Field Station for Epidemiology, University of Veterinary Medicine Hannover Foundation, Buescheler Street 9, 49456 Bakum, Germany.
Vet Rec. 2010 Feb 13;166(7):194-8. doi: 10.1136/vr.b4757.
The occurrence of Mycoplasma hyopneumoniae infections in young pigs was surveyed in a retrospective study of 1122 datasets obtained from routine diagnostics where either suckling or nursery pigs were examined for M hyopneumoniae in lung tissue. Findings were correlated with the presence of lung lesions, detection of other respiratory pathogens, vaccination history and parameters describing the herd of origin. The prevalence of M hyopneumoniae in lung tissue from 201 suckling pigs was 2.0 per cent and, therefore, significantly lower than in lung tissue from 921 nursery pigs, which was 9.3 per cent. Previous use of antimicrobials and the vital status of the pigs when delivered for postmortem examination did not influence the detection of M hyopneumoniae infection. The presence of the porcine reproductive and respiratory syndrome virus (PRRSV)-EU genotype, Pasteurella multocida, Haemophilus parasuis, Mycoplasma hyorhinis or Streptococcus suis was correlated with a higher probability of also finding M hyopneumoniae. The history of vaccination, the time of the first or second application, and the type of vaccine (one- versus two-shot) did not influence the detection of M hyopneumoniae. A correlation between the type of herd and the presence of M hyopneumoniae was statistically insignificant and no effect of farrowing rhythm could be confirmed.
在一项回顾性研究中，对从常规诊断中获得的 1122 组数据进行了调查，这些数据来自对仔猪或保育猪进行肺组织支原体肺炎感染检查的样本。研究结果与肺部病变的存在、其他呼吸道病原体的检测、疫苗接种史以及描述原群的参数相关。201 头仔猪肺组织中支原体肺炎的检出率为 2.0%，因此明显低于 921 头保育猪的检出率 9.3%。在进行剖检时，猪只生前使用抗生素的情况和死活状态不影响支原体肺炎感染的检测。猪繁殖与呼吸综合征病毒（PRRSV）-EU 基因型、多杀性巴氏杆菌、副猪嗜血杆菌、猪鼻支原体或猪链球菌的存在与更有可能发现支原体肺炎的情况相关。疫苗接种史、首次或第二次接种的时间以及疫苗类型（单次或两次注射）不影响支原体肺炎的检测。畜群类型与支原体肺炎存在之间的相关性在统计学上不显著，也无法证实分娩节律的影响。
