Enquête sérologique sur quelques maladies aviaires dans la région du Nord Guéra (Tchad)

Serological Investigation on Five Fowl Diseases in the North Region of Guera (CHAD). A serological survey concerning five fowl diseases are carried out from three subprefectures (Mangalme, Bitkine, Mongo) of the North Guera, localites situated at 550 km in the North of N'Djamena. A total of 270 chickens of approximatly 12 months old are bought which 103 around Mangalme, 93 around Mongo and 82 around Bitkine. The results show low rate of infection for Newcastle disease (7.33 %), Gumgoro disease (8.66 %) and Salmmonella pullorum infection (8.73 %). Higher rates are found for infectious bronchitis (32 %) and Mycoplasma synoviae infection (36.66 %). Different type (2, 3 or 5) of anti-bodies are found sometimes in the same chicken showing that several infections circulate in the same hen house. As far as the are concerned, infectious bronchitis (83 %) and Mycoplasma synoviae infection (72 %) have very high rate followed by pullorosis (55 %). These results prove that these diseases sometimes unkown by field veterinary agents are widespread. Any improvement fowl production need a best control of the diseases by training field veterinary agents and poultryman on prevention poultry disease.