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streptococci Flashcards

(107 cards)

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1
Q

classification based on temperature

A

academic/bergey’s classification

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2
Q

complete hemolysis?

culture?

A

beta-hemolytic streptococci

clear zone

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3
Q

classification based on hemolytic patterns

A

smith and brown classification

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4
Q

classification based on extraction of c-cho from streptococcal cell wall

A

lancefield classification

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5
Q

group which grows only at 37 C

A

pyogenic group

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6
Q

grow only at 37c and 45c

A

viridans group

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7
Q

all streptococci contains what antigen which is responsible for serological classfication

A

C-carbohydrate

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8
Q

grp of streptococci which is transmitted thru contaminated droplets by cough or sneeze

A

group A streptococci

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9
Q

enzyme produced by s. pyogenes which is oxygen labile

A

streptolysin O

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10
Q

partial hemolytic hemolysis?

culture?

A

alpha-hemolytic streptococci

green hemolysis

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11
Q

no lysis?

culture?

A

gamma-hemolytic streptococci

no change

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12
Q

nagpauso ng lancefield classification

A

rebecca lancefield

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13
Q

c-cho can be extracted from streptococcal cell wall by placing the organisms in ___ & __

A

dilute acid and heating for 10 mins

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14
Q

fever producing bacteria

A

s. pyogenes

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15
Q

characterized by fever, inflammation of heart, joints and BV

A

rheumatic fever

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16
Q

species which exhibits partial hemolysis

A

s. pneumoniae

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17
Q

enzyme which is oxygen stable

A

streptolysin S

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18
Q

appearance of grp A strep in culture

A

small, translucent and smooth

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19
Q

principal virulence factor for grp A strep

A

m-protein

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20
Q

painful reddish patches that enlarge and thicken with a sharply defined edge

A

erysipelas

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21
Q

species with beta, alpha and gamma rxn

A

enterococci

viridans streptococci

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22
Q

what should u do if there is a mixture of hemolytic patterns (mixed colonies)

A

subculture

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23
Q

enzyme responsible for subsurface hemolysis on BAP incubated anaerobically

A

strptolysin O

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24
Q

formerly known as erythrogenic toxins

A

pyrogenic toxins

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25
upper resp tract infection which is caused by the grp A strep? used for diagnosis?
tonsilitis/pharyngitis | throat swab
26
punctate exathem overlying diffuse erythema
scarlet fever
27
susceptibility test for scarlet fever
dick's test
28
degrades proteins; mediates rash in scarlet fever
exotoxin B
29
enzyme responsible for surface hemolysis on BAP incubated aerobically
streptolysin S
30
cardinal signs of scarlet fever
diffused red rash | strawberry-colored tongue
31
grp of streptococci which is nosocomially transmitted
grp B strep
32
diagnostic test for scarlet fever? | result?
``` schultz charlton (+): blanching phenomenon ```
33
specimen used for lab test in grp A strep
throat swab
34
other name for acute glomerulonephritis
bright's disease
35
streptoccoci is belong to what family
streptococcaceae
36
main source of streptokinase
grp C strep
37
differentiate s.pyogenes to other beta-hemolytic grp? | how many units?
bacitracin disc test/Taxo A | 0.04 units
38
diffused and spreading infection characterized by redness and accumulation of fluid
cellulitis
39
+ result for bacitracin
susceptible
40
more specific than bacitracin test?
L-pyrlrolidonyl-a-naphthylamide (pyr) test
41
2 complications for s. pyogenes
rheumatic fever | acute glomerulonephritis
42
group which grows at 10C, 37C and 45C
enterococcus group
43
grp g strep is ____ to bacitracin
resistant/suscpetible
44
virulence factor of grp B strep
capsule (sialic acid)
45
2 notorious pathogens of streptococci
s. pyogenes | s. pbeumoniae
46
appearance of grp b in cultures
grayish white
47
part of normal flora of female genital tract and lower GIT
grp B strep
48
rgt used for CAMP test
B-lysin disk
49
strep which possesses the enzyme hippuricase
s. agalactiae
50
used to differentiate s. agalactiae to others
hippurate hydrolysis test
51
+ result for hippurate hydrolysis test? | what rgt is added?
purple color after adding ninhydrin rgt
52
species of grp C/G
s. dysagalactiae subsp. equisimilus | s. equi subsp. zooepdemicus
53
most common cause of SBE
viridans strep
54
(+) rsult for pyr test
bright/cherry red
55
+ result for CAMP test
arrow head B-hemolysis near s. aureus | bowtie appearance
56
specimens used for diagnosis for lancefield gros of strep
throat swab pus secretions sputum blood
57
grp c is ____ to bacitracin and sxt
susceptible
58
(4) virulence factors of viridans strep
capsule cytolysin extracellular dextran adhesins
59
most commonly isolated viridans strep
s. mutans
60
possesses grp D antigen
s. bovis grp | enterococci
61
often isolated in blood culture with GI carcinoma
bovis grp (s. equinus)
62
culture media used for enterococci
tsb/bhi with 5% sheep's blood
63
grp of strep which are animal pathogens
grp c & g
64
CAMP means
Christie, Atkinson, Munch, Petersen test
65
formerly known as grp D strep
enterococci
66
(+) to 6.5% nacl? | result?
entrococci | turbid
67
most common isolate of enterococci
e. faecalis
68
specimens for diagnosing enterococci
blood urine wound secretions
69
has a characteristic "sweet odor of honeysuckle/butterscotch"
s. anginosus grp
70
mostly significant in classifying and identifying B-hemolytic strep
lancefield classification
71
to create anaerobiosis (streptolysin O)
stab (using inoculating needle) the agar
72
detects recent infection with s. pyogenes
anti-streptolysin O test
73
broth used to detect genital carriage of grp B strep during pregnancy
todd hewitt broth w/ 10 ug/mL of colistin
74
culture which is utilized for vaginal or rectal swabs from pregnant women
carrot broth/granada agar
75
enterococci: gram stain rxn
gram + cocci in pairs and long chains
77
used to suppress vaginal flora
15 ug/mL of nalidixic acid
78
all pregnant women be screened for grp B strep at?
35-37 wks of gestation
79
SBE means
subacute bacterial endocarditis
80
main source of streptokinase
grp C strep
81
oropharyngeal commensals
viridans streptococci
82
e.faecalis requires ___ for growth
B12
83
enterococci grow in 3 extreme conditions
alkaline pH grow at 45 C salt solutions
84
flesh-eating syndrome
necrotizing fasciitis
85
only beta-hemolytic strep (+) to pyr test? | rgt added?
s. pyogenes | 0. 01% p-dimethyl-aminocinnamaldehyde
86
flesh-eating syndrome
necrotizing fasciitis
87
only beta-hemolytic strep (+) to pyr test? | rgt added?
s. pyogenes | 0. 01% p-dimethyl-aminocinnamaldehyde
88
(+) rsult for pyr test
bright/cherry red
89
which is part of normal flora, grp A or B strep
grp b strep
89
all pregnant women be screened for grp B strep at?
35-37 wks of gestation
91
(+) rsult for camp test
bowtie appearance
92
animal pathogens
grp C strep
93
main source of streptokinase
grp C strep
94
also known as alpha prime strep
viridans strep
95
(+) result for bile esculin
black color
96
natural inhabitants of intestinal tracts
enterococci
97
beta-hemolytic grp b strep produces ____ in carrot broth after __ hrs of incubation
orange/red pigment | 6
98
(+) to 6.5% nacl? | result?
entrococci | turbid
98
e.faecalis requires ___ for growth
B12
99
beta-hemolytic grp b strep produces ____ in carrot broth after __ hrs of incubation
orange/red pigment | 6
100
which is part of normal flora, grp A or B strep
grp b strep
101
(+) rsult for camp test
bowtie appearance
102
animal pathogens
grp C strep
103
main source of streptokinase
grp C strep
104
also known as alpha prime strep
viridans strep
105
(+) result for bile esculin
black color
105
natural inhabitants of intestinal tracts
enterococci
106
m-protein has 4 characteristics
type specific adheres to mucosal cell wall attaches to peptidoglycan antiphagocytic

Microbiology (6 decks)

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