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VPH 122 (3rd exam) > Strepto > Flashcards

Strepto Flashcards

1
Q

Strep is catalase ____?

A

NEGATIVE

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2
Q

Can Strep survive outside host?

A

YES, but mostly survives inside

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3
Q

What increases the viability of Strep outside a host?

A

• organic material
• moisture
• low temp

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4
Q

What degree do S. suis persist in egg feces/decomposing carcass and how long?

A

25C for 2 weeks

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5
Q

at what temperature can Strep survive for 6 weeks to few months in feces?

A

4 C

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6
Q

Severe lesions of strep mostly involves tissue of (2) ?

A

brain & heart

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7
Q

Is strep host-specific?

A

NO

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8
Q

Strep is categorized based on (2)

A
  1. Hemolytic property
  2. Antigenic cell wall polysaccharide (Lancefield)
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9
Q

(3) Strep that is BETA hemolytic

[ pae ]

A

S.
pyogenes
agalactiae
equi

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10
Q

Strep that is ALPHA (incomplete) hemolytic?

A

S. suis

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11
Q

Because Strep is an “opportunistic” parasite, these (2) are at risk:

A
  1. immunocompromised
  2. in current chemotherapy
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12
Q

Strep is a sporadic zoonotic infection, what does this mean?

A

has no trend (minsan meron, minsan wala)

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13
Q

(3) Strep that causes reverse zoonoses?

[ ppa ]

A

S. pyogenes
S. pneumoniae
S. agalactiae

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14
Q

strep that commonly affects CHILDREN

• Strep throat
• Scarlet fever
• Impetigo

A

S. pyogenes (A)

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15
Q

Strep that is transmitted vertically (in newborne & adults)

A

S. agalactiae (B)

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16
Q

Strep that is not common in man?

A

S. equi subsp. equi (C)

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17
Q

(2) Strep that causes toxic shock-like syndrome in man?

[ zs ]

A

S. equi subsp. zooepidemicus (C)
S. suis (D)

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18
Q

An emerging zoonotic disease (Strep spp) in China that is transmitted thru small skin wounds?

A

S. suis

19
Q

A “child” is in a “low” temperature country.

Clinical signs present:
• whitish coat
• swollen tongue (strawberry-like)
• red rash

A

Scarlet fever

20
Q

A man has:
• red, itchy sores
• crusty yellow scabs
• 10 days after its contact with a fluid sore on skin

It is said to may also be caused by Staphylococcus aureus.

A

Impetigo

21
Q

A man has big cut on his hands that a bacteria extended into deeper layers of its skin, changing its color.

• oozing pus
• ulcer
• dizzyness
• fatigue

A

Necrotizing fascilitis

22
Q

A man has pitter or blisters on legs and feet. He has cuts and has been recently exposed to respiratory droplets.

A

Cellulitis (St. Anthony’s Fire)

23
Q

A >65 year old woman (OLD) has skin problems in vagina where the pathogen entered & has chronic illness involving pharynx

• hypotension
• tachycardia
• tachypnea
• organ failure

A

Streptococcal Toxic Shock Syndrome

24
Q

A child has pharyngitis but it was untreated, after 2-3 weeks, it lead to Rheumatoid Heart disease. What does the child have?

A leading cause of streptococcal death in childen (1987) that affected 15M people globally.

A

Acute Rheumatic Fever

25
Q

possible sequela of Strep Throat?

A

Scarlet fever

26
Q

Strep that is not zoonotic but causes chronic catarrhal mastitis in dairy cow?

A

S. agalactiae (B)

27
Q

This one is zoonotic and causes mastitis in dairy cows.

A

S. pyogenes (A)

28
Q

Most common cause of brain abscess & strangles in horses caused by Strep?

A

S. equi subsp equi (C)

29
Q

Target is the lymph nodes in thorax & abdomen, has long shedding times.

Affects:
• Horses - wound infection & 2nd respiratory infection
• Cows - mastitis
• guinea pigs - cervical lymphadenitis

A

S. equi subsp zooepidemicus (C)

30
Q

Target is YOUNG pigs

• polyarthritis
• peracute meningitis
• septicemia

A

S. suis (D)

31
Q

Strangles has ____ morbidty but _____ mortality in horses.

A

high morbidity
low mortality

32
Q

what LN is involved in Strangles?

A

retropharyngeal LN

33
Q

where abscesses are metastasized (LN — abdomen, thorax)

A

Metastatic strangles / Bastard strangles

34
Q

Can Strep be transmitted thru fomites?

A

YES

35
Q

Used as definitive diagnosis for Strep?
To determine hemolysis

A

bacterial culture

36
Q

Strep that has VERY fast progression

A

S. pyogenes

37
Q

In a conventional multiplex PCR, many lines indicate ____?

A

contamination

38
Q

(3) Antibiotics against strep?

A
  1. Beta-lactams
    • cephalosporins
    • penicillin
  2. Macrolides
  3. Quinolones
39
Q

Wearing PPE is important for strep because it is transmitted ___ & ___

A

airborne
direct contact

40
Q

How to kill strep in a meat?

Cook for more than ________

A

Cook for more than 70C for 10 mins

41
Q

There is a vaccine for horses with strangles.

It does not decrease rate of transmission but causes milder lesions only.

Give the name & route

A

PINNACLE, intra-nasally

42
Q

How long should you quarantine a horse that recently travelled?

How many negative swab?
(interval of 4-7 days)

A

1 month ; 3 negative swab

43
Q

also called “flesh-eating disease”

A

Necrotizing fascilitis

VPH 122 (3rd exam) (26 decks)

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