Microorganisms

Question 1

what are the 4 main types of microorganism that cause disease?

Answer 1

bacteria
viruses
fungi
protozoa

Question 1

what are bacteria?

Answer 1

visible under light microscope
single-celled
survive as spores
spores can only be killed by sterilisation

Question 2

what are viruses?

Answer 2

only visible through an electron microscope
have to live in host cells
exist as a protein capsule containing chemicals needed to infiltrate host cell
protein capsule causes immune response from body
unaffected by antibiotics
vaccines

Question 3

what are fungi?

Answer 3

larger than bacteria but still only visible with a microscope
microscopic plant which reproduces by budding or spores
grow by making an extensive branch network across tissues (hyphae)

Question 4

which fungus causes oral thrush?

Answer 4

candida albicans

Question 5

how can oral thrush be treated?

Answer 5

anti-fungal agents

Question 6

what are dental caries?

Answer 6

bacterial infection of hard tissues in tooth, especially strep

Question 7

what is periodontitis?

Answer 7

bacterial infection of the periodontium

Question 8

what is a cold sore?

Answer 8

viral infection of heroes simplex type I