@article{El-Nagar_Ahmed_Ibrahim_2021, title={Detection of Biofilm in Multidrug Resistant Staphylococcus Strains Isolated from Chicken }, volume={11}, url={https://advetresearch.com/index.php/AVR/article/view/657}, abstractNote={<p>Staphylococcosis infections are common in poultry worldwide because of the causative bacteria resisting a wide range of commonly used antibiotics. The formation of biofilm is the hallmark characteristic of staph infection. Biofilms constitute reservoir of pathogens and are associated with resistance to antimicrobial agent and chronic infections. In this study 90 multidrug resistant staphylococcus strains (61 coagulase- negative staphylococcus (CNS) and 29 <em>S. aureus</em>) were screened by tissue culture plate method for biofilm formation and presence of <em>mecA</em>, <em>icaA</em>, and <em>icaD</em> genes by PCR technique. 38 (42.2%) isolates were strongly positive for biofilm production, 49 (54.4%) were moderate biofilm producers and 3 (3.4%) were weak or negative for biofilm formation. All biofilm producing strains were positive for <em>icaA</em> and <em>icaD</em> genes, and all biofilm negative strains were negative for <em>icaA</em> gene. Biofilm production was higher in methicillin resistant strains as compared to the methicillin sensitive strains of <em>Staphylococcus</em> species. From this study attention should be given in treatment of staphylococcus because Staphylococci isolated showed a high extent of biofilm production. All biofilm producing <em>Staphylococci</em> are positive for <em>icaA</em> and <em>icaD</em> genes, which indicates the important role of <em>ica </em>genes as virulence markers in staphylococcal infections.</p>}, number={2}, journal={Journal of Advanced Veterinary Research}, author={El-Nagar, Shimaa and Ahmed, Zeinab and Ibrahim, Enas M.}, year={2021}, month={Apr.}, pages={77-81} }