Abstract
Salmonella is an important food-borne pathogen associated with public health and high economic losses. To investigate the prevalence and the characteristics of Salmonella in a pig slaughterhouse in Yangzhou, a total of 80 Salmonella isolates were isolated from 459 (17.43%) samples in 2016–2017. S. Derby (35/80, 43.75%) was the most prevalent, followed by S. Rissen (16/80, 20.00%) and S. Newlands (11/80, 13.75%). The highest rates of susceptibility were observed to cefoxitin (80/80, 100.0%) and amikacin (80/80, 100.0%), followed by aztreonam (79/80, 98.75%) and nitrofurantoin (79/80, 98.75%). The highest resistance rate was detected for tetracycline (65/80, 81.25%), followed by ampicillin (60/80, 75.00%), bactrim (55/80, 68.75%), and sulfisoxazole (54/80, 67.50%). Overall, 91.25% (73/80) of the isolates were resistant to at least one antibiotic, while 71.25% (57/80) of the isolate strains were multidrug resistant in the antimicrobial susceptibility tested. In addition, 86.36% (19/22) of the 22 antimicrobial resistance genes in the isolates were identified. Our data indicated that the resistance to certain antimicrobials was significantly associated, in part, with antimicrobial resistance genes. Furthermore, 81.25% (65/80) isolates harbored the virulence gene of mogA, of which 2 Salmonella Typhimurium isolates carried the mogA, spvB and spvC virulence genes at the same time. The results showed that swine products in the slaughterhouse were contaminated with multidrug resistant Salmonella commonly, especially some isolates carry the spv virulence genes. The virulence genes might facilitate the dissemination of the resistance genes to consumers along the production chain, suggesting the importance of controlling Salmonella during slaughter for public health.
Highlights
Salmonella has emerged as a major food-borne pathogen associated with breeding industry and public health in many countries (Eurosurveillance editorial team 2012; Majowicz et al 2010; Kasimoglu Dogru et al 2010)
We found that 81.25% (65/80) isolates at least carried the virulence gene of mogA, of which 2 Salmonella Typhimurium strains (2.50%) harbored the mogA, spvB and spvC virulence genes at the same time (Table 2). 18.75% (15/80) of the isolates did not carried any of the virulence genes
80 Salmonella isolates were recovered from 459 samples of the pig slaughterhouse, and the overall isolation rate of Salmonella spp. was 17.43%
Summary
Salmonella has emerged as a major food-borne pathogen associated with breeding industry and public health in many countries (Eurosurveillance editorial team 2012; Majowicz et al 2010; Kasimoglu Dogru et al 2010). . Li et al AMB Expr (2019) 9:210 reported that there were 134 outbreaks of food poisoning events caused by Salmonella in Guangxi from 1981 to 2003, which caused 7285 cases of salmonellosis (Chen et al 2004). Pigs are considered to be one of the most important reservoir for many serovars of Salmonella, and most human infections are attributed to consumption of contaminated pork (Eurosurveillance editorial team 2012; Li et al 2013; Vo et al 2006a). Information on the distribution of different Salmonella enterica serovars in contaminated pork is important to public health
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
