Martelli F, Caprioli A, Di Bartolo I, Cibin V, Pezzotti G, Ruggeri F M, Ostanello F
Dipartimento di Sanità Pubblica Veterinaria e Patologia Animale, Facoltà di Medicina Veterinaria, Università di Bologna, Ozzano Emilia, Italy.
J Vet Med B Infect Dis Vet Public Health. 2006 Jun;53(5):234-8. doi: 10.1111/j.1439-0450.2006.00949.x.
Anellovirus is a recently created, floating genus of viruses. Torque teno virus (TTV), the type species in the genus, was first discovered in a human patient with a post-transfusion hepatitis of unknown aetiology. Recently, TTV genetically related to but distinct from those discovered in humans have also been found in animals, including pigs. The aims of this study were to estimate the prevalence of swine TTV in Italian pig herds and some risk factors possibly associated with this infection. Serum samples from 179 healthy pigs from 10 farms located in north-central Italy were tested by polymerase chain reaction for the presence of swine TTV DNA. Viral DNA was found in the sera of 43 pigs (24.0%), coming from eight of the 10 farms examined. Prevalence was significantly higher in finishing herds (40.1%) than in farrow-to-finish herds (11.0%) and did not depend on the size of the herd. Within the finishing herds the prevalence was significantly higher in weaners (57.4%) than in fatteners (22.9%), but this difference was not observed in farrow-to-finish herds. No relationship was observed between the prevalence of swine TTV and the implementation of some general hygiene practices and biosecurity procedures within the herds.
环曲病毒是最近新设立的一类漂浮病毒。该属的模式种——细小病毒（TTV）最初是在一名病因不明的输血后肝炎患者中发现的。最近，在包括猪在内的动物中也发现了与人类中发现的TTV基因相关但不同的TTV。本研究的目的是评估意大利猪群中猪TTV的流行率以及一些可能与这种感染相关的风险因素。对来自意大利中北部10个农场的179头健康猪的血清样本进行聚合酶链反应检测，以确定是否存在猪TTV DNA。在接受检测的10个农场中的8个农场的43头猪（24.0%）的血清中发现了病毒DNA。育肥猪群中的流行率（40.1%）显著高于从产仔到育肥猪群（11.0%），且与猪群规模无关。在育肥猪群中，断奶仔猪的流行率（57.4%）显著高于育肥猪（22.9%），但在从产仔到育肥猪群中未观察到这种差异。未观察到猪TTV的流行率与猪群中一些一般卫生措施和生物安全程序的实施之间存在关联。
