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Test 1 epidemiology

Terms in this set (27)

An example of a communicable disease
- influenza virus
- food poisoning
-cancer
Influenza virus
20 people in a population of 50 acquired a disease of the 20 infected 5 people died.
Calculate the:
lethality
Morbidity
Mortality
Lethality: 25% (5/20)
Morbidity: 40% (20/50)
Mortality: 10% (5/50)
George is aseptically transferring bacteria from broth to a slide he flames the loop till red hot, waited 30 seconds, takes the capo off with his pinky, flames the tube, retreated the sample, then inoculates the slide, what did he doe wrong?
He forgot to vortex the tube
He did not reframe and recap and set culture aside before inoculating the slide
A hospital acquired infection which required a compromised host is called a ________ infection
Nosocomial
When aseptically preparing a smear on a slide what is the difference in transferring your culture from broth and a slant
You must vortex your broth before transfer

You must aseptically add a drop of water on the slide before transfer from a slant
You look at a colony the margin or edge of the colony is completely smooth looking, what is type of margin called
Entire
Bacteria that require the absence of O2 to grow are called?
Obligate anaerobes
The resivoir of the pathogen where the pathogen multiples and reproduces is called the ___________ source of infection
Primary
You shake hands with an infected person and contract their disease this is an example what type of transmission?
Direct horizontal
In thiogycollate broth resazurin acts as an indicator when O2 is present what is seen
The media turns blue
Bacterial cells that are circular and arranged in limits chains are called?
Streptococcus
A misquote voted a malaria infected person and then votes a non infected person transferring the disease to the second person, this is an example of
Biological transmission
_____________ is the number of new cases of a diseases in an out break at a specific date
Incidence
A _____________ disease is one that is frequent and consistently present in a certain population
Endemic
Rabies is an example of a __________ disease, which can be transmitted from animal to humans
Zoonotic
When looking at growth of an organism in thioglycollate broth, you only see growth at the bottom of the tube you would characterize this growth as_______ and the organism as a________
Sediment
Obligate anaerobes
When working with a microscope you are looking a bacterial under the 40x objective lense, what is the totals magnification of the image?
400x

40x10
A _________ organism is able to tolerate O2, but does not use oxygen in its metabolic process
Aerotolerant
________________a type of margin that looks filamentous but has branches of filaments coming off
Rhizoid
A_________________diseases is one that shows an inc amount of cases in short period of time
Epidemic
____________is an inanimate object that can harbor a pathogen and cause transmission of a disease
Fomite
A person who carries or harbors a pathogen that causes a disease but does not show symptoms of the diseases called___________
Carrier
Comma-shaped bacteria cell called______________
Vibro
A___________organism does not regulate o2 but will use it for metabolic processes if it grows in the prescence of o2
Facultative anaerobic
In thioglycolate broth ________________reduces o2 to water
Na THIO
________________is the time between infection and the appearance of the first symptoms of a disease
Incubation time
Label microscope
Eye piece, stage , light source, coarse/fine adjustment
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