STUDIES ON AVIAN COLIBACILLOSIS IN BAHRI LOCALITY OF KHATROUM STATE, SUDAN
Journal Title: WORLD JOURNAL PHARMACY AND PHARMACEUTICAL SCIENCE - Year 2018, Vol 7, Issue 9
Abstract
Forty five poultry farms located in Bahri locality of Khartoum were investigated for the presence of avian colibacillosis and the study was extended for 6 months of the years 2016 and 2017. The prevalence rate of colibacillosis in Bahry locality poultry farms was 11.1%, the prevalence rate increased with broilers poultry farms 3 (6.67%) than layers farms 2 (4.45%) and it was inversely proportionate to the age of birds. The prevalence of avian colibacillosis was higher (8.9%) in closed system farms than open system (3.2%). This is the first report of incidence rate of avian colibacillosisin Bahri locality. In this investigation a total of 92 bacterial isolates were obtained from 81 diarrhoeic samples, according to the cultural characteristics, bacterial morphology and biochemical reactions results, the identified bacteria were: Escherichia coli 59.8%, Proteus mirabilis 19.6%, Enterococcus faecalis 6.5%, Klebsiella pneumonae sub spp. ozaenae 5.4%, Salmonella spp. 3.3%, and Staphylococcus aureus 5.4%. Gram negative bacteria represented the predominant isolated bacteria (94.6%), compared to gram positive bacteria (5.4%). A total of 55 bacterial isolates were obtained from 45broilers diarrhoeic samples, According to the cultural characteristics, bacterial morphology and biochemical reactions results, the identified bacteria were: Escherichia coli 65.5%, Proteus mirabilis 16.3%, Staphylococcus aureus 9.1%, Salmonella spp. 5.5% and Klebsiella pneumonae sub spp. Ozaenae 3.6%. Gram negative bacteria represented the predominant isolated bacteria (90.9%), compared to gram positive bacteria (9.1%). A total of 37 bacterial isolates were obtained from 36layersdiarrhoeic samples, According to the cultural characteristics, bacterial morphology and biochemical reactions results, the identified bacteria were: Escherichia coli 51.4%, Proteus mirabilis 24.3%, Enterococcus faecali16.2% and Klebsiella pneumonae sub spp. Ozaenae 8.1%. Ten E. coli isolates were selected randomly and examined for their production of heat-stable enterotoxin using Suckling mouse test (SMT). Seven isolates (70%) out of 10 gave positive results with SMT test. This is the first report in Sudan using suckling mouse test (SMT) for detection of heat-stable enterotoxin (STa) in E.coli isolated from cases of avian colibacillosis.
Authors and Affiliations
Abubaker A. El Ayis
Keywords
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