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Some bacteria in the Gulf of Mexico love eating oil as much as they like infecting humans. … One of the more pressing questions involves Vibrio… vulnificus… this year there is a likely possibility, scientists say, that Vibrio growth could be further spurred, directly or indirectly, in response to the oil and the organic flotsam it has left behind.
In fact, the National Science Foundation awarded a rapid response grant to research this very topic, From the NSF website on June 21, 2010:
How are the oysters faring with the oil spill? The National Science Foundation (NSF) has awarded a rapid response grant to scientists Crystal Johnson, Gary King and Ed Laws of Louisiana State University (LSU) to find out.
The researchers will look at how the abundance and virulence of naturally-occurring bacteria called Vibrio parahaemolyticus and Vibrio vulnificus, often found in oyster beds, may change in response to the spill.
The findings will provide insights into vibrios’ ability to “consume” oil, and will allow the biologists to uncover antibiotic compounds in certain species of phytoplankton that live in association with vibrios.
“Adaptation to the spilled oil may result in an increase in some types of vibrios,” says Johnson. “We believe that vibrios will change in response to the stress of direct exposure to oil and/or to indirect effects of interactions with other species affected by oil.”
Vibrios… may even help break down the components of the oil.
“Little is known about how microbes–in the water, along coasts, and associated with other species–are affected by the spill,” says Phillip Taylor, acting director of NSF’s Ocean Sciences Division.
“Through this NSF rapid response grant, these scientists will be able to track the oil’s effects on marine species living in the Gulf, and by extension, the possible threat to human health.” …
“Oil-induced changes in phytoplankton community composition and their associated bacterial communities are related to changes in vibrio abundance,” he says. Some species of phytoplankton in Louisiana and Mississippi coastal waters may excrete antibiotics that inhibit the growth of vibrios, according to Laws.
Jim Oliver, a Vibrio specialist at the University of North Carolina, Charlotte:
“They are coastal bacteria … so [they] could well increase either as a direct result of oil degradation or as a side effect of the added nutrient levels.”
The ingredients are there for heightened concern, Oliver added. The carcasses of bacteria feeding off the oil will increase overall nutrient levels as sweltering summer temperatures hit their peak. While there are natural controls, like bacterial viruses and protozoa, that can check Vibrio growth, those can be overwhelmed, studies have shown. … “I think that combination could lead to very serious public health concerns,” Oliver said. …
Doug Bartlett, a microbiologist at the Scripps Institution of Oceanography:
“If the oil is killing all these marine animals and if the marine animals are highly compromised, would they be more likely to succumb to infectious disease?… I honestly don’t know what is going to happen with regard to the oil spill… It’s very likely in the heavily impacted areas to have a strong influence on the composition of microbial communities. But gosh, I just don’t have a good sense of where that all is going to go. … The lesson from that is that under high nutrient conditions, it may be that the Vibrio numbers would go up.”
www.nytimes.com...
One of the more pressing questions involves Vibrios, which, until the oil spill, were one of the primary threats to the region's vital shellfish business. While parahaemolyticus rarely causes serious disease, another Vibrio species, vulnificus, kills dozens of Americans each year, largely through seafood contamination. The disease, only recently discovered, has caused fierce debate between health officials and local Gulf politicians over raw oysters, the primary carriers of the disease.
Since Vibrio populations swell in the summer -- they love the heat -- this year there is a likely possibility, scientists say, that Vibrio growth could be further spurred, directly or indirectly, in response to the oil and the organic flotsam it has left behind.
"The question is: Will there be an inadvertent enhancement of the growth of these potential human pathogens?" said Rita Colwell, former director of the National Science Foundation and an expert in marine microbial life. "It's a question, and the answer is uncertain."
Death In The Gulf
By Ali schmidt
September 26, 2010
On June 17, 2010 The headlines from the New York Times read: “Will Bacterial Plague Follow Crude Oil Spill Along Gulf Coast?” At the time they were concerned about the bacteria Vibrio parahaemolyticus, a bacterium that causes food poisoning in many each year.. Vibrio Parahaemolyticus has a thirst for crude and thrives in the warm waters of the gulf. However, another Vibrio species, vulnificus, kills dozens of Americans each year, usually through seafood contamination. Microbiologists were uncertain which bacteria, feeding off the oil,were already growing exponentially in the Gulf – New York Times
Flash forward to local news reports across the Gulf;
Kenner Boy Dies Of Rare Bacterial Infection – WDSU News
“2nd Death Caused By Flesh Eating Bateria This Month” – KHOU News and another, “Six Die From Deadly Saltwater Bacteria! ” - West Orlando News
So what is Vibrio vulnificus? A few facts: Vibrio vulnificus is a gram negative proteobacteria found in marine and estuarine environments. Primarily isolated from sea water, and shellfish (oysters in particular) located in the Gulf Of Mexico, the Atlantic Coast and the U.S. West Coast. The bacterium thrives in warm seawater and is part of a group of Vibrio’s that are “moderate halophiles” meaning they require salt for growth.
Vibrio vulnificus is a proteobacteria and a pathogen of humans . It causes wound infections, gastroenteritis, or primary septicemia (blood poisoning). Vibrio vulnificus causes disease in individuals who eat contaminated seafood (raw or undercooked oysters or have an open wound that is exposed to seawater.
www.nsf.gov...
From the NSF website on June 21, 2010:
How are the oysters faring with the oil spill? The National Science Foundation (NSF) has awarded a rapid response grant to scientists Crystal Johnson, Gary King and Ed Laws of Louisiana State University (LSU) to find out.
The researchers will look at how the abundance and virulence of naturally-occurring bacteria called Vibrio parahaemolyticus and Vibrio vulnificus, often found in oyster beds, may change in response to the spill.
The findings will provide insights into vibrios’ ability to “consume” oil, and will allow the biologists to uncover antibiotic compounds in certain species of phytoplankton that live in association with vibrios.
“Adaptation to the spilled oil may result in an increase in some types of vibrios,” says Johnson. “We believe that vibrios will change in response to the stress of direct exposure to oil and/or to indirect effects of interactions with other species affected by oil.”
Vibrios… may even help break down the components of the oil.
“Little is known about how microbes–in the water, along coasts, and associated with other species–are affected by the spill,” says Phillip Taylor, acting director of NSF’s Ocean Sciences Division.
“Through this NSF rapid response grant, these scientists will be able to track the oil’s effects on marine species living in the Gulf, and by extension, the possible threat to human health.” …