Occurrence of multidrug-resistant Salmonella enterica serovar Enteritidis isolates from poultry in Iran

Abstract

Salmonella enterica is recognized as one of the major food-borne pathogens with more than 2,500 serotypes<br />worldwide. The present study addresses antimicrobial resistance of Salmonella enterica serovar Enteritidis<br />isolates in Iran. A collection of 151 Salmonella spp. isolates collected from poultry were serotyped to<br />identify Salmonella Enteritidis. Sixty-one Salmonella Enteritidis were subsequently tested against 30<br />antimicrobials. A high frequency of antimicrobial resistance was observed against nitrofurantoin (n=55,<br />90.2%) followed by nalidixic acid (n=41, 67.2%), and cephalexin (n=23, 37.7%). Multi-drug resistance<br />were observed in 35 (57.4%) out of 61 isolates. Twenty-six antimicrobial resistance patterns were observed<br />among the 61 Salmonella Enteritidis. All isolates were susceptible to ofloxacin, imipenem, enrofloxacin,<br />chloramphenicol, gentamicin, and 3rd and 4th generation cephalosporins. In conclusion, our results revealed<br />that implementing new policies toward overuse of antimicrobial drugs in Iranian poultry industry are of<br />great importance.