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Research provides new clues to killer frog disease

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New research aimed at uncovering the secrets of frog population-destroying diseases has revealed some unexpected results that may change the way scientists fight outbreaks.


Dr. Donald McKnight, a biologist at James Cook University, said chytridiomycosis caused decline or extinction in more than 500 people. Race Of amphibians around the world.

“Not all Amphibian seeds Despite the susceptibility to chytridiomycosis and the ongoing presence of pathogens, some species and populations that initially declined have survived or increased, “says Dr. McKnight. ..

He said, as an example, the lid of an Australian race Frog population Waterfall frogs had the same experience, but began to re-colonize highland sites in the early 2000s. In contrast, the stone stream frogs did not noticeably decline at any height.

“The reason for these differences between species and populations is not entirely clear, but differences in microbial flora- BacteriaMold, and other microbes on frogs can play an important role, “says Dr. McKnight.

Scientists examined the bacterial and fungal flora of four Australian frog species in the same region that responded differently to chytridiomycosis.

They found that the microbial flora varies from species to species and may play a role in patterns of decline and recovery.

“Lace lid, the least resilient species, was also the least species of bacteria and fungi, consistent with those found in several other studies, where diverse microbial flora is important. It suggests that it may be.

“But what really surprised me was that the lace lid also had high levels of antifungal bacteria that are thought to play a role in preventing chytridiomycosis. In fact, the level of chytridiomycosis is The highest tended to be individuals. They have the highest levels of antifungal bacteria. “

He said the relative abundance of what was thought to be a protective and antifungal bacterium was highest in Australian racerid frogs and lowest in waterfalls. Frog The race lid population has not recovered, but the waterfall frogs have mainly recovered.

Dr. McKnight said the findings would provide scientists with a variety of possible answers that could be more questions.

“For example, the presence of a fungus that causes chytridiomycosis can actually propagate antifungal bacteria, or there may be other factors in the frog’s environment that favor both bacteria and pathogens. Or perhaps just frogs. High levels of antifungal bacteria can withstand high infectious loads, “says Dr. McKnight.

He said research has important conservation implications.

“In laboratory tests, seeding amphibians with antifungal bacteria (probiotics) often reduces mortality and often causes frogs to clear the infection or reduce the intensity of the infection.

“Therefore, probiotics are widely considered as a promising strategy for alleviating disease. Wild population And support population recovery.Unfortunately, our results show that this strategy may not work unless probiotics use a diverse range of bacteria and may need to be specially tailored to each. Suggests Frog seed“Dr. McKnight said.


Bacteria on frog skin can help fight fungal infections in humans


For more information:
Donald T. McKnight et al, Fungal and Bacterial Microbial Interactions in Rainforest Frogs After Disease Outbreak, Ecosphere (2022). DOI: 10.1002 / ecs2.4037

Quote: Research from https: //phys.org/news/2022-07-clues-killer-frog-disease.html to Killer Frog Disease (July 16, 2022) obtained on July 16, 2022. Provides new clues for

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Research provides new clues to killer frog disease

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