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Ticks and Rickettsial Disease: Anaplasmataceae in SA - Coggle Diagram
Ticks and Rickettsial Disease: Anaplasmataceae in SA
Anaplasmataceae
spp of vet importants
features
gram -, stain poorly
obligate intracellular
form morulae
no peptidoglycan
challenging to culture
infects
leukocytes
erythrocytes
platelets
req arthropod vector
Anaplasma
canine granulocytic anaplasmosis
Anaplasma phagocytophilum
infects neutrophils
morulae indistinguishable form
E. ewingii
worldwide distriution
zoonotic
summer dz
clinical signs
splenomegaly
fever
thrombocytopenia
lameness
lymphadenopathy
Erlichia
canine monocytic ehrlichiosis
acute
8-20d incubation
1-4w long
organism replicates in reticuloendothelial tissue
spleen
LNs
clinical signs
platelet dysfxn
thrombocytopenia
may recover in 2-4w
subclinical
months to years
E. canis
sequestered to spleen
Ag variation evades host
recover or become chronic
chronic
uncommon
severe
clinical signs
pancytopenia
bone marrow hypoplasia
marked granular lymphocytosis
monoclonal cammopathy
misdiagnosis of leukemia or plasmacytoma
death
hemorrhage
secondary infection
clinical signs
lethargy
inappetence
fever
lameness
weight loss
bleeding
epitaxis
petechiae/ecchymoses
neuro signs
hyphema
dyspnea
can occur anywhere
diagnosis
thrombocytopenia
hypoalbumenia
hyperglobulinemia
usually polyclonal
increased clotting signs
pancytopenia in chronic cases
tests
IFA :first_place_medal:
Idexx SNAP 4Dx
immunoblot
must be 21d post infection
can differentiate fr/
E. canis
and
E. ewingii
PCR
best in acute phase
morulae on CBC
probably of death
severe leukopenia
severe anemia
increase aPTT
increased risk breeds
German Shepherds
Doberman Pinschers
canine granulocytic ehrlichiosis
Rickettsia rickettsia
Rocky Mountain Spotted Fever
infects endothelial cells
clinical signs
vasculitis
uveitis
petechiae
diagnosis
culture
PCR
tissue IFA
serology
public health
REPORTABLE
dogs acts as sentinels
needlesticks
transovarial transmission
life cycle
tick takes 24-28h blood meal
live in tick salivary glands
1-2w
morula identifiable
dense core cells form to release into the body