Hyalomma Anatolicum As the Main Infesting Tick in An Important Livestock Rearing Region, Central Area of Iran

Background: this study was carried out to determine the infestation of domestic ruminants to ticks in an im-portant livestock-rearing region, located in central part of iran. methods: ticks were collected from cattle, sheep, and goats and then were identified with appropriate identifica-tion keys to species level in two different ecological regions of plains and mountain in 4 seasons in 2015. results: totally 492 ticks from cattle, sheep, and goats in 34 herds were collected. totally, 18.53% of domestic animals were infected by ticks. all ticks were belonged to family ixodidae and classified into three genera and six species comprising hyalomma anatolicum (38.83%), hy. asiaticum (23.37%), hy. marginatum (2.85%), hy. sp. (3.45%), rhipicephalus sanguineus (14.02%) and haemaphysalis sulcata (10.98%). sex ratio of the collected specimens showed 241 (48.99%) male, 219 (44.51%) female and 32 (6.5%) nymph conclusion: studied area is important for production of livestock and dairy products. annually, many livestock products are exported to other parts from this region; therefore, it is very important to identify the infection rate of tick-borne diseases as well as safety factors on livestock.