Microbial Growth and its Control

Question 1

Environment factors that influence the growth of bacteria

Answer 1

TEMPERATURE
PH
WATER AND OSMOTIC PRESSURE
ABSENCE OR PRESENCE OF OXYGEN
NUTRIENTS

Question 2

Physical methods for control of microbial growth

Answer 2

HEAT
LOW TEMPRETURE
DRYING
ULTRAVIOLET RADIATION

Question 3

Chemical agents

Answer 3

Iodine-

• skin preparation for surgery
• wound disinfection

Chlorine-

• purification of water
• swimming pool treatment.

Chlorhexidine-

• surgical scrub
• handwashing

Alcohol-

• Skin decontamination before injection
• wipes for hand and equipment.