PROTEUS

Question 1

There are only 4 species of Proteus. What specie is of great veterinary importance and is opportunistic pathogen?

Answer 1

P. mirabilis

Question 2

Describe the morphology and staining reactions of Proteus species.

Answer 2

• Straight, gram-negative rods, 0.5 um in width by 1.0 to 3.o um in length
• Many peritrichous flagella

Question 3

Describe the cultural and biochemical features of Proteus species.

Answer 3

Swarming growth on agar media which forms a uniform film over the surface

Question 4

Proteus species produce what enzymes?

Answer 4

1. Urease
2. Phenylalanine deaminase
3. Hydrogen sulfide

Question 5

What carbohydrates or sugars can Proteus species ferment?

Answer 5

1. Glucose
2. Xylose

Question 6

Between P. vulgaris and P. mirabilis, which produces indole?

Answer 6

P. vulgaris

Question 7

Swarming growth of Proteus species on medium can be prevented by addition of ?

Answer 7

1. 8 mg/ml sulfadiazine to the medium
2. Use of 6% agar

Question 8

What are the natural habitats of Proteus spp.?

Answer 8

1. Widely distributed in nature
2. Feces of animals esp. dogs and hogs

Question 9

Proteus spp. are associated with what clinical signs/diseases?

Answer 9

1. Diarrhea in young animals
2. Otitis externa (P. mirabilis) in dogs
3. UTI in spayed bitches

Question 10

Proteus species can spoil meat due to ?

Answer 10

Production of proteases (preferably low temp.)

Question 11

P. mirabilis is generally sensitive to what antibiotics?

Answer 11

1. Ampicillin
2. Cephalosporins
3. Chloramphenicol
4. Kanamycin
5. Penicillins
6. Streptomycin

Question 12

P. vulgaris is often resistant to what antibiotics?

Answer 12

1. Penicillins
2. Cephalsporins

Question 13

Both P. mirabilis and P. vulgaris are naturally resistant to what antibiotics?

Answer 13

1. Bacitracin
2. Colistin
3. Polymyxin B

Question 14

Since many strains carry plasmid-encoded resistance to tetracycline and other antibiotics, _______ _______ is advisable.

Answer 14

susceptibility testing