Chapter 7 MICRO
A suffix meaning "to kill".
Destroying or removing all forms of microbial life
The absence of pathogen on an object or area.
The reduction of microbial populations to safe public health levels
The chemical disinfection of living tissue, such as skin or a mucous membrane.
The removal of transient microbes from skin by mechanical cleansing or by an antiseptic.
Heat sufficient only to kill endospores of the botulism bacterium.
ii The lowest temperature required to kill a liquid culture of a certain species of bacteria in 10 minutes.
Thermal death point
The time in minutes required to kill 90% of a bacterial population.
Decimal reduction time
Mild heating to destroy particular spoilage organisms or disease organisms in milk or similar products.
A test for the effectiveness of a chemical disinfectant.
The absence of water, resulting in a condition of dryness.
iii Ethylene oxide
Quaternary ammonium compound
iv An effective liquid sporicide
A bacteriocion classified as an antibiotic
A bisphenol found in many household products
An antibiotic antifungal
v Added to chlorine to form chloramines
An antibacterial effect of ultraviolet radiation in DNA.
Formaldehyde in an aqueous solution
An example would be iodine in an aqueous-alcohol solution
For example, povidone-iodine solution
vi Chlorine in tablet form issued as a water purifier by the U.S military.
Name of a test that determines if milk has been properly pasteurized.
Used as an antiseptic in certain mouthwashes
Used in many water treatment plants as a disinfectant; produced by electrical discharges at the site
1. Antifungal organica compound used in food.
2. Ingredient in antidandruff shampoo.
1. Sodium benzoate
2. Zinc pyrithione
Ultraviolet light is an example of _______ radiation.
Sunlight owes its biocidal activity mainly to the formation of ________ oxygen.
A good example of ionizing radiation is
X-rays, gamma rays, high-energy electrons
Ethanol is usually used in a concentration of about ________.
A less irritating form of formaldehyde is ___________.
A compound that would only inhibit the growth of a fungus would be a fungi __________ (supply the suffix).
Steam ________ allows temperature above boiling to be reached.
under pressure (as in autoclave)
Steam under pressure is obtained in retorts, pressure cookers, and __________.
Supercritical ________ is used for decontaminating foods and medical implants.
Generally speaking, the group of organisms that is more resistant to osmotic pressure than bacteria is ____________.
fungi, such as molds and yeasts