Physical Methods of Sterilization
Physical Methods:
1. Sunlight: It possesses appreciable bacteriocidal activity. The action is due to ultraviolet rays. This is one of the natural methods of sterilization in case of water in tanks, river and lakes.
2. Drying: Drying in air has deleterious effect on many bacteria. Spores are unaffected by drying. Hence it is very unreliable method.
3. Heat: The factors influencing sterilization by heat are:
(i) Nature of heat
(a) dry (b) moist
(ii) Temperature and time.
(iii) Number of organism present.
(iv) Whether organism has sporing capacity.
(v) Type of material from which organism is to.be eradicated.
Tags: carcinomatosis, coronary occlusion, glomerulonephritis, malaria, nephrosis, Rheumatic Fever, serum sickness
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