Abstract：
Antibiotic resistant Salmonella enterica are on the increase, worldwide. Given the scarcity of data, this study aimed to investigate its occurrence, virulence, and antibiotic resistance in Costa Rica\'s food chain. In total, 65 chicken meat- and 171 chicken caecal samples were collected and examined for Salmonella. High frequencies of Salmonella were found in chicken meat (58.5 %, n/N = 38/65) and poultry farms (38.0 %, n/N = 65/171). The majority of Salmonella from chicken meat (89.5 %, n/N = 34/38) and caecum samples (93.6 %, n/N = 59/63) exhibited multidrug resistance (MDR). Serovar Infantis was the most prevalent (94 %, n/N = 67/71), followed by serovars Anatum and Kentucky (3 %, n/N = 2/71). A pESI-like plasmid (92 %, n/N = 65/71) containing virulence and resistance markers was found in S. Infantis. Given the high prevalence of MDR Salmonella, this study emphasizes the need to enhance surveillance systems for foodborne pathogens and antimicrobial resistance in Costa Rica\'s food production chain.
摘要：
耐抗生素的肠道沙门氏菌正在增加，全世界。鉴于数据的稀缺性,这项研究旨在调查它的发生，毒力,哥斯达黎加食物链中的抗生素耐药性。总的来说,收集65个鸡肉和171个鸡盲肠样品并检查沙门氏菌。在鸡肉中发现了高频率的沙门氏菌(58.5%，n/N=38/65)和家禽养殖场(38.0%，n/N=65/171)。大部分沙门氏菌来自鸡肉(89.5%，n/N=34/38)和盲肠样本(93.6%，n/N=59/63)表现出多药耐药性(MDR)。婴儿血清型是最普遍的(94%，n/N=67/71)，其次是血清型阿纳图姆和肯塔基州(3%，n/N=2/71)。pESI样质粒(92%，在婴儿链球菌中发现了n/N=65/71）含有毒力和抗性标记。鉴于MDR沙门氏菌的高流行率，这项研究强调需要加强哥斯达黎加食品生产链中食源性病原体和抗菌素耐药性的监测系统。
