Incidence of fatal snake bite in Australia: A coronial based retrospective study (2000-2016)

- The rates of mortality from snakebite envenoming in Australia, while low, has remained similar for over 30 years in Australia.
- Collapse and cardiac arrest were commonly described in coronial reports where a diagnosis of snakebite was identified.
- Haemorrhagic, heavy lungs and petechial bleeding over heart and lungs is a common characteristic of snakebite envenoming found on autopsy.

IntroductionIt has been over 20 years since a national review of recorded deaths from snake envenoming. The present study aimed to provide an updated review of the epidemiology of deaths from snake bites in Australia.MethodsDeaths were identified from January 2000 to December 2016 from the National Coronial Information System. Cases identified due to snakes were extracted with data on coronial findings, autopsy and police records.ResultsThirty five deaths (2.2 per year) were ascribed or antecedent to a snake bite. Sixteen cases were attributed to snake bite/envenoming as leading directly to death, with other direct causes of death being multiple organ failure (n = 3), intracerebral haemorrhage (n = 2), cerebral hypoxia or anoxia (n = 3), cardiac arrest (n = 1), complications of snake bite (n = 3) or brain stem death (n = 1). Four cases did not have a snake bite indicated in the case history, with an initial diagnosis of either hyperthermia, stroke, gastroenteritis and a horse accident. The median age was 46.5 years (range 1.5-70 years), and 74% were males (n = 25). The time from bite to death varied from 1 h to 19 days. Fifty four percent of bites occurred at the person's residence (n = 1), with 17 being in an urban environment.ConclusionsDeath from snake bite remains rare in Australia, and has maintained a steady rate for over 20 years. Usually considered a 'rural issue', and with varying recorded causes of death, a nationally co-ordinated effort to further review the national picture of envenoming in Australia can inform education and resource needs within state and local contexts.