山东省疟疾基本消灭后鲁南滨湖地区疟疾病灶点的分布及其传播作用的调查研究

鲁南滨湖地区微山县1986～1991年共发生疟疾41例,分布在16个乡镇的32个自然村。其中输入病例1986～1989年仅1例,1990～1991年5例;当地感染病例1986～1987年19例,1988～1989年未发现,1990～1991年5例;不明病例1986～1988年与1989～1991年分别为6例和5例。1989～1991年有病灶点11个,其中外源性灶点5个,内源性灶点1个,来源不明灶点5个。在调查的10个灶点中,活动或有潜在活动的灶点共7个。调查显示,当地疟疾灶点呈广泛散在,近年输入性病例有明显增加,当地感染病例也有回升趋势,多数灶点有传播或潜在传播存在,在当前情况下,不应放松对当地疟疾的监测。

STUDY ON THE TRANSMISSION ACTIVITY AND DISTRIBUTION OF MALARIA FOCI AFTER BASIC ELIMINATION OF MALARIA IN SOUTHREN SHANDONG

In WeiShan county around the Weishan Lake in southern Shandong Province a total of 41 malaria cases was found during 1986~1991, distributing over 32 villages in 16 townships, in- cluding 1 case detected during 1986~1989 and 5 cases during 1990~1991 of imported cases, 19 cases detected during 1986~1987 and 5 cases during 1990~1991 of local infected cases, 6 and 5 of cryptic cases found during 1986~1988 and during 1989~1991 respectively. During 1989 1991 existed total 11 disease foci. Of them 5 were exogenous, 1 was endogenous, and 5 were un- determined. Of 10 disease foci inverstigated, 7 were active or potential active. The results showed a dispersive, sporadic feature of local malarial foci, observous increase of imported cases in recent years, upgrade tendency and transmission or potential transmission in most foci, there- fore, the survallance on local malaria should not be negligent at present.