Dog Tested Positive for Anaplasmosis but No Symptoms?

Dog tested positive for anaplasmosis but no symptoms? It usually means past exposure, not illness; a blood count decides if treatment is needed.

See a vet in person today, or an emergency vet tonight, if your dog has a fever, is lethargic or not eating, is limping or has painful joints, or has nosebleeds, unusual bruising or bleeding, or a seizure.

A routine tick-disease screen came back positive, yet your dog is eating, playing and acting like themselves. Here is what that result means, which signs change the answer, why a blood count is usually the next step, and what treatment looks like if your dog does need it.

Dog Tested Positive for Anaplasmosis but No Symptoms: What It Means

The screen your dog had looks for antibodies, the proteins the immune system makes after meeting the bacteria. Antibodies show that exposure happened. On their own, they do not tell your vet whether the bacteria are still active.

Cornell University's College of Veterinary Medicine puts it plainly: "A positive antibody test does not necessarily indicate active infection needing treatment, but rather previous exposure, which can remain detectable for several months."

VCA explains why healthy dogs can test positive: "Dogs living in areas where anaplasmosis or Lyme disease are common are frequently exposed to A. phagocytophilum and may have a positive antibody test result even though they appear healthy."

And according to Cornell, "Many dogs that test positive for anaplasmosis never become ill or require treatment."

So a positive antibody test on its own shows exposure, not necessarily an active infection. A physical exam and a blood count help your vet tell the difference. Ask your vet whether any other testing makes sense for your dog.

Signs That Change the Answer: When to See a Vet Now

A dog who is anaplasma positive with no symptoms is one situation. A dog who starts to look unwell is another, and needs a hands-on exam. Cornell lists these signs of anaplasmosis in dogs:

• Common: fever, decreased appetite, lethargy and dehydration.
• Less often: lameness, vomiting and diarrhea. If your dog is favoring a leg, our guide to dog limping causes and treatment can help you describe it to your vet.
• Rarely: bleeding from the nose, neck pain and seizures.

VCA also lists joint pain. If you notice any of these signs, book an in-person visit today, or go to an emergency vet tonight if it is after hours.

A seizure, a nosebleed that won't stop, collapse or trouble breathing means go to an emergency vet now. Do not wait to see if it passes.

Watch for the signs above, and call your vet if any of them appear. For a broader list of red flags, see our practical checklist for pet emergencies.

The Next Step Is Usually a Blood Count

You might wonder why your veterinarian may recommend an in-person blood count when your dog seems perfectly well. The reason is simple: the antibody screen shows exposure, while a blood count looks for signs that infection is active right now.

According to VCA, your veterinarian "may recommend running additional tests, including a physical examination and a complete blood count (CBC) that may detect signs of active infection like fever, low platelet count, or may detect the organism in the blood."

A CBC checks your dog's blood cells and platelets. It needs a blood draw, so it is always done in person at a clinic.

Both sources are clear about what happens when everything checks out. Cornell: "A patient with a positive antibody test, but no clinical signs or changes in blood work, does not require antibiotic treatment." VCA: "Treatment is generally not recommended for dogs that test positive but have no other signs of infection because the screening tests only indicate exposure to the organism, not an active infection."

Notice the condition in Cornell's sentence: no clinical signs and no changes in blood work. Your vet may still recommend treatment if a blood count shows changes such as a low platelet count, even in a dog who looks healthy. Together with your dog's history and a physical exam, the blood count is usually what settles the question.

If Treatment Is Needed, What It Looks Like

According to Cornell, "Anaplasmosis is commonly treated with the antibiotic doxycycline." Cornell adds that dogs "often start to feel better in 1-2 days, but require treatment for at least two weeks," and that "an extended course of four weeks may be necessary for patients infected with Lyme disease at the same time."

Whether your dog needs any treatment at all is your veterinarian's decision, usually made after an in-person blood count. No antibiotic can be promised from a video visit.

Some dogs keep testing positive after they recover, which can be confusing. VCA explains that a positive result after recovery "does not necessarily mean that the dog still has an active infection, so a second course of antibiotics is generally not recommended simply to obtain a negative blood test."

If your dog was treated before and still tests positive, ask your vet how the new result fits with how your dog is actually doing.

Why a Positive Result Still Matters in a Healthy Dog

A positive result does not mean every dog needs antibiotics, but it is not a result to file away and forget. Cornell advises that "any dog testing positive for anaplasmosis should have their tick control and prevention measures re-evaluated."

There is a second reason to stay attentive. VCA notes that "research has shown that some healthy dogs remain infected with A. phagocytophilum for long periods without becoming ill." That is why it pays to follow your vet's plan, including any blood count they recommend, even when your dog looks great.

For tick control that fits your dog's routine, see our guides to tick prevention and Lyme disease in dogs and cats and preventing and handling tick bites on dogs. Ticks found on your dog can be removed carefully; the tick-bite guide walks you through it.

Lyme and the Other Results on the Same Screen

The in-clinic screen that flagged anaplasmosis often reports several results at once: heartworm plus a few tick-borne diseases, including Lyme. Each line is read separately.

A result on one line does not tell you what the others mean, so ask your vet to walk you through each one. A positive heartworm result needs its own plan with your vet; our page on heartworm testing and why vets require it before prevention explains that test.

If more than one tick-borne result is positive, that deserves a closer look. VCA notes that Lyme disease and anaplasmosis are carried by the same tick species and that "infection with both agents (co-infection) is not uncommon." Cornell's note, mentioned above, that a four-week course may be necessary applies when Lyme infection is present at the same time.

Your vet will help you tell apart a past exposure that may not need antibiotics but does call for a tick-prevention review, and a possible co-infection that needs a closer look.

Can People Catch Anaplasmosis From the Dog?

Not directly. According to Cornell, "Anaplasmosis can infect multiple mammal species but is not directly transmittable between animals, including, but not limited to dogs, cats, horses, cows, sheep, goats and humans." Cuddling your dog or sharing your home does not pass it to you.

The shared risk is the ticks. Your dog was exposed through a tick, and dogs can carry ticks into the house. Treat your dog's positive result as a reminder to check yourself for ticks after time outdoors. If you find a tick on yourself or feel unwell after a tick bite, talk to your doctor.

What a RexVet Online Vet Can and Cannot Do With a Positive Anaplasmosis Result

If your dog has none of the signs in the checklist above, a video visit can help you read the report and plan what comes next. RexVet's veterinarians are licensed in Florida, New York and Virginia. On a video visit, the vet can:

• Read the actual lab report with you, line by line.
• Take a full history, including hiking, travel, past tick bites and current tick prevention.
• Watch your dog walk and check energy and alertness on camera.
• Decide whether a blood count is needed and how soon.
• Review tick prevention for your dog's lifestyle.

What a video visit cannot do matters just as much. A video vet cannot draw blood or run a CBC or follow-up tests. If one is needed, the vet will tell you how soon to get it done in person. If any sign from the checklist appears, go to an in-person or emergency vet first; a video visit is for a dog who is acting normal.

On medication: if the veterinarian decides medication is appropriate, they can prescribe where state rules allow. Under Florida's veterinary telehealth law, prescriptions "based solely on a telehealth evaluation may be issued for... up to 14 days of treatment for other animal drugs" and "may not be renewed without an in-person examination." No controlled substances are prescribed by video. Because treatment usually follows in-person bloodwork and can run at least two weeks, a video visit is not a substitute for that step, and doxycycline is not promised.

If your dog is acting normal and you want a clear answer on whether a blood count is needed and how soon, book a RexVet video visit. A visit is $64.99, vets are available 24/7, and RexVet's veterinarians are licensed in Florida, New York and Virginia, so visits are for pet parents in those states only.

New York and Virginia Notes, and When to Go In Person

Dogs that hike, hunt or run in wooded yards in the Hudson Valley, Long Island, Northern Virginia and the Blue Ridge are commonly exposed to ticks. If you have a dog positive for anaplasmosis in New York or Virginia, the plan is the same as anywhere: read the result, watch for signs, and talk with your vet about a blood count.

Any sign from the checklist above (fever, lethargy, poor appetite, limping or joint pain, bleeding, seizures), or a low platelet count on a blood test, means an in-person plan. For more on how video visits work where you live, see online vet care in New York, online vet care in Virginia and online vet care in Florida.

Frequently Asked Questions

Does a positive anaplasmosis test mean my dog is sick?

Not necessarily. The screen detects antibodies, which show exposure. VCA notes that "dogs may have antibodies to A. phagocytophilum without showing any signs of illness." A physical exam and a blood count help your vet tell whether infection is active.

Should my dog be treated for anaplasmosis if it has no symptoms?

Usually not, once blood work is normal. Cornell says antibiotics are not needed when there are no clinical signs and no changes in blood work. Your vet decides after an exam and a CBC, and may recommend treatment if the blood count shows changes such as a low platelet count.

How long will my dog test positive for anaplasmosis?

Cornell says antibodies from previous exposure can remain detectable for several months. A dog can also stay positive after recovery; VCA says that does not necessarily mean the infection is still active, and a second course of antibiotics just to get a negative test is generally not recommended.

Can my dog give me anaplasmosis?

Not directly. Cornell says anaplasmosis is not directly transmittable between animals, including dogs and humans. Ticks are the shared risk, so check yourself after time outdoors and see your doctor if you develop symptoms after a tick bite.

Can an online vet prescribe doxycycline for anaplasmosis?

No antibiotic, including doxycycline, can be promised by video. Treatment usually follows an in-person blood count. Cornell says treatment runs at least two weeks, and four weeks may be necessary with Lyme co-infection, while Florida caps telehealth-only prescriptions at 14 days with no renewal without an in-person exam. If the veterinarian decides medication is appropriate, they can prescribe where state rules allow.

A positive anaplasma test in a dog who feels fine is usually a reason for a plan, not panic. If your dog is acting normal and you want help reading the report, book a video visit now. RexVet's veterinarians are licensed in Florida, New York and Virginia, are available 24/7, and a visit is $64.99. For a dog with any sign from the checklist above, go to an in-person or emergency vet first.