Some epidemiological characteristics of dengue fever and dengue hemorrhagic fever in Nam Hµ province during 1991 - 2000

ABSTRACT

Result of the research showed that dengue fever/dengue hemorrhagic fever (DF/DHF) was endemic disease in Nam Hµ province with following characteristics low incidence (16.3/100,000 persons), sporadicalness, persistence and unpredictable. All four types of dengue virus were isolated and they were pathogens of DF/DHF endemic in this province. Two species of mosquito vector were collected, and Aedes aegypti was a major vector in transmitting dengue virus. Breeding sites of Aedes aegypti were investigated with up to seven different kinds of water body. It was determined that the key breeding places of the vector for both urban and rural area were concrete tanks, jars, wells and discarded objects. It was in first time documented the breeding site of Aedes aegypti and added into checklist for Aedes larvae in Northern part of Vietnam