Investigation of selected bacterial diseases in clinically sick and dead commercial poultry brought to Upazilla Veterinary Hospital, Hathazari and Chittagong Veterinary and Animal Sciences University

Abstract

Colibacillosis and salmonellosis are considered as the most common bacterial diseases of poultry regardless of production types. Post-mortem on 38 chickens (either sick or dead) presented to veterinarians was performed during internship rotation at CVASU (January-February 2017) and UVH, Hathazari (March -April and July -August 2017) for this clinico-epidemiological study to investigate colibacillosis and salmonellosis with the specific aims of evaluating the proportionate prevalence of these diseases in commercial poultry and to describe the frequency of lesions and drugs prescribed against the diseases. Post-mortem lesions and clinico-epidemiological data along with drugs prescribed were recorded in a structured record keeping sheet for each individual case. Farmer’s verbal consent was taken prior to interview. Data obtained through the study were analyzed by STATA-13. Descriptive analysis was conducted. Among the cases 17 was found for colibacillosis and 21 for salmonellosis. Colibacillosis dominated in broiler chickens (76.5%). Salmonellosis was detected in layer chickens (100%). Birds from Nahar Agro Group were found to have more frequency of disease (around 50%).For Colibacillosis commonly observed post-mortem lesions were airsacculitis, omphalitis, pericarditis and perihepatitis. Common lesions produced by Salmonellosis were distended ureter with urate deposition, hemorrhagic liver and follicle, necrotic liver, peritonitis and ascites, white plaque in intestine, degenerated ova and peritonitis. For the treatment of colibacillosis, both single and combined preparation of antimicrobials along with supportive drugs was prescribed against the diagnosed cases. Proper farm management (for instance ventilation facility, density of birds, good biosecurity, restricted entry, litter management, disposal of dead birds), good hygiene of the farm (for instance clean feed, water, feeder, water trough) should be maintained to reduce the risk of colibacillosis and salmonellosis in poultry farm.As the antibiotic resistance and residue are world-wide concern, treatment protocol with sensitive drugs should be followed