ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Influences of soy protein (promine D; SP), fish protein concentrate (FPC) and Brewer's Yeast or Torula Yeast on aerobic growth of S. aureus (288) and production of enterotoxins A and D were evaluated in liquid media containing equivalent amounts (1.8%) of protein from each source. S. aureus grew faster (29 min generation time) and reached a final population of 2–7 × 109/ml in yeast media as compared to soy or, fish protein concentrate; 50–56 mm generation time and a final population of 2 × 108/ml in SP or EPC. Production of enterotqxins by S. aureus was enhanced in yeast media. Enterotoxin A was detectable in unconcentrated yeast preparations after 6 hr and both toxins (A and D) after 12 hr incubation. Enterotoxin A was detected only in FPC concentrated 50-fold and after 24 hr incubation. Neither enterotoxin A nor D was detected in SP concentrated 100-fold after 24 or 48-hr incubation. Addition of Brewer's Yeast (2% w/v) to whole milk enhanced production of enterotoxins A and D; there was at least a 100-fold higher amount of enterotoxin in milk + yeast as compared to simply milk.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1976.tb01118.x
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