Page 526 - The Veterinary Laboratory and Field Manual 3rd Edition

Arthropod vectors and arthropod-borne diseases 463

Pathogen Tick species distribution Vertebrate hosts diagnostic methods
Rickettsia conorii Hyalomma Africa Two hosts
truncatum Small rodents and
other mammals
(immature lifestages)
Wild and domestic
ungulates, equines
(adults)
Rickettsia parkeri Amblyomma North America Three hosts
maculatum
Rickettsia africae Amblyomma tropics, Africa, Three hosts
variegatum Caribbean Small mammals,
birds, reptiles (larvae,
nymphs)
Large ruminants and
carnivores (adults)
Rickettsia africae Amblyomma Africa Three hosts
hebraeum Small mammals,
birds, reptiles (larvae,
nymphs)
Large ruminants
(adults)
Ehrlichia
Ehrlichia canis R. sanguineus worldwide Three hosts Serology (IFT)
Dog, wild carnivores, Buffy coat smear
human (adults) (Monocytes in Giemsa
/ Wright / Dif-Quick
stain)
PCR, qPCR (e.g. 16S)
Ehrlichia Amblyomma North America Dog
chaffeensis americanum
Ehrichia ewingii
Heartwater Amblyomma tropics, Africa, Three hosts Cerebral cortex /
(Ehrlichia variegatum Caribbean Small mammals, cerebellum cell smears
ruminantium) birds, reptiles (larvae, (Giemsa stain,
nymphs) presence in endothelial
Large ruminants and cells)
carnivores (adults) Cell culture from whole
blood (endothelial
cells)
PCR
Serology (ELISA, IFT)
Heartwater Amblyomma Africa Three hosts
(Ehrlichia hebraeum Small mammals,
ruminantium) birds, reptiles (larvae,
nymphs)
Large ruminants
(adults)

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