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Both the widow and the recluse are quite timid. Widow bites are generally not dangerous unless you're elderly, very young, or immunocompromised. They'll swell and be red for a while, but it's not life-threatening. Get near a widow, poke it, and it cowers in fear.

The recluse's bite isn't itself dangerous - it's the necrotic bacteria that they carry that can get into your bite, which IIRC happens in about 20-25% of bites. If they bite at all - they're more likely to run away terrified than bite, but it's definitely something to be worried about.

However, if you find them, do not kill them because they are cannibals. If other recluses smell a dead one, they'll come to eat it. A recluse infestation is a very difficult job for exterminators for this reason.

I was more worried about the (biting!) gnats in GA. And the snakes. And the mosquitoes.




How interesting! Ive known several people with brown recluse bites and I always assumed the (rather unpalatable) necrosis was from the venom, not some cofactor like bacteria.

Upon reflection, it makes total sense. The presentations they had would be identical to serious infection, ie visible red marks on the skin tracing blood vessels and following the blood flow.


Yeah it does... https://en.m.wikipedia.org/wiki/Loxoscelism

Sphingomyelinase D


I thought they had a hemotoxin in their venom like a viper that contains enzymes that break down red blood cells.


There may be bacteria, but the venom is known to contain sphingomyelinase D which is an enzyme that causes cell death. That is what causes necrosis.

https://en.m.wikipedia.org/wiki/Loxoscelism


A solitary male spider will run and take cover, but a mother will stand their position and will not hesitate to bite to defend its eggsac or spiderlings.




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