Science: Corpses are no health hazard
Science: Corpses are no health hazard
David Adam, Guardian News Services/London
Contrary to common belief, there is no evidence that corpses pose
a risk of disease epidemics after natural disasters." Most
infectious bacteria and viruses die within about 24 hours after
death
In a disaster of biblical proportions, one gruesome image
among too many was the bulldozing of hundreds of unidentified
bodies into mass graves in the Indonesian province of Banda Aceh.
Officials there said the move was necessary "because of the smell
and the health concern".
Not so, say public health experts. In fact the move directly
contradicts advice from the World Health Organization (WHO),
which stated in a communique following the disaster: "Bodies
should not be disposed of unceremoniously in mass graves. This
does not constitute a public health measure, violates important
social norms and can waste scarce resources."
It adds: "Contrary to common belief, there is no evidence that
corpses pose a risk of disease epidemics after natural
disasters."
Most infectious bacteria and viruses die within about 24 hours
after death, though the WHO says people handling bodies should
protect themselves from gastrointestinal infections and
bloodborne viruses such as Hepatitis B.
They could also catch tuberculosis if the bacteria are present
in air from the lungs or fluid from the mouth and nose as the
corpse is moved.
Oliver Morgan, an environmental engineer and public health
expert at the London School of Hygiene and Tropical Medicine, has
studied the risks after natural disasters.
He says the only serious threat to the wider population from
corpses comes from cholera, because dead bodies release the
contents of their bowels.
"That's only a concern for the first day or so. Now we're a
week into it that problem is no longer around. It's basically
like someone having diarrhea. If you come back a week later it's
not going to be infectious."
Even shortly afterwards the risk is low - disaster victims are
no more likely to be carriers than the overall population.
"The risks are all due to the survivors," Morgan says.
"Survivors are going to be ill and potentially transmit diseases
between each other."
Most of the problems are caused by a lack of clean drinking
water. Supplies are contaminated with sea water and
infrastructure is smashed.
Stomach bugs like salmonella and E.Coli will flourish and kill
through diarrhea and dehydration.
The scale of this disaster is unprecedented in modern times,
but Morgan says some estimates of death from disease sweeping
through survivors are exaggerated. Some agencies have warned that
as many people again could perish as died in the initial flood.
"Following almost all natural disasters there's a considerable
increase in diarrheal diseases but what we don't normally see are
huge fatality outbreaks. Experience hasn't shown it to be that
size."