Oastler Claire E, Nichols Christopher, Newton Kate, Cawthraw Shaun, Gosling Rebecca J, Martelli Francesca, Wales Andrew D, Davies Robert H
Department of Bacteriology, Animal and Plant Health Agency (APHA - Weybridge), Addlestone, UK.
Department of Pathology and Infectious Diseases, School of Veterinary Medicine, University of Surrey, Guildford, UK.
Zoonoses Public Health. 2022 Aug;69(5):487-498. doi: 10.1111/zph.12938. Epub 2022 Mar 19.
Salmonella can enter hatcheries via contaminated eggs and other breaches of biosecurity. The study examined the prevalence and distribution of Salmonella in commercial hatcheries and assessed the effects of providing advice on Salmonella control. Intensive swab sampling was performed throughout 23 broiler hatcheries in Great Britain (GB). Swabs were cultured using a modified ISO6579:2017 method. After each visit, tailored advice on biosecurity and cleaning and disinfection procedures was provided to the hatchery managers. Repeat sampling was carried out in 10 of the 23 hatcheries. Salmonella prevalence ranged between 0% and 33.5%, with the chick handling areas, hatcher areas, macerator area, tray wash/storage areas, external areas and other waste handling areas being more contaminated than the setter areas. Salmonella Senftenberg and Salmonella 13,23:i:- were the most commonly isolated serovars. There was a reduction in Salmonella prevalence at the second visit in eight out of 10 premises, but prevalence values had increased again in all of the improved hatcheries that were visited a third time. One hatchery harboured a difficult-to-control resident Salmonella 13,23:i:- strain and was visited six times; by the final visit, Salmonella prevalence was 2.3%, reduced from a high of 23.1%. In conclusion, the study found low-level Salmonella contamination in some GB broiler hatcheries, with certain hatcheries being more severely affected. Furthermore, it was shown that Salmonella typically is difficult to eradicate from contaminated hatcheries, but substantial reductions in prevalence are possible with improvements to biosecurity, cleaning and disinfection.
沙门氏菌可通过受污染的鸡蛋和其他生物安全漏洞进入孵化场。该研究调查了商业孵化场中沙门氏菌的流行情况和分布，并评估了提供沙门氏菌控制建议的效果。在英国的23个肉鸡孵化场进行了密集拭子采样。拭子采用改良的ISO6579:2017方法进行培养。每次访问后，都会向孵化场管理人员提供关于生物安全以及清洁和消毒程序的定制建议。在23个孵化场中的10个进行了重复采样。沙门氏菌的流行率在0%至33.5%之间，雏鸡处理区、出雏区、绞碎机区、托盘清洗/储存区、外部区域和其他废物处理区的污染程度高于孵化区。森夫滕贝格沙门氏菌和13,23:i:-沙门氏菌是最常分离出的血清型。10个场所中有8个在第二次访问时沙门氏菌流行率有所下降，但在第三次访问的所有改进后的孵化场中，流行率值又再次上升。一个孵化场存在一种难以控制的常驻13,23:i:-沙门氏菌菌株，共进行了6次访问；到最后一次访问时，沙门氏菌流行率从23.1%的高位降至2.3%。总之，该研究发现英国一些肉鸡孵化场存在低水平的沙门氏菌污染，某些孵化场受影响更为严重。此外，研究表明，沙门氏菌通常很难从受污染的孵化场中根除，但通过改善生物安全措施、清洁和消毒，流行率有可能大幅降低。
