Results 261 to 270 of about 132,559 (302)

Indicator bacteria in freshwater and marine molluscs

Hydrobiologia, 1984
The freshwater mussel Anodonta cygnea and four marine shellfish (mussels, Mytilus edulis; cockles, Cerastoderma edule; clams, Mya arenaria; Scrobicularia plana) from a total of six sites were surveyed for Escherichia coli, Clostridium perfringens, faecal streptococci, 25 and 37 °C coliforms, 25 °C and 37 °C total viable numbers and fluorescent ...
Mohemid M. Al-Jebouri, D. R. Trollope
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Bacteriophages and indicator bacteria in human and animal faeces

Journal of Applied Bacteriology, 1986
In an attempt to explain the presence of F‐specific (RNA) bacteriophages in waste‐water, faecal material from humans and a variety of animals was examined. The phages were detected in appreciable numbers only in faeces from pigs, broiler chickens, sheep and calves but not from dogs, cows, horses and humans. Parallel examinations for somatic coliphages,
Arie H. Havelaar, W. M. Hogeboom, K. Furuse   +2 more
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Anaerobic bacteria as indicators of faecal pollution

Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences, 1980
SynopsisIn several well-authenticated instances intestinal pathogens, includingSalmonellaspecies, have been isolated from water in the absence of bacteria, such asEscherichia coli,commonly used to detect faecal pollution. The present study examines certain anaerobic, non-sporing commensals of the intestinal tract as alternative ‘indicator’ bacteria ...
A.A. Opara, D.D. Mara, P. Singleton, D.W.F. Wheater   +3 more
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Dormant bacteria in lake sediments as palaeoecological indicators [PDF]

Journal of Paleolimnology, 1992
Lake sediments contain viable allochthonous bacteria that can be cultured and used for palaeoecological studies. To be a good palaeoindicator, a bacterium must be able to survive in sediments for long periods of time, but also be unable to reproduce in the lake bottom.
Mats Nilsson, Ingemar Renberg
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Health-indicator bacteria in water-surface microlayers

Canadian Journal of Microbiology, 1978
The distribution patterns of a variety of bacteria in the surface microlayer, 20 cm and 100 cm below the surface of rivers, open lake waters, and off docks are presented. Implications of this three-season study are that conventional sampling techniques underestimate the true microbiol densities.
B. J. Dutka, K. K. Kwan
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A method for the determination of cellulose destroying indices of bacteria [PDF]

Proceedings / Indian Academy of Sciences, 1949
A simple method has been described for determining the cellulose destroying indices of bacteria. The method may be employed in assessing the efficiency of rotproofing agents against bacterial deterioration.
A. N. Mukerjee, B. B. L. Saxena, S. R. Sen Gupta   +2 more
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Current Concepts of Indicator Bacteria

1977
Pathogenic bacteria excreted in human feces are found in low counts in wastewater and are known to be more sensitive to environmental conditions than Escherichia coli. The latter, excreted both by humans and warm-blooded animals, are used as an indicator of fecal wastes which may contain the pathogen, but the validity of this practice is often ...
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Guidelines for indicator bacteria in waters: uncertainties in applications

Environmetrics, 1999
Microbiological water quality guidelines have been established in most countries to protect the users from the risk of waterborne diseases. A guideline requires that a minimum number of water samples be collected during a period of time and analysed for an indicator organism.
J. Marsalek, Abdel H. El-Shaarawi
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[25] Luminous bacteria as an oxygen indicator

1978
Publisher Summary This chapter discusses luminous bacteria as oxygen indicators. The high oxygen affinity of the luminous system of the bacteria does not reside in any special speed of reaction of the luciferase system with oxygen over and above that of cytochrome oxidase; it relies specifically upon the low turnover number of the system.
R. Oshino, B. Chance
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Indicator bacteria and limnological parameters in fish ponds

Water Research, 1994
Abstract The populations of indicator bacteria (mesophilic, coliform and fecal streptococci) together with relevant limnological parameters (temperature, oxygen, BOD and chlorophyll-α) were recorded during a 6 year study of three eutrophic ponds. Ecosystems were manipulated with fish (Cyprinus carpio) in 2-year management cycles: in spring of the ...
Ruẑena Markošová, Josef Jeẑek
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