Notes on the Determination of B. Coli in Water

Longley, Francis F.; Baton, W. U. C.

doi:10.1093/infdis/4.3.397

Cited by 6 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this country Bennett and Pammel (1896) showed that the gas formed in the Smith tube is at first only H2 and that the ratio between H2 and C02 depends mainly on the absorption of CO2 by the liquid medium; and Longley and Baton (1907) made clear the slight value of measurements of the amount of gas and the ratio of its components in the open tube. Keyes (1909) and…”

Section: The Chemistry Of the Fermentative Reactions Of The Colon-typmentioning

confidence: 97%

Studies on the Classification of the Colon-Typhoid Group of Bacteria With Special Reference to Their Fermentative Reactions

1919

View full text Add to dashboard Cite

Section: The Chemistry Of the Fermentative Reactions Of The Colon-typmentioning

confidence: 97%

Studies on the Classification of the Colon-Typhoid Group of Bacteria With Special Reference to Their Fermentative Reactions

1919

View full text Add to dashboard Cite

“…Klein andHouston (1899-1900, p Houston (1904, p. 105) says " The picking out of the coli-like colonies for study in pure culture is after all, even to the expert, a speculative venture. " Longley and Baton (1907) in a paper on the determination of B. coli in water say " On account of the insignificant value of the test for liquefaction of gelatine in the examination of the Potomac water......it may hereafter be omitted from our routine examinations without introducing any appreciable error. "…”

Section: Motilitymentioning

confidence: 99%

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

MacConkey

1909

J. Hyg.

View full text Add to dashboard Cite

In a previous paper (1906) I entered a plea for the use of certain tests in the bacteriological examination of waters and food stuffs as it seemed we should thus be enabled to better differentiate the lactose-fermenting bacilli. Such differentiation seems necessary because of the importance attached to B. coli as an indicator of faecal contamination, and because of the differences of opinion which exist as to the characters which justify us in identifying a bacillus as B. coli.

show abstract

“…In an examination of 176 'surface waters in eastern Massachusetts, using lactose bile and dextrose broth in parallel for preliminary enrichment, the authors obtained 64 positive results by the former method against 70 by the latter. Longley and Baton (1907), from their work on Potomac water, concluded that "the value of the test with the bile lactose on unpolluted or slightly polluted water, such as we have to deal with the greater part of the time, is uniformly less than with dextrose broth, except in the larger quantities of water.…”

Section: Methods Foe the Isolation Of The Colon Bacillusmentioning

confidence: 99%

“…More recently, Longley and Baton (1907), in one of the ablest and most fruitful of recent contributions to water bacteriology, have made it clear that neither of these quantitative determinations is of importance. They show, first, that the total amount of gas formed by B. coli varies w idely, from 10 to 80 per cent, the mode of the curve being found not at 50 but at 35 per cent.…”

Section: Reduction Of Nitratesmentioning

confidence: 99%

“…On the other hand, it is equally true that in a large proportion of cases colon bacilli are isolated from positive dextrose-broth tubes. Longley and Baton (1907) Gage (1902), in the Massachusetts work cited above, found that 70 per cent of his fermented dextrose tubes contained B. coli. (Whipple, 1907).…”

Section: On the Other Hand Weissenfeld' S Work Entirely Fails Tomentioning

confidence: 99%

See 1 more Smart Citation

Elements of water bacteriology, with special reference to sanitary water analysis

Prescott¹,

Winsløw²

1908

View full text Add to dashboard Cite

Elements of Water Bacteriology.Certain bacteriologists have held that the toxic waste products of the bacteria themselves may render water unfit for their own development. Horrocks (Horrocks, 1901), Garr^(Garrd, 1887), Zagari (Zagari, 1887), and Freudenreich (Freudeiureich, 1888) have shown that an "antagonism" exists when bacteria are grown in artificial culture media such that the substratum which has supported the growth of one form may be rendered antiseptic to another. Frost (1904) has exhaustively studied the phenomenon of antagonism by exposing typhoid bacilli in collodion sacs to the action of certain soil and water bacteria growing in broth. Artificial culture media, however, offer conditions for bacterial development which are scarcely paralleled in natural waters. It is difl&cult to believe that under ordinary conditions poisons are produced of such power as to render a stream or lake specifically toxic for any particular type of bacteria. It appears indeed from the experiments of Jordan, Russell and Zeit (1904), and Russell and Fuller (1906), which will shortly be referred to more fully, that the life of typhoid germs is shorter in water containing large numbers of other bacteria than in that of greater pinrity.Horrocks (1899), too, found freshly isolated typhoid bacilli alive in sterile sewage after sixty days; ' while they disappeared in five days when B. coli was also present. These phenomena may be due, however, to a struggle for oxygen, or for food, rather than to the assumed presence of highly toxic bacterial products of which there is no independent evidence.

show abstract

Notes on the Determination of B. Coli in Water

Cited by 6 publications

References 0 publications

Studies on the Classification of the Colon-Typhoid Group of Bacteria With Special Reference to Their Fermentative Reactions

Studies on the Classification of the Colon-Typhoid Group of Bacteria With Special Reference to Their Fermentative Reactions

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

Elements of water bacteriology, with special reference to sanitary water analysis

Contact Info

Product

Resources

About