If Your Dog Was Bitten by Ticks — Key Facts on Human Q Fever Risk and Prevention

ImmunityDiseasesMeongsiljang Veterinary Advisory Board

Q fever is a zoonotic bacterial infection transmitted through ticks and the secretions of infected animals. Since pet owners can also become infected, early detection and preventive care are essential.

What Is Q Fever?

A puppy and a kitten sitting on the examination table, with a microscope and blood test tubes in the background.

Q fever is a zoonotic disease caused by Coxiella burnetii, a Gram-negative intracellular bacterium. Dogs and cats can contract it through tick bites, ingestion of meat contaminated with the bacteria, or contact with the placenta and birth fluids of infected animals during parturition. Early detection and hygiene management are key. While most dogs and cats show mild or no visible symptoms, Q fever is a zoonotic disease that can also infect humans, so it is safest to have your veterinarian evaluate your pet as soon as you suspect an issue.

How Is It Transmitted? Main Routes of Infection

Dogs and cats are most commonly infected through tick bites. When a tick feeds on an infected animal and then bites your pet, it can transmit the bacteria. Pets can also become infected by eating meat contaminated with Coxiella bacteria. Additionally, the placenta and birth fluids from infected animals giving birth are significant sources of transmission. In humans, infection is frequently reported after contact with livestock or exposure to stillborn offspring or dams in labor. Therefore, extra caution is essential when coming into contact with birthing environments.

Checklist of Main Symptoms

Dogs and cats infected with Coxiella burnetii often show no obvious symptoms. However, if you notice any of the following signs, it may indicate an infection such as Q fever: - Fever: Body temperature rises above normal, and the fever persists for several days. - Lethargy: The pet appears noticeably more sluggish and lacks energy compared to usual. - Loss of appetite: The pet refuses even favorite treats and eats poorly. - Weight loss: The pet loses weight due to reduced food intake. - Miscarriage or stillbirth: Pregnant pets may experience sudden miscarriage or give birth to weak offspring.

A pawless dog lying weakly on a blanket, with a caregiver gently stroking its forehead.

Visit the Vet Immediately in These Situations

If your pet has been bitten by ticks or has shown fever and lethargy for more than a day after recent outdoor activities or visits to farms, it’s best to visit the vet right away. This is especially important if a pregnant pet shows signs of miscarriage or if you, the owner, also experience flu-like symptoms, as these could indicate a zoonotic infection. While Q fever often presents with mild or no symptoms, delayed diagnosis and treatment in clinical cases can lead to slower recovery and prolonged symptoms, so it’s safer to seek veterinary care promptly.

How Is It Diagnosed?

Q fever isn’t routinely included in standard health checkups, but it can be confirmed through testing if suspected. The most helpful diagnostic tools are polymerase chain reaction (PCR) and immunohistochemistry (IHC), which directly detect Coxiella bacteria or their traces. If a tick was found attached to your pet, place it in a glass jar and bring it to the clinic, as this can aid in diagnosis. In cases of miscarriage, examining the placenta and fetal tissues can also help determine whether an infection occurred.

Treatment Methods and Recovery Period

Q fever is treated with antibiotics when clinical symptoms are present. According to veterinary textbooks, the recommended regimen is doxycycline at a dose of 10 mg per kilogram of body weight, administered once daily for approximately two weeks. However, asymptomatic latent infections may not require specific treatment, so your veterinarian will determine whether treatment is necessary and for how long, based on test results and the animal’s condition. It is crucial not to stop the medication midway, even if symptoms have resolved. Delayed diagnosis or treatment can lead to slower recovery and prolonged symptoms, so it is best to administer the full course as directed by your veterinarian.

A veterinarian administers oral medication to a puppy while the owner gently holds the child.

Comparison of Tick Preventive Medications (Veterinarian-Prescribed)

Item	Spot-on (fipronil)	Oral chewable (fluralaner)	Tick collar
Duration	About 1 month	About 3 months	About 6–8 months
Effect after water play	Partially reduced	No effect	No effect
Use in cats	Cat-only products only	Dedicated products available	Cat-only products only
Caution for guardian contact	Caution before drying	Almost none	Caution with child contact

Always decide on product choice after consulting your veterinarian. In particular, cats are at risk of poisoning when dog pyrethroid products are used.

How to Manage at Home

During treatment, it’s best to keep your pet separated from other animals. Pregnant individuals and pets should have minimal contact with the treated animal. After walks, carefully check behind the ears, under the armpits, in the groin area, and between the toes. If you find a tick, remove it entirely in one motion using tweezers, grasping it as close to the skin as possible. Avoid crushing the tick, as this can spread bacteria. Always wear gloves and a mask when cleaning up feces or birth-related secretions.

Protect Yourself Too — Zoonotic Disease Precautions

Q fever is a zoonotic disease that can also infect humans. Pregnant women, elderly individuals with weakened immune systems, and children should take particular care. It is safest for general pet owners to avoid directly assisting with the delivery of an infected animal. If your pet has been diagnosed with Q fever, we recommend informing your personal physician so they can also undergo testing. You may also want to review our Tick Prevention Guide for related information.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Can Q fever be completely cured?

Yes, during the acute phase when symptoms are present, most pets recover well with antibiotic treatment such as doxycycline. However, if treatment is stopped prematurely or diagnosis is delayed, recovery may be slower and symptoms can become chronic, so it’s important to administer the full course of medication as directed by your veterinarian.

Is there a vaccine available?

Commercial vaccines for pets are not yet widely used in Korea. The most practical preventive measures at present are consistent administration of tick preventatives and preventing access to wild animal carcasses and livestock birthing sites.

If my pet is diagnosed with a disease, do I also need to get tested?

We recommend that owners who have had close contact with the animal undergo testing. This is especially important if there are pregnant individuals or family members with weakened immune systems in the household, or if you directly assisted with the birth or miscarriage. Please be sure

Do cats use the same medications?

Doxycycline is commonly prescribed as an antibiotic, typically administered at a dose of 10 mg per kilogram of body weight once daily. However, the dosage and treatment duration may vary depending on the individual condition of cats and dogs, so it is essential to follow your veterinarian’s prescription. Importantly, never use dog-specific tick preventatives on cats, as pyrethroid-based products can cause severe toxicity in felines.

Does contracting the disease once confer immunity?

Even after a pet recovers from an infection, it’s unclear how much immunity develops or how long it lasts. Therefore, it’s important to continue tick prevention consistently and monitor your pet’s health through regular check-ups.

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References

[1] BSAVA Manual of Canine and Feline Dermatology, 4th Edition, Chapter on Ectoparasites

[2] Principles and Practices of Canine and Feline Clinical Parasitic Diseases

[3] Greene's Infectious Diseases of the Dog and Cat, 5th Edition, Chapter on Coxiellosis (Q Fever)