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Bacteriology Exam 1 > Streptococcus > Flashcards

Flashcards in Streptococcus Deck (39):
1

What is the shape of Streptococcus?

Cocci in chains

2

What is the oxygen requirement of Strep.?

Facultative anaerobes

3

What is the mode of locomotion of Strep?

None

4

Does Strep form spores

No

5

What is the catalase state of Strep

Negative

6

Where is Strep commensal?

Mucous membranes

7

Are Strep stable in the environment?

No

8

Virulence factors that assist with Strep. invasion

Streptokinase and hyaluronidase

9

Virulence factors that assist with adhesion

Protein F

10

Virulence factors that assist with evasion

M protein, Hyaluronan, streptolysins

11

Virulence factors that are toxins

Strep/ pyrogenic exotoxins, lipoteichoic acid

12

Strep mode of entry

Upper resp. tract via purulent exudates or discharging abscesses

13

Streptococcus equi subsp. equi

Strangles/Equine distemper

14

Highly contagious febrile disease involving the upper respiratory tract with abscessation of regional lymph nodes

Strangles

15

Which Strep species is NOT commensal?

S. equi equi

16

Which lymph nodes are affected by S. equi equi?

Submandibular and retropharangeal

17

Secondary infection to S. equi equi

Guttural pouch empyema

18

How is S. equi equi transmitted from host to host

Nasal shedding

19

Treatment for S. equi equi

Antibiotics are effective before abscess formation

20

What are Strangles vaccines given to pregnant mares trying to accomplish?

Maintain high levels of anti-M protein opsonizing antibodies in foals

21

Is Strangles a notifiable disease

Yes, in many states

22

Cause of significant production loss in the pig industry

S. suis

23

Associated with meningitis, arthritis, septicemia, and bronchopneumonia in pigs

S. suis

24

"Nursery disease"

S. suis

25

Where do pigs naturally carry S. suis?

Tonsillar tissue

26

Which S. suis serotype is the most predominant in the world?

Serotype 2

27

Causes adult meningitis is humans in Asia

S. suis

28

Prevention of S. suis

Good hygiene and husbandry practices

29

Contagious mastitis that colonizes the milk ducts

S. agalactiae

30

Obligate parasite of the mammary gland

S. agalactiae

31

Colonizes the buccal cavity, genitalia, and skin of the mammary glands to cause acute mastitis

S. dysgalactiae

32

Colonizes the skin, tonsils, and vaginal mucosa to cause subclinical mastitis

S. uberis

33

What is normal somatic cell count in cows' milk?

About 10k/mL

34

Opportunistic pathogen of broad range of animals that causes purulent infections

S. equi zooepidemicus

35

Streptococcal toxic shock syndrome and necrotizing fasciitis in dogs and cats (especially kittens and puppies)

S. canis

36

Where is S. canis commensal in dogs and cats?

Skin and mucous membranes

37

Causes mild superficial skin diseases to life-threatening systemic disease

S. pyogenes

38

Called "flesh-eating bacterium"

S. pyogenes

39

Causes rare but serious to deadly infection known as necrotizing fasciitis

S. pyogenes