Non-Spore forming Obligate Anaerobes - Exam 2 Flashcards Preview

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Flashcards in Non-Spore forming Obligate Anaerobes - Exam 2 Deck (19):
1

Which obligate anaerobe produces cytotoxin?

Fusobacterium necrophorum

2

Which obligate anaerobe produces an enterotoxin-like entity?

Bacteroides fragilis 

3

True/False. The immune response plays a major role in resolving the pyonecrotic process involving obligative anaerobes.

False. 

 The immune response plays a MINOR role in resolving the pyonecrotic process involving obligative anaerobes.

4

True/False. Non-spore forming anaerobes are part of the normal flora.

True

5

Which toxin produced by this group of bacteria is inhibitory to polymorphnucleotides?

Succinic acid

6

What is a key aspect to the samples taken for diagnosis of anaerobes?

The samples have a very repugnant odor (same for invasive clostridia)

Due to volatile fatty acid production

7

What increases the chance of bacterial infection with this group?

Very low blood supply and low Osupply

8

Describe the "glove box" that is used to isolate this group of bacteria.

IMPORTANT FOR ISOLATION: reduce O2 in environment 

"glove box" - anaerobic chamber where you place your hands in gloves to be able to manipulate the samples within the chamber

9

How does the general pathogensis for these obligate anaerboes work with faculative bacteria?

Continous synergistic inflammatory response between anaerobes and falcultative anaerobic bacteria 

(capsule, cell wall, toxins, phagocytes)

10

What are the common facultative organisms that are synergistic with anaerobes during infection?

Pasteurella and enterics in dogs/cats

Beta-hemolytic streptococci and enterics in horses

Arcanobacterium pyogenes and enterics in ruminants

**would treat for both anaerobes and facultative organisms**

11

Dichelobacter is gram _____.

Negative

12

Fusobacterium necrophorum is gram ______.

Negative

13

Which anaerobe is a causative agent of bovine liver abcesses?

Fusobacterium necrophorum

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14

Which anaerobes are the caustive agents of foot rot? Which species is susceptible?

Dichelobacter nodsus and Fusobacterium nercrophorum

Contagious infectious dz affecting epidermal portions of food of sheep and goats - causes cripling lameness

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15

Whic anaerobe causes calf diphteria? 

Fusobacterium necrophorum 

**calf diphteria - necrotic pharyngitis or laryngitis

16

Which anaerobe causes necrotic rhinitis of pigs?

Fusobacterium necrophorum

17

Which part of the body would you swab to isolate F. necrophorum?

The oral cavity and gastrointestinal tract of animals

18

Which anaerobe produces leukotoxin and hemagluttinin that facilitates the survival of synergistic bacteria?

F. necrophorum

Synergistic bacteria: D. nodsus and A. pyogenes

19

How would you treat foot rot?

Removal and exposure of diseased tissue - hoof triming with disinfectants or antibiotics (penicillen and streptomycin)