Antimicrobial resistance of non-typhoidal Salmonella isolates from egg layer flocks and egg shells

International Journal of Food Microbiology
Vivek V PandeKapil Chousalkar

Abstract

This study was conducted to examine the antimicrobial resistance (AMR) of Salmonella spp. isolated from commercial caged layer flocks in New South Wales and South Australia. All Salmonella isolates (n=145) were subjected to phenotypic and genotypic characterisation of AMR and carriage of integrons. The majority of Salmonella isolates (91.72%) were susceptible to all antimicrobials tested in this study. Limited resistance was observed to amoxicillin and ampicillin (5.51%), tetracycline (4.13%), cephalothin (2.06%) and trimethoprim (0.68%). None of the isolates were resistant to cefotaxime, ceftiofur, ciprofloxacin, chloramphenicol, gentamycin, neomycin or streptomycin. A low frequency of Salmonella isolates (4.83%) harboured antimicrobial resistance genes and a class 1 integron. The most commonly detected AMR genes among the Salmonella isolates were blaTEM (2.07%), tet A (1.38%) and dhfrV (0.69%). Overall, Salmonella enterica isolates exhibited a low frequency of AMR and represent a minimal public health risk associated with the emergence of multidrug resistant Salmonella spp. from the Australian layer industry.

References

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Aug 16, 2014·International Journal of Food Microbiology·Vaibhav C GoleKapil K Chousalkar

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Citations

Mar 5, 2016·Frontiers in Microbiology·Vivek V PandeKapil K Chousalkar
Feb 14, 2018·International Journal of Environmental Research and Public Health·Terence OdochYngvild Wasteson
Jul 23, 2019·Australian Veterinary Journal·E M ParkerA J Parker
Jul 18, 2020·Animals : an Open Access Journal From MDPI·Hamid Reza SodagariShafi Sahibzada
Jul 1, 2021·Veterinary Research Communications·Shafayat ZamilHimel Barua

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