Skip to main content Accessibility help

Studies on the laboratory soiling of milking equipment

  • Branca Bačić (a1), Christina M. Cousins (a1) and L. F. L. Clegg (a1)


A laboratory method has been developed for studying the action of chemical disinfectants on milking equipment using a wet film and both metal and rubber surfaces. It was shown that milking machines may be soiled as effectively with fresh milk of low bacterial content as with aged milk of high bacterial content. When a single heat treatment preceded the soiling with milk and subsequent treatment with detergent and chemical disinfectant, a build-up of bacteria began on the third day. However, when the surfaces were heat treated daily 18 h before soiling, followed by cleaning and disinfection, no build-up occurred. These findings support the hypothesis that contamination of milk results from bacteria developing on the milking equipment and not merely from those added to it at each milking. The sites of bacterial contamination were shown to be the under surfaces of lid gaskets and the joints of the short milk tubes and the metal clawpiece nipples.



Hide All
American Public Health Association (1960). Standard Methods for the Examination of Dairy Products. 11th edn.New York: Am. Publ. Hlth Assn., Inc.
Bačić, B. & Clegg, L. F. L. (1967). Milchwissenschaft 22, 615.
Bačić, B., Jackson, H. & Clegg, L. F. L. (1968). J. Dairy Sci. 51, 47.
Claydon, T. J. (1953). J. Dairy Sci. 36, 391.
Clegg, L. F. L. (1955). J. appl. Bad. 18, 358.
Clegg, L. F. L. (1962). Monograph Ser. W.H.O. no. 48, p. 183
Cousins, C. M. (1967). J. Soc. Dairy Technol. 20, 198.
Garvie, E. I. & Clarke, P. M. (1955). J. appl. Bact. 18, 90.
Goetchius, G. R. & Botwright, W. A. (1950). J. Milk Fd Technol. 13, 63.
Guiteras, A. F. & Shapiro, R. L. (1946). J. Bact. 52, 635.
Hoy, W. A. & Clegg, L. F. L. (1953). Proc. Soc. appl. Bact. 16, i.
Weber, G. R. & Black, L. A. (1948). Am. J. publ. Hlth 38, 90.

Studies on the laboratory soiling of milking equipment

  • Branca Bačić (a1), Christina M. Cousins (a1) and L. F. L. Clegg (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.