Abstract
This study was selected to find out the bacterial pathogens in egg yolk, egg shell, feed and air samples of poultry houses at Dinajpur district in Bangladesh with isolation, identification and characterization of bacterial pathogens present in those samples. For this study, a total of 147 samples comprising egg shell (36), egg yolk (36), feed (45) and air (30) were collected during the period from January to May, 2012 and the collected samples were then examined for the bacteriological study by using cultural, morphological and biochemical techniques. On the basis of their cultural, morphological and biochemical properties the isolated organisms were identified as Escherichia coli, Staphylococcus spp., Salmonella serovars and Bacillus spp. In this study it was observed that out of 147 samples a total of 51 were identified as bacterial pathogens in which egg shell containing 10 (27.78%), egg yolk 11 (30.56%), feed 20 (44.44%) and air 10 (33.33%) respectively. In this study it was also observed that the highest prevalence of bacterial pathogens in feed samples (44.44%) in comparison with egg shell (27.78%), egg yolk (30.56%) and air samples (33.33%). In this study it was demonstrated that out of four (04) pathogens Escherichia coli was more abundant (39.21%) in the layer house and its environment in comparison with Staphylococcus spp. (25.49%), Salmonella (23.52%) and Bacillus spp. (11.76%) respectively.Asian J. Med. Biol. Res. June 2017, 3(2): 168-174
Highlights
Poultry is emerging as an important agribusiness started practically during eighties (Hoque, 1997)
Biochemical tests A series of biochemical tests such as Methyl-Red (MR), Voges-Proskauer (VP), triple sugar iron (TSI), Indole test, Sugar fermentation, Motility, Indole and Urease (MIU), Catalase, Coagulase were performed according to the procedure described by Buxton and Fraser (1977), Merchant and Packer (1967) and Office International Des Epizooties (OIE) (2004)
Isolation and identification of bacterial pathogens In this study the colony characteristics of Escherichia coli was observed on different culture media and the morphology of this bacteria exhibited small rod shape, single or paired in arrangement that were similar to the findings of Mosupye and Holy (2000)
Summary
Poultry is emerging as an important agribusiness started practically during eighties (Hoque, 1997). The annual rate of ascending agribusiness is chicken 6.2% and duck 2.38% while in commercial bird it is 15% (DLS, 2008) This sector facing various problems related to production and health management. Salmonellosis is one of the most important bacterial disease in poultry industry that can transmit vertically and cause heavy economic loss through mortality and reduced productivity (Begum et al, 1993; Hoque et al, 1997; Kabir, 2010). It is potentially responsible for various pathogenic processes in man and animals including poultry (Freeman, 1985).Escherichia coli causing colibacillosis are of the most important infectious diseases of poultry (Kabir et al, 2017). Such information is required to take necessary actions for prevention and control of outbreak of diseases caused by potential avian bacterial pathogens
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