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A study of Thai cobra (Naja kaouthia) bites in Thailand.

This study evaluated factors affecting the severity of bite site necrosis and systemic symptoms resulting from envenomation among patients bitten by Thai cobras (Naja kaouthia) in Thailand. We studied 45 victims prospectively. An additional 40 medical records were obtained for a retrospective study. Collected data included gender of the victims, anatomic locations of bites, where attacks took place, and predisposing factors and how they might have affected the clinical course. Most patients were asymptomatic or mildly symptomatic. Neurotoxic symptoms and respiratory failure developed in 31.11% and 12.50% in the prospective and retrospective groups, respectively. Only one patient died, from the effects of prolonged respiratory failure. There was some degree of tissue necrosis at the bite site for almost all victims. One victim required amputation of a digit in the retrospective study, and 33.60% of the prospective group and 20% of the retrospective group required minor surgical debridement. Snakebites in Thailand are still a public health problem, although rapid urbanization has decreased the number of victims because of degradation of the snake's habitat.