THE INFLUENCE OF CERTAIN MANUFACTURING PROCESSES ON THE STAPHYLOCOCCUS AUREUS CONTENT OF SPRAY‐DRIED MILK
Open Access
- 1 April 1957
- journal article
- Published by Wiley in Journal of Applied Bacteriology
- Vol. 20 (1) , 65-70
- https://doi.org/10.1111/j.1365-2672.1957.tb04518.x
Abstract
SUMMARY: Dried milk was prepared from milks inoculated with pure cultures of Staph. aureus, using a small pilot‐type batch vacuum evaporator and spray drier. Vacuum evaporation reduced the numbers of Staph. aureus in most experiments but one strain was capable of multiplication at evaporating temperatures up to about 43°. Above 49° the organisms declined rapidly and at 56° they were eliminated. Residual staphylococci present in the warm concentrated milk feeding the drier increased in some experiments but declined markedly in others. Staphylococci added directly to warm concentrated milk always proliferated. A small proportion of staphylococci survived spray drying, even with high hot air temperatures. Different strains varied in their susceptibility to different stages of the whole process.This publication has 4 references indexed in Scilit:
- PUBLIC HEALTH PROBLEMS ASSOCIATED WITH THE MANUFACTURE OF DRIED MILK. II. PREVENTION OF CONTAMINATION DURING MANUFACTUREJournal of Applied Bacteriology, 1955
- PUBLIC HEALTH PROBLEMS ASSOCIATED WITH THE MANUFACTURE OF DRIED MILK. I. STAPHYLOCOCCAL FOOD POISONINGJournal of Applied Bacteriology, 1955
- 327. Spray-dried milk powder. Commercial observations over two years of the effect of high temperature pre-heatingJournal of Dairy Research, 1945
- 293. Bacteriological aspects of the manufacture of spray-dried milk and whey powders, including some observations concerning moisture content and solubilityJournal of Dairy Research, 1942