Microtox measures the decrease in respiration, and subsequent light output, of the luminescent bacterium Vibrio fischeri as the toxic response. Vibrio fischeri is a non-pathogenic, gram-negative rod shaped bacterium inhabiting marine environments, frequently in symbiosis with squid and fish.
Microtox testing can be a rapid, cost-effective tool in assessing toxicity of effluents, sediments, leachates, soils, sludges, ground water and surface water. Test data can be available within as little as 30 minutes and numerous samples can be easily processed during a standard workday.
Microtox is most useful when the bacterial response correlates well with the response of standard test species (which may be required in compliance tests) or indigenous species within the receiving water or water body of concern.
Vibrio fisheri is a bioluminescent bacteria used in Microtox testing. Decreased bacterial light output is measured as the toxic response.