background: the distribution and preferences of ticks of animals in central of iran were studied four times a year. methods: one thousand seven tick specimens were collected from different localities including isfahan, chaharmahalbak­htiary, eastazarbaijan, west azerbaijan, kordestan, kermanshah, lorestan and fars. results: most of sampled animals in this area were infested. we also encountered...

Hepatozoonosis is a protozoal disease caused by various species of Hepatozoon. This parasite is transmitted from tick; the main vector of Hepatozoon canis is usually the brown dog tick (Rhipicephalus sanguineus). However, several species of ticks are disposed as the alternative vectors. Dogs are usually infected by eating the tick or a part of the tick organ infected by the mature oocysts conta...

background tick paralysis is a disease of human and animals characterized by an acute ascending flaccid motor paralysis. the condition may terminate fatally unless the tick(s) are removed before respiratory paralysis occurs. patient a 48 years old female was referred to a clinic in tehran with edema at the head and neck regions. she had fever and disequilibrium. she reported a travel to mountai...

The genus Anaplasma (Rickettsiales: Anaplasmataceae) includes obligate tick-transmitted intracellular organisms, Anaplasma phagocytophilum and Anaplasma marginale that multiply in both vertebrate and tick host cells. Recently, we showed that A. marginale affects the expression of tick genes that are involved in tick survival and pathogen infection and multiplication. However, the gene expressio...

Ticks require blood meal to complete development and reproduction. Multifunctional tick salivary glands play a pivotal role in tick feeding and transmission of pathogens. Tick salivary molecules injected into the host modulate host defence responses to the benefit of the feeding ticks. To colonize tick organs, tick-borne microorganisms must overcome several barriers, i.e., tick gut membrane, ti...

We propose a tree-structured heterogeneous autoregressive (tree-HAR) process as a simple and parsimonious model for the estimation and prediction of tick-by-tick realized correlations. The model can account for different time and other relevant predictors’ dependent regime shifts in the conditional mean dynamics of the realized correlation series. Testing the model on S&P 500 and 30-year treasu...