Department of Veterinary Public Health and Pharmacology, Faculty of Veterinary Medicine and Animal Science,University of Peradeniya,Peradeniya,Sri Lanka.
Department of Infectious Diseases and Immunology,Utrecht University,Utrecht,the Netherlands.
Epidemiol Infect. 2018 Jun;146(8):972-979. doi: 10.1017/S0950268818000894. Epub 2018 Apr 15.
Campylobacter is the primary agent of human bacterial gastroenteritis worldwide. In contrast to temperate zones, weather effects on Campylobacter prevalence in broilers under tropical conditions are under-researched. We examined the association between weather and Campylobacter prevalence in slaughtered broilers in Sri Lanka, a tropical country with weather variations led by monsoons. Each month (October 2009-July 2011), 20-30 broiler batches referring to two semi-automated slaughterhouses from five Sri Lankan provinces were tested for Campylobacter contamination and analysed in relation to temperature, humidity and rainfall. Overall prevalence was 63.8% (95% CI 59.6-67.9%, n = 542), peaking in September-November. Each 1 °C increase in monthly mean temperature up to 26 °C increased Campylobacter-positive batches by 16.4% (95% CI 0.4-35.1%). For each 10 mm increase in monthly total rainfall up to 300 mm, Campylobacter-positive batches increased significantly by 0.8% (0.1-1.5%) at 1-month lag. For each 1% increase in relative humidity up to 80% at 1- and 2-month lags, Campylobacter-positive batches increased of respectively 4.2% (1.9-6.7%) and 4.0% (1.5-6.5), and decreased by 3.6% (2.6-4.6%) and 4.0% (2.6-5.4%) for unit increases above 80%. These results suggest that even in tropical countries without marked seasons, there are weather effects possibly reflecting Campylobacter potential to colonise its preferred host and/or survive in the environment.
空肠弯曲菌是全球人类细菌性胃肠炎的主要病原体。与温带地区相比，在热带条件下肉鸡中空肠弯曲菌流行的天气影响研究较少。我们研究了斯里兰卡（一个受季风影响的热带国家，天气变化较大）屠宰肉鸡中空肠弯曲菌流行与天气之间的关系。每个月（2009 年 10 月至 2011 年 7 月），从五个斯里兰卡省的两个半自动化屠宰场抽取 20-30 批肉鸡进行空肠弯曲菌污染检测，并分析其与温度、湿度和降雨量的关系。总体流行率为 63.8%（95%CI 59.6-67.9%，n=542），高峰在 9 月至 11 月。每月平均气温每升高 1°C，空肠弯曲菌阳性批次增加 16.4%（95%CI 0.4-35.1%），直至 26°C。每月总降雨量每增加 10 毫米，直至 300 毫米，空肠弯曲菌阳性批次显著增加 0.8%（0.1-1.5%），滞后 1 个月。在 1 个月和 2 个月的滞后期，相对湿度每增加 1%，直至 80%，空肠弯曲菌阳性批次分别增加 4.2%（1.9-6.7%）和 4.0%（1.5-6.5%），而超过 80%时，空肠弯曲菌阳性批次分别减少 3.6%（2.6-4.6%）和 4.0%（2.6-5.4%）。这些结果表明，即使在没有明显季节的热带国家，也有空肠弯曲菌潜在的宿主定植和/或在环境中生存的天气影响。
