-associated rickettsiosis, and most cases of rickettsioses in southern France in the spring are caused by R. sibirica mongolitimonae. Clustered cases of SFG rickettsiae infection have been reported in Europe, including southern France (3,6). In 2007, R. conorii and R. massiliae infections in humans were reported (3). In 2010, cases for which we were unable to discrim...

Boutonneuse fever caused by Rickettsia conorii is transmitted mainly by the brown dog tick, Rhipicephalus sanguineus. We collected 540 ticks in Marseille, France, and tried to isolate as many strains of rickettsia as possible. Ticks were evaluated for the presence of rickettsia by the hemolymph test and by a new culture system, the centrifugation-shell vial technique. We avoided contamination i...

Background: Ticks are a major arthropod vector of zoonotic diseases affecting both humans and domestic animals worldwide. Thus, studying tick microbiota would aid in understanding the potential threats posed by ticks. Methods: Approximately 8,000 unfed ticks, identified as Dermacentor nuttalli , were collected from sylvosteppe western Tianshan mountains. To investigate their pathogens, we divid...

In the present study, pathogenicity of four native strains of Entomopathogenic fungus; Metarhizium anisopliae, was studied against adult stage of Ixodes ricinus. For this purpose a total number of 180 adult ticks were examined in triplicate. Thirty ticks for each strain and negative and positive controls were immersed in 2.4×107 fungal conidia/ml in vitro. Samples were incubated in separate Pet...