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[7] Gram-positive and Gram-negative Cocci > Streptococcaceae > Flashcards

Streptococcaceae Flashcards

1
Q

Staining Reaction and Shape

A

Gram-positive

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2
Q

Motility

A

Non-motile

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3
Q

capsule

A

Encapsulated/non-encapsulated

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4
Q

Catalase

A

Catalase negative

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5
Q

organisms

A

Homolactic acid organisms

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6
Q

Encapsulated Streptococcus

A

Streptococcus pyogenes

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7
Q

Habitat of Streptococcus pyogenes

A

 Human throat

 Not the normal flora of skin

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8
Q

transmission of Streptococcus pyogenes

A

via respiratory droplets

contact with cutaneous lesions

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9
Q

 Anti-phagocytic
o With Fibronectin binding proteins
 Antigenic variation

A

M PROTEIN

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10
Q

 Has hyaluronic acid

 Anti-phagocytic

A

CAPSULE

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11
Q

 Streptococcal Pyrogenic Exotoxin
 Lyosogenized strains
 Responsible for Scarlet Fever

A

ERYTHROGENIC TOXIN (EGT)

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12
Q

 Diagnostic test for Scarlett Fever
 Intradermal injection for ANTIEGT
 BLANCHING PHENOMENON

A

SCHULTZ-CHARLTON TEST

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13
Q

Susceptible: Rash

A

o DICK’S TEST

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14
Q 
 Oxygen labile
 Immunogenic (ASTO)
 Stab-technique
 Pour plate technique
 Agar overlay
A

STREPTOLYSIN O

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15
Q

 Oxygen stable
 Serum extractable
 Has affinity for serum

A

STREPTOLYSIN S

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16
Q

 Epidermis

 Yellow crust

A

PYODERMA/IMPETIGO

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17
Q

 Dermal inflammation

 Thickening of the skin

A

ERYSIPELAS

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18
Q

 Strep throat
 Acute
 Dysphagia

A

PHARYNGITIS

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19
Q

 Direct extension

 Hematogenous route

A

PNEUMONIA

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20
Q

NECROTIZING PASCITIS is an Inflammation and necrosis of:

A

o Skin
o Subcutaneous fat
o Fascia

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21
Q

 Flesh eating disease
 3 categories
o Type 2: Group A Streptococci

A

NECROTIZING PASCITIS

22
Q

 Sandpaper like rash
 Starts on the trunk
 “strawberry tongue”

A

SCARLET FEVER

23
Q

 Child Birth Fever

 Infection after delivery

A

PUERPERAL FEVER

24
Q

 Complications

 Autoimmune diseases

25
Q

 5 weeks
 Joints
 May affect the heart
 Development to RHD

A

RHEUMATIC FEVER

26
Q 
 After Cutaneous Infection or Strep
Throat
 Edema of lower limbs
 Hypertension
 Dark and smokey urine
A

ACUTE GLORUMERONEPHRITIS

27
Q

 Encapsulated

 BOVINE MASTITIS

A

Streptococcus agalactiae

28
Q

habitat of Streptococcus agalactiae

A

Vagina and rectal area

29
Q

TRANSMISSION of Streptococcus agalactiae

A

Vertical transmission

30
Q

 First 3 days after birth

 High mortality rate

A

NEONATAL MENINGITIS

31
Q

NEONATAL MENINGITIS is Associated with

A 
o Obstetric
complications
o Rupture of
membranes
o Premature birth
32
Q

remains as a significant cause of invasive disease in the newborn

33
Q

Can grow in extreme conditions

Resistant to most antimicrobial agents

A

ENTEROCOCCI

34
Q

ENTEROCOCCI VIRULENCE FACTORS

A

GELATINASE
SERINE
PROTEASE
CYTOLYSIN

35
Q

NONENTEROCOCCI VIRULENCE FACTORS

A

ADHESINS
HYALURONIDASE
DNASE

36
Q

Immunosupression

A

PREDISPOSING FACTOR

37
Q

 LANCET-SHAPED DIPLOCOCCI
 Fastidious
 Capnophilic

A

Streptococcus pneumoniae

38
Q

Streptococcus pneumoniae: habitat

A

 Human throat

 Nasopharynx

39
Q

Streptococcus pneumoniae: TRANSMISSION

A

Acquired endogenously

40
Q

Delays ingestion by phagocytes thereby promoting multiplication of the organism in the tissues of the host.

41
Q

 Exhibits toxicity for pulmonary endothelial cells and direct
effect on cilia that contributes to the disruption of
endothelial barrier.
 Facilitates the access of pneumococci to the alveoli and
eventually their spread beyond into the bloodstream.
 Lyses phagocytes and suppresses host inflammatory and
immune functions.

A

PNEUMOLYSIN O

42
Q

 Also referred to as spreading factor
 It hydrolyses neuraminic acid, an important component of
mucus that covers cells of the respiratory tract and protects
them from bacterial attachment.

A

NEURAMIDASE

43
Q

Is an autolysin that causes lytic dispersal of pneumolysin and hemolysin

44
Q

 LOBAR PNEUMONIA

 Most common bacterial pneumonia

A

Streptococcus pneumoniae

45
Q 
into the chamber of the
middle ear by way of the
eustachian tube and cause
middle ear infection called
otitis media.
A

OTITIS MEDIA

46
Q 
into the chamber of the
middle ear by way of the
eustachian tube and
cause middle ear infection
called otitis media.
47
Q

Adult immunocompromised host

A

MENINGITIS

48
Q

 Alpha hemolytic

 Normal flora of oral cavity

A

VIRDANS STREPTOCOCCI

49
Q 
 Forms dextran from sucrose
 Sticky, mucoid material
 Dental plaque
 Acid production
 Destroys the enamel
50
Q

Via dental procedure

A

ENDOCARDITIS

[7] Gram-positive and Gram-negative Cocci (2 decks)

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