Lecture 1 (intro to mmi)

Question 1

Size of organims from smallest to largest

Answer 1

• prion
• virus
• bacteria
• fungi
• parasites
• mammals

Question 2

Gram negative vs gram positive

Answer 2

• Gram negative bacteria has an outer membrane which prevents stain from entering. (Red/ pink)
• Gram positive bacteria has no outer membrane and multiple layers of peptidoglycan which absorbs stain. (Purple)

Question 3

How are bacteria named in this course?

Answer 3

Genus, species.

Question 4

5 categories of microbiology

Answer 4

• Bacteriology (bacteria)
• Virology (viruses)
• Mycology (fungi and yeast)
• Parasitology (protozoa, worms, ectoparasites)
• Immunology (immunity)

Question 5

Prokaryote vs Eukaryote

Answer 5

• Prokaryote is a bacteria. Small, unicellular. No nuclear membranes. Binary fission
• Eukaryotes are fungi, plant cells, human cells. Genetic material in a nucleus with a nuclear membrane.

Question 6

Acid-fast stain

Answer 6

Used for bacteria with waxes in their cell walls. Used for mycobacteria (TB)

Question 7

Coccus bacteria

Answer 7

• Round
• staphylococci remain in clusters
• streptococci remain in chains

Question 8

Bacillus bacteria

Answer 8

• Rod shaped
• Coccobacilli are singular, short, oval cells.

Question 9

Spiral bacteria

Answer 9

• Curved
• Vibrio are short curved rods.
• Spirilla are wavy, loose curves
• Spirochaete are tightly coiled but flexible