A Text-book of General Bacteriology

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Saunders, 1918 - Bacteriology - 691 pages
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Page 634 - C. for 48 hours. For the purposes of enforcing any regulations which may be based upon these recommendations the following may be considered sufficient evidence of the presence of organisms of the Bacillus coli group: Formation of gas in fermentation tube containing original sample of water (a). Development of acid-forming colonies on lactose litmus agar plates or bright red colonies on Endo's medium plates, when plates are prepared as directed above under (6). The formation of gas, occupying 10...
Page 625 - Shake thoroughly, and with another sterilized pipette transfer 1 cc of this mixture to another 9 cc of sterile water and so on until the proper dilution has been obtained. The first dilution will be 1 : 10, the second 1 : 100 and so on.
Page 631 - If typical colonies have developed, select two and transfer each to a lactosc-broth-fcrmentation tube and an agar slant, both of which are to be incubated at 37 C. 2. If no typical B. coli colonies are found, incubate the plates another twenty-four hours.
Page 633 - C., shall not exceed 100 per cubic centimeter; provided, that the estimate shall be made from not less than two plates, showing such numbers and distribution of colonies as to indicate that the estimate is reliable and accurate. 2. Not more than one out of five 10 cc. portions of any sample examined shall show (by the method of. the Public Health Service) the presence of organisms of the bacillus coli group.
Page 119 - Cells without organs of motion . . 1. Bacterium. Cells with organs of motion (flagella). a. Flagella distributed over the whole body 2. Bacillus. b. Flagella polar 3. Pseudomonas. 3.
Page 569 - No dealer in milk, and no servant or agent of such a dealer, shall sell, exchange, or deliver, or have in his custody or possession with intent to sell, exchange, or deliver, milk from which the cream or any part thereof has been removed, unless in a conspicuous place above the center upon the outside of every vessel, can, or package from which such milk is sold, the words "skimmed milk" are distinctly marked in letters not less than one inch in length.
Page 376 - ... which it attends to at least twice a day — it is anchored to the clothing by the claws of one or more of its six legs. Free lice on the skin are rarely found, while the underside of the shirt often is alive with them. The life-cycle of the insect, as indicated by the experiments of Warburton. is as follows: Incubation period: eight days to five weeks. From larva to imago: eleven days. Nonfunctional mature condition: four days. Adult life: male, three weeks; female, four weeks The following...
Page 168 - Cell receptor of the third order — an amboceptor; e, one of the haptophores of the amboceptor, with which some food substance or product of bacterial disintegration...
Page 634 - ... broth fermentation tube in order to demonstrate more fully the extent of pollution in grossly polluted samples. 4. It is recommended that in the above-designated tests the culture media and methods used shall be in accordance with the specifications of the Committee on Standard Methods of Water Analysis of the American Public Health Association, as set forth in Standard Methods of Water Analysis (APHA, 1912).
Page 119 - I. Cells globose in a free state, not elongating in any direction before division into 1, 2, or 3 planes . . .1.

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