Rigidity and spasms of most large muscle groups, particularly those of the abdomen, are common symptoms. There is usually a slight rise in body temperature, increased blood pressure, a leucocytosis, and an increase in spinal fluid pressure. The patient often becomes dizzy, weak, thirsty, nauseated and shows symptoms of shock. Local treatment is generally ineffective and incision and suction are of little value. Cortisone has also been reported to provide some relief.
Mortalities are generally low.
It can be recognized by the dark brown fiddle-shaped marking on the dorsal cephalothorax. The bite of this spider is localized and produces considerable necrosis which may lead to an unsightly scar. The necrotic area turns black and dry and may slough in a few days, leaving a granular area. Healing usually take place slowly and secondary infection is common. Painful edema and erythema may develop within an hour of the initial bite.