Causes: Carbon monoxide poisoning:
CO can occur from car exhausts, boats, or gas heaters in poorly ventilated areas.
The following medical news items are relevant to causes of Carbon monoxide poisoning:
As with all medical conditions, there may be many causal factors. Further relevant information on causes of Carbon monoxide poisoning may be found in:
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Of the approximately 45,000 snakebites that occur in the United States each year, 7,000 to 8,000 are from poisonous snakes, resulting in 5 to 6 deaths. Such bites are most common during summer afternoons in grassy or rocky habitats.
Pit vipers are nocturnal but active snakes that are responsible for 99% of venomous snake bites in the United States. Coral snakes are also nocturnal, but their placidity makes coral snake bites less common than pit viper bites. Coral snakes tend to bite with a chewing motion, and may leave multiple fang marks, small lacerations, and extensive tissue destruction.
Source: Professional Guide to Diseases (Eighth Edition), 2005
The only poisonous snakes in the United States are pit vipers (Crotalidae) and coral snakes (Elapidae). Pit vipers include rattlesnakes, water moccasins (cottonmouths), and copperheads. They have a pitted depression between their eyes and nostrils and two fangs, ¾" to 1¼"nbsp;(2 to 3 cm) long. Because fangs may break off or grow behind old ones, some snakes may have one, three, or four fangs.
Because coral snakes are nocturnal and placid, their bites are less common than pit viper bites; pit vipers are also nocturnal but are more active. The fangs of coral snakes are short but have teeth behind them. Coral snakes have distinctive red, black, and yellow bands (yellow bands always border red ones), tend to bite with a chewing motion, and may leave multiple fang marks, small lacerations, and much tissue destruction.
Source: Handbook of Diseases, 2003
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