Microbiology worksheet with answers

Which microorganism most often causes oral or vaginal thrush?

1. AHerpes simplex virus
2. BStaphylococcus aureus
3. CCandida albicans
4. DTrichomonas vaginalis

What is the main function of bacterial flagella?

1. AProtection against drying out
2. BStorage of nutrients
3. CAttachment to host cells
4. DMovement

What shape are cocci?

1. ARound
2. BSpiral
3. CComma-shaped
4. DRod-shaped

Which white blood cells are the main phagocytes in an acute bacterial infection and the main component of pus?

1. AB lymphocytes
2. BBasophils
3. CNeutrophils
4. DEosinophils

In the chain of infection, what is the "reservoir"?

1. AThe place where the pathogen normally lives and multiplies
2. BThe route by which the pathogen leaves the infected host's body
3. CThe person who is most at risk of infection
4. DThe way the pathogen enters a new host

What is the incubation period?

1. AThe time between infection and the first symptoms
2. BThe time a culture needs in the laboratory
3. CThe time an antibiotic takes to work
4. DThe time during which a patient remains infectious to others

The minimum inhibitory concentration (MIC) of an antibiotic is:

1. AThe lowest concentration that kills 99.9% of the bacterial inoculum in vitro
2. BThe highest dose a patient can tolerate
3. CThe plasma level at which side effects begin
4. DThe lowest concentration that prevents visible bacterial growth in vitro

What does an R0 (basic reproduction number) of 3 mean?

1. AOn average one case infects three others in a fully susceptible population
2. BThe infection lasts three days
3. CThree doses of vaccine are needed
4. DThree percent of infected people die