Enteric Gram -ve Bacteria Part III

Question 1

2 most important edwardsiella species

Answer 1

E. Tarda & E. Ictari

Question 2

Type of fish affected by each type of edwardsiella

Answer 2

• E. Tarda: affects warm water fish and eels
• E. Icturi: affects catfish

Question 3

Lesions E. Tarda causes

Answer 3

• Skin sores and ulcers (warm water fish)

Question 4

Diseases E. Icturi causes

Answer 4

Red disease in eels

Question 5

Clinical signs of an edwardsiella infection

Answer 5

• fish hanging vertically @ pond surface and spinning

Question 6

Prevention of edwardsiella in freshwater fish

Answer 6

• remove dead fish
• control aquatic birds
• use feed containing oxytetracycline and trimethoprim

Question 7

Cellular structure responsible for motility of the proteus species

Answer 7

Swarmer cells w/ peritichious flagella

Question 8

Significance of rapid urease activity

Answer 8

Differentiates proteus from other organisms bc they use urease as a virulence factor

Question 9

The hallmark of a proteus infection is

Answer 9

Urolithiasis

Question 10

How is urinary canaliculi formed in K9s with cystitis that turned into pyelonephritis

Answer 10

Urinary canaliculi protect the bacteria from the host’s immune response and antimicrobials bc they’re sequestered in the urolith and continue to grow