Microbiology worksheet with answers

Which of these is caused by a virus?

1. ATuberculosis
2. BInfluenza
3. CMalaria
4. DTetanus

Which microorganism most often causes oral or vaginal thrush?

1. ACandida albicans
2. BStaphylococcus aureus
3. CTrichomonas vaginalis
4. DHerpes simplex virus

What is the most effective single measure to prevent the spread of infection in hospitals?

1. AHand hygiene
2. BWearing a face mask at all times
3. CGiving every patient antibiotics
4. DKeeping windows closed

Which infection is a typical complication of broad-spectrum antibiotic use, causing severe diarrhoea?

1. AHepatitis A
2. BHelicobacter pylori infection
3. CClostridioides difficile infection
4. DSalmonella infection

Which type of immunity is given by breast milk antibodies?

1. AArtificial active immunity
2. BNatural passive immunity
3. CNatural active immunity
4. DArtificial passive immunity

MRSA is resistant to methicillin because it has:

1. AAn altered penicillin-binding protein (PBP2a)
2. BAn efflux pump for every antibiotic
3. CA polysaccharide capsule that blocks the entry of all beta-lactams
4. DNo cell wall at all

What is the key difference between bactericidal and bacteriostatic antibiotics?

1. ABactericidal drugs work only outside the body
2. BBactericidal drugs kill bacteria; bacteriostatic drugs stop growth and rely on the immune system to clear them
3. CBacteriostatic drugs always work faster than bactericidal drugs
4. DBactericidal drugs work only on viruses; bacteriostatic drugs work on bacteria

On MacConkey agar, pink colonies grow from a urine sample. What does this tell you?

1. AThe organism is a Gram-positive coccus
2. BThe organism is probably a Gram-negative rod that ferments lactose
3. CThe organism is a fungus
4. DThe organism does not ferment lactose, so it is probably Salmonella