Unit 4 quizzes Flashcards
A relationship where one partner benefits and the other is unharmed is…
commensalism
The cells most often involved in phagocytosis of the M. tuberculosis bacilli are…
alveolar macrophages
A person with active TB is…
contagious and symptomatic
The number of new cases of a disease at a given time in a population is best described as…
incidence
Epidemiology is defined as the study of
where and when a disease occurs, and how it is transmitted.
HIV most often binds to and replicates in which of the following cells?
T helper cells (CD4)
An analytical epidemiology study which surveys a population at one point in time is a …
cross-sectional study
Examples of vectors are all of the following except
* soil
* people
* birds
* insects
HIV possesses the enzyme ____________________________ which converts RNA to DNA.
reverse transcriptase
Tuberculosis is commonly transmitted by which of the following methods?
Airborne
