Common Bacterial Pathogens Flashcards Preview

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Flashcards in Common Bacterial Pathogens Deck (26):
1

List six major Gram-positive coccus bacteria.

Staphylococcus aureus, staphylococcus epidermis (SSNA), streptococcus pyogenes, streptococcus pneumoniae, streptococcus viridans, and enterococcus faecium

2

Two common sites of benign s. aureus growth are _________.

the anterior nares and the perineum

3

S. aureus has been known to cause _________.

cutaneous infections, toxic shock, and pneumonia

4

Coagulase converts __________.

fibrinogen to fibrin, without the need of the rest of the coagulation cascade

5

What does Protein A bind?

It binds the Fc receptor of Ig, thereby precluding phagocytosis

6

Explain the pathophysiology of SSSS.

Staphylococcal scalded skin syndrome occurs when staphylococcal bacteria secrete serine proteases that degrade desmoglein I.

7

Which Gram-positive cocci will be in clusters? In diads?

Staphylococcus will be in clusters; streptococcus will be diplo-.

8

Gram-positive, catalase-positive, coagulase-positive coccus?

Staphylococcus aureus

9

Staphylococcus aureus commonly cause _________.

cutaneous infections, poor-prognosis pneumonia, foreign-body infections (such as a catheter), and bacterial endocarditis

10

Gram-positive, catalase-positive, coagulase-negative coccus that produces glycocalx?

Staphylococcus epidermis

11

Group A streptococcus are ___________.

streptococcus pyogenes

12

M protein is found on _________ and help them to ________.

streptococcus pyogenes; adhere to the throat, evade phagocytosis, and killing by PMNs

13

Cutaneously, staphylococcus aureus tend to form ________, while streptococcus pyogenes tend to form _______.

focal abscesses; spreading, non-raised infections

14

Streptococcus pneumoniae can lead to ________.

pneumonia (very common), sinusitis, otitis media, and bronchitis

15

Enterococcus faecium frequently causes ___________.

UTIs, biliary tract infections, endocarditis, and surgical wound infections

16

Clostridia are Gram-__________.

positive

17

Clostridia are _______ anerobes.

strict (will die if exposed to O2)

18

Botulism occurs by ingestion of the ___________.

preformed toxin

19

Eschericia coli and pseudomonas aeruginosa are both ________.

Gram-negative rods

20

The three most common types of Eschericia coli infections are ____________.

UTIs (from "special" endogenous species getting into the urinary tract), abdominal infections (from perforated abdominal tissue, such as during surgery), and GI tract infections (from unique strains of E. coli that have pili which can adhere to the GI mucosa)

21

The three most common types of Pseudomonas aeruginosa infection are _____________.

cystic fibrosis opportunistic infections, burns and traumatic wounds, and nosocomial infections

22

Neisseria gonorrhoeae is a ______________.

Gram-negative diplococcus

23

Rickettsia and chlamydia are both ____________.

obligate intracellular bacteria

24

The STI form of chlamydia is ________.

Chlamydia trachomatis

25

Mycoplasma pneumoniae lack _________, and hence do not __________.

cell walls; Gram stain

26

Prevnar is a vaccine for ___________.

Streptococcus pneumoniae

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