The two most common frog diseases, chytridiomycosis and ranavirus
infection, are linked to frog population declines worldwide.
Atrazine increases Ranavirus
susceptibility in the tiger salamander, Ambystoma tigrinum.
EXPLORING ALTERNATE GENES FOR RANAVIRUS
A study into the rapid spread of the infectious disease ranavirus
- characterised by ulcers, red spots, breakdown of limbs and death - found genetic analysis suggested at least two separate introductions of the disease into the UK.
In this study, 10 ranavirus
strains isolated from Rana dybowskii and Rana amurensis Boulenger across three geographic locations in Northeastern China were studied through PCR, cloning, sequencing, restriction endonuclease analysis (REA), and phylogenetic analysis.
The viruses are part of the Ranavirus
group referred to as common midwife toad virus (CMTV) which previously was known only to cause declines in Britain's common frog.
Although in one case researchers were able to determine that a disease called ranavirus
was responsible for the demise of an unprecedented number of turtles, frogs and salamanders in Maryland over the past few years, many other amphibian deaths still defy a clear explanation.
The common frog has been virtually wiped out, with around 80% of some populations dying after contracting the disease known as ranavirus
The virus, called Ranavirus
, has invaded the home counties around London, and is now spreading north and west.
ELUCIDATION OF RANAVIRUS
GENE EXPRESSION USING ANTISENSE MORPHOLINO OLIGONUCLEOTIDES
Legislation is also needed to try and stop the spread of disease, to combat two infectious diseases - a fungus and ranavirus
- which are pushing species to extinction across the world.
The two diseases, ranavirus
and chytrid fungus, have already been found in West and South Cumbria and Kent.