Persistence of Vibrio vulnificus in tissues of Gulf Coast oysters, Crassostrea virginica, exposed to seawater disinfected with UV light
Article Abstract:
The effect of ultraviolet (UV) depuration was determined on Vibrio vulnificus associated with the oyster Crassostrea virginica. Two hours of UV treatment was bactericidal for pure cultures of the bacterium. In contrast, the bacterium persisted at 1,000 to 10,0000 cells per ml for three days when oysters containing the natural population of bacterium were present in the depurated seawater. After three days of UV treatment, the bacterial distribution increased progressively in the mantle, hemolymph and digestive tract. A temperature of 15 degrees centigrade was found inhibitory both in seawater and oyster tissues treated and untreated with UV.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1992
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Viability of Vibrio vulnificus in association with hemocytes of the American Oyster (Crassostrea virginica)
Article Abstract:
Measurement of extracellular viability and intracellular viability of opaque and translucent colonial Vibrio vulnificus associated with phagocytic oyster hemocytes reveals that the levels of phagocytosis and bactericidal degradation of the opaque isolates are lower than those of the translucent morphotype. Encapsulation plays a role in the resistance to hemocytes-induced ingestion and degradation. V. cholerae and E. coli exhibit higher rates of intracellular death compared to the opaque V. vulnificus isolate. V. vulnificus-inoculated hemocyte monolayers exhibit similar levels of lysozyme activity and acid phosphatase activity.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1995
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Effects of physicochemical factors and bacterial colony morphotype on association of Vibrio vulnifucus with hemocytes of Crassostrea virginica
Article Abstract:
The relation of Vibrio vulnificus to phagocytic oyster hemocytes was investigated. Experiments were conducted with time, temperature, bacterial concentration, hemolymph pretreatment and V. vulnificus translucent and opaque colony morphotypes as its parameters. The utility of these cellular interactions for understanding the retention of this bacterium in oyster tissues and its ecology in estuarine environments were demonstrated.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1993
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