Serum and vaccine therapy : bacterial therapeutics and prophylaxis, bacterial diagnostic agents / [Richard Tanner Hewlett].

  • Hewlett, R. Tanner (Richard Tanner), 1865-1940.
Date:
1910
Catalogue details

Licence: In copyright

Credit: Serum and vaccine therapy : bacterial therapeutics and prophylaxis, bacterial diagnostic agents / [Richard Tanner Hewlett]. Source: Wellcome Collection.

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    (‘ Gioddu/ B. sardous), in Turkey and the near East, in Egypt (' Leben,’ Streptohacillus lehenis), in Armenia (' Mazun,’ B. maztcn), in India (‘ Dadhi ’)d and in South Africa. The various bacilli present in these sour milks all belong probably to one species, though they show some variation and form different races.2 The B. hvilgaricus is a large, non-motile, non-sporing. Gram-staining organism, growing best in milk and culture-media prepared with milk or whey, and producing a relatively large amount of lactic acid. It is invariably associated in the sour milks with a lactic streptococcus. On these facts, the use of artificially prepared soured milks has been based. For the prepara- tion of soured milk, the milk should be well sterilised by actual boiling for at least half an hour, preferably for an hour. It is then cooled to 40° C. (105° F.), inoculated with the lactic culture, and incubated at this temperature for twelve to twenty hours. Milk properly prepared should be well curdled without much separation of the whey, and possess a pleasant acid odour and an acid flavour. Complete sterilisation of the milk to be treated ' See Hewlett, Nature. April 7, 1910, p. 159. - See Hewlett, Brit. Med. Journ. 1910, ii. (Bibliog.).