S2) Introduction to Microbes Flashcards Preview

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Flashcards in S2) Introduction to Microbes Deck (19)
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1

Identify the 4 constituents of the 'microbial world'

- Viruses

- Bacteria

- Parasites

- Fungi

2

Identify 8 micro-organisms and list them in order of increasing size

→ Prions

→ Proteins

→ Viruses

→ Mycoplasma / Chlamydiae / Rickettsiae

→ Mitochondria

→ Bacteria

→ Eukaryotic cells (yeasts, protozoa, etc)

→ Worms

3

List 4 components of a virus

- Envelope

- Protein coat

- Spikes 

- Nucleic acid (DNA / RNA)

4

What are the different bacterial shapes?

5

What colour do Gram positive bacteria stain?

Stain purple

6

What are the components of Gram positive gram stains?

- Plasma membrane

- Periplasmic space

- Peptidoglycan

7

What colour do Gram negative bacteria stain?

Stain red

8

What are the components of Gram negative gram stains?

- Plasma membrane

- Periplasmic space

- Peptidoglycan

- Outer membrane (lipopolysaccharide and protein)

9

Identify and describe different bacteria in terms of their oxygen tolerance

Aerobes – require oxygen in environment for survival

- Anaerobes – require oxygen-free environment for survival

10

Identify 3 medically important Gram Positive cocci bacteria

- Staph aureus

- Streptococcus pneumoniae

- Strep pyogenes

11

Identify 2 medically important Gram Positive bacilli bacteria 

- Listeria monocytogenes

- Clostridium difficile

12

Identify 2 medically important Gram Negative cocci bacteria

- Neisseria meningitidis

- Neisseria gonorrhoeae

13

Identify 4 medically important Gram Negative bacilli bacteria

- E.coli

- Klebsiella pneumoniae

- Salmonella typhi

- Haemophilus influenzae

14

Identify two mechanisms of bacterial pathogenesis

- Virulence factors

- Toxins 

15

Identify 4 virulence factors and provide an example for each

- Host entry e.g. polysaccharide capsule

- Adherence to host cells e.g. pili, fimbrae

- Invasiveness e.g. enzymes such as collagenase

- Iron sequestration e.g. siderophores

16

Identify 2 types of toxins and provide and example for each

- Exotoxins e.g. diphtheria toxin

- Endotoxins e.g. lipopolysaccharide

17

Identify 2 types of fungi and provide and example for each

- Yeasts (unicellular) e.g. Candida albicans

- Moulds (multicellular) e.g. Dermatophytes

18

Identify 2 types of parasites and provide and example for each

- Protozoa (unicellular) e.g. Plasmodium falciparum

- Helminths (multicellular) e.g. Roundworms, tapeworms

19

Describe the kinetics of bacterial growth in a liquid medium