28: Francisella tularensis

Question 1

Originally classified as

Answer 1

Pasteurella spp.

Question 2

Environment

Answer 2

Obligate aerobes

Question 3

Motility

Answer 3

Non-motile

Question 4

Growth Requirement

Answer 4

Fastidious
Requires cysteine to blood agar

Question 5

MacConkey agar

Answer 5

Does not grow

Question 6

Spp according to it’s pathogenicity

Answer 6

subsp. tularensis (type A)
sbsp. holoarctica (type B)
sbsp. mediasiatica

Question 7

Tiny, poorly staining, coccobacilliary

Answer 7

Tiny, poorly staining, coccobacilliary

Question 8

Habitat

Answer 8

Mud, water, contaminated carcasses

Question 9

Associated animal of holoarctica

Answer 9

Aquatic

Question 10

Associated animals with tularensis

Answer 10

Terrestrial animals

Question 11

Main vector ticks

Answer 11

Dermacentor variabilis
D. andersoni
Amblyomma americanum

Question 12

North America vectors

Answer 12

Ticks and deer fly (Chrysops- discalis)

Question 13

Constant findings common lesions

Answer 13

Lymphadenitis
Septecaemia

Question 14

Largely confined to North America

Answer 14

sbsp. tularensis type A

Question 15

Eurasia and North America

Answer 15

sbsp. holoarctica less virulent type B strain

Question 16

Asia

Answer 16

sbsp. mediasiatica (same virulence of holoarctica)

Question 17

Reservoir of sbsp. tularensis

Answer 17

Lagomorphs, rodents, galliform birds, ticks

Question 18

Reservoir of sbsp. holoarctica

Answer 18

Water, mud, aquatic animals, protozoa

Question 19

Citrulline ureidase activity
sbsp. tularemia
sbsp. holoarctica

Answer 19

(+)
(-)

Question 20

Acid from glucose
sbsp. tularemia
sbsp. holoarctica

Answer 20

(+)
(-)