A Big Step for Bats

Merlin Tuttle
1/22/19

Today’s issue of TheScientist contains another outstanding example of how MTBC is making a unique, but critical difference for bats. This article [by Merlin Tuttle] was originally submitted as an email to the editor. On January 13, I explained the harm done by biased portrayal of bats. The editor promptly requested permission to publish my communication as an op-ed. We encourage our members to share it broadly. Nothing can threaten bats more than the fear and intolerance created by misleading disease stories.

Rousette fruit bats are essential pollinators and seed dispersers. They form colonies of many thousands in caves and abandoned mines where they are extremely vulnerable to extermination. Tens of thousands were killed at a single site in Uganda by humans overreacting to fear of Marburg virus.

Speculation linking bats to scary diseases has become lucrative, both in generating research grants and media readership. As historically documented, it can have devastating impact in fostering intolerance and even massive bat eradication. It also threatens the credibility of scientists and publishers and diverts critical public health funding from far higher priorities.

Many authors and publishers of such counterproductive speculation are well intended, just misinformed. If kindly approached with sound documentation of the harm being done, they are appreciative and can be extremely helpful as we have repeatedly demonstrated.

 

 

 

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UPDATE!  Ebola virus researchers considering alternative reservoir hypotheses, bats unlikely

Hundeds of thousands of Straw-colored fruit bats (Eidolon helvum) emerging from their roost in a city park in Abidjan, Ivory Coast. Such huge colonies have occupied African cities throughout recorded history without causing disease outbreaks.
Hundreds of thousands of Straw-colored fruit bats (Eidolon helvum) emerging from their roost in a city park in Abidjan, Ivory Coast. Such huge colonies have occupied African cities throughout recorded history without causing disease outbreaks.

Following years of headline speculation reporting bats to be the reservoir for Ebola, a review of current knowledge points elsewhere. This often fatal disease is caused by the Ebolavirus genus, which includes five species (Sudan, Zaire, Bundibugyo, Tai Forest and Reston virus). The geographical distribution of these species along separate river basins is inconsistent with a highly mobile source, such as bats, that easily cross basin borders. (more…)

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“Bats and Viruses” Book Review by Merlin Tuttle

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Bats and Viruses, edited by Lin-Fa Wang and Christopher Cowled, provides the first summary of current knowledge on how bats and viruses interact. It is an invaluable resource for all who are concerned about bats, whether from a public health or a conservation perspective. Given the rate of viral discovery it is commendably up-to-date.

 

Viral discoveries, distribution, potential for zoonoses, best practices, research biases and areas in need of further investigation are thoroughly covered.

Bats appear to serve as reservoir hosts for several of the world’s deadliest diseases. However, as noted, transmission to humans or their livestock is rare, and in most cases can be easily avoided. Advice not to eat bushmeat, handle unfamiliar animals, mix unquarantined wildlife in markets or plant fruit trees where flying foxes can be lured into close proximity to livestock is appreciated.

Numerous biases and possible misinterpretations are explained. Viral reservoirs cannot be confirmed based on mere presence of viruses or antibodies, and those found in bat guts or feces may come from insects or other foods. Also arthropods such as mosquitoes can simultaneously infect more than one species with identical zoonotic viruses, giving a false impression of transmission between incidental hosts.

(more…)

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