Indian Cattle Tick

📖 Description

Rhipicephalus microplus (formerly Boophilus microplus) — the Indian Cattle Tick or Tropical Cattle Tick — is the single most economically important ectoparasite of cattle in India and the entire tropical world. India has the world’s largest cattle population (~305 million head, including buffalo) and a livestock sector that contributes ~4.5 % of national GDP and supports the livelihoods of ~200 million rural households. R. microplus is found in every Indian state, with the highest infestation rates in the high-rainfall coastal and northeastern tracts (Kerala, Karnataka, West Bengal, Assam) where the humid microclimate supports year-round tick reproduction. The tick’s economic impact is staggering — annual losses to the Indian cattle industry are estimated at ~₹3,000 crore (~US$375 million), comprising: (1) direct blood-feeding losses (anaemia, weight loss, 10–25 % drop in milk yield in dairy cattle, hide damage), and (2) disease transmission (babesiosis, anaplasmosis, theileriosis). A single engorged female drinks ~1.5 ml of blood; a heavy infestation of 200 ticks per animal can remove ~300 ml of blood daily — equivalent to a continuous low-grade haemorrhage. The tick has also developed severe acaricide resistance in India: surveys by the Indian Veterinary Research Institute (IVRI, Izatnagar) have documented multi-class resistance to synthetic pyrethroids, organophosphates, and amitraz in field populations from Uttar Pradesh, Punjab, and Tamil Nadu, threatening the long-term sustainability of chemical-based tick control. The tick’s biology is also remarkable for its one-host lifecycle — larva, nymph, and adult all feed on the same individual host, dropping off only as an engorged adult female to lay eggs on pasture. This lifecycle allows the tick to multiply explosively on a single infested animal: one female lays 2,000–4,000 eggs, and a single infested cow can seed an entire pasture with millions of tick larvae within 3–4 months.