Rickettsia, Erlichia, Anaplasma, Neorickettsia

Question 1

Rickettsia, Ehrlichia, Anaplasma, and Neorickettsia are all what Type of pathogen

Answer 1

Obligate intracellular pathogens

Question 2

Rickettsia, Ehrlichia, Anaplasma, and Neorickettsia are distinguished apart how

Answer 2

Cell trophism- preference for certain cell type

Question 3

Rickettsia, Ehrlichia, Anaplasma, and Neorickettsia Do not grow in what

Answer 3

Cell media

Question 4

Rickettsia rickettsii causes what

Answer 4

Rocky Mountain spotted fever

Question 5

Rickettsia rickettsii vector

Answer 5

Tick

Question 6

Rickettsia rickettsii affects what

Answer 6

Dogs and humans

Question 7

Rickettsia rickettsii infects what cells and causes what

Answer 7

Endothelial cells of arteries and has phospholipase to damage endothelial cells and causes vasculitis

Question 8

Rickettsia rickettsii clinical signs

Answer 8

Rash with small hemorrhages, and renal disease and neurological signs because of encephalitis and spinal cord disease

Question 9

Rickettsia rickettsii diagnosis

Answer 9

Serological tests

Question 10

Rickettsia rickettsii treatment and prevention

Answer 10

Antibiotics, tick control, no vaccine

Question 11

Ehrlichia canis causes what

Answer 11

Monocytotropic ehrlichiosis

Question 12

Ehrlichia canis are found where

Answer 12

Dog monocytes and replicative form is morulae which is a cluster of organisms in the monocyte

Question 13

Ehrlichia canis Transmission

Answer 13

Ticks and wildlife (foxes, coyote) is a reservoir

Question 14

Ehrlichia canis Clinical signs

Answer 14

Pancytopenia- low WBC, low RBC, low platelets and lymphadenopathy, edema, weigh loss, fever, hemorrhages, meningitis

Question 15

Ehrlichia canis Diagnosis

Answer 15

Snap test and clinical signs

Snap test can be positive but be totally normal

Question 16

Ehrlichia canis Treatment and prevention

Answer 16

Antibiotics, tick control, no vaccine

Question 17

Ehrlichia ruminantium infects what

Answer 17

Endothelial cells

Question 18

Ehrlichia ruminantium causes what disease

Answer 18

Heartwater

Question 19

Ehrlichia ruminantium Transmission

Answer 19

Ticks

Question 20

Ehrlichia ruminantium In US?

Answer 20

No but we have the ticks and it is in Caribbean

Question 21

Ehrlichia ruminantium clinical signs

Answer 21

Vasculitis caused by endothelial cell infection, causes fluid around pericardium and other edema, can also cause neurological signs Because of brain edema, causes high fever, coughing, weak, respiratory distress, *sudden death in ruminants

Question 22

Ehrlichia ruminantium Diagnosis

Answer 22

Usually after death diagnosis, look for morulae

Question 23

Ehrlichia ruminantium Reportable

Answer 23

Yes

Question 24

Ehrlichia ruminantium Prevention

Answer 24

Tick control

Question 25

Anaplasma phagocytophilum transmission

Answer 25

Infected Ixdoes tick vectors

Question 26

Anaplasma phagocytophilum Diseases

Answer 26

Equine Granulocytic Ehrlichiosis and Canine Granulocytotrophic Anaplasmosis

Question 27

Anaplasma phagocytophilum Clinical signs of disease

Answer 27

Fever, lethargy, mild petechial hemorrhages and pancytopenia in dogs and horses

Question 28

Anaplasma phagocytophilum Diagnosis

Answer 28

Clinical signs and snap test or PCR or looking for morale inside neutrophils

Question 29

Anaplasma phagocytophilum Treatment

Answer 29

Antibiotics, tick control, no vaccine

Question 30

Anaplasma marginale causes what in what

Answer 30

Anaplasmosis (anemia) in cattle

Question 31

Anaplasma marginale Infects what

Answer 31

RBCs

Question 32

Anaplasma marginale Transmission

Answer 32

Tick or fly bite or infected blood contaminating a fomite

Question 33

Anaplasma marginale Clinical signs

Answer 33

Fever, lethargy, drop in milk production, pale membranes- ** affect older animals worse, increasing severity of disease with age

Question 34

Anaplasma marginale treatment and prevention

Answer 34

Antibiotics and maybe blood transfusion and in some areas they intentionally expose calves because disease less severe Vaccine available in some places

Question 35

Neorickettsia risticii causes

Answer 35

Potomac horse fever

Question 36

Neorickettsia risticii Transmission

Answer 36

Organisms in flukes that parasitize snails and when water warms the flukes generate immature forms (cercaria) carrying Neorickettsia risticii which pass into the water from the snail Or mayflies can pick up cercaria and contaminate water on close by farms

Question 37

Neorickettsia risticii Disease symptoms

Answer 37

Seasonal- spring and summer | Diarrhea, fever, edema, laminitis, mild colic, and occasionally abortion in mares

Question 38

Neorickettsia risticii Diagnosis

Answer 38

PCR of blood or feces, serology (ELISA)

Question 39

Neorickettsia risticii Treatment and control

Answer 39

Antibiotics, fluids, vaccine available but immunity short-lived