Traceability status of food pollution and foodborne diseases caused by Salmonella covalis (S.covalis) in He’nan Province from 2016 to 2020

Abstract

ObjectiveTo study the traceability status of food pollution and foodborne diseases caused Salmonella covalis （S.covalis） in He’nan province from 2016 to 2020.Methods22 strains of S.corvallis from foods and 5 strains from diarrhea patients were isolated from 2016 to 2020 in He’nan Province. Serotyping， drug susceptibility test and PFGE molecular typing were carried out according to the National Food Safety Risk Monitoring Manual. PFGE and susceptibility data were clustered using BioNumerics 7.6 software package.Results22 strains of foodborne S.corvallis were all from fresh meat. According to results of drug susceptibility test， the multiple drug resistance of foodborne strains was not very serious， while the drug resistance spectrum of strains from diarrhea patients was complex， some were sensitive strains and two strains of them were super resistant bacteria with 13 multiple drug resistance. According to the results of PFGE molecular typing， there were high similarities among food strains in the same region in the same period， suggesting the probability of aggregation of contaminated food in a certain area in summer. According to the comparison and tracing of diarrhea patient strains and food strains， there was no disease directly caused by food， and the disease was caused probably after transmission.ConclusionFood safety risk monitoring data can provide effective clues for market supervision， the popularization and application of drug resistance monitoring and molecular typing technology has promoted the traceability and precise prevention of foodborne diseases， and greatly achieved the goals of disease prevention and health protection.

Keywords

• salmonella. covalis
• foodbrone diseases
• tracing
• molecular typing