Microbiology Bacteria - First Aid Flashcards Preview

► Med - Step 1 > Microbiology Bacteria - First Aid > Flashcards

Flashcards in Microbiology Bacteria - First Aid Deck (357)
Loading flashcards...
1

Function of Peptidoglycan

gives rigid support, protects against osmotic pressure

2

Composition of Peptidoglycan

sugar backbone with peptide side chains cross-linked by transpeptidase

3

Cell wall/cell membrane (gram positives) function

major surface antigen

4

Cell wall/cell membrane composition

peptidoglycan for support; lipoteichoic acid that induces TNF and IL-1

5

Outer membrane (gram negatives) function

site of endotoxin (lipopolysaccharide (LPS)): major surface antigen

6

Outermembrane composition

Lipid A induces TNF and IL-1; O polysaccharide is the antigen.

7

Plasma membrane function

site of oxidative and transport enzymes

8

Plasma membrane composition

phospholipid bilayer

9

Ribosome function

protein synthesis

10

Ribosome composition

50S and 30S subunits

11

Periplasm function

space between the cytoplasmic membrane and outer membrane in gram negative bacteria

12

Periplasm composition

contains many hydrolytic enzymes, including beta-lactamases

13

Capsule function

protects against phagocytosis

14

Capsule composition

polysaccharide (except Bacillus anthracis which contains D-glutamate)

15

Pilus/fimbria function

mediate adherence of bacteria to cell surface; sex pilus forms attachment between 2 bacteria during conjugation

16

Pilus/fimbria composition

glycoprotein

17

Flagellum function

motility

18

Flagellum composition

protein

19

Spore function

resistant to dehydration, heat and chemicals

20

Spore composition

keratin-like coat; dipicolinic acid; peptidoglycan

21

Plasmid function

consists of a variety of genes for antibiotic resistance, enzymes and toxins

22

Plasmid composition

DNA

23

Glycocalyx function

mediates adherence to surfaces, especially foreign surfaces (indwelling catheters)

24

Glycocalyx composition

polysaccharide

25

Circular (coccus) gram positives

Staphylococcus
Streptococcus

26

Circular (coccus) gram negatives

Neisseria

27

Rod (bacillus) gram positives

Clostridium
Corynebacterium
Bacillus
Listeria
Mycobacterium (acid fast)
Gardnerella (gram variable)

28

Rod (bacillus) gram negative enterics

E. coli
Shigella
Salmonella
Yersinia
Klebsiella
Proteus
Enterobacter
Serratia
Vibrio
Campylobacter
Helicobacter
Pseudomonas
Bacteroides

29

Rod (bacillus) gram negative respiratory

Haemophilus (pleomorphic)
Legionella (silver)
Bordetella

30

Rod (bacillus) gram negative zoonotics

Francisella
Brucella
Pasteurella
Bartonella