Goanna involved previously). This reinforces the wildlife authority's recommendation of not feeding animals while camping or adventuring, but most authorities doubt that a goanna will actually direct an intentional attack at a human unless the human attempts to attack it (or grasp at it) first. Aborigines who hunt goannas for food consider the perentie as a high-risk (but tasty) prey. The debate on whether goannas are venomous or not is growing. Previously, the incessant bleeding caused by goanna bites was thought to be the result of bacterial infection. A recent study suggests monitor lizards (including goannas) are venomous and have oral
Goanna koalas) as a tourist scarer, probably more convincing due to the reptiles' carnivorous nature and fearsome appearance. A common tale was that the bite of a goanna was infused with a powerful, incurable venom. Every year after the bite (or every seven years), the wound would flare up again. For many years, herpetologists generally believed goannas were nonvenomous, and lingering illness from their bites was due solely to infection and septicaemia as a result of their saliva being rife with bacteria from carrion and other food sources. However, in 2005, researchers at the University of Melbourne announced that oral venom