Fecal streptococci recoveries in different marine areas

Volterra, L; Bonadonna, Lucia; Aulicino, Francesca Anna

doi:10.1007/bf00283446

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…It is interesting to point out that SB and KF agars showed low selectivity, since the Aerococcus, Staphylococcus, and Vibrio species grew optimally. These results are not in agreement with those reported by several authors (5,7,28) who found that these media possessed the best selectivity performances. However, Yoshpe-Purer (29) found a good growth of V. alginolyticus and staphylococci in KF agar; these microorganisms when growing produce red colonies similar to those of fecal strep- tococci.…”

Section: Discussioncontrasting

confidence: 99%

“…The KAA agar proposed by Mossel et al (13) presents two promising advantages: (i) the results are available in 24 h and (ii) esculin hydrolysis can be observed directly on the filter. However, this medium presents a low capability of discrimination between typical and nontypical fecal streptococcal colonies (19,28) and very low specificity, allowing the growth of Staphylococcus, Pseudomonas, and Vibrio strains, whose colonies resemble those of fecal streptococci (5,26).…”

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Modification of kanamycin-esculin-azide agar to improve selectivity in the enumeration of fecal streptococci from water samples

Audicana¹,

Perales²,

Borrego³

1995

Appl Environ Microbiol

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Kanamycin-esculin-azide agar was modified by increasing the concentration of sodium azide to 0.4 g liter ؊1 and replacing kanamycin sulfate with 5 mg of oxolinic acid liter ؊1. The modification, named oxolinic acidesculin-azide (OAA) agar, was compared with Slanetz-Bartley and KF agars by using drinking water and seawater samples. The OAA agar showed higher specificity, selectivity, and recovery efficiencies than those obtained by using the other media. In addition, no confirmation of typical colonies was needed when OAA agar was used, which significantly shortens the time of sample processing and increases the accuracy of the method.

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Section: Discussioncontrasting

confidence: 99%

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confidence: 99%

Modification of kanamycin-esculin-azide agar to improve selectivity in the enumeration of fecal streptococci from water samples

Audicana¹,

Perales²,

Borrego³

1995

Appl Environ Microbiol

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“…In addition, it was higher when the pollution levels were high. In seawater, the specificity was lower than the specificities reported by other authors using the same medium (1,2,9,10).…”

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A fast method for the confirmation of fecal streptococci from M-enterococcus medium

Figueras

Inza

Polo

et al. 1996

Appl Environ Microbiol

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M-Enterococcus medium, used for the detection and enumeration of fecal streptococci from different types of water, demonstrated a very low specificity. We propose the transfer of membrane filters to bile-esculin medium as a confirmation technique. It has proved to be more reliable, faster to perform, and more effective than the random selection of colonies, which is recommended for confirmation in Standard Methods for the Examination of Water and Wastewater (A. E. Greenberg, L. S. Clesceri, and A. D. Eaton, ed., 1992).

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“…For example, Volterra et al ( 1986) found that different media, together with accompanying microbiota, can affect recovery of faecal streptococci from marine samples. However, in the present investigation, excluding the animal faeces samples, all of the isolates were found to be enterococci-which allowed enumeration and speciation comparisons between the studies.…”

Section: Comparison Of Species Identification Methodsmentioning

confidence: 99%

Characterisation of faecal streptococci from some New Zealand effluents and receiving waters

Sinton

Donnison²

1994

New Zealand Journal of Marine and Freshwater Research

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Different proportions of component species of faecal streptococci were found in New Zealand sewage, animal processing effluents, and animal faeces. Enterococcus faecium was the major species in raw sewage (43-65%), followed by E.faecalis (19-40%) or E. durans (14-23%). Meat processing effluent usually had a higher proportion of f. durans (37-73%) than sewage. Enterococci, mainly E. durans (34%), dominated in sheep faeces, but Streptococcus bovis comprised 53% of the faecal streptococci in cattle faeces. In sewagecontaminated groundwater, a survival pattern of E. faecalis > E. faecium > E. durans > S. equinus > S. bovis was predicted. The proportion of E. durans was low in rivers impacted by animal wastes, and decreased during treatment of sewage and meatworks effluent and after both effluents were mixed with sea water. Thus, superior survival of E. faecium and E. faecalis means that they are likely to be the dominant species in receiving waters, irrespective of whether the pollution is of human or animal origin. Faecal coliform : faecal streptococci/ enterococci ratios were similar in raw Received 7 September 1993; accepted 18 February 1994 sewage and meat processing effluents (generally > 3), but superior enterococcus survival caused a decrease in ratios in groundwater and sea water. Thus, these ratios are probably not useful in distinguishing between human and animal pollution sources in New Zealand receiving waters. M93047

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Fecal streptococci recoveries in different marine areas

Cited by 13 publications

References 18 publications

Modification of kanamycin-esculin-azide agar to improve selectivity in the enumeration of fecal streptococci from water samples

Modification of kanamycin-esculin-azide agar to improve selectivity in the enumeration of fecal streptococci from water samples

A fast method for the confirmation of fecal streptococci from M-enterococcus medium

Characterisation of faecal streptococci from some New Zealand effluents and receiving waters

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