Comparative study of the germs counting in milk onto the "standard" agar plates and the milk- tryptone-glucose agar, and incubated at temperatures of 32 to 37oC
PDF (Português (Brasil))

How to Cite

1.
Pestana BR, Lima E de. Comparative study of the germs counting in milk onto the "standard" agar plates and the milk- tryptone-glucose agar, and incubated at temperatures of 32 to 37oC. Rev Inst Adolfo Lutz [Internet]. 1942 Feb. 9 [cited 2024 Nov. 27];2(1):18-33. Available from: https://periodicos.saude.sp.gov.br/RIAL/article/view/33080

Abstract

The comparative study of about 398 samples of pasteurized milk planted on standard agar and Tryptone-glucose milk agar, incubated at 32°C. and 37°C, led to the following conclusions: 1. An increase in count was observed in 100 per cent of the samples when planted on Tryptone-glucose milk agar, instead of standard agar, both incubated at 32°C; 2. Incubation at 32°C. in combination with the use of Tryptone-glucose milk agar, resulted in increases in plate count of considerably greater magnitude than were obtained by the use of the agar and incubation at 37°; 3. The differences between the average of standard agar and Tryptone-glucose-milk-agar, at 37, and between the average of standard agar and milk agar, at 32°C, show very clearly that this difference is real and not occasional, thus proving the 'I'ryptone-glucose-milk-agar to be a more convenient medium for the growth of the germs contained in miIk than the standard agar. This growth is increased when there is used for the incubation of the plates, a temperature of 32° instead of 37°C.

https://doi.org/10.53393/rial.1942.2.33080
PDF (Português (Brasil))

References

1. - "Standard Methods of Milk Analyses ", 1934, pg. 16.

2. - SAFFORD, C. K and C. N. STARK- J. Dairy Sc., 1937, 20:577 e Am. Jour. Publ. health, 1936, 26:350.

3. - BREED, Robert S.- Amer. Jour. Publ. Health, 1935, 25:663.

4. - YALE, M. W. and Carl S. PEDERSON - Amer. Jour. Publ. Health, 1936, 26:344.

5. - BOWERS, C. S. and G. J. HUCKER - Amer. Jour. Publ. Health, 1936, 26:350.

6. - YALE, M. W. - Amer. Jour. Publ. Health, 1938, 28:148.

7. - ABELE, C. A. - Ame1·. Jour. Publ. Health, 1939, 29:821.

8. - "Standard Methods for the Examination of Dairy Products ", 1941, pg. 23.

9. - BREED, Robert S. and Carl S. PEDERSON - Amer. Jour. Publ. Health, 1932, 22:7 45.

10. - YALE, M. W., Carl S. PEDERSON .and Robert S. BREED - Jour. Bacteriology, 1933, 25:66.

11. - PEDERSON, Carl S. and M. W. YALE - Amm·. Jour. Publ. Health, 1934, 24:477.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright (c) 1942 Instituto Adolfo Lutz Journal

Downloads

Download data is not yet available.