Rickettsiceae Flashcards Preview

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Flashcards in Rickettsiceae Deck (11)
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1
Q

Habitat

A

OBLIGATE CELL PARASITES
Arthropod vectors
Small rodents

2
Q

Morphology

A

Non motile, small coccoid rods

3
Q

Staining

A

Difficult , Giemsa , köster , stamp

4
Q

Culture

A

Living cells, embryonated eggs , cell cultures , animals

Cannot produce NAD , CoA itself

5
Q

Genera

A

Rickettsia , coxiella : all cell type
Neorickettsia , Ehrlicha ; lymphoid + endothelial cells
Anaplasma; ON erythrocyte , in lymphoid.

6
Q

Rickettsia

A

Rodents, arthropods
Giemsa
1. R. Prowazekii: epidemic typhus fever (lice) rush (defecation>scratching> blood stream
2. R. Rickettsi: Rocky mountain disease (ticks)
3. Sibirica: North Asian tick brome rickettsiosis

7
Q

Coxiella

A

V Good resistance , embryonated egg , not by tick but spores in aerosol
C. Brunetti: cattle,sheep,goat- Q fever- pneumonia , fever, hepatitis, no rash

8
Q

Bartonella

A

Not from rickettsiacaea, but same topic as coxiella
Slightly curved rod, BLOOD agar (3-4w)
B. Henselae: cat scratch disease - ulcer,fever, headache , enlarged LN

9
Q

Ehrlichia

A

Coccoid , CANNOT be cultured in embryonated egg
Tissue culture
RBCs parasite

  1. E. Canis; canine monocytic ehrlichosis (generlized fever)
  2. E. Ruminantium : Ru heartwater
  3. Neorickettsia risticii: potomac horse fever
10
Q

Anaplasma

A

TICK, RUMINANTS , NO cell wall
No possible to culture in VITRO (no cell wall)
RBCs obligatory IC parasite

NON-HAEMOLYTIC ANEMIA
A. Marginale- cattle anaplasmosis
A. Ovis
A. Phagocytophilum - Ru , tickbrone fever

11
Q

Anaplasma

A

TICK, RUMINANTS , NO cell wall
No possible to culture in VITRO (no cell wall)
RBCs obligatory IC parasite

NON-HAEMOLYTIC ANEMIA
A. Marginale- cattle anaplasmosis
A. Ovis
A. Phagocytophilum - Ru , tickbrone fever