2001-Mon Dec 05 11:44:19 MST 2016
Vetstreet. All rights reserved.
Vetstreet does not provide medical advice, diagnosis, or treatment. See Additional Information ›
Ticks are trouble! We all know that they spread the bacteria that cause
Lyme disease, but another tick-borne disease that is steadily increasing is ehrlichiosis. Once limited to western Texas, Oklahoma and Missouri, the incidence of ehrlichiosis is expected to rise in those areas, as well as in southern California and the southeastern United States, according to the Companion Animal Parasite Council.
Dogs with ehrlichiosis can develop an acute infection that starts with fever, appetite loss and lethargy. Two to four weeks after experiencing the bite of an infected
tick, a subclinical infection can set in, causing thrombocytopenia. That $5 word means that the dog doesn’t have enough platelets in his blood. When that happens, he can experience bleeding into body tissues (known as petechiae) and bruising. His blood may clot more slowly than normal after an injury. Bone marrow suppression is often a result of chronic Ehrlichia spp. (the "spp." refers to all species of this type of bacteria) infection. It can appear months to years after a tick bite. Certain breeds — in particular,
German Shepherds — tend to be predisposed to severe forms of ehrlichiosis.
Cats with the disease may show similar signs. Other signs seen in cats and dogs include weight loss, joint pain,
vomiting and diarrhea.
tick species are known to spread the organism that causes ehrlichiosis. The brown dog tick (Rhipicephalus sanguineus), found throughout the United States, is the primary culprit, but the American dog tick (Dermacentor variabilis) and the lone star tick (Amblyomma americanum) can also transmit the bacteria that cause disease. You might think lone star ticks would be limited to the Lone Star State (Texas, of course), but they are found up from the southeastern U.S. and Texas through the Mid-Atlantic Seaboard all the way to New England. American dog ticks reside east of the Rockies, mainly in areas such as grassy fields, walkways and trails. They can survive for two or more years without a host.
cats) become infected with Ehrlichia spp. when
infected ticks feed on them, injecting the bacteria into their blood by deeply burying their mouthparts into the skin. Nasty!
It can take as little as three to six hours for ticks to transmit the bacterial invaders. Once the bacteria enter the blood cells, they thrive, multiply and spread throughout the body. The disease is diagnosed based on a history of tick exposure, presence of signs, a platelet count and a positive blood test result for the bacteria that cause the disease: Ehrlichia canis (the primary cause in dogs), Ehrlichia ewingii
(seen in dogs and humans) and Ehrlichia chaffeensis (the primary cause in humans). Ehrlichiosis isn’t always easy to diagnose, because it can take time for antibodies to develop, but response to treatment with doxycycline is a good clue that your veterinarian has found the cause of your dog’s symptoms.
Like this article? Have a point of view to share? Let us know!
Take our breed quiz to find your next pet.
Get all the best pet news and information sent right to your inbox!
Thank you for subscribing!
We combed through 505,270 kitten
names to determine the hottest male
and female monikers of the year.
We scoured our database of 1.1 million
dogs to find out which male and female
monikers reigned supreme this past…
Christmas trees, fatty foods and other
seasonal items may bring cheer to your
home, but they'll cause harm to your…
Dr. Sarah Wooten takes a closer look at
this curious sleeping habit and what it has
to do with canines’ ancestry.
The Kromfohrlander is said to be
descended from a mixed-breed dog
who was a mascot for American troops.
Check out our collection of more than 250 videos about pet training, animal behavior, dog and cat breeds and more.
Wonder which dog or cat best fits your lifestyle? Our new tool will narrow down more than 300 breeds for you.
If the video doesn't start playing momentarily,
please install the latest version of Flash.
Thank you for subscribing.