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Ticks can spread more than just Lyme disease: What to know about diseases like anaplasmosis, Powassan virus & more

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This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Contact a qualified medical professional before engaging in any physical activity, or making any changes to your diet, medication or lifestyle.

A female blacklegged tick crawling on a person's skin ready to bite. Ticks carry several diseases, and they might be spreading in Canada. (Photo via Getty Images)
Blacklegged ticks are the most common carriers of Lyme disease in Canada, but what other tick-borne illnesses should you know about? (Photo via Getty Images)

Ticks are the kinds of critters typically no one enjoys coming into contact with. From the dangers of Lyme disease to rising cases of anaplasmosis in Canada, it’s a good idea to understand some of the tick-borne illnesses you — or even your beloved pet — could contract if you’re spending any time outdoors this summer.

Across the country, there are more than 40 species of ticks. Additionally, experts warn ticks might be “fitter, better, faster and stronger” this year, and populations might be growing rapidly in Canada. But what exactly are the different tick-borne diseases you should be aware of? Scroll below to read more about ailments like anaplasmosis, babesiosis and Rocky Mountain spotted fever.


Lyme disease is caused by a bacterium called Borrelia burgdorferi, which is spread through the bite of infected blacklegged ticks. For most people, Lyme disease is contracted from a nymphs, which are about the size of poppy seeds, or adult female ticks, which are roughly the same size as sesame seeds.

Health Canada indicates these ticks must be attached for at least 24 hours in order to transmit the bacteria that causes Lyme disease. However, it’s worth noting not all blacklegged ticks are infected. They’ll only carry the bacteria after feeding on infected animals, including birds and rodents.

Oftentimes, Lyme disease symptoms can be mistaken for the flu. Within the first three to 30 days after a bite from an infected tick, a person might suffer a fever, chills, headache, swollen lymph nodes, muscle aches and fatigue.

A bullseye rash on a person's skin. (Photo via Getty Images)A bullseye rash on a person's skin. (Photo via Getty Images)
A bullseye-shaped rash is a tell-tale sign of Lyme disease. (Photo via Getty Images)

Luckily, you might be able to decipher if it’s Lyme disease by looking out for a rash — called Erythema migrans — that often develops at the site of the tick bite. These occur in roughly 70 to 80 per cent of infections, typically a week after infection. This rash might grow up to 12 inches in size and may feel warm or hot to the touch.

Eventually, symptoms might progress to include a severe headache and neck stiffness, as well as more rashes on other parts of the body. Other symptoms might include facial palsy, arthritis, nerve pain, dizziness, heart palpitations, shooting pains or tingling in the hands or feet as well as short-term memory problems.

Due to climate change, blacklegged ticks are spreading to new parts of Canada. Moreover, it’s not impossible to encounter one of theses ticks outside of where it’s known to live.

The federal government’s Lyme disease risk map indicates these ticks live in a few provinces, typically in southern zones. Nova Scotia and southern New Brunswick are considered risk areas; parts of southern Manitoba are also included, including Winnipeg, Brandon and Dauphin. Vancouver Island and southern British Columbia are also hot spot areas, including areas like Kelowna, Kamloops and Vancouver. In Ontario and Quebec, these ticks might be living in the southern parts of those provinces, including Montreal, the Greater Toronto Area and Ottawa. They might also be found in Thunder Bay and Kenora in Western Ontario, as well.

Parts of Ontario, Quebec, Manitoba, British Columbia, New Brunswick and Nova Scotia are considered areas with Lyme disease risk. (Photo via the Government of Canada)Parts of Ontario, Quebec, Manitoba, British Columbia, New Brunswick and Nova Scotia are considered areas with Lyme disease risk. (Photo via the Government of Canada)
Parts of Ontario, Quebec, Manitoba, British Columbia, New Brunswick and Nova Scotia are considered areas with Lyme disease risk. (Photo via the Government of Canada)

Like Lyme disease, anaplasmosis is spread by infected blacklegged ticks. However, the human version of this condition is caused by Anaplasma phagocytophilum. Sometimes, anaplasmosis might be called human granulocytic anaplasmosis, or HGA.

Anaplasmosis typically presents symptoms similar to that of the flu. But unlike Lyme disease, people who contract this ailment usually won’t develop a rash. Sometimes, it can even be asymptomatic.

The National Collaborating Centre for Infectious Diseases (NCCID) indicates fever, chills, headache, muscle pain, nausea, vomiting, diarrhea and loss of appetite might be symptoms of anaplasmosis. Symptoms typically start within a week or two of a tick bite.

A closeup of a blacklegged tick on a person's skin. (Photo via Getty Images)A closeup of a blacklegged tick on a person's skin. (Photo via Getty Images)
Ticks carry a range of bacteria, parasites and viruses. (Photo via Getty Images)

If you don’t get treatment, more severe symptoms like seizures or confusion might arise. More serious issues might also arise for people who are older than age 50 and for those who are immunocompromised.

Anaplasmosis is spread by infected blacklegged ticks, meaning the same areas where Lyme disease is a concern will also be a concern for this illness. But Central and Eastern Canada are predominantly areas of concern.

A recent Public Health Ontario report shows there were 40 cases of anaplasmosis in the province last year, 17 of which were confirmed. The majority of these cases were between June and August.

According to the NCCID, the first locally recorded case in Canada was in an Alberta resident in 2009, whereas Ontario only reported its first case in 2018. While risk levels across the country are relatively low, it continues to increase.


Babesiosis is also carried by blacklegged ticks that are infected with the parasite Babesia, including Babesia microti, Babesia duncani or Babesia divergens. Cases of the tick-borne infection are considered rare, but it’s considered emerging, which means the number of cases has increased in recent years.

Closeup of a blacklegged tick on a skin surface.Closeup of a blacklegged tick on a skin surface.
Closeup of a blacklegged tick on a skin surface.

Babesiosis symptoms are similar to that of the flu, according to Cleveland Clinic, and they typically begin one to four weeks after exposure. These symptoms may include:

  • High fever
  • Fatigue
  • Chills
  • Sweating
  • Headache
  • Muscle or joint aches
  • Loss of appetite
  • Cough

However, around a quarter of people with babesiosis don’t have symptoms. Moreover, this illness doesn’t create a rash. Immunocompromised people and anyone who’s older is at greater risk of severe illness, which might come with symptoms like jaundice, pale skin, darker urine, shortness of breath, nausea and vomiting, abdominal pain or sudden mood changes.

Until recently, babesiosis wasn’t found in Canada. But as blacklegged ticks spread to provinces like Ontario, Quebec, Manitoba, New Brunswick and Nova Scotia amid climate change and migratory birds, this illness is coming with them. The best way to avoid contracting this ailment is to avoid getting bitten by blacklegged ticks.


A sick women lying down with a blanket and reading her temperature. (Photo via Getty Images)A sick women lying down with a blanket and reading her temperature. (Photo via Getty Images)
Flu-like symptoms are common for tick-borne illnesses like Lyme disease, anaplasmosis and babesiosis. (Photo via Getty Images)

Bartonellosis, often known as cat scratch fever, is an infection caused by several species of Bartonella bacteria. There are around 15 species that are known to cause the illness in humans.

Luckily, the Centers for Disease Control and Prevention (CDC) notes there is no evidence that humans can contract bartonellosis from ticks. Instead, people might get it from fleas, lice, sand flies or from an infected animal, typically a cat. Bartonella has been found in several tick species, including blacklegged ticks, Lone Star ticks and Pacific Coast ticks, causing an issue for pets.

In humans, common bartonellosis symptoms include fever, chills, weakness, body aches, loss of appetite, headaches and swollen lymph nodes. These symptoms may appear days or weeks after exposure, and a mild infection typically goes away on its own in two to four months.

Most cases of bartonellosis are mild, but it’s possible some species can cause more severe illness. More serious symptoms, which are often seen in people who are immunocompromised, include arthritis, enlarged liver and spleen, nervousness, pneumonia, eye inflammation, and weight loss.

Since bartonella infections are typically transmitted to humans by cat scratches or, rarely, dog bites, it’s technically quite prevalent across the country. However, the NCCID notes Canada has only seen eight cases of the illness caused by the Bartonella quintana species since the mid-1990s.

A cat lies in a basket with a blanket. (Photo via Getty Images)A cat lies in a basket with a blanket. (Photo via Getty Images)
Bartonellosis is often referred to the cat scratch fever, since that’s how it’s typically transmitted to humans. (Photo via Getty Images)

Ehrlichiosis is most commonly caused by a bacteria called Ehrlichia chaffeensis. Although common, ehrlichiosis is spread to humans by blacklegged and lone star ticks, according to the CDC.

Like the other tick-borne diseases, ehrlichiosis symptoms often begin one to two weeks within a tick bite. Some people might remain asymptomatic, while people who are immunocompromised might see more severe cases. Ehrlichiosis symptoms include:

A woman experiencing nausea while she has her head over a toilet. (Photo via Getty Images)A woman experiencing nausea while she has her head over a toilet. (Photo via Getty Images)
Nausea is a common symptom of tick-borne illnesses. (Photo via Getty Images)

While blacklegged ticks might be able to transmit ehrlichiosis, it’s more common to get the illness from a lone star tick. According to the Public Health Agency of Canada (PHAC), these ticks have been found in Alberta, Manitoba, Nova Scotia, Ontario, Quebec and Saskatchewan.


Powassan virus is a rare disease, but it’s still contracted by tick bites. Blacklegged ticks are the main culprit of this illness, but in rare cases, groundhog and squirrel ticks can transmit Powassan virus.

After a bite from an infected tick, Powassan virus symptoms might appear anywhere between one and four weeks. Common symptoms include fever and headaches, which can be followed by vomiting, fatigue, confusion, seizures, difficulty speaking or paralysis.

While many people don’t have symptoms with Powassan virus, it can also lead to encephalitis. This brain swelling can lead to permanent neurological conditions, like memory issues and paralysis, and it can even be fatal.

The disease was named after Powassan, Ont., which is where the first case of the illness was identified in 1958. On top of where blacklegged ticks are found, groundhog ticks have been spotted in Ontario, Quebec, Manitoba and the Atlantic provinces. Squirrel ticks, which often don’t bite humans, have been found in all of those areas except for Manitoba, according to the PHAC.

A tick walks on a persons hand. (Photo via Getty Images)A tick walks on a persons hand. (Photo via Getty Images)
Groundhog ticks look similar to blacklegged ticks. Luckily, groundhog ticks haven’t been associated with Lyme disease. (Photo via Getty Images)

Rocky Mountain spotted fever (RMSF) is spread by the bacterium Rickettsia rickettsii. It’s a serious tick-borne illness that’s spread by the Rocky Mountain wood tick and the American dog tick, BC Centre for Disease Control states.

Early symptoms of RMSF include fever, headache, nausea, vomiting, stomach pain, muscle pain and loss of appetite. Moreover, a rash is a common sign of RMSF that typically develops two to four days after a fever begins. The CDC states the rash’s appearance may change over the course of the illness, oftentimes appearing late in the infection.

Rocky Mountain wood ticks are most commonly found in southern Alberta and British Columbia. However, they’re also increasingly spotted in southwestern Saskatchewan. On the other hand, American dog ticks are established in parts of southcentral and southeastern Canada.

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Health Canada approves updated Moderna COVID-19 vaccine

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TORONTO – Health Canada has authorized Moderna’s updated COVID-19 vaccine that protects against currently circulating variants of the virus.

The mRNA vaccine, called Spikevax, has been reformulated to target the KP.2 subvariant of Omicron.

It will replace the previous version of the vaccine that was released a year ago, which targeted the XBB.1.5 subvariant of Omicron.

Health Canada recently asked provinces and territories to get rid of their older COVID-19 vaccines to ensure the most current vaccine will be used during this fall’s respiratory virus season.

Health Canada is also reviewing two other updated COVID-19 vaccines but has not yet authorized them.

They are Pfizer’s Comirnaty, which is also an mRNA vaccine, as well as Novavax’s protein-based vaccine.

This report by The Canadian Press was first published Sept. 17, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

The Canadian Press. All rights reserved.

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These people say they got listeria after drinking recalled plant-based milks

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TORONTO – Sanniah Jabeen holds a sonogram of the unborn baby she lost after contracting listeria last December. Beneath, it says “love at first sight.”

Jabeen says she believes she and her baby were poisoned by a listeria outbreak linked to some plant-based milks and wants answers. An investigation continues into the recall declared July 8 of several Silk and Great Value plant-based beverages.

“I don’t even have the words. I’m still processing that,” Jabeen says of her loss. She was 18 weeks pregnant when she went into preterm labour.

The first infection linked to the recall was traced back to August 2023. One year later on Aug. 12, 2024, the Public Health Agency of Canada said three people had died and 20 were infected.

The number of cases is likely much higher, says Lawrence Goodridge, Canada Research Chair in foodborne pathogen dynamics at the University of Guelph: “For every person known, generally speaking, there’s typically 20 to 25 or maybe 30 people that are unknown.”

The case count has remained unchanged over the last month, but the Public Health Agency of Canada says it won’t declare the outbreak over until early October because of listeria’s 70-day incubation period and the reporting delays that accompany it.

Danone Canada’s head of communications said in an email Wednesday that the company is still investigating the “root cause” of the outbreak, which has been linked to a production line at a Pickering, Ont., packaging facility.

Pregnant people, adults over 60, and those with weakened immune systems are most at risk of becoming sick with severe listeriosis. If the infection spreads to an unborn baby, Health Canada says it can cause miscarriage, stillbirth, premature birth or life-threatening illness in a newborn.

The Canadian Press spoke to 10 people, from the parents of a toddler to an 89-year-old senior, who say they became sick with listeria after drinking from cartons of plant-based milk stamped with the recalled product code. Here’s a look at some of their experiences.

Sanniah Jabeen, 32, Toronto

Jabeen says she regularly drank Silk oat and almond milk in smoothies while pregnant, and began vomiting seven times a day and shivering at night in December 2023. She had “the worst headache of (her) life” when she went to the emergency room on Dec. 15.

“I just wasn’t functioning like a normal human being,” Jabeen says.

Told she was dehydrated, Jabeen was given fluids and a blood test and sent home. Four days later, she returned to hospital.

“They told me that since you’re 18 weeks, there’s nothing you can do to save your baby,” says Jabeen, who moved to Toronto from Pakistan five years ago.

Jabeen later learned she had listeriosis and an autopsy revealed her baby was infected, too.

“It broke my heart to read that report because I was just imagining my baby drinking poisoned amniotic fluid inside of me. The womb is a place where your baby is supposed to be the safest,” Jabeen said.

Jabeen’s case is likely not included in PHAC’s count. Jabeen says she was called by Health Canada and asked what dairy and fresh produce she ate – foods more commonly associated with listeria – but not asked about plant-based beverages.

She’s pregnant again, and is due in several months. At first, she was scared to eat, not knowing what caused the infection during her last pregnancy.

“Ever since I learned about the almond, oat milk situation, I’ve been feeling a bit better knowing that it wasn’t something that I did. It was something else that caused it. It wasn’t my fault,” Jabeen said.

She’s since joined a proposed class action lawsuit launched by LPC Avocates against the manufacturers and sellers of Silk and Great Value plant-based beverages. The lawsuit has not yet been certified by a judge.

Natalie Grant and her seven year-old daughter, Bowmanville, Ont.

Natalie Grant says she was in a hospital waiting room when she saw a television news report about the recall. She wondered if the dark chocolate almond milk her daughter drank daily was contaminated.

She had brought the girl to hospital because she was vomiting every half hour, constantly on the toilet with diarrhea, and had severe pain in her abdomen.

“I’m definitely thinking that this is a pretty solid chance that she’s got listeria at this point because I knew she had all the symptoms,” Grant says of seeing the news report.

Once her daughter could hold fluids, they went home and Grant cross-checked the recalled product code – 7825 – with the one on her carton. They matched.

“I called the emerg and I said I’m pretty confident she’s been exposed,” Grant said. She was told to return to the hospital if her daughter’s symptoms worsened. An hour and a half later, her fever spiked, the vomiting returned, her face flushed and her energy plummeted.

Grant says they were sent to a hospital in Ajax, Ont. and stayed two weeks while her daughter received antibiotics four times a day until she was discharged July 23.

“Knowing that my little one was just so affected and how it affected us as a family alone, there’s a bitterness left behind,” Grant said. She’s also joined the proposed class action.

Thelma Feldman, 89, Toronto

Thelma Feldman says she regularly taught yoga to friends in her condo building before getting sickened by listeria on July 2. Now, she has a walker and her body aches. She has headaches and digestive problems.

“I’m kind of depressed,” she says.

“It’s caused me a lot of physical and emotional pain.”

Much of the early days of her illness are a blur. She knows she boarded an ambulance with profuse diarrhea on July 2 and spent five days at North York General Hospital. Afterwards, she remembers Health Canada officials entering her apartment and removing Silk almond milk from her fridge, and volunteers from a community organization giving her sponge baths.

“At my age, 89, I’m not a kid anymore and healing takes longer,” Feldman says.

“I don’t even feel like being with people. I just sit at home.”

Jasmine Jiles and three-year-old Max, Kahnawake Mohawk Territory, Que.

Jasmine Jiles says her three-year-old son Max came down with flu-like symptoms and cradled his ears in what she interpreted as a sign of pain, like the one pounding in her own head, around early July.

When Jiles heard about the recall soon after, she called Danone Canada, the plant-based milk manufacturer, to find out if their Silk coconut milk was in the contaminated batch. It was, she says.

“My son is very small, he’s very young, so I asked what we do in terms of overall monitoring and she said someone from the company would get in touch within 24 to 48 hours,” Jiles says from a First Nations reserve near Montreal.

“I never got a call back. I never got an email”

At home, her son’s fever broke after three days, but gas pains stuck with him, she says. It took a couple weeks for him to get back to normal.

“In hindsight, I should have taken him (to the hospital) but we just tried to see if we could nurse him at home because wait times are pretty extreme,” Jiles says, “and I don’t have child care at the moment.”

Joseph Desmond, 50, Sydney, N.S.

Joseph Desmond says he suffered a seizure and fell off his sofa on July 9. He went to the emergency room, where they ran an electroencephalogram (EEG) test, and then returned home. Within hours, he had a second seizure and went back to hospital.

His third seizure happened the next morning while walking to the nurse’s station.

In severe cases of listeriosis, bacteria can spread to the central nervous system and cause seizures, according to Health Canada.

“The last two months have really been a nightmare,” says Desmond, who has joined the proposed lawsuit.

When he returned home from the hospital, his daughter took a carton of Silk dark chocolate almond milk out of the fridge and asked if he had heard about the recall. By that point, Desmond says he was on his second two-litre carton after finishing the first in June.

“It was pretty scary. Terrifying. I honestly thought I was going to die.”

Cheryl McCombe, 63, Haliburton, Ont.

The morning after suffering a second episode of vomiting, feverish sweats and diarrhea in the middle of the night in early July, Cheryl McCombe scrolled through the news on her phone and came across the recall.

A few years earlier, McCombe says she started drinking plant-based milks because it seemed like a healthier choice to splash in her morning coffee. On June 30, she bought two cartons of Silk cashew almond milk.

“It was on the (recall) list. I thought, ‘Oh my God, I got listeria,’” McCombe says. She called her doctor’s office and visited an urgent care clinic hoping to get tested and confirm her suspicion, but she says, “I was basically shut down at the door.”

Public Health Ontario does not recommend listeria testing for infected individuals with mild symptoms unless they are at risk of developing severe illness, such as people who are immunocompromised, elderly, pregnant or newborn.

“No wonder they couldn’t connect the dots,” she adds, referencing that it took close to a year for public health officials to find the source of the outbreak.

“I am a woman in my 60s and sometimes these signs are of, you know, when you’re vomiting and things like that, it can be a sign in women of a bigger issue,” McCombe says. She was seeking confirmation that wasn’t the case.

Disappointed, with her stomach still feeling off, she says she decided to boost her gut health with probiotics. After a couple weeks she started to feel like herself.

But since then, McCombe says, “I’m back on Kawartha Dairy cream in my coffee.”

This report by The Canadian Press was first published Sept. 16, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

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B.C. mayors seek ‘immediate action’ from federal government on mental health crisis

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VANCOUVER – Mayors and other leaders from several British Columbia communities say the provincial and federal governments need to take “immediate action” to tackle mental health and public safety issues that have reached crisis levels.

Vancouver Mayor Ken Sim says it’s become “abundantly clear” that mental health and addiction issues and public safety have caused crises that are “gripping” Vancouver, and he and other politicians, First Nations leaders and law enforcement officials are pleading for federal and provincial help.

In a letter to Prime Minister Justin Trudeau and Premier David Eby, mayors say there are “three critical fronts” that require action including “mandatory care” for people with severe mental health and addiction issues.

The letter says senior governments also need to bring in “meaningful bail reform” for repeat offenders, and the federal government must improve policing at Metro Vancouver ports to stop illicit drugs from coming in and stolen vehicles from being exported.

Sim says the “current system” has failed British Columbians, and the number of people dealing with severe mental health and addiction issues due to lack of proper care has “reached a critical point.”

Vancouver Police Chief Adam Palmer says repeat violent offenders are too often released on bail due to a “revolving door of justice,” and a new approach is needed to deal with mentally ill people who “pose a serious and immediate danger to themselves and others.”

This report by The Canadian Press was first published Sept. 16, 2024

The Canadian Press. All rights reserved.

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