Medema G, Schets C
Laboratory of Water and Food Microbiology, National Institute of Public Health and Environmental Protection, Bilthoven, The Netherlands.
Zentralbl Hyg Umweltmed. 1993 Jul;194(4):398-404.
Plesiomonas shigelloides is an autochthonous inhabitant of freshwater and has been associated with several waterborne outbreaks of acute gastro-enteritis. One of these outbreaks occurred in the summer of 1990, at a recreational beach near Amsterdam. In the summer of 1991, a survey was conducted to examine the presence of P. shigelloides in recreational fresh waters and marine water in the Netherlands. During the survey became clear that the specificity of current methods for the isolation and enumeration of P. shigelloides in water is low and requires extensive confirmation to obtain accurate data. P. shigelloides was ubiquitously present (30 of 42 samples positive) in fresh waters, but absent in sea water. Geometric mean Plesiomonas densities ranged from 140-340 per 100 ml; the range for individual positive samples was 33-840 per 100 ml. The Plesiomonas density was significantly correlated with index parameters for the trophic state (Secchi depth and chlorophyll A) and for faecal pollution (Escherichia coli). In winter, only 1 of 8 sites harboured P. shigelloides and in low numbers (4.4 per 100 ml). The ubiquitous presence of P. shigelloides in freshwater in the recreational season may result in cases of gastro-enteritis among bathers.
类志贺邻单胞菌是淡水的本地居民，与几起水源性急性肠胃炎暴发有关。其中一次暴发发生在1990年夏天，地点是阿姆斯特丹附近的一个休闲海滩。1991年夏天，进行了一项调查，以检测荷兰休闲淡水和海水中类志贺邻单胞菌的存在情况。在调查过程中发现，目前用于水中类志贺邻单胞菌分离和计数的方法特异性较低，需要大量的确认工作才能获得准确数据。类志贺邻单胞菌在淡水中普遍存在（42个样本中有30个呈阳性），但在海水中不存在。类志贺邻单胞菌的几何平均密度为每100毫升140 - 340个；单个阳性样本的范围是每100毫升33 - 840个。类志贺邻单胞菌密度与营养状态指标（透明度和叶绿素A）以及粪便污染指标（大肠杆菌）显著相关。在冬季，8个采样点中只有1个含有类志贺邻单胞菌，且数量较少（每100毫升4.4个）。休闲季节淡水中类志贺邻单胞菌的普遍存在可能导致游泳者患肠胃炎。
