(Image: Taryn Crispin, 2013) |
The target class of vertebrates, amphibians, are typically bound to moist habitats in order to survive and successfully breed, and their skin is permeable to water, air and electrolytes. The physiological importance of the skin in amphibians makes them particularly vulnerable to skin infections, and their tight association with moist habitats makes them susceptible to Bd skin infection, as this fungi is believed to transfer and duplicate in water.
The specific mechanism by which Bd causes fatality in amphibians is unclear, but it is generally agreed upon in the scientific community that it impairs the regulatory functioning of frog skin.
Bd infection is spreading world-wide at an alarming rate, and it is believed that the global trading of frogs (as food for human consumption, and previously for pregnancy testing in humans) is responsible for this spread.
Countries where amphibian skin samples have tested positive for Bd, number of incidences of Bd per country shown as colour shematic. (Image: Global Bd-Mapping Project) |
Where is Bd originally come from?
ReplyDeleteIt still is not clear where Bd initially reared its ugly head. Originally, Africa was the proposed site of origin for Bd, as the earliest evidence of Bd (1938) was in African clawed frogs, which had been traded globally for human pregnancy assays (till the 1960s). However, there has been recent genetic work that suggests that there is higher diversity in Bd in North American bullfrogs (Rana catesbeiana, traded primarily for human consumption) than in African clawed frogs, suggesting that Bd may not have originated from Africa (http://bit.ly/YRXFn8).
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ReplyDeleteDOCTOR AJAKAJA CAN AS WELL CURE THE FOLLOWING DISEASE:-
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Dr OBUDU have been a great doctor even know in the world, am here today to tell the world my testimony about how i was cured from herpes.i was having this deadly disease called herpes in my body for the past 6 years but now i know longer have it again. i never know that this disease have cure not until i meet someone know to the world called Dr OBUDU he cured me from herpes he have been great to me and will also be great to you too. i have work with other doctor but nothing come out. one day i did a research and came across the testimony of a lady that also have same disease and got cured by Dr OBUDU. then i contacted his email and told him my problem.he told me not to worry that he have the cure i didn't believe him when he said so because my doctor told me there is no cure.he told me i need to get a herbal medicine for the cure which i did and now am totally cured you can also be cured of any other diseases too if only you believe in him. contact him via email OBUDU.MIRACLEHERBALHOME@GMAIL.COM you can also call or whatsapp him true his mobile number +2347035974895
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ReplyDeleteI was diagnose with human papilloma virus (HPV) 4 years ago and i met a doctor he told me there is no cure and i have be taking some medication the warts multiplied when trying to removed them and it got me embarrass and pains, luckily few weeks ago i was recommend to Dr Onokun for natural treatment after one week i got 100% cure and all the wart and pains got disappeared, i sheared this post because its part of my life experience, encase anyone need speedy help about this cure email Dr Onokun via, dronokunherbalcure@gmail.com
ReplyDeleteI was diagnose with human papilloma virus (HPV) 4 years ago and i met a doctor he told me there is no cure and i have be taking some medication the warts multiplied when trying to removed them and it got me embarrass and pains, luckily few weeks ago i was recommend to Dr Onokun for natural treatment after one week i got 100% cure and all the wart and pains got disappeared, i sheared this post because its part of my life experience, encase anyone need speedy help about this cure email Dr Onokun via, dronokunherbalcure@gmail.com
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ReplyDelete