Classification of the B. Coli Group.

Jackson, Daniel D.

doi:10.2105/ajph.1.12.930

Cited by 4 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jackson (Jackson and Melia, 1909), the principal exponent of this procedure, recommends that sterilized undiluted fresh ox gall (or an II per cent solution of dry fresh ox gall) containing i per cent of peptone and i per cent of lactose be made up in 40 c.c. amounts in fermentation tubes to which varying amounts of water, up to 10 c.c.…”

Section: It Wasmentioning

confidence: 99%

Elements of Water Bacteriology: with Special Reference to Sanitary Water Analysis

1925

Nature

View full text Add to dashboard Cite

The contrast between the two classes of rivers is well brought out in a study of the Lahn and the Wieseck, by Kisskalt (1906); and the table below, compiled from his data, gives an excellent idea of the total numbers of bacteria and their seasonal fluctuations in a stream of fair quality (the Lahn) and a highly polluted one (the Wieseck).In the former case the bacterial numbers are highest when rain brings surface pollution; in the latter, when the sewage constantly present is least diluted. MONTHLY VARIATIONS OF BACTERIA IN A NORMAL AND POLLUTED STREAM Kisskalt, 1906 Date. Bacteria per c.c. Date.

show abstract

Section: It Wasmentioning

confidence: 99%

Elements of Water Bacteriology: with Special Reference to Sanitary Water Analysis

1925

Nature

View full text Add to dashboard Cite

show abstract

“…Jackson (1911) suggested a further differentiation of the lactose fermenting bacilli-an elaboration of MacConkey's original scheme-in which he used the fermentation of raffinose and mannite, as well as the sucrose-dulcite tests. He believed that the so-called typical B. coli does not exist as such, but that the entire group indicates faecal contamination when water or milk examinations are to be considered.…”

mentioning

confidence: 99%

B. colias an Index of Faecal Pollution of Water Supplies

Bardsley

1926

J. Hyg.

View full text Add to dashboard Cite

THE quantitative determination of B. coli in a given sample of water has long been accepted as affording a good measurement of the probability of recent contamination with excreta.The systematist uses the term B. coli to define a single definite type; but the sanitary bacteriologist, who is not concerned with botanical classifications, places a much broader interpretation upon it and includes a whole group of organisms under this heading; yet most workers agree that a bacillus of this class should have the following characteristics-a short bacillus with rounded ends, Gram negative, non-sporing and a facultative anaerobe. It should ferment lactose and dextrose with the production of acid and gas, give a clot in milk, fail to liquefy gelatine, and produce indol in a medium containing peptone.It has been known for some time that organisms of the B. coli group may be present in soil and on grain where there has been little apparent opportunity for faecal pollution, and recent investigations have yielded evidence indicating that certain cultural reactions are highly correlated with different natural habitats. It has therefore become possible, by the use of laboratory tests, to assign an excretal or non-excretal origin to a given strain of B. coli with a reasonable degree of probability.Early conceptions of B. coli.Bacilli of the colon group were first isolated in 1885 by Escherich in the course of his investigations on the organisms in the faeces of young children. He described B. coli as a Gram negative bacillus producing characteristic colonies on gelatine, agar and potato, coagulating milk, and forming gas in glucose.Several bacteriologists, including Dyar and his co-workers (1894)-who used the cultural characteristics on agar, gelatine and potato, the reduction of nitrates and the clotting of milk as differential tests-have shown that B. coli is normally present in the intestines of goats, pigs, rabbits and other animals; and Kruse (1894) pointed out that the term "B. coli" applies not to a single type but to a whole group of organisms which is very widely distributed.Laurent (1899), while investigating certain diseases of potato, noted the occurrence of a bacillus which on testing proved to be of the colon type-a facultative anaerobe, incapable of liquefying gelatine, but able to reduce nitrates, produce a clot in milk and give acid and gas in glucose and in lactose broth. He cultivated these organisms on plants which had received large amounts of chalk, and also on potatoes which had been immersed in alkaline solution, and he found that B. coli tended to become parasitic when the resistance of the tubers had been artificially reduced in this way.

show abstract

A STUDY OF THEB. COLIGROUP WITH SPECIAL REFERENCE TO THE SEROLOGICAL CHARACTERS OF THESE ORGANISMS

Mackie¹

1921

Transactions of the Royal Society of South Africa

View full text Add to dashboard Cite

The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http://www.tandfonline.com/page/termsand-conditions * B. proteus : Gram-negative, motile, &robic, non-sporing baoilli, growing well at 37O C., showing a tendency t o "spreading" type of growth, fermenting glucose with or without gas, not fermenting lmtose, dulcite or mannite, varying in fermentation of sacoharose and in indol formation, liquefying rapidly gelatin or solidified serum.

show abstract

Classification of the B. Coli Group.

Cited by 4 publications

References 4 publications

Elements of Water Bacteriology: with Special Reference to Sanitary Water Analysis

Elements of Water Bacteriology: with Special Reference to Sanitary Water Analysis

B. colias an Index of Faecal Pollution of Water Supplies

A STUDY OF THEB. COLIGROUP WITH SPECIAL REFERENCE TO THE SEROLOGICAL CHARACTERS OF THESE ORGANISMS

Contact Info

Product

Resources

About