Microbiology worksheet with answers

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

1. AHand hygiene
2. BKeeping windows closed
3. CWearing a face mask at all times
4. DGiving every patient antibiotics

Lyme disease is transmitted to humans by:

1. ACoughing and sneezing
2. BContaminated water
3. CTick bites
4. DMosquito bites

Which microorganism most often causes oral or vaginal thrush?

1. ATrichomonas vaginalis
2. BCandida albicans
3. CStaphylococcus aureus
4. DHerpes simplex virus

How does an mRNA vaccine produce immunity?

1. AThe mRNA kills the virus directly in the blood
2. BThe mRNA contains weakened live virus
3. CThe mRNA is inserted permanently into human DNA
4. DBody cells use the mRNA to make a viral protein that the immune system learns to recognise

Which bacterium is the most common cause of stomach ulcers?

1. AClostridioides difficile
2. BStaphylococcus aureus
3. CHelicobacter pylori
4. DEscherichia coli

Which antibody class is the first to rise in a new infection?

1. AIgM
2. BIgA
3. CIgE
4. DIgG

A traveller returns from sub-Saharan Africa with fever. Malaria is suspected. Which species is most likely to cause severe and cerebral malaria?

1. APlasmodium malariae
2. BPlasmodium ovale
3. CPlasmodium vivax
4. DPlasmodium falciparum

Why can an HIV antibody test be negative in the first weeks after infection?

1. AThe virus hides only in red blood cells during the first weeks
2. BHIV does not trigger antibody production at all
3. CThe body has not yet produced enough antibodies to detect
4. DThe antibodies are destroyed by the test reagents