一起细菌性痢疾水型爆发的调查分析

Investigation of a Water-borne Outbreak of Bacillary Dysentery

1998年 1 0月下旬 ,安徽省石台县城关镇发生一起细菌性痢疾的水型爆发。致病菌为宋内氏志贺氏痢疾杆菌 ;爆发的原因是由于县自来水厂的水源水受到污染 ,自来水厂未按要求消毒所致 ;病人的发生是因直接饮用和通过洗手、洗物等间接方式使用、接触被污染了的自来水厂的水。并简要讨论了水、干旱等自然因素对痢疾发病的影响及防治对策。

A number of agnogenic fever and diarrhea patients occurred in Shitai county seat during the period from Oct.20 to Oct.26, 1998. The event was confirmed as a water-borne outbreak of bacillary dysentery by epidemiological, clinical and etiology investigation. Pathogen was S. sonnei. The cause of outbreak was that water source of waterworks was polluted and that the water of waterworks was not disinfected in accordance with national legal requirements. Patients got infection by drinking polluted water directly or washing hands??washing foods using polluted water indirectly . Effect of natural factors, such as flood and drought, on bacillary dysentery incidence and countermeasures were discussed in the paper briefly.