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Ecology and Virulence Capabilities of Vibrios Isolated from the Pristine North Inlet Estuary
Başlık:
Ecology and Virulence Capabilities of Vibrios Isolated from the Pristine North Inlet Estuary
Yazar:
Klein, Savannah Leigh, author.
ISBN:
9780438112148
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (131 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Advisors: Charles R. Lovell Committee members: Alan Decho; Robert Friedman; Sean Norman; Jay Pinckney.
Özet:
Vibrio bacteria are Gram negative, motile organisms that occur naturally in most coastal and estuarine ecosystems. Some vibrios are important human pathogens, including Vibrio parahaemolyticus and Vibrio vulnificus. The CDC estimates that these two species cause 80,000 cases of disease (vibriosis) each year in the United States alone. Most cases are caused by V. parahaemolyticus, which infects humans after the consumption of contaminated raw or undercooked seafood, primarily oysters. V. parahaemolyticus causes mild gastroenteritis that is self-limiting unless the patient is immunocompromised. V. vulnificus has a much lower incidence of disease (100 cases in the USA yr-1); however, this organism causes much more severe infections, including necrotizing fasciitis (flesh eating disease) and sepsis when introduced into an open wound. With global climate change, Vibrio outbreaks are expanding in size, frequency, and latitude. This investigation examined the reliability of using "species specific" marker genes to identify a Vibrio strain, the distribution of pathogenicity islands (PAIs) within Vibrio genomes, and the distributions of potential pathogenic V. parahaemolyticus within oysters and oyster tissues. We determined that some oysters, designated as "hot" oysters, can harbor significantly more vibrios than surrounding oysters. These "hot" oysters, which occur at low frequency, may explain the sporadic (and difficult to predict) nature of V. parahaemolyticus infections. The cytotoxic effects of environmental Vibrio strains and the interactions of vibrios with various marine microalgae were also studied.
Notlar:
School code: 0202
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
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