Lice infestation is one of the major problems to the duck farming, causing irritation that lead to lowered feed intake, retarded growth, reduced weight gain and decreased egg production. The present communication deals with occurrence of different species of lice in a desi duck from Cauvery delta region of Tamil Nadu. A farmer from Thanjavur district of Tamil Nadu brought five dead two year old native ducks for necropsy at Dept. of Veterinary Pathology, Veterinary College and research Institute, Orathanadu, Tamil Nadu. External examination of ducks revealed presence of 13 lice specimen in one bird. They were examined and identified as Trinoton querquedulae (n= 8), Anatoecus dentatus (n= 4) and Anaticola crassicornis (n= 1) morphologically. This study is the first to establish the presence of mixed lice infestation in native ducks from Cauvery delta region of Tamil Nadu and also first repot of Trinoton querquedulae in ducks from India.

Caprine pediculosis is an ectoparasitic disease of great concern among goat farmers in India. It may be caused by either sucking lice or chewing lice; the latter one results in severe skin lesions, leading to production loss. This study evaluated the effectiveness of the macrocytic lactone drug, ivermectin, administered via subcutaneous injection, against chewing lice Bovicola (Damalinia) caprae infestation in naturally infested goats. The study was conducted on 20 goats with severe B. caprae infestation. Animals of group A (n = 10) were treated using a single dose of ivermectin (200 µg/kg body weight) subcutaneously and animals of group B (n = 10) underwent placebo therapy using normal saline. The animals were examined on days 0, 3, 7, 14, 21, 28, 42 and 56 for lice counts. There was 100% elimination of lice in all animals of group A and effective protection from re-infection remained at least for 21 days. Considerable improvement in haematological parameters was also observed by day 21. Based on this study, ivermectin injected via a subcutaneous route can be used effectively for the therapeutic and prophylactic management of chewing lice infestation in goats maintained under an extensive grazing system.