Featured Research

from universities, journals, and other organizations

Research Links Water Mold To Lesions, Ulcers In East Coast Estuarine Fish

Date:
April 28, 2006
Source:
National Oceanic & Atmospheric Administration
Summary:
A new study, led by NOAA scientists and reported in the peer-reviewed journal Applied and Environmental Microbiology, provides strong evidence that the water mold known as Aphanomyces invadans is the pathogen responsible for seasonal outbreaks of skin ulcers and lesions observed in menhaden and other estuarine fish along the U.S. East Coast.

A new study, led by NOAA scientists and reported in the peer-reviewed journal Applied and Environmental Microbiology, provides strong evidence that the water mold known as Aphanomyces invadans is the pathogen responsible for seasonal outbreaks of skin ulcers and lesions observed in menhaden and other estuarine fish along the U.S. East Coast.

Related Articles


Large fish lesion events in the 1990s, initially linked to the dinoflagellate Pfiesteria piscicida, caused widespread concern over the safety of seafood and recreational waters. These concerns caused many people to avoid the coast and to avoid eating seafood. An independent study published in 2003 in the journal Ocean and Coastal Management estimated that lost revenues for the tourism, restaurant and seafood industries exceeded $100 million.

Scientists from NOAA's Center for Coastal Fisheries and Habitat Research in Beaufort, N.C., led the research along with experts from the Florida Fish and Wildlife Conservation Commission, the North Carolina Division of Water Quality, the Virginia Institute of Marine Science at The College of William and Mary, and North Carolina State University's College of Veterinary Medicine.

The scientists developed two very specific tests or assays to detect the A. invadans water mold -- one using sensitive polymerase chain reaction (PCR) procedures and the other using fluorescent in situ hybridization (FISH). They first validated these assays in the laboratory before applying them to Atlantic menhaden taken from the Pamlico and Neuse River estuaries in North Carolina.

The results of both assays were the same -- all lesioned menhaden tested positive for A.invidans.

"The FISH assay is the first molecular assay to provide unambiguous visual confirmation that water mold from the ulcerated lesions were exclusively A. invidans," said Mark W. Vandersea of NOAA, corresponding author of the study. Until this study, scientists had been unable to positively identify A.invadans as the only species of water mold responsible for causing the lesions in wild caught fish.

The new study supports a growing body of research evidence, including recently collected data by researchers in southern Asia and Australia, indicating that A.invidans, rather than Pfiesteria, is the major cause of ulcers and lesions in fish.

A. invidans, however, should not be considered the sole cause for ulcerative lesions. Stress, poor nutrition, and certain parasite, bacterial, and viral infections are all capable of producing similar lesions. Further studies will be needed to determine how natural A.invidans infections are caused.

"The PCR and FISH assays developed in this study now make it possible to screen the large numbers of environmental samples needed to identify alternative hosts and sources of A. invidans infections," said NOAA scientist Wayne Litaker. "Identifying the sources and the conditions promoting the growth and transmission of the pathogen will help resource managers better predict when lesion events are likely to occur and perhaps develop effective mitigation strategies."


Story Source:

The above story is based on materials provided by National Oceanic & Atmospheric Administration. Note: Materials may be edited for content and length.


Cite This Page:

National Oceanic & Atmospheric Administration. "Research Links Water Mold To Lesions, Ulcers In East Coast Estuarine Fish." ScienceDaily. ScienceDaily, 28 April 2006. <www.sciencedaily.com/releases/2006/04/060428093852.htm>.
National Oceanic & Atmospheric Administration. (2006, April 28). Research Links Water Mold To Lesions, Ulcers In East Coast Estuarine Fish. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2006/04/060428093852.htm
National Oceanic & Atmospheric Administration. "Research Links Water Mold To Lesions, Ulcers In East Coast Estuarine Fish." ScienceDaily. www.sciencedaily.com/releases/2006/04/060428093852.htm (accessed October 25, 2014).

Share This



More Plants & Animals News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins