'Silent epidemic' of SARS-CoV-2 in white-tailed deer raises concerns - Digital Journal | Canada News Media
Connect with us

Health

'Silent epidemic' of SARS-CoV-2 in white-tailed deer raises concerns – Digital Journal

Published

 on


White-tailed 4-pointer Buck checking out the neighborhood in Missoula, Montana in October 2015.
Source – Gu3ree (CC BY-SA 4.0)

Scientists have recently discovered what they are calling a silent epidemic of coronavirus among North America’s most ubiquitous species – the white-tailed deer. 

This raises the possibility of new variants of SARS-CoV-2 emerging in these deer populations. If a new variant were to emerge, it could potentially pose a risk to humans.

There are an estimated 30 million white-tailed deer in the U.S. and since the start of the COVID-19 pandemic in the United States back in 2020, experts were aware that the coronavirus is a zoonotic disease. This means it first emerged in animals, although researchers are not sure precisely which species it originated, and it could spread back to animals.

Researchers have found evidence in experimental studies that ferrets, hamsters, cats, primates, bats, and mink can acquire SARS-CoV-2 infections. After first erupting in April 2020, the coronavirus spread among captive minks in Europe, and by June of 2021, scientists estimated, the virus had infected as many as seven million mink on more than 400 farms in Europe and North America, killing more than 700,000 of the animals

But of even more interest to scientists is the spread of the coronavirus among free-ranging deer, which display few signs of illness, are tricky to detect, and difficult to contain. 

The research on white-tail deer, which appears in the Proceedings of the National Academy of Sciences of the United States of America, raises the possibility of new variants of SARS-CoV-2 emerging in these deer populations. If a new variant were to emerge, it could potentially pose a risk to humans.

This is a significant finding in the research because adaptation in animals is one route by which new variants are likely to emerge.

“This is a top concern right now for the United States,” said Dr. Casey Barton Behravesh, who directs the One Health Office — which focuses on connections between human, animal, and environmental health — at the Centers for Disease Control and Prevention.

“If deer were to become established as a North American wildlife reservoir, and we do think they’re at risk of that, there are real concerns for the health of other wildlife species, livestock, pets, and even people,” she added.

Both white-tailed deer and mule deer are found on Rocky Mountain Arsenal National Wildlife Refuge. White-tailed deer can be distinguished by the large white patch underneath their tails.
Source – USFWS Mountain-Prairie/ Rich Keen / DPRA (CC BY 2.0)

Researchers weren’t looking for COVID

Medical News Today spoke with Dr. Suresh V. Kuchipudi, Dorothy Foehr Huck, and J. Lloyd Huck, Chair in Emerging Infectious Diseases at Penn State University, Pennsylvania. Dr. Kuchipudi is the corresponding author of the present study.

Many of the white-tail deer first tested for the coronavirus were actually being tested for chronic wasting disease (CWD). But the researchers also took the samples and tested them to see if deer had gotten COVID, and when.

CWD is a fatal, neurological illness occurring in North American cervids (members of the deer family), including white-tailed deer, mule deer, elk, and moose. Since its discovery in 1967, CWD has spread to 23 states and two Canadian provinces. CWD is contagious; it can be transmitted freely within and among cervid populations. No treatments or vaccines are currently available.

Scientists have been tracking the spread of CWD through retropharyngeal lymph node samples of deer brought down by hunters or killed in road accidents.

“Earlier studies showed the susceptibility of white-tailed deer to experimental SARS-CoV-2 infection and antibody evidence of SARS-CoV-2 disease in wild deer in multiple states of the U.S. Therefore, we did this study in collaboration with the Department of Natural Resources in Iowa to detect SARS-CoV-2 RNA in deer tissues, confirming the SARS-CoV-2 infection of deer in natural settings.”

The study ended up collecting over 2,000 lymph node samples, of which 1,200 were positive. The researchers looked at the types of variants found in the samples and cross-referenced these with known outbreaks of the variants in humans.

According to this information, the researchers believe that multiple transmissions from humans to deer were occurring and that deer were then transmitting the virus to other deer.

 Dr. Kuchipudi points out that this finding is a problem because the deer could function as a reservoir for the virus, giving it space to mutate.

“Continued circulation of an RNA virus, such as SARS-CoV-2, in humans or nonanimal hosts could lead to novel variant emergence. It is possible that such novel variants could be more transmissible and potentially cause more severe diseases in humans and animals,” said Dr. Kuchipudi.

“In addition, novel variants emerging from an animal reservoir could escape the protection afforded by the current human COVID-19 vaccines.”

Adblock test (Why?)



Source link

Continue Reading

Health

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

Published

 on

 

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.

Source link

Continue Reading

Health

How many Nova Scotians are on the doctor wait-list? Number hit 160,000 in June

Published

 on

 

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.

Source link

Continue Reading

Health

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

Published

 on

 

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.

Source link

Continue Reading

Trending

Exit mobile version