Effect of low temperature on starvation-survival of the eel pathogen Vibrio vulnificus biotype 2

Article Abstract:

The eel pathogen Vibrio vulnificus biotype 2 survives for nearly two months in artificial seawater (ASW) at low temperatures in a nonculturable but viable state. The cells regain culturability when the temperature is increased to 15 degrees celsius (C). The cultured cells are infectious in eel and mice. The bacteria survives in a free-living form in ASW at 25 degrees celsius. An aquatic environment helps in the transmission of the pathogen. The pathogen is able to survive away from its host. It multiplies under favorable conditions in marine water until it is ready to cause infection.

Bacteria, Pathogenic, Pathogenic bacteria, Microorganisms, Temperature effects

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Resuscitation of Vibrio vulnificus from the viable but nonculturable state

Article Abstract:

The efficiency of Vibrio vulnificus cells to resuscitate from the viable but nonculturable (VNBC) state was analyzed to determine effects of the nutrient media. The ability of Vibrio vulnificus cells to resuscitate from the VNBC state after a temperature upshift was inhibited by the addition of nutrients to the culture media. Furthermore, Vibrio vulnificus cells exhibited true resuscitation from the VNBC state instead of the regrowth of undetected culturable cells following a temperature upshift.

Physiological aspects, Gram-negative bacteria, Microbial populations, Cell culture, Tissue culture

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In vivo resuscitation, and virulence towards mice, of viable but nonculturable cells of Vibrio vulnificus

Article Abstract:

The Vibrio vulnificus cells present in the viable but nonculturable (VBNC) state are poisonous for some period resulting in fatal infections and necessitating subsequent in vivo resuscitation. The toxicity of the cells reduces with influxing in the VBNC state. A nonculturable state of the bacteria is possible in 7 days by a downshift temperature of 5 degree centigrade. The virulence test is performed using an iron overload mouse model.

Observations, Virulence (Microbiology), Resuscitation

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