The spider can moderate the amount of venom it injects, and the severity of these symptoms often depend on how much venom is delivered. More than 250 redback bites are treated each year in Australia, many with antivenin. ... Nevertheless, the last human death attributed to redback envenomation occurred in 1956.

How long does it take for a redback to kill you?

Children, the elderly, or those with serious medical conditions are at much higher risk of severe effects resulting from a bite. Infants have died within hours of a bite, but adult fatalities have taken up to 30 days.

What happens if you get bitten by a redback spider?

The initial bite may only cause mild discomfort or irritation, and sometimes is not even noticed. Pain usually increases over an hour or two and may radiate up the limb. Abdominal or chest pain may develop, as may pain in other parts of the body.