Exercise 9

Chemical methods for microbial growth control

Involves the use of antibiotics or inorganic or organic chemicals known as antiseptics or disinfectants

Phenol

Acts as a protoplasmic poison, and penetrates and disrupts the cell membrane and cell wall resulting in the leakage of cellular components.

Alcohols

These are bactericidal and fungicidal. They denaure proteins and dissolve lipid complexes in the cell membrane

Microbicidal, Microbiostatic

depending on the concentration of the chemical and the length of exposure, a chemical may be __ or __

Specific, broad-spectrum

Chemotherapeutic agents may have __ or __ activity

specific

This type of activity is when a chemotherapeutic agent is only effective to one group of microorganism

broad spectrum

This type of activity is when a a chemotherapeutic agent is effective to a wide variety of microorganisms

drug susceptibility, agar well, kirby bauer method

To determine a microorganism’s ____ diffusion assays such as the ___, and the ___ are employed