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Chapter 20

Chapter 20 Microbiology (Naomi Schutte-Smith)

Bacilli Bacteria that have a rod shape.
Cocci Bacteria that have a round shape.
Colony A mass of bacteria growing on a solid culture medium that have arisen from the multiplication of a single bacterium.
Contagious Capable of being transmitted directly or indirectly from one person to another.
Culture The propagation of a mass of microorganisms are grown in the culture medium.
Culture Medium A mixture of nutrients on which microorganisms are grown in the laboratory.
False-negative A test result denoting that a condition is absent when it is actually present.
False-positive A test result denoting that a condition is present when it is actually absent.
Fastidious Extremely delicate, difficult to culture, and involving specialized growth requirements.
Immunization The process of becoming protected from a disease through vaccination.
Incubate In microbiology, the act of placing a culture in a chamber that provides optimal growth requirements for the multiplication of the organisms, such as the proper temperature, humidity, and darkness.
Incubation period The interval of time between the invasion by a pathogenic microorganism and the appearance of first symptom of disease.
Infectious disease A disease caused by a pathogen that produces harmful effects on it's host.
Inoculate To introduce microorganisms into a culture medium for growth and multiplication.
Microbiology The study of microorganisms and their activities.
Mucous Membrane A membrane lining body passages or cavities that open to the outside.
Normal flora Harmless, nonpathogenic microorganisms that normally reside in many parts of the body but do not cause disease.
Resistance The natural ability of an organism to remain unaffected by harmful substances in its environment.
Sequela A morbid condition occurring as a result of a result of a less serious primary infection.
Smear Material spread on a slide for microscopic examination.
Specimen A small sample or part taken from the body to show the nature of the whole.
Spirally Bacteria that have a spiral or curved shape.
Streaking The process of inculating a culture to provide for the growth of colonies on the surface of a solid medium. Streaking is accomplished by skimming a wire inoculating loop that contains the specimen across the surface of the medium using a back/forth motion
Sterptolysin An exotoxin produced by beta-hemolytic streptococci, which completely hemolyzes red blood cells.
Susceptible Easily affected, lacking resistance.