Genetic and antimicrobial resistance profiles of Salmonella spp. isolated from ducks along the slaughter line in southwestern China

Publication date: January 2020Source: Food Control, Volume 107Author(s): Xinfeng Han, Junfeng Peng, Xingai Guan, Jiakang Li, Xuelin Huang, Shuliang Liu, Yiping Wen, Qin Zhao, Xiaobo Huang, Qigui Yan, Yong Huang, Sanjie Cao, Rui Wu, Xiaoping Ma, Likou ZouAbstractThe prevalence and diversity of Salmonella spp. was investigated along the duck slaughter line in Sichuan Province of China from May 2016 to July 2017. A total of 156 Salmonella isolates were recovered out of 523 samples with an overall prevalence of 27.3%, and high prevalence was observed in caecal samples (43.5%) and carcasses after defeathering (27.0%). Eleven different serotypes were confirmed, among which S. Indiana, S. Newlands and S. Newport were commonly observed serotypes. Resistance was most frequently observed against nalidixic acid (94.2%), followed by ampicillin (59.6%), tetracycline (51.3%) and trimethoprim/sulfisoxazole (46.2%) with a medium resistance level. Resistance to ciprofloxacin (27.6%), minocycline (20.5%) and kanamycin (19.2%) was less commonly detected. Among the Salmonella isolates, 98.1% of the strains were resistant to at least one antimicrobial agent and 63.5% of the isolates were classified as multidrug resistant (MDR). The top five virulence-associated genes were ssaQ (94.2%), avrA (92.3%), mgtC (92.3%), bcfC (87.2%) and siiD (84.6%). All of the Salmonella isolates harbored at least one virulence-associated gene, and 142 (91.0%) isolates co-harbored at least five virulence-associated gen...
Source: Food Control - Category: Food Science Source Type: research