Acetic, Lactic, and Hydrochloric Acid Effects on Staphylococcus aureus 196E Growth Based on a Predictive Model

摘要

Mathematical models were developed with a modified Gompertz func- tion to predict Staphylococcus aureus 196E growth, where pH was al- tered with either acetic, lactic or hydrochloric acid. S. aureus 196E was inoculated into broth formulated with 0.5, 4.5 or 8.5/100 sodium chloride, adjusted to pH 5.0, 6.0 or 7.0, and incubated aerobically at 12, 20 or 28℃. Each model adequately predicted log growth, and some interactive relationships between independent variables upon population growth were significant (p<0.05). Predictions of growth showed that acetic was generally more inhibitory than lactic or hydrochloric acids.