PREVALENCE OF DISEASES IN DAIRY COWS AND EFFECTS OF ANTHELMINTIC TREATMENT ON MILK YIELD OF PARTURATED COWS

Abstract

The study was conducted to investigate the prevalence of diseases in dairy cows in relation with seasons and effects of anthelmintics treatment on milk yield in parturated cows. It was carried out for a period of one year starting from July, 2016 to June, 2017. A total 3000 clinical cases were recorded on the basis of owner’s complain, general examination, clinical signs, laboratory test and management system. According to study the highest prevalence was recorded by parasitic diseases 32.9% followed by viral diseases 18.84%, bacterial diseases 15.77%, reproductive disorder 14.7%, general clinical disorders 14.53%, other clinical disorder 2.84% and surgical affection 0.43% respectively. Among bacterial, viral and reproductive diseases the highest prevalence were found in mastitis 9.16%, foot and mouth disease 14.66% and repeat breeding 5.7% respectively. The most common surgical disorder was upward patellar fixation 0.43%. On the basis of season it was found that prevalence of diseases were significantly (P <0.01) higher in summer season 51.03% followed by winter season 25.23% and comparatively lower in rainy season 23.73%. Among the total population, 48 parturated mixed breed dairy cows were selected to determine the effects of anthelmintics treatment on milk yield. In treated lactation, treatment with combined Ivermectin and cloursulon (A-Mectin plus®) @ 1ml/50kg body weight subcutaneously was significantly (P<0.05) increase the average milk yield 25% on 90 days than nitroxynil (Nitronex®) and combined triclabendazole and levamisole (Trilev®). Furthermore it has been found that parasitic infestation, mastitis, foot and mouth disease and repeat breeding commonly affect dairy cows and anthelmintic has positive impact on milk yield of parturated cows.