Three hundred and sixty veterinarians were administered questionnaire at the Nigerian Veterinary Medical Association 2009 annual convention to determine their knowledge and practice on Marek’s disease (MD). The questionnaires were retrieved for descriptive analysis. It was confirmed that 75% (95% CI 64.9% - 79.1%) respondents put MD frequency diagnosed compared to other poultry diseases between 5-10%, while 25% put it at 20-30%. About 58% of veterinarians indicated that, exotic laying birds are the most frequently diagnosed with MD. Approximately 8% diagnosed MD below 4 weeks of age, 75% between 4-16 weeks and 29% in birds above 16 weeks old. About 40% indicated mortality due to MD between 10 - 50% in a flock. Drop in egg production due to MD by 84% respondents was between 10-40%. Paralysis ranked highest as clinical manifestation of MD by 64%, emaciation 47%, stunted growth 33%, pale combs and wattles by 16% of the respondents. Liver scored highest with 71% of respondents as organ frequently affected spleen 47% and nerve 33%. Kidneys, lungs, heart, skin and gonads were ranked 31%, 22%, 17%, 17% and 11% respectively. About 60% respondents claimed nodular lesions were seen at postmortem, while 39% of the respondents reported diffused lesions. Some respondents (39%) used HVT, 26% used Rispens and 9% used SB126 vaccines to control MD. About 68% of respondents confirmed diagnosis of MD based on clinical signs and gross lesions while 12% on clinical signs, gross and microscopic lesions. The Significance of this study is to test the awareness and sensitize professionals to improve prevention and control of MD in Nigeria.
Marek’s Disease, Knowledge, Practices, Nigeria