Loxosceles Spider venoms

B. Loxosceles (brown spiders) venom contains a variety of digestive enzymes and sphingomyelinase D, which is cytotoxic, chemotactically attracts white blood cells to the bite site, and also has a role in producing systemic symptoms such as hemolysis. 

The widow spiders are Latrodectus species. Unlike the Loxosceles species described above, the bite sites from widow spiders show virtually no damage. The symptoms of widow spider poisoning are many and varied. They include pain, cramps, sweating, headache, dizziness, tremor, nausea, vomiting, and elevated blood pressure. The venom contains several proteins, including a proteinaceous neurotoxin with a molecular mass of about 130,000. 

High amounts of hyaluronidase are present in scorpion venom [17]. The enzyme is also present in the venom of tarantula (Eurypelma califomicum) [24] and in the venom of the poisonous brown recluse spider (Loxosceles reclusa) [25],... 

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