Some factors affecting the survival of coliform bacteria in seawater

Ogawa, Kazunari

doi:10.1007/bf02112893

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…It was reported that lowered nutrient availability reduced the activity of heterotrophic bacteria in the seawater (Delille et al 1988, Delille andPerret 1989). Ogawa (1974) EurAsian Journal of BioSciences purification" or "anti-biosis" action of seawater and showed that this organism decreased mainly because of their starvation caused by lack of nourishment. In our preliminary experiment (data not shown) A. junii was incubated in autoclaved Adriatic seawater.…”

Section: Resultsmentioning

confidence: 98%

Survival of Escherichia coli and Acinetobacter junii at various concentrations of sodium chloride

Hrenović¹,

Ivanković²

2009

EurAsia J BioSci

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The survival of two heterotrophic bacteria in conditions of various concentrations of NaCl was tested. Both bacteria can commonly enter marine environments through sewage or wastewater treatment plant effluents; the Escherichia coli is a common enteric bacterium and Acinetobacter junii is a phosphate-accumulating bacterium inhabiting activated sludge. When cultivated in nutrient rich media (COD 8700 mg O 2 L -1 ), both bacteria were multiplying during 72 h at concentrations of NaCl up to 5% for E. coli and 3.5% for A. junii. Total die-off of E. coli was detected at 72 h by NaCl concentration of 20%. Total die-off of A. junii was detected at 72 h by NaCl concentration of 10%. When the same bacteria were cultured in nutrient depleted media (COD 90 mg O 2 L -1 ), the multiplication of E. coli stopped at 3.5% of NaCl and higher, but the cells were able to survive for longer period of time at extreme NaCl concentrations of 20 and 30%. The negative influence of NaCl to A. junii was pronounced in conditions of organic matter shortage and rapid die-off was observed at 3.5% of NaCl and higher. Both bacteria seemed to be osmotolerant when cultured in nutrient-rich media, but not in nutrient-depleted media.

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Section: Resultsmentioning

confidence: 98%

Survival of Escherichia coli and Acinetobacter junii at various concentrations of sodium chloride

Hrenović¹,

Ivanković²

2009

EurAsia J BioSci

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“…In laboratory experiments, using natural seawater, the concentration of E. coil was shown to decrease because of starvation. Interestingly, the addition of nutrients resulted in floc formation, followed by adsorption of the cells onto suspended particles, with concomitant precipitation [121]. Ogawa suggested that precipitation was a factor in the 'disappearance' of coliforms in coastal waters, and that, in sediment, these bacteria survive longer because of the higher concentrations of nutrients present in sediment.…”

Section: 'Die-off Of Indicator Bacteria In Sea Watermentioning

confidence: 99%

Indicator organisms for estuarine and marine waters

Elliot¹,

Colwell

1985

FEMS Microbiology Letters

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The use of indicator organisms for estuarine and coastal waters has been reviewed. The natural flora of the environment must be considered in selecting an indicator organism, but, more importantly, recent work which shows a viable but non‐recoverable stage of pathogens entering the marine environment demonstrates that the conventional detection of indicator microorganisms is misleading, if not inaccurate. Results suggest that the newly developed epifluorescent/immunofluorescent direct detection of pathogens in the environment may be the most reliable method for determining public health hazards in marine and estuarine waters.

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