Chytridiomycosis Fungi

Scientists have traced a Fungus that killed frogs

Scientists have traced a deadly Fungus that kills frogs on a global scale, licking and licking on the Korean peninsula, triggering a new call to stop the trade in amphibians.

A dangerous infectious disease that may lead to extinction of species, Batrachochytrium dendrobatidis (Bd) is also known as the Chytrid fungus.

Skin infections transmitted from wild animals to pets can cause varicella, which can affect the ability of amphibians to regulate water and electrolytes and may lead to heart failure.

“Since the 1990s, biologists have known that Bd is the cause of the decline of many amphibians, but until now we have not been able to determine exactly where it came from,” said Simon O’Hanlon, epidemiology department of infectious diseases. . Imperial College London is the co-author of the “Science” magazine report.

“In our paper, we solved this problem and showed that the bloodline that caused this destruction can be traced back to East Asia.”

A team of international scientists collected samples of pathogens from around the world and sequenced the genome.

They discovered the four major genetic lines of the fungus – three of them were found all over the world, and the other four were found only in native frogs in South Korea.

According to the report, genetic analysis shows that “between 50 and 120 years ago, the scope of the disease has greatly expanded, and it coincides with the rapid expansion of intercontinental trade in the world.”

The findings provide “strong evidence that the trade in amphibians imported from Asia is banned because the risk of exporting previously unknown strains in this area is high,” he added.

Another pathogen that affects European ticks (B. salamandrivorans or BSal) is also from Asia and spread through the trade of pet amphibians worldwide.

“Our study not only treats East Asia as a zero point for this deadly fungal pathogen, but also shows that we can only reveal the tip of the iceberg of polymorphism in Asian soils,” said Matthew Fisher, a professor at Imperial College London.

“Therefore, we will continue to take risks on the irreplaceable biodiversity of the global amphibians before the ongoing trading of infected amphibians.”

In an accompanying scientific perspective, Karen Lips of the Department of Biology at the University of Maryland agrees that the results of the survey show that the current efforts to control deadly fungi have not been successful.

“The authors stated that all Bd variants exist in the commercial trade of amphibians (including food, pets and scientific specimens),” she wrote.

This shows that “intercontinental intercontinental dissemination and international biosafety measures have failed to control the spread of this pathogen.”

A study in the Science Journal supports the pet trade to help spread killer strains of chytrid fungus all over the world.

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