2.2.1 Sterilization and Disinfection

2.2.1 Sterilization and Disinfection

Sterilization means destruction of all microorganisms including spores. Disinfection means the destruction of vegetative organisms which might cause disease or putrefaction.

Sterilization Methods

1. Red heat (Flaming)

2. Dry heat (Hot air)

3. Moist heat

a. Steam under pressure (autoclaving)

b. Steam not under pressure (Tyndallization)

4. Filtration.

The above methods are commonly practiced in microbiological laboratories. Besides, there are methods like (a) irradiation (b) Aquoustics (Ultrasonic sound waves) which can also bring about sterilization.

Last modified: Monday, 19 December 2011, 8:49 AM