Which Spiders Have Venom?
WouterSome of the most dangerous spiders include the Brazilian Wandering Spider and the Black Widow. These two species are so toxic that they can cause serious health problems, especially in children. They can also kill.
Spider venom contains a number of compounds, which are classified based on their molecular weight and their specific toxicity to humans. Some of these toxins include neurotoxins, necrotic venoms, and cytotoxins.
The neurotoxic venoms work directly on the nervous system. They can result in respiratory and cardiac arrest. They are particularly dangerous for young children and the elderly.
The necrotic venoms cause tissue damage. This can cause blisters, lesions, and inflammation. The effects of this venom are not common in human bite victims.
The cytotoxic venoms, on the other hand, work indirectly on the cells. They are mainly composed of peptides that are more potent than the neurotoxic peptides. They tend to target ion channels on neurons. They are effective in killing quickly.
Although almost all spiders have venom glands, only a few species have venom that can be dangerous. Some of the most dangerous spiders include the Black Widow, the Brazilian Wandering Spider, and the yellow sac spider. The latter is considered to be the world’s most dangerous spider.
Although it is not fatal, the venom from the Brazilian Wandering Spider can cause nausea, vomiting, diarrhea, high blood pressure, and convulsions. It also causes sweating, dilated pupils, and blurred vision.
The venom of the Black Widow and the Brown Recluse spiders contain cytotoxins. These toxins can overload the nervous system, resulting in paralysis.
