Immune Response Evaluation in Commercial Turkeys Affected with Clostridial Dermatitis.

Clostridial dermatitis (CD), caused by and , is an economically important emerging disease of turkeys characterized by sudden deaths and necrotic dermatitis. Immune responses in CD-affected commercial turkeys are poorly understood. In the present study, was isolated from CD-affected commercial turkeys during a recent outbreak, and the tissues (skin, muscle, and spleen) were collected and analyzed for immune gene expression, along with samples from clinically healthy birds.

Histopathologic Lesion Scoring and Histomorphometric Methods for Measuring Vaccine Reactions in the Trachea of Broiler Chickens.

Severity of the tracheal histologic inflammatory response induced in broilers by ocular inoculation of two infectious bronchitis (IBV) and three Newcastle disease virus (NDV) commercial vaccines were evaluated. The vaccine was delivered by eye drop with a coarse spray to day-old chicks. The vaccines were given individually or in various combinations and were evaluated relative to nonvaccinated controls.