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Scientific sleuths pinpoint the guilty coral killers
Date:11/23/2011

The elusive culprits that are killing countless coral reefs around the world can now be nabbed with technology normally used to diagnose human diseases, marine researchers say.

Coral researchers and reef managers will be able to identify coral infections using a new method that allows them to classify specific diseases based on the presence of microbes.

This could lead to more effective action to reduce the impact of disease on the world's imperilled coral reefs.

"Current classification of coral diseases is mostly based on a description of how the coral has deteriorated, such as the pattern of tissue loss and abnormal colours," says Joseph Pollock, a PhD student at the ARC Centre of Excellence for Coral Reef Studies. "This is an ineffective way to identify coral diseases because different diseases can often look very similar. For instance, in the Caribbean alone, more than six "white" diseases show the same characteristics of tissue loss exposing white coral skeletons.

Coral diseases can be caused by a number of different microbes, including viruses, bacteria and fungi. Knowing exactly which toxic organism leads to a particular disease is therefore important for accurate diagnosis and for planning how to manage or control its impact.

One of Pollock's supervisors, David Bourne from the Australian Institute of Marine Science, says that the recent worldwide decline of coral reefs has been accompanied by increased disease, creating an urgent need for a deeper understanding of the various diseases, including what harmful bacteria and viruses contribute to different coral diseases, what triggers them and how they spread.

"Instead of relying on appearances to tell us what disease the corals have, we need to determine what's happening to them before the symptoms show. This will help us to control, or reduce the impacts."

By applying a diagnostic technology commonly used in human disease identification or in
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Contact: Joe Pollock
fjpollock@gmail.com
61-004-664-07141
ARC Centre of Excellence in Coral Reef Studies
Source:Eurekalert

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