Microbiology worksheet with answers

What is a yeast?

1. AA single-celled fungus
2. BA small virus
3. CA type of spiral bacterium
4. DA multicellular parasite

What is a bacteriophage?

1. AA bacterium that infects viruses
2. BAn antibiotic made by fungi
3. CA white blood cell that eats bacteria
4. DA virus that infects bacteria

In infection control, what is a vector?

1. AAn object such as a door handle that carries germs between patients on a ward
2. BThe first person infected in an outbreak
3. CA living organism that carries a pathogen from one host to another
4. DA drug used to prevent infection

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

1. ANeutrophils
2. BEosinophils
3. CBasophils
4. DB lymphocytes

Which statement is one of Koch's postulates?

1. AThe organism must be visible with the naked eye
2. BThe disease must respond to antibiotics
3. CThe organism must cause the same disease when introduced into a healthy susceptible host
4. DThe organism must be found in healthy people as well

Which vaccine contains live attenuated (weakened) viruses?

1. ATetanus vaccine
2. BInactivated influenza injection
3. CMMR (measles, mumps, rubella)
4. DHepatitis B vaccine

A patient with suspected infectious pulmonary tuberculosis is admitted. Which precautions are needed?

1. ANo special precautions, because TB spreads only by blood
2. BContact precautions only, with gloves and an apron
3. CAirborne precautions, ideally a negative-pressure room and respirator masks for staff
4. DDroplet precautions with a surgical mask, and only within one metre

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 lowest concentration that prevents visible bacterial growth in vitro
3. CThe plasma level at which side effects begin
4. DThe highest dose a patient can tolerate