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Microbiology Module 1 '15 - '16 > Streptococcacease Part II > Flashcards

Streptococcacease Part II Flashcards

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Biology 101 flashcards
1
Q

What is the microscopic shape/gram stain of Streptococcus genera?

A

Gram Pos cocci, Pairs and chains, football or lancet shaped

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2
Q

Describe a staphylococcus plate

A

Opaque

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3
Q

Describe a streptococcus plate

A

Transparent, not as opaque

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4
Q

What is group A bacteria? How does it get its name?

A

Streptococcus pyogenes, pus forming

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5
Q

What is group B bacteria?

A

Streptococcus agalactoae

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6
Q

What are characteristics of Streptococcus pyogenes?

A

Group A, M protein, Emm gene sequencing

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7
Q

What are disease with streptococcus pyogenes?

A

Strep throat, scarlet fever, necrotizing faciitis (flesh eating bacteria)

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8
Q

What is the cause of streptococcal toxic shock syndrome?

A

Pyrogenic exotoxin

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9
Q

What are two diseases post streptococcal infection?

A

acute glomerulonephritis and Rheumatic Fever

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10
Q

What is the cause of acute glomerulonephritis

A

Not infection of the kidney, ag-Ab complexes

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11
Q

What is the cause of Rheumatic Fever?

A

After pharyngitis, damage to heart valves, not an infection of the heart

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12
Q

Why is M protein virulent?

A

Resistant to phagocytosis

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13
Q

Why is Pyrogentic toxin virulent?

A

Rash of scarlet fever

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14
Q

Why is streptokinase/fibrinolysin virulent?

A

Spreading infections

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15
Q

Why is hyalronidase virulent?

A

Spreading infections

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16
Q

What are other exotoxins virulent?

A

Fever, shock, tissue damage

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17
Q

What strep are throat screens run on, what about the others? Why?

A

Only run on group A as these are the only ones that can lead to other diseases, group B are not treated

18
Q

What incubator is SBA throat screen placed in. WHY?

A

anaerobically, due to streptolysin O (oxygen labile)

19
Q

What is done when a rapid test screen is pos? when it is neg?

A

Pos is conclusive, neg, you have a culture preformed because it COULD still be positive. The ag detection is only 85% sensitive

20
Q

What is the treatment for streptococcus group A?

A

Penicillin

21
Q

What are the characteristic of streptococcus agalactiae?

A

Lancefield group B, beta hemolytic, large colonies but smaller zone of hemolysis compared to A

22
Q

When are group B streptococcus cultures preformed, in what media?

A

35-37 gestation in LIM broth

23
Q

What is the most common infection for babies

A

Group B strep

24
Q

What is the most common bacterial cause of pneumonia?

A

streptococcus pneumoniae

25
Q

What are the gram stain and plate characteristics of streptococcus pneumoniae?

A

Diplococci, FOOTBALL/LANCET SHAPPED, Alpha hemolytic and autolysis (dipped)

26
Q

What are the two most common causes of viridans streptococci?

A

subacute endocarditis and oral infections

27
Q

How are group D and not group D alpha streptococci differentiated?

A

Bile esculin

28
Q

What condition goes along with positive septicemia and streptococcus bovis?

A

colon cancer

29
Q

What are the two most common species of enterococcus? which one is more resisitant?

A

E. Faecalis and E. faecium, faecium is more resistance

30
Q

What are the causing agents of culture negative endocarditis?

A

Abiotrophia

31
Q

What is characteristic of a plate with satellite colonies?

A

Abiotrophia

32
Q

What bacteria causes a staph looking gram stain and a strep looking plate?

A

Aerococcus

33
Q

What species are lactic acid bacteria?

A

Leuconostoc and Pediococcus

34
Q

What are characteristics of Leuconostoc and Pediococcus

A

Lactic acid from glucose and resistant to Vancomycin

35
Q

Beta, PYR+, Bacitracin susceptible

A

Group A

36
Q

Beta, CAMP+, NaHippurate+, NaCl+

A

Group B

37
Q

Usually Alpha or Gamma, Bile Esculin +, NaCl- and PYR-

A

Group D

38
Q

ALPHA, Optochin susceptible, bile solubility positive and quelling test positive

A

Streptococcus pneumoniae

39
Q

Alpha or Gamma, Bile esculin, NaCl and PYR all +

A

Enterococcus spp.

40
Q

Neg for all tests and Alpha

A

Alpha streptococcus not group D

41
Q

Neg for all tests and Beta

A

Beta streptococcus not group A, B or D

42
Q

Diplococci, FOOTBALL/LANCET SHAPPED, Alpha hemolytic and autolysis (dipped)

A

streptococcus pneumoniae

Microbiology Module 1 '15 - '16 (9 decks)

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