New tadpole disease affecting frogs across globe, scientists find

[IceWizard]

Mon Aug 10, 2015 3:25pm EDT

LONDON (Reuters) -
Tadpoles are contracting a new, highly infectious disease that may be threatening frog populations worldwide, British scientists have found.

A parasitic disease caused by single-celled
microbes known as "protists" was found in the
livers of tadpole samples taken from six
countries across three continents, the scientists said in a study published in the Proceedings of the National Academy of Sciences Journal on Monday.

The disease, which was found in both tropical
and temperate sites, is a distant relative of
oyster parasites, they said. "Global frog populations are suffering serious declines and infectious disease has been shown to be a significant factor," said Thomas Richards
of Exeter University, who co-led the study.

"We now need to figure out if this novel microbe causes significant disease and could be contributing to the frog population declines."
Amphibians are among the most threatened of
all animal groups. In 2008, 32 percent of frog
species were categorized as threatened or
extinct and 42 percent were listed as in decline.

Some scientists say falling populations of
amphibians and other animals suggest the Earth is undergoing a sixth so-called "mass extinction event", with extinctions happening so fast they rival the decline and death of the dinosaurs in just 250 years.


(Reporting by Kate Kelland, editing by Larry
King)