How are black widow spiders harmful to humans?

Answer 1

The bite of the Black Widow Spider is harmful, although it is not usually fatal to a healthy adult human. During the first 24-hours, a bite can cause severe muscle pain and cramping, headache dizziness, tremors excessive sweating, nausea, vomiting, anxiety, fatigue, insomnia, tearing of the eyes, joint pain, too rapid or too slow heart beat, restlessness and elevated blood pressure, among other problems. The muscle spasms, tingling, nervousness and weakness can last for months. Anyone who thinks he or she may have been bitten by a Black Widow should seek medical attention immediately.

Answer 2

Some are. Almost all Spiders are venomous, but that is like saying that almost all rocks can hurt you if they fall on you. There are a few spider species that have no venom. The rest of the spiders have venom of various degrees of toxicity, and they carry various amounts of venom ready for use. So a small spider with very toxic venom might make you feel as sick as a large spider with lots of not very toxic venom.

There are all kinds of black spiders. Unless they are black widow spiders, or Australian Funnel Web Spiders, however, they are not going to kill you. There are relatives of the widow spiders that have a small volume of the same general kind of venom, but they don't have enough to cause a medical problem. There are lots of other black spiders that don't have very toxic venom and don't have very much of it.

If you start worrying about spiders that are mostly black or dark gray, then you can get into more confusion.

An easier way to think of things is just to find out what spiders in your area can produce medically significant bites. If you are in the U.S., you really only need to worry about the various widow spiders (the black widow being the main one) and the various recluse spiders (the brown recluse being the main one).

Answer 3

Well,Although all spiders have venom, few of them have venom potent enough to seriously hurt a human. It's also uncommon for a spider to bite a human. They need to be provoked which is usually caused by accidentally pressing against them, sitting on them, or rolling over on to them in bed. I have handled hundreds of jumping spiders and I have never been bitten. Most are small and can not open their fangs wide enough to bite into skin.

Answer 4

The bites from these spiders are rarely fatal ,but you should seek medical assistance if bitten

Answer 5

A Black Widow's venom is a very potent neurotoxin.