ABSTRACT
In 2 epidemics of Dengue haemorrhagic fever in Bien Hoa, the predominant serotypes of dengue virus in the year 2000 and 2003 were Dengue-4 and Dengue-1, respectively. The number of clinical cases of children under 15 years old diagnosed as viral infection and unknown fever (n=1653), were higher than those diagnosed as Dengue fever/Dengue haemorrhagic fever (DF/DHF) (n=1122). The number of Dengue virus isolated from patients with viral infection and unknown fever (n=102) was higher than those isolated from DF/DHF cases (n=85). The number of Dengue positive MAC-ELISA cases in 2 years was 870 corresponding to a positive rate of 30.27%
Subject(s)
Dengue , Epidemiology , Severe DengueABSTRACT
This report described a program undertaken with the collaboration of the CDC (Colorado, USA) known as "Active, laboratory-based surveillance for dengue infection in Bien Hoa city in 2002". Results of this study are as follows: The predominant serotype which circulated in Bien Hoa city in 2002 was Dengue-4. The number of children - 15 years old with clinical diagnoses of Viral syndrome and Fever of Unknown Origin (899 cases) is higher than that diagnosed as DF/DHF (603 cases). The number of dengue isolates recovered from Viral Syndromes, Fever of Unknown Origins and Suspect Dengue Patients (48 isolates) was higher than that isolated from DF/DHF cases (45 cases). This demonstrated that Viral Syndromes and Fever of Unknown Origins may be reservoir of important role in the distribution of dengue viruses in community