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I was wondering if every venomous snake bite was fatal?
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No, not every venomous snakebite not fatal. As a matter of fact, the vast majority of snakebites are not fatal or even acutely life-threatening, even without proper antivenin treatment. Only a small percentage of all snakebites prove fatal.
Consider this: Out of approximately 12,000 snakebites that occur in the U.S. per year, only 8-12 are fatal.
I like comparing a snakebite to a gunshot wound. There are a lot of different variables that come into play, the combination of which determine the severity and outcome of the situation. These variables include the species of snake, the delivered amount of venom, the location of the bite site, the age and health status of the bite victim, etc. All of these variables have a direct effect on the symptomatic and course of treatment.
In some of the less developed countries - specifically Sri Lanka, India, etc. - modern medical facilities are not readily available to the common people, especially in rural areas. This, combined with the fact that many people in such areas lack firm footwear and secure housing, is the primary reason why snakebites cause many deaths in some parts of the world. Statistically, a common non-snake-keeping-person in the U.S. should be more concerned about electric appliances than about the danger posed by venomous snakes.
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Does the potency of the venom increase and decrease between families or between each snake?
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Venom composition and potency varies most significantly between families of snakes, but also between species, and to some degree even among individual populations of a given species. Species like Russell's vipers (
Daboia russelli), for example, are known to show great variations in the venom of various localities.
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What do some of the not as potent bites bring, and of course potent bites kill quickly right?
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Venom potency is only one of two important factors when assessing the potential danger of a given species of venomous snake, the other factor being yield. Without a significant yield, even the most potent venom becomes
relatively harmless. On the other hand, a relatively mild venom can put you into serious trouble, if enough of it is injected. It is therefore important that one knows about the potency and the yield of a given species, and understands the relationship between these two.
Snakes that are currently considered to be relatively mild include many of the rear-fanged colubrids, such as mangrove snakes (
Boiga dendrophila), false water cobras (
Hydrodynastes gigas), etc. Bites from these species tend to produce little or no symptomatic, though exceptions do occur. Typical symptomatic of a mangrove snake envenomation would include minor swelling, redness, and a ripper of a headache. Among the front-fanged venomous snakes, species such as the Northamerican copperhead (
Agkistrodon contortrix) and the eyelash viper (
Bothriechis schlegelii) are considered to be
relatively mild, with typical symptoms including severe pain, swelling, and necrosis, which may lead to the loss of a digit or two.
Hope this helps. If you have any further questions, feel free to ask.
Regards,
---Nightflight99