"Loxosceles reclusa" (as with all of the "Loxosceles" genus) can deliver, through envenomation via uncate chelicerae-type fangs, a potentially dermonecrotic loxoscelism due to the presence of sphingomyelinase D toxin in its venom. Most bites are minor with no dermonecrosis. However, a small number of brown recluse bites do produce dermonecrotic loxoscelism; an even smaller number produce severe cutaneous (skin) or viscerocutaneous (systemic) symptoms. In one study of clinically diagnosed brown recluse bites, skin necrosis occurred 37% of the time, while systemic illness occurred 14% of the time. In these cases, the bites produced a range of symptoms common to many members of the genus "Loxosceles" known as loxoscelism, which may be cutaneous and viscerocutaneous. In very rare cases, bites can even cause hemolysis—the bursting of red blood cells.