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Bacteriology & Mycology > Lesson 2a; staphylococcus species > Flashcards

Lesson 2a; staphylococcus species Flashcards

1
Q

in characteristic ‘bunches of grapes’ formations

A

STAPHYLOCOCCI

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2
Q

staphylococcus a. in cattle cause what?

A

mastitis

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3
Q

s. hyicus in cattle cause what?

A
  1. mastitis
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4
Q

s. aureus subsp. anaerobius in sheep causes what?

A

lymphadenitis

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5
Q

pyogenic characteristics causes what?

A

suppurative lesions

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6
Q

staphylococcal cell wall protein, which binds to this 2 ________ facilitate bacterial attachments to tissues

A

fibronectin & fibrinogen

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7
Q

what are the 3 structural features that interefere with opsonization & subsequent phagocytosis

A
  1. polysaccharide
  2. teichoic acids
  3. protein a
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8
Q

_____ this production aids in survival within phagocytosis.

A

catalase production

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9
Q

_____ has a role in shielding the organism from phagocytic cells

A

coagulase

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10
Q

what are the 2 exoenzymes that promote tissue invasion

A

kinases & hyaluronidase

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11
Q

staphylococcal disease of importance in domestic animals include 5 diseases, what are those? remember: pymatiboex

A
  1. pyoderma
  2. mastitis
  3. tick pyaemia
  4. bortryomycosis
  5. exudative epidermitis
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12
Q

an s. aureus disease, most often causes subclinical infection; virulence factor is alpha toxin that result to tissue necrosis & can be life threatening. What type of disease has this clinical infections?

A

BOVINE STAPHYLOCOCCAL MASTITIS

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13
Q

what is the diagnosis & treatment of anaplasma phagocytophilum ?

A

dx. Bacterial confirmations
tx. tatracyclines & tick control

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14
Q

s. aureus in horses; a chronic, suppurative granulomatous that occur within a few weeks after castration due to infection of the stump of the spermatic cord; can also occur in mammary tissues of sows. What kind of disease is this.

A

Botryomycosis

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15
Q

dogs with wound infections, surgical site infections, pyoderma, otitis & urinary tract infections are most commonly reported; common cause of nasocomial infection in vet hospitals.

A

Methicillin-resistant staphylococcal infections in animals

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16
Q

In lambs they carry S. aureus in what location of their body?

A
  1. Skin
  2. Nasal mucosa
  3. Infection occurs through minor skin trauma
17
Q

what are the 2 microorganisms that can cause tick pyaemia:

A
  1. Ixodes ricinus
  2. Anaplasma phagocytophilum
18
Q

is a vector for the rickettsial agent of tick-borne fever

A

Ixodes ricinus

19
Q

this can cause immuno suppression in lambs & may predispose to staphylococcal infection.

A

Anaplasma phagocytophilum

20
Q

Tick pyaemia is characterized by either :

A
  1. septicaemia
  2. rapid death
  3. localized abscess
21
Q

what is the diagnosis used in tick pyaemia?

A

Bacterial confirmations

22
Q

what can be the treatment for tick pyaemia?

A
  1. Tetracyclines
  2. Tick control
23
Q

S. hyicus occurs in sucklers & weaned pig, it’s highly contagious, & can be isolated from the vaginal mucosa & skin of healthy sows.

A

Exudative epidermitis (Greasy pig disease)

24
Q

S. hyicus of exudative epidermitis enter to this location:

A

Skin of young pigs through minor abrasions as bite wounds

25
Q

Exudative dermatitis can be characterized by:

A
  1. Greasy exudate
  2. Exfoliation
  3. Exudation on skin.
26
Q

is the major virulence factor of exudative epidermitis as injection of this toxin into the skin of young pigs produces exfoliation?

A

Exfoliative toxin

27
Q

2 dx of exudative epidermitis

A
  1. Isolation
  2. identification of bacteria from dermal lesions
28
Q

tx of S. hyicus in exudative epidermitis

A

Antibacterial therapy

29
Q

what are the lesions of staphylococcus species:

A
  1. Skin scrapping
  2. Swab sample
30
Q

what is the exudates in staphylococcus species:

A
  1. Mastitis milk
31
Q

What can be used in the demonstration of bacteria:

A
  1. Gram staining
  2. Culture on blood agar
  3. Selective blood agar
  4. MacConkey agar
32
Q

6 identification criteria use in staphylococcus species;

A
  1. Colonial characteristics
  2. Presence or Absence of haemolysis
  3. Absence of growth on MacConkey agar
  4. Catalase production
  5. Coagulase production
  6. Biochemical profile
33
Q

molecular typing use here is ?

A

PCR procedures

34
Q

this 2 differs in all Staphylococcus species because they are anaerobic & catalase-negative

A
  1. S. aureus subsp. anaerobius
  2. S. saccharolyticus
35
Q

Colonies of this 2 produce double haemolysis:

A
  1. S. aureus
  2. S. pseudointermedius
36
Q

2 exotoxins lyse host cell membranes.

A
  1. haemolysis
  2. leukocidin

Bacteriology & Mycology (17 decks)

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