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Online Journal of Veterinary Research©
Volume 23 (3):185-189, 2019.
Prevalence of ixodid ticks in cows, buffalo, goats and sheep in coastal areas of Tamil Nadu, India.
A Varadharajan*, R Gnanasekar, S Kothandaraman and L Murali Krishnan.
Division of Animal Husbandry, Faculty of Agriculture, Annamalai University, Annamalai Nagar – 608 002, Tamil Nadu, India.
Varadharajan A, Gnanasekar R, Kothandaraman S, Murali Krishnan L., Prevalence of ixodid ticks in cows, buffalo, goats and sheep in coastal areas of Tamil Nadu, India, Onl J Vet Res., 23 (3):185-189, 2019. Authors report prevalence of Ixodid ticks on 288 cows, 120 buffaloes, 432 goats and 120 sheep in coastal areas of Tamil Nadu, India. The ruminants were grazed 5-8h per day and 12 collections of ticks from ears, tails, trunk and legs were done from October 2016 to September 2017. Ticks were preserved in chloroform and formalin, washed with distilled water treated with KOH and boiled until transparent for identification by keys (Krantz 1940; Sen 1938; Geevarghese et al., 1997), under stereo-zoom microscope. Of 920 animals, 520 were infested with a prevalence of ~54% mostly on sheep (70%) and least on buffalo (~42%). Hyalomma spp were identified in 15.3% followed by Rhiphicephalus haemophysaloides in 12.9%, Haemaphysalis bispinosa in 10% and Rhipicephalus sanguineus in 9.6%. Infestation was more frequent in summer (78.12%) compared with winter (49.68%) or the rain season (34.68%).
Key words: Epidemiology; Ixodid ticks; ruminants; Tamil Nadu, India.