Yu C-Y, Chu C, Chou S-J, Chao M-R, Yeh C-M, Lo D-Y, Su Y-C, Horng Y-M, Weng B-C, Tsay J-G, Huang K-C
Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan.
Poult Sci. 2008 Aug;87(8):1544-9. doi: 10.3382/ps.2008-00018.
Nontyphoid Salmonella have a broad host range in poultry and mammals, and serovar Typhimurium is a threat to public health. In this study, normal and sick ducks and geese were collected from 12 farms in Taiwan to investigate the age-associated infection of Salmonella and Salmonella Typhimurium in Roman geese (Anser anser domesticus) and Pekin ducks (Anas platyrhynchos domesticus). In normal birds, the prevalence of Salmonella differed between species, and with age [e.g., 1-wk group, 37.5% (30/80) for ducks and 5.2% (6/116) for goslings (P < 0.05) vs. 4-wk group, 1% (1/96) for ducks and 12.1% (21/174) for geese]. Salmonella Typhimurium was identified from the visceral organs of moribund young geese suffering with colibacillosis and riemerellosis isolated from 2 goose farms (farm A and B, respectively). At farm B, 22.9% (27/118) of 4-wk geese with diarrhea were Salmonella Typhimurium-positive compared with 4.6% (8/174) of 4-wk normal geese. All Salmonella Typhimurium strains except one harbored a 94.7-kb virulence plasmid. Subcutaneous injection of Salmonella Typhimurium isolate 91NGL1 resulted in different clinical signs and pathogenesis between ducks and geese. In addition, the mean infectivity dose ratios of ducks to geese were 3.2 and 85.0 for 4- and 12-d birds, respectively, suggesting that goslings were more susceptible to Salmonella Typhimurium and resistance to Salmonella Typhimurium increased with age, especially for ducks. Therefore, Salmonella Typhimurium infection should be more common in goose farms than in duck farms, especially in the younger birds.
非伤寒沙门氏菌在家禽和哺乳动物中有广泛的宿主范围，鼠伤寒血清型沙门氏菌对公共卫生构成威胁。在本研究中，从台湾的12个养殖场收集了正常和患病的鸭和鹅，以调查罗曼鹅（家鹅）和北京鸭（家鸭）中沙门氏菌和鼠伤寒沙门氏菌的年龄相关感染情况。在正常禽类中，沙门氏菌的流行率因物种和年龄而异[例如，1周龄组，鸭为37.5%（30/80），雏鹅为5.2%（6/116）（P<0.05）；而4周龄组，鸭为1%（1/96），鹅为12.1%（21/174）]。从分别来自2个养鹅场（A场和B场）的患有大肠杆菌病和里氏杆菌病的濒死幼鹅的内脏器官中鉴定出鼠伤寒沙门氏菌。在B场，4周龄腹泻鹅中有22.9%（27/118）鼠伤寒沙门氏菌呈阳性，而4周龄正常鹅中这一比例为4.6%（8/174）。除一株外，所有鼠伤寒沙门氏菌菌株都携带一个94.7 kb的毒力质粒。皮下注射鼠伤寒沙门氏菌分离株91NGL1导致鸭和鹅出现不同的临床症状和发病机制。此外，4日龄和12日龄禽类鸭与鹅的平均感染剂量比分别为3.2和85.0，这表明雏鹅对鼠伤寒沙门氏菌更易感，并且对鼠伤寒沙门氏菌的抵抗力随年龄增加，尤其是鸭。因此，鼠伤寒沙门氏菌感染在养鹅场应比养鸭场更常见，尤其是在幼禽中。
