【摘要】 四川垫江县１９９１年１～８月发生一起发病率为３５１．６９／１０万的甲型肝炎流行，发病的乡、镇中，发病率在５００～１６００／１０万的６个，２００～４００／１０万的１２个，９９～１９９／１０万的２６个；发病率以小学生、干部职员为高，分别为１２８４．５／１０万、１２１０．２／１０万，５～２９岁人群发病占总发病的７６．４１％；病例呈逐渐积累过程，高峰出现迟缓；５种传播因素调查分析，肝炎接触史与肝炎发病有关（Ｘ２＝７７７．１４，Ｐ＜０．００１）。自然灾害──干旱，是促进该次流行强度大、面广的主导因素，灾害冲击前、冲击中的防制措施不力是流行居高不下的重要原因。更多还原

【Abstract】 Viral hepatitis spread throngh Dianjiang county Sichuan Province from January to Auguest in 1991. The cases added up to 2,840 and the incidence was 351.69 persons per 100 ,000. The cases were dispersed out 381 villages of 44 towns, and 221 govenments, schools, factories. The incidence in six towns was 500 to 1,600 per 100,000, 12 towns was 200 to 400 per 100,000, 26 towns 99 to 199 per 100,000. The case of emitting and breafing ont were 83. 42% and 16.58%. The highest incidence existed in school children(1,284 per 100,000), officers and staff(1,210 per 100,000). 76. 41 percents of the total cases were come on between the ages of 5 and 29 years. The case was an accamulating course and the summit presented slowly. According to the validation of epidemiology, clinic and serology, it was a drought that caused phyroid hepatitis prevalent, mainly by contagion-transmission. Natural calamity, ──drought,was the principal factor that stimulated phyroid hepatitis prevalent strongly and wide. At the same time these were the important factors to keep the spread highly: plpulation flow, the wide existence of contagion, which did not get correct management, and the powerless measure taken before or during the calamity’s attack.更多还原