Pathogenicity of Escherichia coli O125 in commercial broiler chickens
2019
Asmaa Abd Elatiff | Azza A. El-Sawah | Mohamed M. Amer | Al-Hussein M. Dahshan | Hala Salam | Salama A.S.Shany
Commercial broiler chickens are frequently infected with Ecoli serotypes in form of collibacillosis whichcharacterized as an initial respiratory infection (air sacculitis) followed by generalized septicemia, perihepatitis andpericarditis. The present work aimed to study the ability of E.coli O125 previuosly isolated and identified fromdiseased broilers suffered from pericarditis , airsacculitis and perihapatitis to induce a disease and The current studyaimed to determine the pathogenicity of E. coli serogroup O125 in broiler chicks, a trial of prevention and treatmentusing probiotic ( Guardyazin-m) or antibiotic (Cipronate20%). The chicks were divided into seven groups includingcontrol negative, orally infected , subcutenously infected , probiotic treated group, and finally antibiotic treatedgroup. The clinical signs, mortality, performance parameters and postmortem examination as well as thepathological changes in liver and intestine were recorded. The probiotic group gave the best results in controllinginfection by E. coli O125 followed by antibiotic. In conclusion, the E. coli O125 serogroup was pathogenic to chickswhen experimentally inoculated, so particular attention must be directed toward E. coli O125 as a pathogen infectingbird. Also probiotics was of great value in protection against the E. coli infection and improve the performanceparameters of chicks . Its effect on feed consumption , weekly body weight gain and feed conversion rate (FCR) wasdetermined.
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