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