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

3. Family Staphylococcaceae Flashcards

1
Q

Catalase reaction of the family Staphylococcaceae

A

Catalase positive

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2
Q

Oxygen requirements of the family Staphylococcaceae

A

Aerobic to facultative anaerobic

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3
Q

Motility of the family Staphylococcaceae

A

Nonmotile

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4
Q

Carbohydrate fermented by the family Staphylococcaceae

A

Glucose

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5
Q

Test used to differentiate species of the family Staphylococcaceae

A

Coagulase test

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6
Q

Clinically significant coagulase-positive species of the family Staphylococcaceae

A

Staphylococcus aureus

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7
Q

Clinically significant coagulase-negative species of the family Staphylococcaceae

A

S. epidermidis

S. saprophyticus

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8
Q

Most clinically important species of the family Staphylococcaceae

A

S. aureus

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9
Q

Natural reservior of S. aureus

A

Humans

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10
Q

Shortly after birth, where does S. aureus colonize?

A

Nasopharynx

Perineum skin

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11
Q

MOT of S. aureus

A

Direct contact with a colonized carrier

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12
Q

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

A

False

Asymptomatic colonization is more common

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13
Q

Superficial skin lesions caused by S. aureus

A

Furuncles
Impetigo
Boils
Sties

FIBS

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14
Q

Invasive diseases caused by by S. aureus

A 
Pneumonia
Arthritis
Mastitis
Endocarditis
Meningitis
Osteomyelitis

PAMEMO

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15
Q

Toxin diseases caused by S. aureus

A
  • Scalded skin syndrome (Ritter’s disease)

- Toxic shock syndrome

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16
Q

Localized presentation of Scalded Skin Syndrome

A

Bullous impetigo (large pustule)

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17
Q

Generalized presentation of Scalded Skin Syndrome

A

Profuse peeling of the epidermal layer of skin

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18
Q

S. aureus toxin that causes Toxic Shock Syndrome

A

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

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19
Q

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

A

Toxic shock syndrome

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20
Q

S. aureus species that are resistant to antibiotics

A
  • Oxacillin-resistant S. aureus (ORSA)

- Methicillin-resistant S. aureus (MRSA)

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21
Q

Antibiotics that ORSA and MRSA are resistant to

A 
Methicillin
Oxacillin
Nafcillin
Penicillin
Amoxicillin

MONPA

22
Q

Nondissemination of S. aureus results to

A

Local disease (e.g., boils)

23
Q

Dissemination of S. aureus results to

A

Pneumonia

Bone and joint infection

24
Q

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

A

Enterotoxins

25
Q

Enterotoxins that are resistant to gastric and digestive acids

A

Enterotoxins A & D

26
Q

True/False. Toxins are preformed in foods

A

True

27
Q

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

A

Epidermolytic toxin

28
Q

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

A

Exfoliative toxin

29
Q

S. aureus hemolysin that destroys RBCs, platelets and tissue

A

Alpha α-hemolysin

30
Q

S. aureus hemolysin that destroys RBCs

A

Beta β-hemolysin

31
Q

S. aureus hemolysin that causes injury, less lethal

A

Gamma δ-hemolysin

32
Q

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

A

Panton-Valentine leukocidin

33
Q

S. aureus enzyme that causes coagulation of surrounding

A

Coagulase

34
Q

S. aureus enzyme that hydrolyzes hyaluronic acid in connective tissue

A

Hyaluronidase

35
Q

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

A

Lipase

36
Q

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

A

Fatty acid-modifying enzyme

37
Q

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

A

Protein A

38
Q

Most common cause of hospital-acquired urinary tract infection

A

S. epidermidis

39
Q

Staphylococcous spp. that is predominantly hospital acquired

A

S. epidermidis

40
Q

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

A

S. saprophyticus

41
Q

Media used for lab diagnosis of Staphylococcal infections

A 
CHROMagar
CHROMagar MRSA
CNA
Mannitol salt agar
PEA
42
Q

Colony morphology of S. aureus

A

Medium to large
Ivory to yellow
Beta-hemolytic

43
Q

Catalase reaction of S. aureus

A

Catalase positive

44
Q

Coagulase reaction of S. aureus

A

Coagulase positive

45
Q

Does S. aureus grow in Mannitol salt agar?

A

Yes

46
Q

Colony morphology of S. epidermidis

A

Small to medium
White
Nonhemolytic

47
Q

Coagulase reaction of S. epidermidis

A

Coagulase negative

48
Q

Colony morphology of S. saprophyticus

A

Large

50% produces a yellow pigment

49
Q

Coagulase reaction of S. saprophyticus

A

Coagulase negative

50
Q

Novobiocin susceptibility of S. saprophyticus

A

Novobiocin resistant

51
Q

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

A

Epidermolytic toxin

52
Q

Microscopic characteristics of the family Staphylococcaceae

A

Gram-positive cocci in clusters or tetrads

Elsevier Bacteriology (RVSP) (34 decks)

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