Differential effects of temperature and starvation on induction of the viable- but-nonculturable state in the coral pathogens Vibrio shiloi and Vibrio tasmaniensis

Article Abstract:

The induction of the viable-but-nonculturable (VBNC) state was compared in two Vibrio spp. isolated from diseased corals by starving the cells and maintaining them in artificial seawater. It was found that in Vibrio tasmaniensis the VBNC state was not induced by incubation at 4 degree Celsius after 157 days whereas V. shiloi was induced into the VBNC state by incubation at 4 degree Celsius after 126 days. Results suggest that viable V. shiloi could successfully persist in the VBNC state in seawater for significant periods at the lower temperatures.

Physiological aspects, Genetic aspects, Corals

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Efficacy of vaporized hydrogen peroxide against exotic animal viruses

Article Abstract:

Vapor-phase hydrogen peroxide was used to decontaminate laboratory equipment exposed to animal viruses exotic to Canada. The virus titer was minimized to 0 embryo-lethal doses for avian influenza and Newcastle disease viruses and to less than 10 tissue culture infective doses for exotic mammalian viruses. The equipment subjected to the gas did not exhibit any side effects. Vaporized hydrogen peroxide was found to be suitable for decontaminating objects from biocontainment level III facilities.

Research, Viruses, Hydrogen peroxide, Virus inactivation

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Concentrations of pathogens and indicators in animal feces in the Sydney watershed

Article Abstract:

A fecal analysis survey was undertaken to quantify animal inputs of pathogenic and indicator microorganism in the temperature watersheds of Sydney, Australia. The analysis showed that the pathogen and fecal indicator concentrations were generally higher in the domestic feces than in wildlife feces.

Australia, Environmental aspects, Sydney, Australia, Watersheds, Stool specimen analysis

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