Pandemic Scares Leading to New Fields
“Conservation Medicine” is a new field emerging in response to the disciplinary gaps that have been put in the spotlight by avian flu et al. Fusing health and ecological sciences, as a new virology report in Science points out, will make it possible to better address questions calling on expertise in both disciplines.
For example, in regards to bats (recently found to be hosts for SARS):
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We do not know whether [the physiological traits associated with flying] allow these ancient mammals to differ from other mammals in the way they combat potential viral infections. Are there differences in the functionality or type of receptors required for infection? Are there bat antiviral proteins (interferons) that can stop viral replication as in other mammals, or do bats possess a mechanism to prevent their inactivation? Alternatively, we could ask if bats possess a novel innate immunity that allows them to cope with certain classes of viruses in ways that other mammals cannot. If the latter is the case, then what would studies of bat immunity tell us about new ways to attack and treat viral diseases? The literature is silent on this. Very few medical schools have experimental bat colonies, and work in this area may be a little “outside the box” for conservative funding agencies.
Knowing more about bats, and particularly more about bat ecology and immunology, is crucial if we are to develop new treatments and ways to control the viral diseases that are an increasing threat to humans. Assuming we can control these diseases by simply controlling bats is both naïve and short-sighted. Instead, we must recognize that increased rates of spillover-mediated pathogen transmission from bats to humans may simply reflect an increase in their contact through anthropogenic modification of the bat’s natural environment. The emergence of Nipah virus and SARS-CoV epitomizes this situation. In regions where large areas of bat habitat have been converted to agricultural land or oil palm plantations, the surviving bat populations will be concentrated in the remaining patches of forest that provide the resources they need. When these patches of fruit trees are used as shade for intensive animal husbandry, then it is highly likely that the fruits and insects chewed by bats will find their way into the human food chain.
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On a personal note, I will say for the record that it saddened me to learn that bats were discovered to be SARS vectors. I’ve always had a soft spot for bats, seeing as I was a member of Bat Conservation International every year between the ages of 10 and… 23? 24? And built several bat-houses in my day… I’ve always felt sympathetic to to those misunderstood and often unjustly demonized creatures… and well, it’s sad to think how some places will no doubt rush into mass bat destruction even though it is unlikely to make a significant dent in the problem…

