Tizard I R, Chauhan S S, Lai C H
J Hyg (Lond). 1977 Apr;78(2):275-82. doi: 10.1017/s0022172400056163.
The results of testing 7060 human serum specimens obtained in the Province of Ontario, Canada, were analysed for the presence of antibodies to Toxoplasma gondii. Of these samples 38% were serologically positive at a titre of 1/16 or greater. The age-specific rates climbed from 2.7% in infants between 6 months and 1 year of age, to about 50% in individuals aged 25 years or over. Variations in prevalence were noted between different areas within the province and evidence is put forward to show that an inverse relation exists between urban size and toxoplasma prevalence. Seasonal and annual variations were not shown to be significant. On the basis of a very small sample of specimens, cat ownership not appear to cause a significant increase in the risk of acquiring this infection.
对从加拿大安大略省采集的7060份人体血清样本进行检测，分析其中是否存在抗刚地弓形虫抗体。在这些样本中，38%的样本血清学检测呈阳性，滴度为1/16或更高。年龄特异性感染率从6个月至1岁婴儿的2.7%攀升至25岁及以上人群的约50%。该省内不同地区的感染率存在差异，有证据表明城市规模与弓形虫感染率呈负相关。未发现季节性和年度变化具有显著性。基于非常少量的样本，养猫似乎并不会显著增加感染这种疾病的风险。
