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Phenotypic and Genotypic Assessment of Antibiotic Resistance of Staphylococcus aureus Bacteria Isolated from Retail Meat

Authors Torki Baghbaderani Z, Shakerian A, Rahimi E

Received 5 December 2019

Accepted for publication 27 March 2020

Published 7 May 2020 Volume 2020:13 Pages 1339—1349


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Joachim Wink

Zeinab Torki Baghbaderani, Amir Shakerian, Ebrahim Rahimi

Department of Food Hygiene and Public Health, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran

Correspondence: Amir Shakerian
Department of Food Hygiene and Public Health, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
Tel +98 38333361045
Fax +98 3833361031

Background: Resistant Staphylococcus aureus (S. aureus) bacteria are determined to be one of the main causes of foodborne diseases.
Purpose: This survey was done to assess the genotypic and phenotypic profiles of antibiotic resistance of S. aureus bacteria isolated from retail meat.
Methods: Four-hundred and eighty-five retail meat samples were collected and examined. S. aureus bacteria were identified using culture and biochemical tests. The phenotypic profile of antibiotic resistance was examined using the disk diffusion method. The genotypic pattern of antibiotic resistance was determined using the polymerase chain reaction.
Results: Forty-eight out of 485 (9.89%) raw retail meat samples were contaminated with S. aureus. Raw retail buffalo meat (16%) had the highest incidence of S. aureus, while raw camel meat (4%) had the lowest. S. aureus bacteria exhibited the uppermost incidence of resistance toward tetracycline (79.16%), penicillin (72.91%), gentamicin (60.41%), and doxycycline (41.666%). The incidence of resistance toward chloramphenicol (8.33%), levofloxacin (22.91%), rifampin (22.91%), and azithromycin (25%) was lower than other examined antibiotics. The most routinely detected antibiotic resistance genes were blaZ (58.33%), tetK (52.08%), aacA-D (33.33%), and ermA (27.08%). Cat1 (4.16%), rpoB (10.41%), msrA (12.50%), grlA (12.50%), linA (14.58%), and dfrA1 (16.66%) had the lower incidence rate.
Conclusion: Raw meat of animals may be sources of resistant S. aureus which pose a hygienic threat about the consumption of raw meat. Nevertheless, further investigations are essential to understand supplementary epidemiological features of S. aureus in retail meat.

Keywords: Staphylococcus aureus, incidence, antibiotic resistance pattern, antibiotic resistance genes, retail meat

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