Page 11 - Microbiology in workplace

GMP Training – Microbiology in the Workplace by www.gmpsop.com

Physical environment

The right physical environment means having the right
combination of:

Environment (e.g. the level of oxygen)

Temperature

pH

Physical environment

Micro-organisms require varying amounts of gases, specifically, oxygen (O2),
carbon dioxide (CO2), and nitrogen (N2). As you learned in the previous topic,
micro-organisms needing O2 are called aerobes; those that can't tolerate it are
anaerobes; those that can grow with or without O2 are the facultative anaerobes.

CLASSIFYING MICRO-ORGANISMS BY OPTIMUM TEMPERATURE

Psychrophiles Low (7°C - 15°C)

Mesophiles Moderate (25°C -40°C)

Thermophiles High (>45°C)

GROWTH OF MICRO-ORGANISMS

Temperature:
Temperature affects the growth
rate of micro-organisms.
Generally, lower temperatures

inhibit growth, while warmer
temperatures promote growth.
Although optimum temperatures
will vary from species to species,
the pattern of growth will be the
same.

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