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[3Y1S] MT 6320 > U2.2.1 Gr (+) Cocci : Staphylococcus & Microccus > Flashcards

U2.2.1 Gr (+) Cocci : Staphylococcus & Microccus Flashcards

(65 cards)

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1
Q

Generalities
Belong to Family Micrococcacea

A

Micrococci

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2
Q

Generalities
Gram (+) cocci in clusters; in tetrads

A

Micrococci

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3
Q

Generalities
Usually normal flora and associated with skin lesions and more commonly isolated among immunocompromised patients

A

Micrococci

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4
Q

Generalities
May be found in the environment

A

Micrococci

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5
Q

Odd One Out
Other gram positive cocci that may be mistaken for Staphylococcus are the following:

a. Rothia mucilaginosa/Stomatococcus mucilanginosus
b. Aerococcus
c. Allorococcus otitis
d. Micrococcus luteus

A

d. Micrococcus luteus

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6
Q

Generalities
emerging pathogen (UTI, endocarditis)

A

Rothia mucilaginosa/Stomatococcus mucilanginosus

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7
Q

Generalities
Belong to Family Staphylococcacae

A

Staphylococci

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8
Q

Generalities
Gr (+) Cocci (0.5-1.5 um) in clusters, in pairs, singly

A

Staphylococci

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9
Q

Staphylococci

All are Catalase (+) except

A

AS
1. S. aureus subsp anaerobius
2. S. saccharoluticus

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10
Q

Staphylococci
All are Modified Oxidase (-)

A

SLV
1. S. sciuri
2. S. lentus
3. S. vitulus

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11
Q

T/F All Staphylococci are Motile and non-sporeformers

A

F, all are non-motile and non-spore formers. Bacilli are motile

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12
Q

also called as grape-like clusters

A

Staphylococci

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13
Q

Staphylococci
Gaseous requirements are aerobic or facultative anaerobe except

A

AS (same as + in catalase testing)
1. Staphylococcus aureus subspecies
anaerobius
2. Staphylococcus saccharolyticus

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14
Q

T/F Staphylococci are halophilic and nitrate reducers.

A

T

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15
Q

Staphylococci
Colonical Morphology
Size, Elevation, Consistency, Color

A

Pinhead/Medium-sized, raised, creamy, lemon yellow or golden yellow colonies

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16
Q

Staphylococci
S. albus color

A

white

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17
Q

Staphylococci
S. aureus color

A

golden yellow

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18
Q

Staphylococci
S. citreus color

A

lemon yellow

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19
Q

T/F Other species in Staphylococcus are non-pigmented

A

T

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20
Q

An initial test is performed to differentiate the Staphylococcus species

A

Coagulase Test

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21
Q

Most clinically significant coagulase producing Staphylococci

A

Staphylococcus aureus

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22
Q

Coagulase Producing Staphylococci

A

Staphylococcus aureus, other coagulase-producing staphylococci

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23
Q

Odd One Out
Other Coagulase Producing Staphylococci :
a. S. intermedius
b. S. pseudointermedius
c. S. byicus
d. S. delphini
e. S. lutrae,

A

None, all are coagulase producing Staphylococci HSHJAHHSAJSHASHJAHSHAHAHAHA

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24
Q

Odd One Out
Other Coagulase Producing Staphylococci :
a. S. agnetis
b. some strains of S. schleiferi
c. S. hyicus
d. S. haemolyticus
e. S. scheliferi

A

d. S. haemolyticus

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25
2 groups of Coagulase Negative Staphylococci (CONS)
Novobiocin Susceptible & Novobiocin Resistant
26
Novobiocin Susceptible Staphylococci (Choose 2) a. S. epidermidis b. S. saprophyticus c. S. xylosus d. S. haemoliticus
S. epidermidis & S. haemoliticus`
27
Novobiocin Resistant Staphylococci (Choose 2) a. S. epidermidis b. S. saprophyticus c. S. xylosus d. S. haemoliticus
S. saprophyticus & S. xylosus
28
Clinically Significant Staphylococci (4)
Staphylococcus aureus Staphylococcus epidermidis Staphylococcus lugdunensis Staphylococcus saprophyticus
29
Odd one out Less common but implicated as opportunistic pathogens a. S. warneri b. S. capitis c. S. epidermidis d. S. hominis e. S. schleiferi f. S. haemoluticus
c. S. epidermidis
30
Most clinically significant Staphylococcus species
Staphylococcus aureus
31
Can be recovered from almost any clinical specimen
Staphylococcus aureus
32
Odd one out Virulence Factors of S. aureus a. Hemolysins (alpha, beta, gamma and delta) b. Panton Valentine Factor - Leukocidin c. Beta-Lactamase d. PBP1
d. PBP1; should be PBP2
33
Impotant Virulence Factors of S.aureus
Protein A, Capsular Polysaccharide, Peptidoglycan & Techoic Acids, Nucleases
34
S. aureus Heat Stable Toxins
Enterotoxins
35
S. aureus Enterotoxins for Staphylococcal Food Poisoning
Toxins A, B, D
36
S. aureus causes almost all cases of menstruating TSS
TSST-1
37
S. aureus also known as Epidermolytic Toxin
Exfoliative Toxin
38
S. aureus Toxin implicated in Ritter-Lyell Disease or Scalded Skin Svndrome or Dermatitis Exfoliativa
Exfoliative Toxin
39
S. aureus Also implicated in Bullous Impetigo
Exfoliative Toxin
40
S. aureus suppurative infections
Skin Wound Infections
41
Odd One Out Skin Wound Infections caused by S. aureus a. Folliculitis b. Rashes c. Furuncles (boils) d. Carbuncles e. Bullous impetigo f. Acne
b. Rashes
42
S. aureus Exfoliative dermatitis that occurs among newborns and previously healthy young children; also seen among adults with chronic renal failure
SSS: Scalded Skin Syndrome
43
S. aureus Multisystemic disease
Toxic Shock Syndrome
44
S. aureus has 2 categories : Menstruating Associated and Non- menstruating associated
Toxic Shock Syndrome
45
S. aureus S/S: sudden onset of fever, chills, vomiting, diarrhea, muscle pain, rashes, can progress to hypotension and shock
Toxic Shock Syndrome
46
S. aureus Involves the ingestion of a preformed enterotoxin from food that is improperly stored
Staphylococcal Food Poisoning
47
S. aureus S/S: appear rapidly (incubation period: 2-8hrs); nausea, vomiting, diarrhea, abdominal pain
Staphylococcal Food Poisoning
48
S. aureus most common enterotoxin in staphylococcal food poisoning
Enterotoxin A
49
Most common other infection of S. aureus
Osteomyelitis
50
Odd One Out Other infections of S aureus include : a. Osteomvelitis b. Staphylococcal pneumonia c. Staphylococcal bacteremia d. Staphylococcal sepsis e. Endocarditis f. Staphylococcal osteomyelitis g. Septic Arthritis
d. Staphylococcal sepsis
51
Staph species Usually a normal inhabitant of the skin (predominant)
S. epidermis
52
Staph species Most common cause of of prosthetic valve endocarditis
S. epidermis
53
Staph species Common cause of nosocomial UTIs & prosthetic valve endocarditis
S. epidermis
54
Staph species Causes "stitch abscess"
S. epidermis
55
Staph species 50% of CONS isolates
S. epidermis
56
Staph species 2nd most Common cause of UTIs
S. saprophyticus
57
Staph species Associated with pyelonephritis and cystitis in young women and in older men using catheters
S. saprophyticus
58
Staph species Colony counts may be <100,000 CFU / mI but is still significant to be considered as a cause of UTI
S. saprophyticus
59
Staph species A cause o f nosocomial infections such as endocarditis, septicemia, meningitis and skin and soft tissue infections
S. lugdunensis
60
Staph species Positive for Clumping Factor (slide coagulase)
S. lugdunensis
61
Staph species Causes an aggressive type of endocarditis
S. lugdunensis
62
Staph species High Mortality Rate
S. lugdunensis
63
Other Staphylococci scalp
S. capitis
64
Other Staphylococci Some are normal flora of animals
S. intermedius, S. delphini, S. pseudointermedius
65
ODD ONE OUT Other Staphylococci include a. S. warneri b. S. hominis c. S. schleiferi d. S. haemoluticus
All are staphylococci species

[3Y1S] MT 6320 (8 decks)

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