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众所周知,乙脑病例发生具有高度散发的特点,但很少有人对这一特点进行定量分析。为此我们共搜集了湖南省10个乙脑高发县,1988年至1990年的全部乙脑疫情卡片1686张,利用计算机做了统计分析,结果见表。其中,一个村三年来发生乙脑不超过2例的村庄占88.79%,而在5例及以上的村庄仅占1.39%,进一步分析表明,三年来只有一年发病的村有925个,占81.93%,连续有两年发病的村有77个占6.82%,隔年发病的村有107个占(?).47%,连续三年都有发病的村仅有20个,占1.77%。上述分析表明,即使在湖南乙脑高发县也具有高度散发的特点。
It is well-known that the occurrence of Japanese encephalitis cases is characterized by high levels of emanation, but few people have done quantitative analysis of this feature. To this end, we have collected a total of 16 high-incidence counties in Hunan Province, 10 JE counties, from 1988 to 1990, with a total of 1 866 JE epidemic cards, using a computer for statistical analysis. The results are shown in the table. Among them, 88.79% of the villages did not have JE in 2 cases in a village in three years, while only 1.39% of the villages in 5 cases or above. Further analysis showed that in the past three years there were 925 villages, accounting for 81.93 77% of the villages with incidence of disease in two consecutive years accounted for 6.82%, while 107 villages accounted for 107% of the incidence in the following year, accounting for 47%. Only 20 villages were infected in three consecutive years, accounting for 1.77%. The above analysis shows that even in high incidence of jungle in Hunan Province also has a high degree of emission characteristics.