Last updated: May 6, 2026
In this article
What “Tick Fever” Actually Means
Tick fever in Singapore is an umbrella term that owners and even some vets use to describe a cluster of tick-borne diseases that can infect dogs in tropical climates. The most common one in Singapore is canine monocytic ehrlichiosis, caused by the bacteria Ehrlichia canis. Others in the same family include Anaplasma platys, Anaplasma phagocytophilum, and Hepatozoon canis, and dogs can be co-infected with several at once, along with Babesia, which is covered in its own article.
These organisms are transmitted primarily by the brown dog tick, Rhipicephalus sanguineus, a species that thrives in warm, humid environments and can complete its entire life cycle indoors. Unlike ticks in temperate countries that live in forests and grass, the brown dog tick is perfectly happy in an HDB flat, breeding in cracks of floors, along skirting boards, in kennels, and inside pet bedding. That is why tick fever is not just a “bush walk” disease in Singapore but can infect dogs who never leave the immediate neighborhood.
When a tick attaches and feeds, Ehrlichia organisms travel from the tick’s saliva into the dog’s bloodstream, where they invade white blood cells and begin to multiply. The incubation period is one to three weeks, after which an acute phase begins. Some dogs clear the infection. Others progress through a subclinical phase to a chronic phase that can be debilitating and, in severe cases, fatal.
The Three Phases of Ehrlichiosis
Recognizing which phase your dog is in shapes both urgency and treatment approach. The acute phase begins one to three weeks after a tick bite and lasts up to four weeks. Symptoms include fever, loss of appetite, lethargy, weight loss, enlarged lymph nodes, nasal or eye discharge, and sometimes nosebleeds from low platelet counts. Many dogs at this stage look like they have a flu-like illness that does not resolve on its own.
The subclinical phase can last months to years and is often silent. The dog appears fine, but bloodwork shows mildly low platelets, mild anemia, or elevated globulins. Dogs in this phase may be missed entirely unless they have routine preventive bloodwork or a PCR screen. The organism continues to live in spleen, bone marrow, and liver during this window.
The chronic phase is the dangerous one. Bone marrow suppression causes severe drops in platelets, red blood cells, and white blood cells. Dogs may present with spontaneous bleeding, pale gums, crashing weakness, joint swelling, eye hemorrhages, neurological signs, or kidney damage. Treatment at this stage is still possible but much harder, and some dogs do not survive.
Symptoms to Watch For
Early signs are easy to mistake for “just a bit off.” A dog who eats less than usual for two days, seems subdued, has a slightly warm nose, or whose gums are a bit paler than normal is worth a vet visit, especially if you have seen even one tick in the previous month.
More specific signs include bruising on the belly or gums, which indicates low platelets; pinpoint red spots called petechiae on pale skin or inside the lips; recurrent nosebleeds; bloody urine or stool; red or cloudy eyes; swollen joints; or a visibly enlarged belly from spleen enlargement. Any unexplained bruising in a dog in a tropical climate should trigger an immediate vet visit.
In puppies and young dogs, acute ehrlichiosis can look dramatic with high fever, rapid weight loss, and crashing platelets. In older dogs, the chronic form may creep in slowly, with owners reporting “he’s slowing down” or “he just seems tired” until a routine blood test shows severe abnormalities.
How Vets Diagnose Tick Fever
Diagnosis combines clinical suspicion with bloodwork and specific tests. A complete blood count almost always shows thrombocytopenia, meaning low platelet counts, often dramatically so. Many dogs also show mild anemia, and a blood smear may reveal characteristic morulae, clusters of bacteria inside white blood cells, though these are not always visible.
The two most common confirmatory tests are a rapid in-clinic antibody test, which gives a yes or no answer to recent or past exposure, and PCR, which detects bacterial DNA directly and confirms active infection. Because antibodies can persist for months after a successful treatment, PCR is better for confirming ongoing infection. Serology from a reference lab can also quantify antibody titers.
A thorough workup also screens for Babesia and Anaplasma, because co-infections are common and change treatment planning. Chronic cases may need bone marrow aspirates to assess the degree of suppression and kidney, liver, and urine tests to check organ function. Your vet may also order chest or abdominal imaging in severely ill dogs.
Treatment Protocols
The standard treatment for Ehrlichia canis is doxycycline, a tetracycline antibiotic, given orally once or twice daily for four weeks. Acute cases usually improve within a few days of starting therapy, with platelet counts climbing and fever breaking. Dogs who do not respond may be co-infected or in the severe chronic phase and need additional medication.
Severely affected dogs may need hospitalization for intravenous fluids, blood or plasma transfusions, anti-inflammatory medication, and supportive nursing care. Corticosteroids are sometimes used short-term for dogs with immune-mediated complications, though this is a vet judgment call because steroids can mask infection.
After treatment, recheck bloodwork at two weeks, four weeks, and again at eight to twelve weeks to confirm platelet recovery and absence of relapse. A dog who seems clinically well but whose platelets stay low may still have active disease. Do not skip rechecks, and do not stop doxycycline early because symptoms resolved.
Prevention: The Only Strategy That Really Works
Because the brown dog tick can live indoors in Singapore and tick fever can cause permanent damage if chronic, prevention is non-negotiable. The cornerstone is year-round tick prevention using a veterinary-grade product. Options include oral isoxazoline chewables like afoxolaner, fluralaner, sarolaner, and lotilaner, which kill ticks before they can transmit disease; topical spot-ons; and tick collars containing imidacloprid plus flumethrin.
Combination products that handle fleas, ticks, heartworm, and intestinal worms in one dose make compliance easier. Ask your vet which product fits your dog’s size, lifestyle, and risk profile. In households with children or cats, avoid topical permethrin products, which are toxic to cats on contact.
Environmental control is equally important. Inspect your dog after every outdoor walk, paying attention to ears, between toes, armpits, groin, and under the collar. Wash bedding weekly in hot water. Vacuum floor cracks and skirting boards regularly. If you find ticks in your home, treat the environment with an appropriate acaricide or hire a professional, and treat all pets simultaneously.
Removing a Tick Safely
If you find an attached tick, remove it promptly. Use fine-tipped tweezers or a tick removal tool. Grasp the tick as close to the skin as possible, pull straight out with steady pressure, and avoid twisting or squeezing the body. Do not use matches, alcohol, or petroleum jelly to make the tick “back out,” because these methods can cause the tick to regurgitate infective material into the wound.
Once removed, drop the tick into a small container of alcohol or seal it in tape. Clean the bite site with antiseptic and monitor for a few weeks. Save the tick if you can. If your dog develops symptoms, the tick may help with species identification. Most bite sites heal without complication, but watch for spreading redness, swelling, or pus, which would prompt a vet visit.
A single bite does not guarantee infection, but every attached tick is a risk, especially if it has been feeding for more than twenty-four hours. If your dog is not on preventive medication and you find a tick, book a check-up and baseline bloodwork.
Frequently Asked Questions
Can humans catch tick fever from dogs?
Ehrlichia canis is primarily a dog pathogen, but related species can infect humans. The bigger concern is the brown dog tick itself, which can occasionally bite humans. Preventing tick infestation in your home protects everyone.
My dog’s platelets are slightly low but he seems fine. Is that tick fever?
It might be the subclinical phase, or it might be something else. Ask your vet about PCR testing and a thorough tick-borne disease panel. Do not ignore low platelets because the dog looks normal.
Is tick fever curable?
Acute ehrlichiosis is usually treatable with doxycycline and most dogs recover fully. Chronic cases with severe bone marrow suppression are harder and some dogs never return to full health. Early detection dramatically improves outcomes.
Can indoor-only dogs get tick fever?
Yes, if brown dog ticks enter the home on other pets, people, or secondhand furniture. This is one reason year-round prevention is recommended even for dogs who rarely go outside.
How soon after a tick bite should I test?
Antibody tests can take two to three weeks to turn positive. If your dog is asymptomatic, wait at least three weeks after removal before testing. If your dog develops symptoms, do not wait. Test immediately because PCR can detect the organism earlier.
Will my dog relapse after treatment?
Some do, particularly those treated late or co-infected with Babesia or Anaplasma. That is why follow-up bloodwork is essential. Relapses respond to repeat doxycycline courses, but outcomes are better when the original infection is caught early.
For more tropical disease guidance, read our articles on babesiosis in Singapore dogs, tropical tick control, and heartworm prevention. Considering adoption? Our adopt a dog hub can help you prepare.
