Further Observations on the Differentiation of Lactose-fermenting Bacilli, with special reference to those of Intestinal Origin

MacConkey, Alfred

doi:10.1017/s0022172400016156

Cited by 44 publications

(11 citation statements)

References 9 publications

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“…They indicated (5) that as of 1 October 1977 the Center for Disease Control would report indolepositive strains as K. oxytoca. This species designation is in keeping with suggestions made by various workers (1,3,17,19,21,24,25,35,39) since as early as 1886 (16). A neotype strain for the species (K. oxytoca ATCC 13182) has been proposed by the International Committee on Systematic Bacteriology Subcommittee on Taxonomy of Enterobacteriaceae (4).…”

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confidence: 80%

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Fermentation of polysaccharides by Klebsielleae and other facultative bacilli

Ochuba¹,

Riesen²

1980

Appl Environ Microbiol

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Fermentations of 10 polysaccharides by species of the family Enterobacteriaceae were examined. Algin, guar, karaya, xanthan, and xylan were not fermented by any of the strains tested. Most of the activity was found in the tribe Klebsielleae. Klebsiella oxytoca fermented amylopectin (97% of the strains studied), carrageenan (100%), inulin (68%), polypectate (100%), and tragacanth (100%). Klebsiella pneumoniae fermented amylopectin (91%), carrageenan (100%), and tragacanth (86%). Carrageenan was also fermented by Enterobacter aerogenes (100%), Enterobacter agglomerans (63%), Enterobacter cloacae (95%), and Pectobacterium (38%). Pectobacterium shared polypectate fermentation (100%) with K. oxytoca. With one exception, Serratia strains were negative on all polysaccharides. These results, along with other evidence, indicate that (i) the genus Klebsiella is biochemically the most versatile genus of the tribe, (ii) because of its distinct characteristics, K. oxytoca warrants species designation separate from K. pneumoniae, and (iii) some food additives generally considered indigestible can be metabolized by a few species of facultative bacilli, whereas others appear to be resistant.

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confidence: 80%

“…All other species tested were negative for inulin. Thus, it appears that, except for a small percentage of strains of K. pneumoniae which ferment inulin slowly, inulin fermentation is a characteristic of K. oxytoca, as suggested by earlier workers (22,24,25,27).…”

Section: Discussionsupporting

confidence: 53%

Fermentation of polysaccharides by Klebsielleae and other facultative bacilli

Ochuba¹,

Riesen²

1980

Appl Environ Microbiol

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“…42,44 In fact, various classification schemes for coliforms have been emerged. The earliest were those of MacConkay, 45 who recognized 128 different coliform types, while Bergey and Deehan identified 256. 46 By the early 1920s, differentiation of coliforms had come to a series of correlations that suggested indole production, gelatin liquefaction, sucrose fermentation and Voges-Proskauer reaction were among the more important tests for determining faecal contamination.…”

Section: Scientific Classification Of Escherichia Colimentioning

confidence: 99%

Escherichia coli as an indicator of bacteriological quality of water: an overview

Odonkor

Ampofo

2013

Microbiol Res (Pavia)

325

192

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Monitoring the microbiological quality of drinking water relies largely on examination of indicator bacteria such as coliforms, Escherichia coli, and Pseudomonas aeruginosa. E. coli is a member of the faecal coliform group and is a more specific indicator of faecal pollution than other faecal coliforms. Two key factors have led to the trend toward the use of E. coli as the preferred indicator for the detection of faecal contamination, not only in drinking water, but also in other matrices as well: first, the finding that some faecal coliforms were non faecal in origin, and second, the development of improved testing methods for E. coli. The faecal coliform definition has also been revised to coincide better with the genetic make-up of its members and now includes newly identified environmental species. As a result, faecal coliforms are increasingly being referred to as thermotolerant coliforms. This, combined with improved detection methods for E. coli, has started a trend toward the use of E. coli in place of thermotolerant coliforms as a more reliable indicator of faecal pollution in drinking water. At present, E. coli appears to provide the best bacterial indication of faecal contamination in drinking water. This is based on the prevalence of thermotolerant (faecal) coliforms in temperate environments as compared to the rare incidence of E. coli, the prevalence of E. coli in human and animal faeces as compared to other thermotolerant coliforms, and the availability of affordable, fast, sensitive, specific and easier to perform detection methods for E. coli.

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“…pneumoniae (1,2,8,14,16). Over the years, from MacConkey (12) to Lautrop (11) to Hugh (7) to Stenzel et al (161, the combination of gelatin liquefaction and indole formation has been used to identify members of the "Oxytocum" group; however, the gelatin reactions of these strains in stab cultures may be considerably delayed, as much as 4 to 11 weeks (11). In this paper is reported a characteristic, pectinolysis, which is more rapidly determined, more consistently produced, and taxonomically more significant than gelatin liquefaction for the identification of the indole-positive strains of K .…”

mentioning

confidence: 99%

Pectinolytic, Indole-Positive Strains of Klebsiella pneumoniae

Riesen

1976

International Journal of Systematic Bacteriology

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Further Observations on the Differentiation of Lactose-fermenting Bacilli, with special reference to those of Intestinal Origin

Cited by 44 publications

References 9 publications

Fermentation of polysaccharides by Klebsielleae and other facultative bacilli

Fermentation of polysaccharides by Klebsielleae and other facultative bacilli

Escherichia coli as an indicator of bacteriological quality of water: an overview

Pectinolytic, Indole-Positive Strains of Klebsiella pneumoniae

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