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Bacteriology Exam 1 > Staphylococcus > Flashcards

Flashcards in Staphylococcus Deck (57):
1

What is the shape of Staphoylococcus?

Cocci clusters (grapes)

2

What is the oxygen requirement of Staph?

Facultative anaerobes

3

What is the mode of locomotion of Staph?

None

4

Does Staph form spores?

No

5

What is the catalase state of Staph?

Positive

6

Is Staph a commensal organism?

Yes

7

Where is Staph naturally inhabiting the body?

Skin and mucous membranes (20% in nose)

8

What is the typical infections of a Staph bacteria?

Suppurative infections w/pus-filled lesions

9

Virulence factor that assists in tissue colonization

Adhesions

10

Virulence factor that assists in tissue destruction

Hemolysins, enterotoxins, and toxic shock syndrome toxins

11

Virulence factors that assist in immune evasion

Protein A, leukocidin, coagulase

12

Part of the antibody to which the bacteria binds

Fc

13

How can you tell if a coagulase test is positive?

Clot formation in test tube

14

Which Staph. is coagulase-negative?

CoNS

15

Clinical infections of S. aureus in cattle

Bovine staph. mastitis

16

Clinical infections of S. aureus in sheep and goats

mastitis, tic, pyaemia, dermatitis

17

Clinical infections of S. aureus in horses

Botryomycosis of spermatic cord

18

Clinical infections of S. aureus in poultry

Ulcerative pododermatitis (bumblefoot)

19

Clinical infections of S. aureus in dogs and cats

Suppurative conditions

20

Most common Staph infection in small animals

S. pseudintermedius

21

Clinical infection of S. pseudintermedius in dogs

Pyoderma, otitis externa, endometritis, cystitis

22

Clinical infection of S. pseudintermedius in cats

Various pyogenic conditions

23

Clinical infection of S. hyicus

Greasy pig disease

24

What species does S. hyicus infect

Pigs

25

Contagious mastitis in cattle

Bovine staphylococcal mastitis

26

Consequences of contagious mastitis in cattle

Decreased milk quality and production losses

27

Source of infection of contagious mastitis in cattle

Infected mammary gland of another cow in the herd

28

Host predisposition for contagious mastitis in cattle

Impaired phagocyte function

29

Disease associated with production of toxin that causes vasoconstriction in the udder, venous thrombosis, and local edema

Peracute gangrenous mastitis

30

Severe swelling of affected gland, purulent secretion with clots, extensive fibrosis

Acute mastitis

31

Milk production decreases over time due to prolonged inflammatory response that leads to fibrosis and narrowing of the mammary ducts

Chronic subclinical mastitis

32

Prevention of contagious mastitis

Good hygiene and milking technique

33

Treatment of contagious mastitis

Quarantine of infected cows, cull chronic cows, antimicrobial treatment

34

What antimicrobials can you use to treat contagious mastitis in cattle?f

Penicillinase-resistant Beta-lactams

35

Pus filled granulomas in the skin

Botryomycosis

36

Chronic granulomatous suppurative disorder with formation of micro-abscessation

Botryomycosis

37

Result of post-castration complications in horses

Botryomycosis

38

Treatment of botryomycosis

Long-term antibacterial treatment and repeated surgical removal of affected tissue

39

Prevention of botryomycosis

Hygiene during surgical procedures and proper wound care

40

Local chronic pododermatitis on the foot of all types of birds

Bumblefoot

41

Sometimes leads to staphylococcal arthritis and septicemia in turkeys

Bumblefoot

42

Prevention of bumblefoot

Good husbandry

43

Causes local skin diseases in dogs and cats

S. pseudintermedius

44

S. pseudintermedius is usually a __________ infection associated with parasites, food allergies, or other skin diseases

Secondary

45

Treatment of S. pseudintermedius

Identification and treatment of underlying problems

46

Highly contagious exudative epidermitis in suckling and weaned pigs

Greasy-pig disease

47

How old are pigs affected by S. hyicus?

Up to 3 months old

48

What is the mortality rate of untreated pigs infected with S. hyicus?

90%

49

How can you isolate S. hyicus?

Vaginal mucosa and skin of healthy cows

50

What is the mode of infection of S. hyicus?

Per cutaneous (through minor abrasions)

51

Treatment of S. hyicus

Early systemic antibiotic therapy plus topical treatment

52

Prevention of S. hyicus

Quarantine infected pigs, good

53

What is TSS caused by?

Effect of superantigens entering the bloodstream

54

Causes an exaggerated immune reaction

Superantigens

55

What causes food poisoning?

Enterotoxins

56

Which Staph species produces enterotoxins when it multiplies?

S. aureus

57

Is Staph stable in the environment

Yes