author(s)
Nonigopal Shit, Dilip Kumar Hajra, Mrityunjay Mandal, Rupsanatan Mandal, Suprakash Pal and Ashutosh Sarkar

abstract
The present study was aimed to understand the epidemiological prevalence of the gastrointestinal parasitism in cattle population. A total 1620 faecal samples were collected from three eco-regions under different seasonal conditions. Faecalysis was performed following standard protocol. GI helminths, nematode (Toxocara, Strongyloides, Strongyle and Trichuris), cestode (Moniezia) and trematode (Paramphistomes and Fasciola) were examined based on morphology of eggs. The overall prevalence was recorded upto 60.68% when Paramphistomes and Strongyle represented the highest and lowest degree of infection. The location specific study confirmed the highest magnitude of nematode, cestode and trematode infection at AlipurduarII, Falakata and Mathabhanga respectively. Compared to others, the rainy season was most congenial to GI parasitism. Young animals (6-24months) were severely affected with highest cestode infection (3.14%) among different age groups. This study affirms host, parasite and environment relation which would be helpful in strategic control programme for better livestock production in the sub-Himalayan Terai Zone.