Evaluation of biofilm production capacity in salmonella isolated from chicken meat in Tehran municipally daily fruit and vegetable markets

One of the major issues in food hygiene and safety is the emergence of antibiotic-resistant bacteria. Pathogens as well as biofilm formation can play a role in increasing bacterial resistance. In this study, biofilm formation in Salmonella isolates from chicken, drug resistance and drug resistance pattern were investigated.

In this study, 75 samples of chicken infected with Salmonella bacteria were studied. The rate of biofilm formation was assessed by microtiter plate method. Drug resistance and evaluation of drug resistance pattern were also evaluated.

The results showed that in 92% (69/75) of the samples Salmonella biofilm were formed, among which the moderate biofilm with 65.2% had the highest biofilm production. Concurrent resistance to 2 classes of antibiotics (2DR) with 31.8% (22/69) was the most common type of multidrug resistance (MDR) among the biofilm-forming isolates. Resistance to imipenem, ceftriaxone and cefotaxime was observed in only 1 biofilm formation sample.

In this study, high biofilm formation was observed in Salmonella contaminated chicken meat samples. The high rate of antibiotic resistance in biofilm constituents is due to the increasing attention to hygienic aspects of non-transmission of food contamination to humans.