Microbiology of food preservation - Texas A&M University
Microbiology of food preservation - Texas A&M University
Microbiology of food preservation - Texas A&M University
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PasteurizationMilk pasteurization• Originally designed to targetMycobacterium tuberculosis• Coxiella burnetti is currently thetarget organismPasteurization• Thermoduric organisms–Organisms capable <strong>of</strong> survivingpasteurization–Examples: lactobacilli,micrococci, streptococci,lactococci–Pathogens are not thermoduricFactors affecting heat resistance <strong>of</strong>microorganisms•Water•Fat•Salts– Salts that reduce a w (Na + , K + )more protective than those thatincrease a w Ca +2 , Mg +2 )• Carbohydrates•pH
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