According to the above profile, what is the D102 value? If the Z value of this o

Question

According to the above profile, what is the D102 value? If the Z value of this organism is 2degreeC, what are the D100 and D106 values? According to the above profile, how much time would be required to sterilize a broth culture containing 106 cells in the lab at 104degreeC? Raw milk contains a bacterial population of 2 Times 106 cells/mL. If the D72 value of these bacteria is 7.5 seconds, how many bacteria would remain after a HTST pasteurization? How much time would be required at 65degreeC to obtain the same inactivation factor obtained in the previous question if the Z value of this bacteria at 7 degree C?

Explanation / Answer

8. According to above given profile the D102 value is 11 seconds.

9. If the Z - value is 2 degrees, The D100 value is 15 seconds and D106 value is 13 seconds.

10. From the above profile, about 15 seconds are required for 106 cells in sterilized broth culture at 104 degrees.

11. The cells remined after HTST pasteurization of raw milk would be 1.44 x 106 cells (2 x 106 x 72/100).

12. The time required is 15 seconds at 65 degrees to obtain same inactivation factor obtained at 7 degrees.

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