physc/chm methods (1) Flashcards
(15 cards)
Destruction or removal of all forms of microbial
life including endospores but with the possible
exception of prions.
Sterilization
Sufficient heat treatment to kill endospores of
Clostridium botulinum in canned food.
Commercial
Sterilization
Destruction of vegetative pathogens.
Disinfection
Destruction of vegetative pathogens on living
tissue
Antisepsis
Removal of microbes from a limited area, such
as the skin around an injection site.
Degerming/
Degermnation
Treatment intended to lower microbial counts on
eating and drinking utensils to safe public health
levels.
Sanitization
kills microorganisms, usually with certain exceptions, such as endospores
Biocide or germicide
inhibit the growth and multiplication of bacteria.
Bacteriostatic
from the Greek for decay or putrid, indicates bacterial contamination, as in septic tanks for sewage
treatment.
Sepsis
means that an object or area is free of pathogens
Aseptic
the minimum time required to kill a suspension of an
organism at a predetermined temperature and
environment
Thermal Death Time
Factors affecting the process of sterilization through heating
- Nature of the heat
- Temperature and time
- Number of microorganisms
- Nature of microorganisms
- Type of material
- Presence of organic material
Give two types of heat
- Moist Heat
- Dry Heat
This is prefered because of its more rapid killing action. sits main mechanism of action is coagulation and denaturation of proteins
Moist Heat
The effectiveness of this heat depends on the penetration of heat through the material to be sterilized.
Dry heat
