3. Family Staphylococcaceae Flashcards Preview

Elsevier Bacteriology (RVSP) > 3. Family Staphylococcaceae > Flashcards

Flashcards in 3. Family Staphylococcaceae Deck (52):
1

Catalase reaction of the family Staphylococcaceae

Catalase positive

2

Oxygen requirements of the family Staphylococcaceae

Aerobic to facultative anaerobic

3

Motility of the family Staphylococcaceae

Nonmotile

4

Carbohydrate fermented by the family Staphylococcaceae

Glucose

5

Test used to differentiate species of the family Staphylococcaceae

Coagulase test

6

Clinically significant coagulase-positive species of the family Staphylococcaceae

Staphylococcus aureus

7

Clinically significant coagulase-negative species of the family Staphylococcaceae

S. epidermidis
S. saprophyticus

8

Most clinically important species of the family Staphylococcaceae

S. aureus

9

Natural reservior of S. aureus

Humans

10

Shortly after birth, where does S. aureus colonize?

Nasopharynx
Perineum skin

11

MOT of S. aureus

Direct contact with a colonized carrier

12

True/False. Symptomatic colonization is more common than asymptomatic colonization of S. aureus

False

Asymptomatic colonization is more common

13

Superficial skin lesions caused by S. aureus

Furuncles
Impetigo
Boils
Sties

FIBS

14

Invasive diseases caused by by S. aureus

Pneumonia
Arthritis
Mastitis
Endocarditis
Meningitis
Osteomyelitis

PAMEMO

15

Toxin diseases caused by S. aureus

- Scalded skin syndrome (Ritter's disease)
- Toxic shock syndrome

16

Localized presentation of Scalded Skin Syndrome

Bullous impetigo (large pustule)

17

Generalized presentation of Scalded Skin Syndrome

Profuse peeling of the epidermal layer of skin

18

S. aureus toxin that causes Toxic Shock Syndrome

Toxic shock syndrome toxin-1 (TSST-1)/Enterotoxin F

19

S. aureus disease that has a higher prevalence with tampon use

Toxic shock syndrome

20

S. aureus species that are resistant to antibiotics

- Oxacillin-resistant S. aureus (ORSA)
- Methicillin-resistant S. aureus (MRSA)

21

Antibiotics that ORSA and MRSA are resistant to

Methicillin
Oxacillin
Nafcillin
Penicillin
Amoxicillin

MONPA

22

Nondissemination of S. aureus results to

Local disease (e.g., boils)

23

Dissemination of S. aureus results to

Pneumonia
Bone and joint infection

24

S. aureus heat-stable exotoxins that cause diarrhea and vomiting

Enterotoxins

25

Enterotoxins that are resistant to gastric and digestive acids

Enterotoxins A & D

26

True/False. Toxins are preformed in foods

True

27

S. aureus toxin that causes sloughing of the skin; also causes widespread systemic immune response

Epidermolytic toxin

28

S. aureus toxin, similar to TSST-1 but a different site in skin

Exfoliative toxin

29

S. aureus hemolysin that destroys RBCs, platelets and tissue

Alpha α-hemolysin

30

S. aureus hemolysin that destroys RBCs

Beta β-hemolysin

31

S. aureus hemolysin that causes injury, less lethal

Gamma δ-hemolysin

32

S. aureus exotoxin that is lethal to PMNs; may suppress phagocytosis

Panton-Valentine leukocidin

33

S. aureus enzyme that causes coagulation of surrounding

Coagulase

34

S. aureus enzyme that hydrolyzes hyaluronic acid in connective tissue

Hyaluronidase

35

S. aureus enzyme that aids colonization by acting on sebaceous glands

Lipase

36

S. aureus enzyme that breaks down antistaphylococcal lipids made by the host

Fatty acid-modifying enzyme

37

Protein that is found in S. aureus cell wall; bind Fc portion of Ig to avoid phagocytosis

Protein A

38

Most common cause of hospital-acquired urinary tract infection

S. epidermidis

39

Staphylococcous spp. that is predominantly hospital acquired

S. epidermidis

40

Staphylococcous spp. that causes UTI; predominant in young, sexually active women

S. saprophyticus

41

Media used for lab diagnosis of Staphylococcal infections

CHROMagar
CHROMagar MRSA
CNA
Mannitol salt agar
PEA

42

Colony morphology of S. aureus

Medium to large
Ivory to yellow
Beta-hemolytic

43

Catalase reaction of S. aureus

Catalase positive

44

Coagulase reaction of S. aureus

Coagulase positive

45

Does S. aureus grow in Mannitol salt agar?

Yes

46

Colony morphology of S. epidermidis

Small to medium
White
Nonhemolytic

47

Coagulase reaction of S. epidermidis

Coagulase negative

48

Colony morphology of S. saprophyticus

Large
50% produces a yellow pigment

49

Coagulase reaction of S. saprophyticus

Coagulase negative

50

Novobiocin susceptibility of S. saprophyticus

Novobiocin resistant

51

S. aureus toxin that causes Scalded Skin Syndrome (Ritter's disease)

Epidermolytic toxin

52

Microscopic characteristics of the family Staphylococcaceae

Gram-positive cocci in clusters or tetrads