First report of detection of -1 and virulence genes in avian pathogenic in the center of Algeria.

Background: Antimicrobial resistance in avian pathogenic (APEC) represents a major concern in the avian industry worldwide and limited studies have investigated Colistin resistance among APEC in Algeria.

Aims: Investigate antibiotic resistance, in particular, Colistin, and mediated-Colistin resistance () genes, as well as the virulence genes in APEC.

Methods: One hundred were isolated from poultry suspected of colibacillosis.

Serogrouping and antibiotic resistance of isolated from broiler chicken with colibacillosis in center of Algeria.

Aim: Colibacillosis is considered as one of the major bacterial infections in avian pathology. The excessive use of antibiotics reduced their effectiveness, which eventually led to the risk of emergence of antibiotic resistance. The aim of this study was to isolate, identify and serotype the pathogenic strains and to determine their antibiotic susceptibility.