Detection and Molecular Characterization of Staphylococci from Eggs of Household Chickens.

Authors:
Muhammad Ali Syed
Muhammad Ali Syed
Comsats Institute of Information Technology
Pakistan
Charlene R Jackson
Charlene R Jackson
950 College Station Road
United States
Dr. Hazem Ramadan, PhD
Dr. Hazem Ramadan, PhD
Faculty of Veterinary Medicine/Mansoura University
Associate Professor of Zoonoses
Zoonoses
Mansoura | Egypt
Sumera Bibi
Sumera Bibi
University of Haripur
Bushra Fatima
Bushra Fatima
University of Haripur
Harīpur | Pakistan

Foodborne Pathog Dis 2019 Apr 19. Epub 2019 Apr 19.

2 Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS, U.S. National Poultry Research Center, Athens, Georgia.

Eggs are a healthy and nutritious food source, but may be contaminated by bacteria. Previous studies have reported the presence of staphylococci in eggs of farmed chickens, but no study has evaluated the staphylococcal population of eggs from household chickens. In this study, staphylococci from eggs ( = 275) of household chickens collected from November 2016 to March 2017 from different villages of Khyber Pakhtunkhwa province, Pakistan, were characterized. Seven species of staphylococci were identified from 65 eggs, including the predominant species, (49/275; 17.8%). isolates ( = 73) were tested for antimicrobial susceptibility, presence of resistance genes, genetic relatedness, and inhibitory activity against other bacteria. The majority of isolates were resistant to oxacillin (83.6%) and tetracycline (24.7%), but also exhibited resistance to daptomycin and linezolid (5.5% each). Of the 10 resistance genes tested, isolates were only positive for A (35.6%; 26/73), C/C1 (2.7%; 2/73), and (K) (14/73; 19%). Using pulsed-field gel electrophoresis (PFGE), nine clusters had identical PFGE patterns. Isolates produced inhibitory activity against a broad spectrum of bacteria; 20.5%, 19.2%, 17.8%, and 16.4% of were able to inhibit growth of serotype Typhi, methicillin-susceptible , , and methicillin-resistant , respectively. This study demonstrated the presence of genetically related antimicrobial-resistant from eggs from household chickens. Like table eggs, eggs of household chickens also contain staphylococci that may be resistant to antimicrobials used to treat human infections. These data will allow comparison between staphylococci from eggs from different sources and may indicate the relative safety of eggs from household chickens. Further study of these egg types and their microbial composition is warranted.

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Source
https://www.liebertpub.com/doi/10.1089/fpd.2018.2585
Publisher Site
http://dx.doi.org/10.1089/fpd.2018.2585DOI Listing
April 2019
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