| serological and virological studies on patients with dengue hemorrhagic fever (dhf) in chanthaburi province, thailand. ii. serological characteristics of viruses isolated from dhf patients using a clone of singh's aedes albopictus cells. | four strains of dengue (den) virus were isolated using c6/36 cells, a clone of singh's aedes albopictus cells, from acute phase sera of dhf patients in thailand in 1978. the isolates grown and passaged in c6/36 cells were not neutralized appreciably by standard rabbit antisera against each of the 4 types of den virus, but their serotypes could be identified by complement fixation (cf) tests. after the 4th or 10th passage in suckling mouse brain (smb), however, three of the four strains showed ty ... | 1980 | 7458895 |