IN PHOTOS Northern lights dance across the night sky in southern Ont.
From London, to Mildmay, Collingwood and St. Thomas, here are some highlights of Friday night and Saturday morning's northern lights display.
Canada plans to start testing wastewater in a number of cities for poliovirus following new reports of cases abroad, the Public Health Agency of Canada confirmed on Friday.
Although Canada has been polio-free since 1994 – thanks to uptake of the polio vaccine – PHAC warns it could return, since it is still circulating in other countries.
New York State confirmed a single case of polio on July 21, and the Associated Press reported on Friday that the virus that causes the highly transmissible paralytic disease has been detected in New York City’s wastewater.
In a statement emailed to CTVNews.ca on Friday, the Public Health Agency of Canada said it is aware of the confirmed case in New York, and that it plans to launch a wastewater testing initiative in Canada “as soon as possible.” So far, no recent cases of polio have been detected in Canada.
“PHAC has been communicating with national and international partners who are experts in this field to finalize a wastewater testing strategy,” the agency wrote, adding it will also begin testing wastewater samples collected earlier this year from key high-risk communities to determine if polio was present in Canada prior to the reported international cases.
“PHAC will also be sending samples to the U.S. Centers for Disease Control and Prevention for additional confirmation,” the agency wrote. It did not say when or where testing will take place.
Polio is often asymptomatic, but in some cases, the viral infection can lead to paralysis or death.
Since wastewater analysis can detect the presence of viruses in a community where asymptomatic cases might otherwise evade clinical detection, environmental scientist Mike McKay said it could be a valuable tool to public health agencies watching to see if the virus returns to Canada.
McKay is executive director of the University of Windsor’s Great Lakes Institute for Environmental Research. He leads a team that has analyzed wastewater samples from Windsor, Leamington, Amherstburg, Lakeshore, London, Sault Ste. Marie, North Bay and Thunder Bay throughout the pandemic. While wastewater analysis was used to monitor drug use in Canada prior to the pandemic, it was only with the arrival of COVID-19 that scientists like McKay first began using it to track the spread of viruses.
"Wastewater has been underutilized, overlooked for so long, and realizing what a potential resource it can be to aid our understanding of disease transmission through communities is exciting," McKay told CTVNews.ca in an interview Friday.
Following the successful use of wastewater testing to track COVID-19, McKay said some of his colleagues at other institutions throughout Ontario have already begun using it to monitor for diseases like influenza and monkeypox.
“Recognizing its broader application to public health is really exciting, and we're happy to be able to participate and help public health units in responding to COVID-19, and hopefully future outbreaks,” he said.
Nonetheless, PHAC warned that accurately testing wastewater for poliovirus is a developing, and imperfect, science. For example, wastewater detections can be affected by extreme precipitation events, such as flooding in a community.
The agency said it’s important that children are fully immunized and up-to-date on their boosters, as countries where the virus isn’t normally found – such as the United Kingdom, Israel and the U.S. – report new cases.
“While the general risk to the Canadian public from polio remains low, these international cases are a good reminder to stay up-to-date with vaccinations, even for rare vaccine-preventable diseases,” the agency wrote.
From London, to Mildmay, Collingwood and St. Thomas, here are some highlights of Friday night and Saturday morning's northern lights display.
For decades, North Bay, Ontario's water supply has harboured chemicals associated with liver and developmental issues, cancer and complications with pregnancy. It's far from the only city with that problem.
The Netherlands' contestant in the Eurovision Song Contest was dramatically expelled from competition hours before Saturday's final of the pan-continental pop competition, which has been rattled by protests over the participation of Israel.
The rolling hills leading to the hamlet of Rosebud are dotted with sprawling farms and cattle pastures -- and a sign sporting a simple message: No Race Track.
Biden wants the 2024 election to be a referendum on Trump's record and plans, but he also wants voters to look favourably on his own policies and actions
Evan Bouchard scored 5:38 into overtime and the Edmonton Oilers bounced back for a 4-3 win over the Vancouver Canucks in the second round of the Stanley Cup playoffs on Friday.
Irresponsibly using a credit card can land you in financial trouble, but personal finance columnist Christopher Liew says when used properly, it can be a powerful wealth-building tool that can help grow your credit profile and create new opportunities.
An evacuation alert was issued for two Wood Buffalo communities Friday night, as crews battled an out-of-control wildfire near Fort McMurray.
A cyclist turned herself in and received a fine after striking a four-year-old girl who was crossing the street to catch a school bus.
A family of fifth generation farmers from Ituna, Sask. are trying to find answers after discovering several strange objects lying on their land.
A Listowel, Ont. man, drafted by the Hamilton Tigercats last week, is also getting looks from the NFL, despite only playing 27 games of football in his life.
A small Ajax dessert shop that recently received a glowing review from celebrity food critic Keith Lee is being forced to move after a zoning complaint was made following the social media influencer’s visit last month.
The Canada Science and Technology Museum is inviting visitors to explore their poop. A new exhibition opens at the Ottawa museum on Friday called, 'Oh Crap! Rethinking human waste.'
The Regina Police Service says it is the first in Saskatchewan and possibly Canada to implement new technology in its detention facility that will offer real-time monitoring of detainees’ vital health metrics.
The stakes have been set for a bet between Vancouver and Edmonton's mayors on who will win Round 2 of the Stanley Cup playoffs.
A grieving mother is hosting a helmet drive in the hopes of protecting children on Manitoba First Nations from a similar tragedy that killed her daughter.
A chicken farmer near Mattawa made an 'eggstraordinary' find Friday morning when she discovered one of her hens laid an egg close to three times the size of an average large chicken egg.
A P.E.I. lighthouse and a New Brunswick river are being honoured in a Canada Post series.