Rickettsial Parasites Flashcards

1
Q

Rickettsial Parasites

A

A group of obligate intracellular gram-negative bacteria

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2
Q

What are three examples of Rickettsial parasites?

A

Rickettsia rickettsii
Anaplasma spp
Ehrlichia spp

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3
Q

How are Rickettsial species transmitted?

A

Arthropod or helminth vectors

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4
Q

What are the rickettsial bacteria that spread Rocky Mountain Spotted fever?

A

Rickettsia rickettsii

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5
Q

What are the hosts of Rocky Mountain Spotted Fever?

A

Dogs and humans

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6
Q

What are the intermediate hosts of Rocky Mountain Spotted Fever?

A

Dermacentor spp
Amblyomma spp
Rhipicephalus sanguineus

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7
Q

Can Rocky Mountain Spotted Fever be fatal to humans?

A

Yes. It must be transmitted through the tick

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8
Q

What is the organism that spreads Infectious Canine Cyclic Thrombocytopenia?

A

Anaplasma platys

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9
Q

Where are Anaplasma platys found?

A

The platelets of dogs

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10
Q

What is the intermediate host of Infectious Canine Cyclic Thrombocytopenia?

A

Rhipicephalus sanguineus (Brown dog Tick)

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11
Q

What Rickettsial organism causes Canine Monocytic Ehrlichiosis?

A

Ehrlichia canis

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12
Q

Where is Ehrlichia canis found?

A

The mononuclear cells of canids worldwide

Monocytes and lymphocytes

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13
Q

What is the intermediate host of Ehrlichia canis?

A
Rhipicephalus sanguineus (Brown dog Tick)
Amblyomma americanum (Lone Star Tick)
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14
Q

What Rickettsial organism causes human monocytic ehrlichiosis?

A

Ehrlichia chaffeensis

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15
Q

Where can Ehrlichia chaffeensis be found?

A

The monocytic cells of dogs, humans and deer

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16
Q

What is the intermediate host of Ehrlichia chaffeensis?

A
Amblyomma americanum (Lone Star Tick)
Dermacentor variabilis (Amercian Dog Tick)
17
Q

What Rickettsial organism causes Canine Granulocytic Ehrlichiosis?

A

Ehrlichia ewingii

18
Q

Where is Ehrlichia ewingii found?

A

the granulocytes of dogs and humans in the U.S

19
Q

What is Ehrlichia ewingii transmitted by?

A

Ambylomma americanum

20
Q

What organisms/disease are tested for on a 4Dx

A

Heartworm
Lyme Disease
Ehrlichia organisms
Anaplasma organisms