Sequential Pathological Study of Fowl Typhoid in Experimentally Infected Chicks

Abstract

This study was undertaken to examine the sequential pathological study of fowl typhoid disease in experimentally infected chicks. A total of 40 chicken feed samples was randomly collected from different shops in Ihiala market and screened for Salmonella enterica serovar Gallinarum using pour plate method. The isolate obtained was characterized and identified using the morphological and biochemical characteristics. The pathogenic potential of the isolate on day old chicks was investigated by challenging the day old chicks orally using 0.5ml of the inoculum (10⁸cells/ml). All the chicks were kept under complete examination for 2 weeks for obvious pathological signs and lesions. Salmonella enterica serovar Gallinarum was detected in 13(32.5%) chicken feed samples analyzed. Obvious pathological signs and lesions were significantly (P˂0.5) seen among the infected chicks whereas the non-infected chicks showed no obvious pathological signs. The internal organs (liver and spleen) of the infected chicks showed significant (P˂0.5) viable counts of the challenged organism, which was mostly recorded in the spleen. This study has shown that Salmonella enterica serovar Gallinarum isolated from chicken feed samples exhibited reasonable pathological features among the infected chicks.