Characterisation of Campylobacter spp. Isolated from Poultry in KwaZulu-Natal, South Africa

Antibiotics

LindaA. Bester¹  AnouM. Somboro²  Stephanie Pillay²  AkebeL. K. Abia²  DanielG. Amoako²  ChristianaO. Shobo²  SabihaY. Essack³  Keith Perrett⁴ 

[1] Rural Development—Veterinary Service, Pietermaritzburg 3200, South Africa;Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;Biomedical Resource Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;;Epidemiology Section, KwaZulu-Natal, Agriculture &

关键词: farm-to-fork;    antibiotic resistance;    virulence;    campylobacter;    clonality;    poultry;    south africa;   

DOI  :  10.3390/antibiotics9020042

来源: DOAJ

【 摘 要 】

This study investigated the antibiotic resistance, virulence profiles, and clonality of Campylobacter jejuni and Campylobacter coli isolated from an intensive poultry farming system in KwaZulu-Natal, South Africa. Following ethical approval, samples were collected over six weeks using the farm-to-fork approach. Campylobacter spp. were identified using culture, confirmed and differentiated to species level by PCR, and subjected to antibiotic susceptibility testing. Selected antibiotic resistance (and mutations) and virulence genes were screened by PCR and confirmed by DNA sequencing. Genetic relatedness amongst the isolates was ascertained using pulsed-field gel electrophoresis. In all, 105 isolates were confirmed as belonging to both Campylobacter coli (60; 57%) and C. jejuni (45; 43%). The highest resistance was recorded against erythromycin and clindamycin. The gyrA mutation, A20175C/A2074G point mutation, tet(O), and cmeB, all associated with antibiotic resistance, were detected. All the virulence genes (pldA, ciaB, cdtA, cdtB, cdtC, dnaJ, except for cadF) were also detected. Isolates were grouped into five pulsotypes displaying 85% similarity, irrespective of their resistance profiles. The numerous permutations of clonality, antibiotic resistance, and virulence profiles evident in Campylobacter spp. pose a challenge to food safety and necessitate a comprehensive understanding of the molecular epidemiology of this organism to decrease its spread in the food chain.

【 授权许可】

Unknown