HEAT-RESISTANCE OF BACILLUS-STEAROTHERMOPHILUS SPORES IN ALGINATE-MUSHROOM PUREE MIXTURE

Thermal resistance of Bacillus stearothermophilus spores has been esta blished inoculating spores in alginate-mushroom puree mixture (ungelle d) and in alginate-mushroom puree mixture set in calcium chloride (gel led). Data are compared with those obtained suspending the spores in d istilled water, mushroom extract and in calcium chloride. Results indi cated that, in general, D values obtained in gelled mixture were highe r than D values obtained in distilled water, mushroom extract or in un gelled mixture, while the D value in the ungelled mixture was similar to that obtained in distilled water. D-121 value in gelled mixture was close to that obtained in 2% (w/v) calcium chloride.