BBH 440 Final Exam With Questions And Correct
Answers A+ Graded
what is an epidemic? - ANSWER an health event that occurs in excess to normal
expectancy
what is the traditional definition of epidemiology? - ANSWER concerned with patterns of
disease and its occurence
what is the definition of epidemiology-modern? - ANSWER distribution in disease and the
study of the related bio psychosocial facors
What does study mean in the epidemiology definition? - ANSWER the methods we rely
on to observe and compare groups
What is descriptive epidemiology? - ANSWER involves the characterization of the
distribution of health related events
What does descriptive epidemiology answer? - ANSWER who, what, when and where
What is analytic epidemiology? - ANSWER identifying and quantifying associations,
testing hypotheses, and identifying causes
What does analytic epidemiology answer? - ANSWER why and how
What is infectious disease epidemiology? - ANSWER infectious disease epidemics
What is chronic disease epidemiology? - ANSWER study of causal factors of chronic
,diseases
What is endemic mean? - ANSWER the usual presence of a disease in a population
Do epidemics need to have large numbers to be considered an epidemic? - ANSWER no
What is a common source epidemic? - ANSWER arise from on particular source that
occur rapidly
What makes an epi graph of a common source easily distinguishable? - ANSWER sharp
rise in no. of cases initially then sharp decline
What is a point common source? - ANSWER source contamination is fixed in place or
time
What is an intermittent common source? - ANSWER source varies with either place or
time
What is a continuous point source? - ANSWER source contamination is constant
An example of a point common source would be : ANSWER food illness or contaminaiton
An example of an intermittent common source would be: ANSWER pond is dumped with
chemicals every two weeks
An example of a continuous common source would be: ANSWER pond constantly
dumped in
An example of what a propagated epidemic is: ANSWER arise from infections being
transmitted from one infected person to another
,How are propagated epidemics transmitted? (2) - ANS indirect and direct
Give an example of propagated epidemics. (3) - ANS tuberculosis, whooping couch, flu
What is mixed epidemics considered as? - ANS when a common source epidemic is
followed by person to person contact and the disease spreads via propagation
What is antigenic drift? - ANS a gradual change caused by a series of mutations over
time
What is antigenic shift? - ANSWER a sudden change in the surface antigen proteins
forming a new virus subtype
Are antibodies present during antigenic shift? - ANSWER no, new strain
What is pandemic? - ANSWER an outbreak of a disease of unusual proportions
spreading rapidly from one region to another
What are the hallmarks of a pandemic? (2) - ANSWER widespread excess illness and
mortality
Which diseases are emerging? - ANSWER chronic
Which diseases are declining? - ANSWER infectious
What animals are typical flu mixing vessels? - ANSWER pigs and birds
What is epizootic? - ANSWER epidemic of disease in an animal population
, What is a reservoir? - ANSWER habitat in which the agent lives, grows, and multiplies
What is a portal of exit? - ANSWER where the agent leaves the reservoir
What is a portal of entry? - ANSWER where the pathogen enters the host
What is the host? - ANSWER final link in chain of infection
What are the two ways diseases transmit? - ANSWER direct and indirect
What are the two types of direct transmission? - ANSWER direct contact and droplet
spread
What is direct contact? - ANSWER host to host contact directly
What is droplet spread contact? - ANSWER aerosols produced spread it
What are the three ways in which indirect transmission occurs? - ANSWER vehicles,
vectors, airborne
What are vehicles? - ANSWER intermediary spread
What are some examples of vehicles? - ANSWER food, water, blood
What is a fomite born vehicle? - ANSWER vehicle that is an inanimate object
What is a vector? - ANSWER invertebrate animal that transmits disease
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