Abel's laboratory handbook of bacteriology / [Rudolf Abel].

  • Abel, Rudolf Velentine Ludwig, 1868-
Date:
[1912?]
Catalogue details

Licence: In copyright

Credit: Abel's laboratory handbook of bacteriology / [Rudolf Abel]. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    to pour ofF the water. Repeat this procedure several times ; then add to the flask sterile water, shake the flask and pour oS the water. This should be repeated several times. Finally, add 900 c.c. of sterile water to the flask, shake it repeatedly, and proceed on exactly the same lines as before to examine the liquid (called the final' washings'). During the process of washing, any simple device, such as holding a piece of sterile wire gauze over the mouth of the flask will prevent loss of small floating pieces of cress. As the final 'washings' liquid is examined in exactly the same way as the first washings, it is unnecessary to repeat what has been already described. Mention has only been made so far of the B. coli test, ljut of course the first and final ' washings ' of the cress may be examined by the strejDtococcus, B. enteritidis sporogenes, or other tests. Known quantities of the cress may also be added directly to primary liquid cultures, the subsequent procedure being on the lines already indicated. Sewage and Sewage Effluents. The method by which these materials are examined bacteriologically is similar to that practised in the case of water, but in the present instance dilution is carried further. Detection of specific pathogenic bacteria in sewage is not easy by cultural methods at present available, and so far the animal experiment would appear to have afforded the best positive results. By this method Houston succeeded in demonstrating anthrax in the coke beds and septic tank sludge at the sewage works of a town where a number of tanneries are