Prevalence and Antimicrobial Resistance of Salmonella Serovars in Conventional and Organic Chickens from Louisiana Retail Stores
Prevalence and Antimicrobial Resistance of Salmonella Serovars in Conventional and Organic Chickens from Louisiana Retail Stores
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DOI：
10.4315/0362-028x-72.6.1165
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发表时间：
2009-06-01
影响因子：
2
通讯作者：
Ge, Beilei
中科院分区：
文献类型：
--
作者：
Lestari, Shofiyah Ika;Han, Feifei;Ge, Beilei
在这一年的调查，从2006年10月至2007年9月，我们分离和表征126沙门氏菌分离物从常规饲养（n = 141）和有机饲养（如果= 53）鸡尸体从27个零售店在巴吞鲁日，路易斯安那州。沙门氏菌分离出22%的传统和20.8%的有机鸡样品。确定了8种沙门氏菌血清型;主要包括肯塔基州、哈达尔和肠炎。绝大多数分离物在同一鸡样本具有相同的脉冲场凝胶模式。所有沙门氏菌分离株对阿米卡星、头孢曲松和环丙沙星敏感，但对喹诺酮类（7.1%）或超广谱头孢菌素类（45.2%）的敏感性降低。52.4%的沙门氏菌分离株对多种抗菌药物（两种或两种以上）耐药。沙门氏菌血清型之间的抗生素耐药性差异很大，也取决于它们被回收的鸡的类型。从有机鸡中分离的肯塔基州沙门氏菌对11种抗菌剂敏感，而从传统鸡中分离的沙门氏菌仅对4种抗菌剂敏感。来自传统鸡的三株肯塔基州沙门氏菌分离株具有多药耐药表型MDR-AmpC。本研究的结果提供了该地区零售鸡沙门氏菌的患病率和耐药性的基线数据，并强调需要实施有效的控制措施，以减少沙门氏菌污染和常规和有机家禽产品中耐药性沙门氏菌的水平。随着时间的推移，需要进行更大样本量的进一步研究，以更好地监测和评估零售鸡中沙门氏菌血清型的流行趋势和抗菌药物敏感性。
In this I-year survey from October 2006 to September 2007, we isolated and characterized 126 Salmonella isolates from conventionally raised (n = 141) and organically raised (if = 53) chicken carcasses obtained from 27 retail stores in Baton Rouge, Louisiana. Salmonella was isolated from 22% of conventional and from 20.8% of organic chicken samples. Eight Salmonella serovars were identified; predominant ones included Kentucky, Hadar, and Enteritidis. The vast majority of isolates within the same chicken sample possessed the same pulsed-field gel pattern. All Salmonella isolates Were Susceptible to amikacin, ceftriaxone, and ciprofloxacin; however, decreased susceptibility to quinolones (7.1%) or extended-spectrum cephalosporins (45.2%) was observed. Resistance to multiple antimicrobials (two or more) was found among 52.4% of the Salmonella isolates. Antimicrobial resistance profiles differed greatly among Salmonella serovars and also depended on the type of chicken from which they were recovered. Salmonella Kentucky isolates from organic chicken samples were Susceptible to I I of the antimicrobials tested, whereas those from conventional chickens were only susceptible to 4 antimicrobials. Three Salmonella Kentucky isolates from conventional chickens possessed multidrug resistance phenotype MDR-AmpC. Results of this study provide baseline data oil both prevalence and antimicrobial resistance of Salmonella in retail chickens in this region and emphasize the need for implementing effective control measures to reduce Salmonella contamination and the levels of antimicrobial-resistant Salmonella in both conventionally and organically raised poultry products. Further studies involving larger sample sizes over time are needed to better monitor and assess the trend of prevalence and antimicrobial Susceptibility among Salmonella serovars in retail chickens.