Clinical and Laboratory Diagnoses of Common Bacterial Diseases of Broiler and Layer Chickens

Abstract

The study was undertaken with a view to compare clinical and laboratory diagnoses of various bacterial diseases of poultry during the period from March 2009 to February 2010 in the laboratory of the Dept. of Microbiology and Hygiene, Bangladesh Agricultural University (BAU), Mymensingh. A total of 135 sick and dead chickens (47 broilers and 88 layers) were collected from 12 different poultry farms (4 broilers and 8 layers) of Mymensingh and Gazipur districts which were subjected for clinical followed by laboratory diagnosis. Clinical diagnosis was made on the basis of clinical history, clinical signs and postmortem findings of the affected birds whereas; confirmatory diagnosis was made by using cultural examination, Gram's staining and different biochemical tests. In this study, out of 47 broilers, 16 (34%) chickens were clinically diagnosed as colibacillosis, 11 (23.40%) as salmonellosis and 2 (4.25%) as fowl cholera. In the same way, out of 88 layer chickens, 28 (31.82%) were diagnosed as colibacillosis, 16 (18.18%) as salmonellosis and 11 (12.50%) as fowl cholera. In laboratory, out of 47 suspected broiler chickens, 12 (25.53%) chickens were diagnosed as colibacillosis, 7 (14.89%) as salmonellosis and 0 (0%) as fowl cholera. Correspondingly of the 88 layer chickens 22 (25%) were diagnosed as colibacillosis, 11 (13.64%) as salmonellosis and 8 (9.09%) as fowl cholera. So the findings concluded that clinical diagnosis is not always accurate like laboratory diagnosis because in most cases clinical history, clinical signs and post-mortem lesions of different bacterial diseases including mixed infections are almost similar to other related diseases and it is recommended to confirm laboratory diagnosis before treatment of the diseases.

Phenotypic, Genotypic, Multidrug Resistance Genes and Disinfectant Biocidal Effect of Pasteurella Multocida Isolated From Chickens

“…The prevalence of P.multocida (4 %; n=12/300) in this study was lower than the value reported in the earlier studies Hassan et al (2010) reported 12.05% prevalence in layer chicken and 4.25% in broiler chicken, whereas Hossain et al (2013) found 13.04% prevalence in chicken and Belal (2013) found 59.72% in backyard poultry. All the isolates subjected to mice inoculation tests killed the mice in 24 -48h.…”

Epidemiological Investigation of Pasteurella Multocida Infection in Poultry in Gazipur District of Bangladesh

“…Though disease prevalence of Sonali were found 11.25% and more was (12.87%) in layer, Belal (2013); Hasan et al (2010) and Hossain et al (2013) reported that the overall prevalence of FC was 11.42% in Gazipur and Sirajgonj districts. Besides, Hasan et al (2010) found 12.05% prevalence in layer and 4.25% in broiler chicken in Mymensingh and Gazipur districts which were very much close to our study, whereas Hossain et al (2013) found 13.04% prevalence in in Mymensingh district in chicken and Belal (2013) found 59.72% in backyard poultry in Sirajgonj district. In our study area, about 87.59% was mixed with other diseases which were mainly coli-enteritis, Newcastle disease, infectious coryza, coccidiosis and egg displacement etc.…”

Novel amoxicillin nanoparticles formulated as sustained release delivery system for poultry use

“…This growth pattern can be expected to continue; however, several factors either acting singly or in combination may hamper the production. In particular, bacterial diseases such as colibacillosis and salmonellosis have caused a huge economic loss through increasing mortality of animals and reducing meat production in the intensive farming system worldwide (Hasan, Ali, Siddique, Rahman, & Islam, ; Matin, Islam, & Khatun, ).…”