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Water Lecture 3 A. Disinfection B. Water Safety Plans - page 11 / 47

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Surface properties conferring susceptibility or resistance:

Resistance: Spore; acid fast (cell wall lipids); capsule; pili

Susceptibility:  sulfhydryl (-SH) groups; phospholipids; enzymes; porins and other transport structures, etc.

Physiological state and resistance:

Antecedent growth conditions: low-nutrient growth increases resistance to inactivation

Injury; resuscitation and injury repair;

disinfectant exposure may selection for resistant strains

Physical protection:

Aggregation; particle-association; biofilms; occlusion (embedded within protective material), association with or inside eucaryotes; corrosion/tuberculation

Some Factors Influencing Disinfection  Efficacy and  Microbial Inactivation - Bacteria

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