author(s)
TA Vijayalingam, NV Rajesh and A Latchumikanthan

abstract
A Non-descript goat unit with the stock strength of 40 animals managed under semi-intensive system of rearing was reported to have acute mortality during the month of December 2019, rainy season in Tamil Nadu. Among the total strength of 40 goats, 2 numbers of buck in the age group of 5 months were succumbed to death within a week. It was reported that all the ailing animals showed inanition, reduction in weight and bodily condition and diarrhoea. Post mortem examination revealed debilitated carcasses with blanched visible mucus membrane and thin and pale muscles. Clear, straw coloured, thin fluid found in the abdominal cavity. All the visceral organs were pale. The abomasal contents were fluidal and sometimes mixed with free blood with large number of white coloured hairy nematodes morphologically indistinguishable from Haemonchus contortus. There were a few ulcerative haemorrhagic spots seen on the abomasal mucosa where the parasites found adhered. The microscopic examination of the sediment of the intestinal content revealed numerous eggs morphologically indistinguishable from the ova of Haemonchus contortus. The microscopic examination of the worms confirmed as Haemonchus contortus. The remaining goats in the flock were treated with suspension of Triclamar® (Triclabendazole 50 mg and Ivermectin IP 1 mg) orally at a dose rate of 1ml/ 5kg body weight, single dose and advised supplementation of multivitamin and minerals 3 days after the deworming. The farmer was also advised for rotational deworming once in every 3 months to overcome anthelminthic resistance. The goats recovered completely after deworming.