Survey of Salmonella serotypes shed in feces of beef cows and their antimicrobial susceptibility patterns
Survey of Salmonella serotypes shed in feces of beef cows and their antimicrobial susceptibility patterns
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DOI：
10.4315/0362-028x-63.12.1648
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发表时间：
2000-12-01
影响因子：
2
通讯作者：
Ferris, KE
中科院分区：
文献类型：
--
作者：
Dargatz, DA;Fedorka-Cray, PJ;Ferris, KE
作为美国肉牛犊行业健康和管理国家研究的一部分，对牛犊作业中沙门氏菌的流行情况进行了研究，并作为国家动物健康监测系统的一部分进行了研究。在这项研究中，沙门氏菌的流行。测定了粪便中的排泄量。共采集了 187 个肉牛犊养殖场的 5,049 个粪便样本，每个养殖场均曾去过一次。每次操作收集的粪便样本数量是根据牛群规模预先确定的。从 11.2%（187 次操作中的 21 次）收集的 1 个或多个粪便样本中检出沙门氏菌。从 1.4%（5,049 个样本中的 70 个）中回收到了代表 22 种血清型的 78 种沙门氏菌。通过一次操作从八个样本中回收了多种血清型。五种最常见的血清型是奥拉宁堡沙门氏菌（占分离株的 21.8%）和塞罗沙门氏菌（21.8%），其次是阿纳图姆沙门氏菌（10.3%）、布雷德尼沙门氏菌（9.0%）和姆班达卡沙门氏菌（5.1%）。最常见的血清群是 C-1 (33.3%)、K (21.8%)、B (16.7%) 和 E (15.4%)。尽管粪便样本中沙门氏菌的回收率非常低，但分别有 43.6%（78 例中的 34 例）和 38.5%（78 例中的 30 例）的分离株属于来自有临床疾病症状的牛或从人类中分离出的 10 种最常见血清型。大多数分离株（78 株中的 50 株；64.1%）是从两次手术的粪便样本中回收的。所有分离株均经过 17 种抗菌药物耐药性筛查，其中 87.2%（78 株中的 68 株）对所有抗菌药物敏感。耐药菌株最常见的是对链霉素 (n = 9) 和/或磺胺甲恶唑 (n = 9) 耐药。九个分离株表现出多重（大于或等于 2 个抗菌药物）耐药性，最常见的是链霉素和磺胺甲恶唑 (n = 6)。
Salmonella prevalence on cow-calf operations was studied as a part of a national study of health and management of the U.S. beef cow-calf industry and was conducted as part of the National Animal Health Monitoring System. Within this study, the prevalence of Salmonella spp. shed in feces was determined. A total of 5,049 fecal samples were collected from 187 beef cow-calf operations each visited on a single occasion. The number of fecal samples collected per operation was predetermined based on herd size. Salmonellae were recovered from 1 or more fecal samples collected on 11.2% (21 of 187) of the operations. Overall 78 salmonellae representing 22 serotypes were recovered from 1.4% (70 of 5,049) of samples. Multiple serotypes were recovered from eight samples from a single operation. The five most common serotypes were Salmonella Oranienburg (21.8% of isolates), and Salmonella Cerro (21.8%), followed by Salmonella Anatum (10.3%), Salmonella Bredeney (9.0%), and Salmonella Mbandaka (5.1%). The most common serogroups identified were C-1 (33.3%), K (21.8%), B (16.7%), and E (15.4%). Even though the recovery rate of salmonellae from fecal samples was very low, 43.6% (34 of 78) and 38.5% (30 of 78) of the isolates were among the 10 most common serotypes from cattle with clinical signs of disease or isolated from humans, respectively. The majority of the isolates (50 of 78; 64.1%) were recovered from fecal samples from two operations. All isolates were screened for resistance to a panel of 17 antimicrobics, and 87.2% (68 of 78) were susceptible to all of the antimicrobics. The resistant isolates were most commonly resistant to streptomycin (n = 9) and/or sulfamethoxazole (n = 9). Nine isolates showed multiple (greater than or equal to2 antimicrobics) resistance most commonly to streptomycin and sulfamethoxazole (n = 6).