Infectious Diseases and Epidemiology Unit, Department of Animal Health, Faculty of Veterinary Science, University of León, León, Spain.
Res Vet Sci. 2013 Oct;95(2):334-42. doi: 10.1016/j.rvsc.2013.04.001. Epub 2013 Apr 29.
The objective of this paper is to analyse in further detail the Danish results of the EFSA baseline studies in slaughter pigs and breeding herds, and compare them with the results obtained in (1) the pre-implementation study that was carried out to establish the initial prevalence values in fattening herds as part of the Danish Salmonella control programme, and (2) the study performed four years later in breeding and finishing herds to obtain information about the prevalence in breeding farms and the status of the finishers after the first years of the National Salmonella Control Programme. In the slaughter pigs Salmonella was detected in a 7.4% of 1218 ileocaecal lymph nodes and on 3.2% of 438 carcasses examined. Among the breeding herds examined by floor faecal or swab samples 122 of 298 (40.9%) were positive in at least one of the ten samples collected. The most prevalent serotypes were Salmonella Typhimurium in finishers and Salmonella Derby in breeding herds while the most prevalent phage types of the S. Typhimurium isolates were DT 12 and DT 120. The antimicrobial resistance analysis yielded a 35.2% of the isolates from the slaughter pigs resistant to one or more antimicrobials while 19.3% were resistant to four or more antimicrobials. A significantly higher percentage of resistance to antimicrobials was found in the S. Typhimurium isolates (χ(2)=4.72, p=0.029), where 42.9% presented resistance to one or more compounds. In breeding herds, just S. Typhimurium and S. 4,5],12:i: - isolates were tested. As many as 56.8% of the S. Typhimurium-like strains positive breeding farms had resistant strains, while 27% had multidrug resistant strains. The distribution of the isolates in regions showed that S. Derby is at present the predominant serotype in breeding farms from most of the regions of the country.
本文的目的是进一步分析 EFSA 在丹麦屠宰猪和繁殖群中的基准研究结果，并将其与以下结果进行比较：(1) 在丹麦沙门氏菌控制计划中，为确定育肥群的初始流行率而进行的实施前研究中获得的结果，以及 (2) 实施该计划四年后，在繁殖和育肥群中进行的研究，以获取有关繁殖场流行率和育肥场在国家沙门氏菌控制计划的最初几年后的状况的信息。在屠宰猪中，1218 个回肠淋巴结中有 7.4%检测到沙门氏菌，438 个胴体中有 3.2%检测到沙门氏菌。在通过地板粪便或拭子样本检查的繁殖群中，122 个（40.9%）在至少一个采集的十个样本中呈阳性。最流行的血清型是育肥猪中的肠炎沙门氏菌和繁殖群中的德尔塔沙门氏菌，而肠炎沙门氏菌分离株的最流行噬菌体型是 DT12 和 DT120。抗菌药物耐药性分析显示，屠宰猪分离株中有 35.2%对一种或多种抗菌药物耐药，19.3%对四种或更多种抗菌药物耐药。肠炎沙门氏菌分离株中发现抗菌药物耐药性的百分比显著更高（χ²=4.72，p=0.029），其中 42.9%对一种或多种化合物耐药。在繁殖群中，仅测试了肠炎沙门氏菌和 S.4,5],12:i:- 分离株。在阳性繁殖场的肠炎沙门氏菌样菌株中，多达 56.8%的菌株具有耐药菌株，而 27%的菌株具有多药耐药菌株。分离株在地区的分布表明，德尔塔沙门氏菌目前是该国大部分地区繁殖场的主要血清型。
