Micro Chapters 19 & 4
Study quizzes for final
Terms in this set (20)
2 environmental reservoirs for pathogens.
Epidemiologists investigate disease outbreak to determine.....
1. Causative agent
3. Rout of transmission
People who have asymptomatic infections or are colonized with a pathogen are __________ of the infectious agent (i.e. Typhoid Mary).
Pathogens may be shed in.....
2. Respiratory droplets
Indirect contact transmission involves transfer of pathogens via ________.
Droplet transmission of respiratory pathogens is considered _______ because of the close proximity involved.
The MMWR, put out by the CDC stands for......
Morbidity and Mortality Weekly Report
This type of study is generally used to evaluate the effectiveness of treatment or intervention in preventing disease.
Most prokaryotes multiply by....
The time required for a prokaryotic population to double in number is called
Growth factor time
Prokaryotes often live in a polysaccharide-encased community known as a _______.
Which method is used to isolate bacteria in order to obtain a pure culture?
Streak plate method
When grown in a closed system, a population of bacterial cells goes through the following 5 phases: lag, _______, stationary, death, and prolonged decline.
What instrument is used to measure the turbidity of a culture?
This type of medium inhibits organisms other than the one being sought.
This type of medium contains a substance that certain bacteria change in a recognizable way.
This type of medium provides conditions in a broth that enhance the growth of one particular organism in a mixed population.
Prokaryotes often grown in close associations containing multiple different _________
Organisms can be grouped as neutrophils, acidophiles, or alkalophiles, based on their optimum ___.
Bacteria that cannot synthesis cell constituents such as amino acids and vitamins require these as.....
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