The species of green pit viper in Bangkok.

The aims of this study were to delineate the species of Green pit viper and clinical patterns in Bangkok areas. This study was a blind independent comparison. Among 188 Green pit vipers collected only two species, i.e. Trimeresurus alborabris and T. macrops were found. There were no differences in snake sizes and in clinical patterns of snake bite. The majority of the clinical cases (90.1%) was classified as of mild degree of severity and severe envenomation was observed only in T. alborabris victims. The ratio between T. alborabris and T. macrops victims in Bangkok residents was 1.7:1 but the ratio was reversed in Thonburi residents.