The thought of ticks makes most people cringe. Not only do they feed on our blood, they can also carry Lyme disease. 

But this isn’t the only disease you should be worried about. Different species of ticks can carry different bacteria and viruses. 

To find out everything you need to know about ticks in Ontario, including the diseases you need to be aware of and how to prevent them, keep reading. 

Ticks are arachnids that go through 4 stages of life: 

Between each stage, a tick must have a blood meal or else it won’t survive. Once it has fed, the tick will fall off its host to molt. Each type of tick has preferred hosts but can feed on any animal they encounter. This is especially true for immature ticks in the nymph stage.  

Ticks are often confused with insects, especially when they’re in the larval stage and only have 6 legs. But adult ticks have 8 legs and are in the same family as spiders, mites and scorpions. 

Unlike spiders, who have defined waists, there’s no clear separation between a tick’s abdomen and the rest of its body. Instead, their bodies are flat and teardrop shaped. After feeding, ticks will grow in size, become bloated and look rounder. They can even get as big as a small grape. 

Many people believe that ticks can fly or jump, but this is not true. Ticks are very slow moving. They climb up tall grasses and plants to await their next victim. Some can be more aggressive, seeking out animals and humans, but only certain Ontario ticks will do this.

Ticks in Ontario are most active in the spring and summer. That being said, you can find ticks any time the temperature is above freezing. That’s why you should be on the lookout whenever the daytime temperature is over 0°C. 

There are two main ticks in Ontario called the black legged tick and American dog tick. There is also a third tick, called the lone star tick that is new to Ontario. These ticks are limited to specific areas but may spread. 

While other ticks do call Ontario home, like the squirrel and groundhog tick, these are of lesser concern as they rarely bite. 

It’s also possible, though less common, to get bit by other ticks that are less prominent and even unknown in the province. While ticks don’t move far on their own, they do travel on migratory birds and other animals so they can fall off outside their normal area. Climate change is also causing ticks to spread outside their original territories. 

Knowing how to identify ticks is important as it narrows down which diseases you should be watching out for. Even more so now that ticks can no longer be submitted for pathogen testing. 

Once you know how to identify the different species of ticks, we’ll talk about the diseases they can potentially carry. 

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Also known as deer ticks, the black legged tick is the most common in Ontario. As their alternate name suggests, they’re often found on deer.

Black legged ticks are hard-bodied ticks that are 1 to 5 mm long. This makes them very hard to see before they feed. Immature ticks can be as small as a poppyseed, while adults are closer to the size of a sesame seed. This also means their bites are usually painless. 

Male black legged ticks are dark brown or black. Females are red or orange with a black or dark brown shield on their upper body. 

These ticks are most often found in forested areas around: 

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The American dog tick, or wood tick is another hard-bodied tick. They’re the second most common tick in Ontario and prefer using dogs as a host. 

Adult American dog ticks are the size of an apple seed and are usually a reddish-brown colour. Females have white or silver markings on their dorsal shield, while males usually have markings all over their backs. 

This species of tick is usually found in wooded areas with long grass and are usually found in Southern Ontario. 

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First discovered in Ontario in 2017, lone star ticks (turkey ticks) are new to Canada and not yet established. This means it’s much less likely you’ll come across one.

Adult lone star tick bodies are usually rounder in shape and 4 to 6 mm in size. Because they are larger in size, they’re usually easier to find. They also have more painful bites. 

They can range in colour from reddish-brown to tan. Females are more distinguishable thanks to the single white spot found in the centre of their backs. Males have white spots and streaks around the margins of their back. 

These ticks are usually found in forests with thick undergrowth and were first discovered in Southwestern Ontario. Unlike other ticks that will wait for animals to come to them, lone star ticks actively hunt. They will crawl towards their host to feed and usually do so in groups. So, if you find one lone star tick, there’s a good chance there are more … so, keep looking. 

Squirrel ticks are common in Ontario but they rarely bite humans. Instead, they feed on squirrels, chipmunks, hares, foxes and racoons. 

Female squirrel ticks have a tan coloured body with a darker dorsal shield. Males are predominantly reddish tan, with a lighter colour around the margins of their back. 

These ticks are usually found in the nests of their hosts or in buildings where squirrels have made their homes. 

The groundhog tick, also called the woodchuck tick, is another species that rarely bites humans. 

Adult groundhog ticks are about the size of a sesame seed. Females are generally tan or reddish tan with a darker shield. Males are mostly tan with a light tan margin. Groundhog ticks are sometimes mistaken for blacklegged ticks without a microscope. 

Unlike other ticks, groundhog ticks can live for a year or more without a host to feed on. 

Like squirrel ticks, they usually live in dens and nests of hosts. 

RELATED: SMDHU promotes free app to help identify ticks …

Lyme disease is caused by the Borrelia burgdorferi bacteria and can be a serious illness if not properly managed. 

In Ontario, the Lyme disease bacteria is carried by the black legged tick. However not all black legged ticks carry the bacteria. It’s also believed that there’s less risk of infection if the tick is removed within 24 hours. 

Groundhog ticks can sometimes carry Lyme disease but do not usually transmit it. 

Symptoms of Lyme disease can show up between 3 to 30 days after you get a bite. However, most people show symptoms within 1 to 2 weeks.

The first symptom of Lyme disease is usually a rash. The most common is a bullseye rash, which is usually more than 5 cm in diameter and spreads outwards like a bullseye. That being said, bruise-like rashes or other unusual rashes should also cause alarm. Especially if you have found a tick or were in an area where ticks commonly live. 

Other symptoms of Lyme disease include: 

If you have any of these symptoms and have been somewhere that ticks could live, call your doctor. 

If you’re bitten by a tick with the Borrelia burgdorferi bacteria there’s also a chance that you will be asymptomatic. That means you may not show symptoms. While this usually means your prognosis will be good, some people have been afflicted by problems later in life. If you find a black-legged tick on your body, you should contact your doctor. 

Doctors can often diagnose Lyme disease based on symptoms but sometimes lab tests are required. 

The National Microbiology Laboratory no longer tests individual ticks for pathogens. While you’re still able to submit ticks for identification, it’s generally faster to identify using etick.ca. 

Most cases of Lyme disease don’t require antibiotic treatment. Antibiotics may be recommended if the tick was attached for a long time. They may also be used if you were in an area where the disease is common. 

If antibiotics are required, it’s best to start them within 72 hours of the bite. So be sure to reach out to your doctor right away. 

If left untreated, Lyme disease can make you feel weak or tired. It can also become a multisystem disease, affecting your heart, nerves, liver and joints. In severe cases, untreated Lyme disease can cause arthritis, neurological issues, numbness and paralysis. In rare cases, it can even lead to death. 

The most well known and common tick disease in Ontario is Lyme disease. However, it is not the only disease that ticks can carry. Though these diseases are rare, knowing what they are will help you catch them early if you’re infected. 

Anaplasmosis is another disease carried by the black legged tick. This disease is caused by the  Anaplasma phagocytophilum bacteria. In 2021, there were 16 confirmed cases in the Kingston, Frontenac, Lennox and Addington area. While the risk remains low in Ontario, you should be aware of the symptoms if you are bit by a black legged tick in the Kingston area. 

It’s possible to have an asymptomatic infection, but most people get nonspecific symptoms within 1 to 2 weeks including: 

Babesiosis is also carried by black legged ticks. It’s a life-threatening infection of the red blood cells caused by the Babesia microti bacteria. 

So far, human babeosis cases have only appeared in Manitoba, though the pathogen has been found in Ontario ticks. 

Babeosis is a Lyme-like disease, making the two diseases harder to distinguish. Signs and symptoms of a possible babeosis infection include: 

Babeosis can also cause hemolytic armenia, which means your red blood cells die faster than new ones are made. Symptoms of  hemolytic armenia are: 

The Powassan virus was first discovered in Ontario. Several different species of ticks can carry this disease including black legged ticks, groundhog ticks, and squirrel ticks.

Symptoms of Powassan infection include: 

In rare cases, the virus can cause Powassan encephalitis. This causes the brain to swell, which can lead to brain damage. 

Ticks can transmit Powassan virus in as little as 15 to 30 minutes, which is much more quickly than other diseases. That being said, most infections don’t cause disease. From 1958 to 2017, there have only been 21 cases of Powassan virus disease. 

Borrelia miyamotoi produces a Lyme-like disease, but without the rash. In rare cases, it can also cause meningoencephalitis. 

There’s been no human detection in Canadians to date, but it’s carried by black legged ticks in Ontario. Symptoms of the disease include: 

Less common symptoms include: dizziness, confusion, vertigo, rash, dyspnea, nausea, abdominal pain, diarrhea and anorexia. 

Rocky Mountain spotted fever is caused by the Rickettsia rickettsii bacteria. Symptoms of this disease usually appear within 5 to 10 days of a bite and include: 

As the name suggests, this virus is more common in the Western provinces. While the American dog tick common to Ontario does carry the bacteria, there is only one locally acquired case to date. 

Tularemia, also known as Rabbit Fever, is caused by Francisella tularensis. The disease is very rare, with only 4 cases in Ontario from 2011 to 2020. Symptoms of rabbit fever include: 

It can also cause pneumonia or throat infections. 

This virus has been seen Canada wide with detection in humans. In Ontario, it’s carried by the American dog tick. 

Other diseases also exist but they’re either not present in Ontario, are even less common or have not been detected in humans yet. 

In most cases, quick tick removal is key to preventing the spread of disease. That being said, you don’t want to rush. Tick removal requires a delicate hand. Without it, you could increase the risk of transmission. 

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If you find a tick on you, a family member or a pet, follow these instructions: 

1. Get Hold Of The Tick 

Use fine tipped tweezers to grab the tick as close to the skin as possible. You can also use a tick remover tool.

DON’T remove the tick with your fingers. Try to locate or find a store with tweezers or a tick key.  If you absolutely must use your fingers, use a tissue or paper towel then clean and disinfect your hands and the bite area immediately. 

DON’T use nail polish, vaseline, repellents, lit match or cigarette, nail polish, nail polish remover, kerosene, or liquid soap. These are myths and aren’t effective/ can be dangerous. They can also cause bacteria to spread, increasing risk of infection. 

2. Gently Pull The Tick Out 

Pull the tick straight out, gently but firmly. 

DON’T jerk, twist or crush the tick. This can release the bacteria and increase your risk of infection. 

Wash your hands and the skin around the bite and hands with soap and water. Once finished, disinfect your hands and the bite with rubbing alcohol. 

Kill the tick by putting it in alcohol. Try to identify the tick. If you are unable to, your health unit or doctor may be able to submit it for identification. 

DON’T simply throw the tick out or wash it down the drain. It can crawl back out.

While prompt removal of a tick can help reduce the risk of disease, preventing the bite in the first place is even better. 

There are many steps you can take to prevent tick bites. 

By taking these steps to prevent tick bites and knowing what to do if you find a tick, you can help keep you and your family safe.