| 钟子和,罗丕建,梁楚新.桃源县乙型脑炎病毒传播情况调查[J].Chinese journal of Epidemiology,1984,5(6):342-344 |
| 桃源县乙型脑炎病毒传播情况调查 |
| A Survey on Transmission of Japanese B Encephalitis in Tao-yuan County |
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| Abstract: |
| 桃源县1981年乙脑病毒传播情况调查结果表明：仔猪血抑抗体6月下旬转阳，7月上旬累计阳转率为100%。三带喙库蚊4月出现，6月下旬达高峰；6月份从20批成蚊中分离出4株乙脑病毒，现场最低感染率为1：325。全年共发生乙脑103例，发病率为11.9/10万，发病高峰在7月上、中旬，占全年病例总数的90%，发病集中在6岁以下儿童，平、丘区发病显著高于山区。人群发病高峰比三带喙库蚊密度高峰迟二旬，与猪的乙脑病毒感染高峰相隔20天。 |
| English Abstract: |
The investigation showed that the HI antibody of piglets started to appear in the last third of June. The cumulative positive conversion rate of piglets in the first third of July reached 100% when culex tritaeniorhynchus began to appear in April and came up to its peak in the last third of June. Four strains of encephalitis virus B were isolated from 20 pools of adult mosquitoes in June. The lowest infectivity somewhere in the field was 1:325. There were 103 total encephalitis cases that year. The morbidity was 11.9 per hundred thousand. The peak, appearing in the first two thirds of July, account for 90% of the total cases all the patients were under s x year olds. Incidence in plain and hilly areas was higher than that in mountainous areas. The maximal incidence rates appeared 20 days after the density peak of the vectors and the maximal infectivity of piglets.
The results provided some useful data for encephalitis surveillance in southern China. |
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