74.Genus Borrelia.

Question 1

Borrelia Habitat?

Answer 1

Habitat: • infected animals • rodents, arthropods • natural focal infection • mainly in tropical and subtropical countries

Question 2

Borrelia Morphology?

Answer 2

Morphology: • 3-20 µm, 15-20 periplasmic flagella, • irregular shape

Question 3

Borrelia Species?

Answer 3

Species

• B. anserina - avian-borreliosis (avian spirochaetosis)
• B. theileri - horse, cattle, borreliosis, (vectors ticks), tropics
• B. burgdorferi, B. afzelii, B. garinii - Lyme-borreliosis • B. recurrentis, B. hispanica, B. caucasica: -human tick-born relapsing fever

Question 4

Borrelia anseria?

Answer 4

B. anserina:

1. Staining: • fuchsin, Giemsa, • unstained
2. Culture: • difficult culture • fastidious (protein, haemoglobin), • embryonated egg
3. Resistance: • low
4. Pathogenicity: • avian borreliosis (vectors: ticks, acari)

Question 5

B. burgdorferi, B. afzelii, B. garinii?

Answer 5

B. burgdorferi, B. afzelii, B. garinii:

1. Staining: • Giemsa, • unstained
2. Culture: • difficult culture • fastidious
3. Pathogenicity: • natural hosts: small rodents, • Lyme disease: humans, dogs, horse, cattle