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bacte lab > STREPTOCOCCUS > Flashcards

STREPTOCOCCUS Flashcards

1
Q

STREPTOCOCCUS CHARACTERISTICS

A

G (+) cocci in pairs/ in chains,
nonmotile
NSF
Catalase (-)
Facultative anaerobes
Oxidase (-)
growth is enhanced by blood, serum, or glucose

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2
Q

Lancefield Classification
Group A

A

Streptococcus pyogenes
Beta Hemolysis

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3
Q

Lancefield Classification
Group B

A

Streptococcus agalactiae
Beta Hemolysis

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4
Q

Lancefield Classification
Group C

A

S. equisimilis
S. zooepidimicus
S. equi
S. dysagalactiae
Beta Hemolysis

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5
Q

Lancefield Classification
Group D Enterococci

A

E. faecalis
E. faecium
E. durans
E. avium
Beta Hemolysis

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6
Q

Lancefield Classification
Group D Non Enterococci

A

S. bovis
S. equinis
Beta Hemolysis

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7
Q

Alpha Hemolytic Reaction

A

S. pneumoniae

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8
Q

Alpha and Gamma Hemolytic Reaction

A

Virdans
Streptococci

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9
Q
  • Group A
  • Beta hemolysis pattern
  • Pathogenic to man acquired through
    droplets
  • flesh-eating bacteria
A

STREPTOCOCCUS PYOGENES

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10
Q

VIRULENCE FACTORS OF S. pyogenes

A

M protein
Protein F
Lipoteichoic Acid

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11
Q

ENZYMES AND TOXINS THAT ARE
PRODUCED by S. pyogenes

A

Hemolysin
Streptolysin O
Streptolysin S
Deoxyribonuclease
Streptokinase
Hyaluronidase
Pyrogenic Toxins

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12
Q

CLINICAL INFECTION of S. pyogenes

A

Pharyngitis/Strep throat
Impetigo
Scarlet fever
Cellulitis
Erysipelas
Necrotizing fasciitis
Streptococcal Toxic Shock Syndrome

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13
Q
  • Group B
  • Beta hemolytic pattern
  • Normal flora in the female genital urinary
    tract.
  • Nosocomial transmitted but infects the
    fetus and infants
A

STREPTOCOCCUS AGALACTIAE

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14
Q

VIRULENCE FACTORS OF S. agalactiae

A

Capsule
Hemolysin
CAMP factor
Neuraminidase
Dnase
Hyaluronidase
Hyaluronidase
Protease

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15
Q

CLINICAL INFECTION of S. agalactiae

A

Pneumonia
Meningitis
Sepsis
Postpartum Infection
Osteomyelitis
UTI
Endocarditis

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16
Q
  • Beta hemolytic pattern
  • Animal pathogen
  • Have Streptokinase enzyme
A

GROUP C STREPTOCOCCI

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17
Q

GROUP D STREPTOCOCCI
CLINICAL INFECTIONS

A

Wound infection
Endocarditis
UTI
Sepsis

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18
Q

These are oropharyngeal commensals

A

S. mutans group
Salivarius
S. bovis
S. constellatus

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19
Q

dental caries and sub-acute endocarditis

A

S. mutans

20
Q
  • Pneumococcus
  • Lancet or oval bullet shape
  • Common isolate both as a pathogen and
    as a member of normal flora.
A

STREPTOCOCCUS PNEUMONIAE

21
Q
  • Normal flora and pathogens in the
    respiratory tract.
  • Colonies Appearance: Dome Shape
  • In other book: Cone with ice cream
A

STREPTOCOCCUS PNEUMONIAE

22
Q

CLINICAL INFECTIONS IN STREPTOCOCCUS PNEUMONIAE

A

Bacterial lobarpneumonia
Bacteria meningitis in adults
Otitis media
Bacteremia
Endocarditis

23
Q

VIRULENCE FACTORS OF STREPTOCOCCUS PNEUMONIAE

A

Capsular
Polysaccharide
Hemolysin
Immunoglobulin A
Protease
Neuraminidase
Hyaluronidase

24
Q

BACITRACIN SUSCEPTIBILITY TEST RESISTANT

A

Group B. (S. agalactiae)

25
Q

BACITRACIN SUSCEPTIBILITY TEST SENSTIVE

A

Group A. (S. pyogenes)

26
Q

SULFAMETHOXAZOLETRIMETHROPRIM SUSCEPTIBILITY TEST RESISTANT

A

Group A. (S. pyogenes)

27
Q

SULFAMETHOXAZOLETRIMETHROPRIM SUSCEPTIBILITY TEST SENSTIVE

A

Group B. (S. agalactiae)

28
Q

The arrowhead hemolytic pattern results when
the organism is streak perpendicular to betahemolytic staphylococcus aureus.

A

CHRISTIE-ATKINS-MUNCH-PETERSON
(CAMP TEST)

29
Q

POSITIVE FOR CAMP TEST

A

“ARROWHEAD
HEMOLYSIS”
Group B. (S. agalactiae)

30
Q

NEGATIVE FOR CAMP TEST

A

NO ZONE OF HEMOLYSIS
Group A. (S. pyogenes)

31
Q

Hipurric acid is converted to glycine and benzoic
acid in the presence of enzyme hippuricase.
Ninhydrin added to glycine produces purple
color
The end product of the hippurate-hydrolysis test is purple color/deep purple color.

A

HIPPURATE HYDROLYSIS TEST

32
Q

POSITIVE FOR HIPPURATE HYDROLYSIS TEST

A

DEEP PURPLE COLOR
B. (S. agalactiae)

33
Q

NEGATIVE FOR HIPPURATE HYDROLYSIS TEST

A

YELLOW PINK
OR COLORLESS
A. (S. pyogenes)

34
Q

RESISTANT IN OPTOCHIN (TAXO P)

A

VIRIDANS STREPTOCOCCI

35
Q

SENSITIVE IN OPTOCHIN TAXO P

A

PNEUMOCOCCI

36
Q

2 KINDS of OPTOCHIN

A
  1. 10 microgram disks
  2. 6 microgram disks
37
Q

more concentration of
antibiotics
- Zone of inhibition: at least 14 mm

A

10 microgram disks

38
Q
  • Zone of inhibition: 10 mm
A

6 microgram disks

39
Q

Greater 14 ml zone on inhibition

A

SUSCEPTIBLE/SENSITIVE
(STREPTOCOCCUS PNEUMONIA)

40
Q

SUSCEPTIBLE/SENSITIVE
(STREPTOCOCCUS PNEUMONIA)

A

RESISTANT (VIRIDANS STREPTOCOCCI)

41
Q

 For capsular swelling
 S. pneumoniae has capsule- POSITIVE

A

NUEFELD- QUELLUNG

42
Q

Salt Tolerance Test
(Growth In 6.5%) POSITIVE

A

GROUP D ENTEROCOCCUS

43
Q

Salt Tolerance Test
(Growth In 6.5%) NEGATIVE

A

GROUP D NON ENTEROCOCCUS

44
Q

Penicillin Susceptibility Test RESISTANT

A

GROUP D ENTEROCOCCUS

45
Q

Penicillin Susceptibility Test SUSCEPTIBLE

A

GROUP D NON ENTEROCOCCUS

46
Q

Pyrrolidonyl Arylamidase (PYR) POSITIVE

A

GROUP D ENTEROCOCCUS

47
Q

Pyrrolidonyl Arylamidase (PYR) NEGATIVE

A

GROUP D NON ENTEROCOCCUS

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