Rimhanen-Finne Ruska, Hänninen Marja-Liisa, Vuento Risto, Laine Janne, Jokiranta T Sakari, Snellman Marja, Pitkänen Tarja, Miettinen Ilkka, Kuusi Markku
National Institute for Health and Welfare, Helsinki, Finland.
Scand J Infect Dis. 2010 Aug;42(8):613-9. doi: 10.3109/00365541003774608.
The severe sewage contamination of a drinking water distribution network affected inhabitants in the town of Nokia, Finland in November 2007-February 2008. One of the pathogens found in patient and environmental samples was Giardia, which for the first time was detected as the causal agent of an outbreak in Finland. To describe the existence and the importance of Giardia infections related to this outbreak, we described characteristics of the giardiasis cases and calculated the incidence of giardiasis as well as the frequency of positive Giardia tests both before and during the outbreak. Persons reported to the Finnish Infectious Disease Registry (FIDR) with Giardia infections were interviewed. The number of persons tested for Giardia was obtained from the Centre for Laboratory Medicine at the Tampere University Hospital. The investigations provided strong evidence that Giardia infections in Nokia resulted from the contaminated water. The proportion of persons testing positive for Giardia and the incidence of giardiasis multiplied during the outbreak. To improve outbreak management, national guidelines on testing environmental samples for Giardia should be developed, and further resources should be allocated to both clinical and environmental laboratories that perform parasitological analyses.
2007年11月至2008年2月，芬兰诺基亚镇饮用水配水网络受到严重污水污染，影响了当地居民。在患者和环境样本中发现的病原体之一是贾第虫，这是芬兰首次检测到其作为疫情的致病因子。为了描述与此次疫情相关的贾第虫感染情况及其重要性，我们描述了贾第虫病病例的特征，并计算了疫情爆发前和爆发期间贾第虫病的发病率以及贾第虫检测呈阳性的频率。对向芬兰传染病登记处（FIDR）报告的贾第虫感染患者进行了访谈。检测贾第虫的人数来自坦佩雷大学医院的检验医学中心。调查提供了有力证据，证明诺基亚的贾第虫感染是由受污染的水引起的。疫情期间，贾第虫检测呈阳性的人数比例和贾第虫病发病率成倍增加。为了改善疫情管理，应制定关于检测环境样本中贾第虫的国家指南，并应向进行寄生虫学分析的临床和环境实验室分配更多资源。
