对猪补铁量认识的新质疑     

Peter Best  纪少丽  何叶如  舒畅 《国外畜牧学(猪与禽)》2009,29(2):14-16

较大的窝产仔数和较快的生长速度正挑战着已有数十年历史的母猪和仔猪铁饲喂量和需要量标准。  相似文献   

Variable and strain dependent colonisation of chickens by Escherichia coli O157     

La Ragione RM  Best A  Sprigings K  Liebana E  Woodward GR  Sayers AR  Woodward MJ 《Veterinary microbiology》2005,107(1-2):103-113

The prevalence of enterohaemorrhagic Escherichia coli (EHEC) O157 in poultry is considered minimal compared with other species, especially ruminants. However, deliberate inoculation studies have shown that poultry are readily and persistently infected by this organism but that the mechanism of colonisation is independent of intimin, a recognised factor in host-EHEC interactions in mammalian species, and may be dependent upon flagella. Few strains of EHEC O157 have been tested in poultry and here 1-day-old and 6-week-old chicks were inoculated with seven non-toxigenic E. coli O157 strains in separate experiments. Persistence was measured semi-quantitatively by bacteriological assessment of E. coli O157 cultured from cloacal swabs (shedding score). In the 1-day-old chick model that was monitored for 43 days, all seven strains established well after inoculation. In the 6-week-old chicken model, one strain established and gave consistently high shedding for the duration of the experiment (156 days). Whereas of the remaining six strains, two persisted for 113 days, two persisted for 43 days, one persisted for 22 days and one strain was never detected.  相似文献   

Interaction with avian cells and colonisation of specific pathogen free chicks by Shiga-toxin negative Escherichia coli O157:H7 (NCTC 12900)     

Best A  La Ragione RM  Cooley WA  O'Connor CD  Velge P  Woodward MJ 《Veterinary microbiology》2003,93(3):207-222

The prevalence of Escherichia coli O157:H7 infection in birds is low but several deliberate inoculation studies show that poultry are readily and persistently infected by this organism indicating a possible threat to public health. The mechanisms of colonisation of poultry are not understood and the aim is to establish models to study the interaction of E. coli O157:H7, at the cellular and whole animal levels. A non-toxigenic E. coli O157:H7 (NCTC 12900) was used in adherence assays with an avian epithelial cell line (Div-1) and used to inoculate 1-day-old SPF chicks. In vitro, NCTC 12900 induced micro-colonies associated with cytoskeletal arrangements and pedestal formation with intimate bacterial attachment. In the 1-day-old SPF chick, a dose of 1 x 10(5) cfu resulted in rapid and extensive colonisation of the gastrointestinal tract and transient colonisation of the liver and spleen. The number of E. coli O157:H7 organisms attained approximately 10(8) cfu/ml caecal homogenate 24h after inoculation and approximately 10(7) cfu/ml caecal homogenate was still present at day 92. Faecal shedding persisted for 169 days, ceasing 9 days after the birds came into lay and 6% of eggs were contaminated on the eggshell. Histological analysis of tissue samples from birds dosed with 1x10(7) cfu gave evidence for E. coli O157:H7 NCTC 12900 induced micro-colonies on the caecal mucosa, although evidence for attaching effacing lesions was equivocal. These models may be suitable to study those factors of E. coli O157:H7 that mediate persistent colonisation in avian species.  相似文献   

Using "data" correctly          下载免费PDF全文

Best RH 《The Canadian veterinary journal. La revue veterinaire canadienne》1997,38(6):331

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猪饲料盈利-"ω"因素     

Peter Best  郑卫川  黄琳译  仲伟静 《广东饲料》2007,16(5):21-23

肉制品商家将销售富含ω-3脂肪酸的猪肉视为商机,这种猪肉是通过让猪采食特殊日粮而生产的。尽管富含ω-3脂肪酸的食品中大部分是乳制品,但肉制品也在稳步增多。  相似文献   

Synthesis and herbicidal activity of 1,4-benzoxazin-3-one sulfonylureas     

Janet E. Anderson  Stephen Bell  Wayne M. Best  Peter F. Drygala  Keith G. Watson  Ian B. Bryan 《Pest management science》1996,46(2):131-138

A series of 1,4-benzoxazin-3-ones with a sulfonylurea group attached at either the 5 or 8 position have been synthesised and found to show moderate herbicidal activity. Similarly, a series of 1,4-benzothiazin-3-ones, including some of the related S-oxides and S-dioxides, with a sulfonylurea group linked at the 8 position, have been prepared and been found to be herbicidal. In both series of compounds many substituent variations were made but none of the compounds showed any useful crop selectivities.  相似文献   

猪的湿喂方式     

Peter Best  程宗佳 《饲料研究》2009,(10)

谷物价格一路走高,给饲料成本带来了空前的压力,在这种情况下,依靠泵和管道的生长肥育猪湿喂方式再次引起人们的关注.目前,北欧使用这种湿喂方式的养殖者数量已达到历史新高,并且这种饲喂模式已逐渐进入亚洲和欧洲市场.  相似文献   

FACTORS AFFECTING THE INSULIN CONTENT OF PANCREAS     

Haist RE  Best CH 《Science (New York, N.Y.)》1940,91(2365):410-411

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The efficacy of fenbendazole in the control of immature strongyle infections in ponies     

J L Duncan  D G McBeath  J M Best  N K Preston 《Equine veterinary journal》1977,9(3):146-149

The efficacy of fenbendazole against immature stages of Trichonema spp., Strongylus vulgaris and Strongylus edentatus was evaluated. Naturally infected 6 to 12 month old ponies were given single, oral doses of 0, 15, 30 and 60 mg/kg of body weight. A dose response relationship was noted between increasing dose levels and efficiency against larval trichonemes and migrating stages of S. vulgaris and S. edentatus. Dose levels of 30 mg/kg and higher removed 93 per cent of mucosal stages of Trichonema spp., while doses of 60 mg/kg removed 83 per cent and 89 per cent of the migrating larvae of S. vulgaris and S. edentatus respectively.  相似文献   

AN INDIRECT HAEMOLYSIS TEST (IHLT) FOR BOVINE BRUCELLOSIS   总被引：7，自引：0，他引：7  

P. Plackett B.A.  Ph.D.    G. S. Cottew M.Sc.  Susan J. Best A.A.I.M.T. 《Australian veterinary journal》1976,52(3):136-140

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