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Survival of Heated Streptococcus faecalis as Affected by Phase of Growth and Incubation Temperature after Thermal Exposure
Author(s) -
Beuchat L. R.,
Lechowich R. V.
Publication year - 1968
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1968.tb00389.x
Subject(s) - incubation , logarithmic growth , bacterial growth , microbiology and biotechnology , incubation period , phase (matter) , streptococcus , chemistry , biology , bacteria , materials science , biochemistry , mathematics , mathematical analysis , organic chemistry , genetics
SUMMARY Effects of the growth phase of 3 Streptococcus faecalis strains on heat resistance at 60° was studied. During the initial and middle logarithmic growth phases no resistance to 60° was found. Organisms heated in a stationary phase of growth were incubated at temperatures ranging from 45 to 7.3° to determine the effect of incubation temperature on their survival. Maximum survival of heated organisms was observed at optimum growth temperatures of c. 30°. The incubation time required for maximum recovery was longer for heated than for unheated organisms, regardless of the incubation temperature.