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Dental Bacteriology Exam 1
Epidemiology
17
Biology
Graduate
08/25/2009

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Term
epidemiology
Definition
study of determinants, occurance, distribution, and control of health and disease in a defined population--try to define parameters of a disease to establish effective control and prevention
Term
etiologic agent
Definition
microorganism that causes a disease in an epidemiologic study
Term
index case:
Definition
person with an infection that serves as a source of infection for others
Term
dissemination
Definition
movement of an infectious agent from a source individual directly into the environment
Term
infectiousness
Definition
transmission of an organism to a susceptible individual
Term
reservoir
Definition
place where infectious agents are perpetuated in nature-- i.e. water systems
Term
Sporadic occurance of a disease in a population:
Definition
cases that occur in a population without any periodicity
Term
endemic occurance of disease in a population:
Definition
the usual number of cases of a particular disease in a population
Term
epidemic:
Definition
short term increase in the occurrence of a disease in a population
Term
pandemic
Definition
a long term increase in the incidence of a disease in a very large population
Term
Methods of transmission:
Definition

1. person-to-person contact

2. indirect contact with fomites--inanimate objects that transmit pathogens but do not support multiplication

3. blood borne

4. contact with infected animals

5. insect vectors

6. common vehicle transmission- agent passed by common inanimate objects

7. airborne

Term
In dentistry, the most important source of pathogens is from_______.
Definition
HUMANS
Term
Bacteria of concern in dentistry:
Definition

1. Neisseria gonorrheae

2. Treponema pallidum

3. Mycobacterium tuberculosis

4. Streptococcus pyogenes

Term
How can Neisseria gonorroheae be transmitted in dentistry?
Definition
can be found in oral cavity--innoculation
Term
How can Treponema pallidum be transmitted in dentistry?
Definition

**causes syphillus

*found in oral cavity, but is more delicate than gonorroheae

*transmitted through innoculation

Term
How can Mycobacterium tuberculosis be transmitted in dentistry?
Definition
innoculation or inhalation
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