关键词: 登革热, 登革Ⅰ, Ⅳ型病毒, 监测能力

Abstract: From April to November in 1991, There are 258 Dengue fever cases reporied in Guang zhon. The morbidity was 4.35 per 100000 population, three ecases died, the mortality is 1.17 percent. In the pre-prevalence stage, is mainly sporatic cases patients who affected with Dengue four (Ⅳ) sero type virus, but in the postprevalence stage is mainly Dengue Ⅰ sero type. There are 51 Dengue virus strains were isolated, of which 45 strains were sero-type Ⅰ. and 6 strains were sero-type four (Ⅳ).complement test titers for sero from recovery patients were four times as higher than that of acute-phase, iucluding in 60 cases of Dengue Ⅰ sero-type, and 14 cases of Dengue four serotype. Through the epidmeiological observations, it generally showed that the prevantive monitoring system used is very effective measures for control against Dengue fever.