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Western-led study points to possible long COVID trigger in lungs – The London Free Press

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London researchers are uncovering a potential culprit behind long COVID symptoms, using lung imaging to analyze microscopic abnormalities that may trigger its lingering effects.

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London researchers are uncovering a potential culprit behind long COVID symptoms, using lung imaging to analyze microscopic abnormalities that may trigger its lingering effects.

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The Western University-led study, involving five Ontario medical centres, used functional MRI imaging with inhaled xenon gas to study the lungs of patients with long COVID symptoms, including brain fog, shortness of breath and fatigue.

Researchers found tiny changes affecting how oxygen moves from the lungs’ tiny air sacs, called alveoli, to red blood cells, abnormalities that weren’t showing up in traditional tests.

“It’s a conundrum to know what to do for patients when they have symptoms, but their pulmonary function tests are normal, their CT scans and chest X-rays are normal. You can’t treat something you can’t find,” Western professor Grace Parraga said Tuesday.

“By finding the abnormality in all these patients, now we know what to do . . . and what to track over time as their symptoms evolve.”

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Study participants inhaled the polarized xenon inside the MRI, giving researchers a real-time snapshot of how the lungs’ hundreds of millions of alveoli were functioning. The lung structures, about one-fifth of a millimeter in diameter, are critical to getting oxygen into the bloodstream.

“In these patients . . . the blood vessels in the lungs are either pruned or stunted or perhaps blocked,” Parraga said. “There may be some residual, microscopic clots that you can’t see using any other method.”

Researchers studied 34 patients with suspected long COVID, recruited from London Health Sciences Centre’s urgent COVID-19 care clinic and St. Joseph’s Health Care London’s post-acute COVID-19 program. The results were compared to a control group of six healthy patients.

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All participants had contracted COVID during the pandemic’s first few waves – before vaccines were widely available – not during this year’s Omicron-fuelled fifth wave, Parraga said.

Participants had shortness of breath more than six weeks after infection and some were still symptomatic after 35 weeks.

One participant was London Olympic bobsled gold medallist Alex Kopacz, who went public about his COVID hospitalization and lingering symptoms in May 2021.

“I was on oxygen for almost two months after COVID, and it took me almost three months to get to a place where I could go for a walk without gasping for air,” Kopacz said in a release Tuesday. “. . . We have to remember that this virus can have very serious long-term consequences, which are not trivial.”

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While many patients recover from COVID with no lasting symptoms, some report lingering issues such as chronic cough, joint pain, shortness of breath, muscle aches, intense fatigue or brain fog.

The Western team found the microscopic lung abnormality did not appear to be any worse in patients hospitalized with COVID-19 than those who recovered at home, said Michael Nicholson, a St. Joseph’s respirologist and associate scientist at Lawson Health Research Institute.

“This helps open the door to further research into some of the abnormalities we found, looking at a mechanism about why this is happening,” he said Tuesday.

The research, the largest MRI study of long COVID patients to date, was published Tuesday in the medical journal Radiology.

The study was done through a partnership of researchers at LHSC, St. Joseph’s, Thunder Bay’s Lakehead University, Hamilton’s McMaster University, Toronto Metropolitan University and Toronto’s Sick Kids Hospital.

The team plans an updated followup study on participants a year after their initial assessment.

jbieman@postmedia.com

Twitter.com/JenatLFPress

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Canada to donate up to 200,000 vaccine doses to combat mpox outbreaks in Africa

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The Canadian government says it will donate up to 200,000 vaccine doses to fight the mpox outbreak in Congo and other African countries.

It says the donated doses of Imvamune will come from Canada’s existing supply and will not affect the country’s preparedness for mpox cases in this country.

Minister of Health Mark Holland says the donation “will help to protect those in the most affected regions of Africa and will help prevent further spread of the virus.”

Dr. Madhukar Pai, Canada research chair in epidemiology and global health, says although the donation is welcome, it is a very small portion of the estimated 10 million vaccine doses needed to control the outbreak.

Vaccine donations from wealthier countries have only recently started arriving in Africa, almost a month after the World Health Organization declared the mpox outbreak a public health emergency of international concern.

A few days after the declaration in August, Global Affairs Canada announced a contribution of $1 million for mpox surveillance, diagnostic tools, research and community awareness in Africa.

On Thursday, the Africa Centres for Disease Control and Prevention said mpox is still on the rise and that testing rates are “insufficient” across the continent.

Jason Kindrachuk, Canada research chair in emerging viruses at the University of Manitoba, said donating vaccines, in addition to supporting surveillance and diagnostic tests, is “massively important.”

But Kindrachuk, who has worked on the ground in Congo during the epidemic, also said that the international response to the mpox outbreak is “better late than never (but) better never late.”

“It would have been fantastic for us globally to not be in this position by having provided doses a much, much longer time prior than when we are,” he said, noting that the outbreak of clade I mpox in Congo started in early 2023.

Clade II mpox, endemic in regions of West Africa, came to the world’s attention even earlier — in 2022 — as that strain of virus spread to other countries, including Canada.

Two doses are recommended for mpox vaccination, so the donation may only benefit 100,000 people, Pai said.

Pai questioned whether Canada is contributing enough, as the federal government hasn’t said what percentage of its mpox vaccine stockpile it is donating.

“Small donations are simply not going to help end this crisis. We need to show greater solidarity and support,” he said in an email.

“That is the biggest lesson from the COVID-19 pandemic — our collective safety is tied with that of other nations.”

This report by The Canadian Press was first published Sept. 13, 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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How many Nova Scotians are on the doctor wait-list? Number hit 160,000 in June

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HALIFAX – The Nova Scotia government says it could be months before it reveals how many people are on the wait-list for a family doctor.

The head of the province’s health authority told reporters Wednesday that the government won’t release updated data until the 160,000 people who were on the wait-list in June are contacted to verify whether they still need primary care.

Karen Oldfield said Nova Scotia Health is working on validating the primary care wait-list data before posting new numbers, and that work may take a matter of months. The most recent public wait-list figures are from June 1, when 160,234 people, or about 16 per cent of the population, were on it.

“It’s going to take time to make 160,000 calls,” Oldfield said. “We are not talking weeks, we are talking months.”

The interim CEO and president of Nova Scotia Health said people on the list are being asked where they live, whether they still need a family doctor, and to give an update on their health.

A spokesperson with the province’s Health Department says the government and its health authority are “working hard” to turn the wait-list registry into a useful tool, adding that the data will be shared once it is validated.

Nova Scotia’s NDP are calling on Premier Tim Houston to immediately release statistics on how many people are looking for a family doctor. On Tuesday, the NDP introduced a bill that would require the health minister to make the number public every month.

“It is unacceptable for the list to be more than three months out of date,” NDP Leader Claudia Chender said Tuesday.

Chender said releasing this data regularly is vital so Nova Scotians can track the government’s progress on its main 2021 campaign promise: fixing health care.

The number of people in need of a family doctor has more than doubled between the 2021 summer election campaign and June 2024. Since September 2021 about 300 doctors have been added to the provincial health system, the Health Department said.

“We’ll know if Tim Houston is keeping his 2021 election promise to fix health care when Nova Scotians are attached to primary care,” Chender said.

This report by The Canadian Press was first published Sept. 11, 2024.

The Canadian Press. All rights reserved.

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Newfoundland and Labrador monitoring rise in whooping cough cases: medical officer

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ST. JOHN’S, N.L. – Newfoundland and Labrador‘s chief medical officer is monitoring the rise of whooping cough infections across the province as cases of the highly contagious disease continue to grow across Canada.

Dr. Janice Fitzgerald says that so far this year, the province has recorded 230 confirmed cases of the vaccine-preventable respiratory tract infection, also known as pertussis.

Late last month, Quebec reported more than 11,000 cases during the same time period, while Ontario counted 470 cases, well above the five-year average of 98. In Quebec, the majority of patients are between the ages of 10 and 14.

Meanwhile, New Brunswick has declared a whooping cough outbreak across the province. A total of 141 cases were reported by last month, exceeding the five-year average of 34.

The disease can lead to severe complications among vulnerable populations including infants, who are at the highest risk of suffering from complications like pneumonia and seizures. Symptoms may start with a runny nose, mild fever and cough, then progress to severe coughing accompanied by a distinctive “whooping” sound during inhalation.

“The public, especially pregnant people and those in close contact with infants, are encouraged to be aware of symptoms related to pertussis and to ensure vaccinations are up to date,” Newfoundland and Labrador’s Health Department said in a statement.

Whooping cough can be treated with antibiotics, but vaccination is the most effective way to control the spread of the disease. As a result, the province has expanded immunization efforts this school year. While booster doses are already offered in Grade 9, the vaccine is now being offered to Grade 8 students as well.

Public health officials say whooping cough is a cyclical disease that increases every two to five or six years.

Meanwhile, New Brunswick’s acting chief medical officer of health expects the current case count to get worse before tapering off.

A rise in whooping cough cases has also been reported in the United States and elsewhere. The Pan American Health Organization issued an alert in July encouraging countries to ramp up their surveillance and vaccination coverage.

This report by The Canadian Press was first published Sept. 10, 2024.

The Canadian Press. All rights reserved.

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