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‘Dealing With A Different Beast’: Why Delta Has Doctors Worried

'Dealing With A Different Beast': Why Delta Has Doctors Worried

Catherine O’Neal, MD, an infectious disease physician, took to the podium of the Louisiana governor’s press conference on July 16 and did not mince words.

“The delta variant is not last year’s virus, and it’s become incredibly apparent to healthcare workers that we are dealing with a different beast,” she said.

Louisiana has one of the least vaccinated states in the country. In the United States as a whole, 48.6% of the population is fully vaccinated. In Louisiana, it’s just 36%, and delta is bearing down.

O’Neal spoke about the pressure rising COVID cases were already putting on her hospital, Our Lady of the Lake Regional Health System, in Baton Rouge. She talked about watching her peers, 30 and 40-year-olds become severely ill with the latest iteration of the new coronavirus—the delta variant—which is sweeping through the US with astonishing speed, causing new cases, hospitalizations, and deaths to rise again. 

O’Neal talked about parents who might not be alive to see their children go off to college in a few weeks.  She talked about increasing hospital admissions for infected kids and pregnant women on ventilators.

“I want to be clear after seeing what we’ve seen the last two weeks. We only have two choices: We are either going to get vaccinated and end the pandemic, or we’re going to accept death and a lot of it,” O’Neal said, her voice choked by emotion.

Where Delta Goes, Death Follows

Delta was first identified in India, where it caused a devastating surge in the spring, In a population that was largely unvaccinated, researchers think it may have caused as many as 3 million deaths. In just a few months’ time, it has sped across the globe.

Research from the UK shows that delta is highly contagious. It’s about 60% more easily passed from person-to-person than the alpha version (or B.1.1.7, which was first identified in the UK). 

Where a single infected person might have spread older versions of the virus to 2 or 3 others, mathematician and epidemiologist Adam Kucharski, PhD, an associate professor at the London School of Hygiene and Tropical Medicine, thinks that number—called the basic reproduction number– might be around 6 for delta, meaning that on average, each infected person spreads the virus to 6 others.

“The delta variant is the most able and fastest and fittest of those viruses,” said  Mike Ryan, MD, MPH, executive director of the World Health Organization’s health emergencies program, in a recent press briefing. Early evidence suggests it may also cause more severe disease in people who are not vaccinated. 

“There’s clearly increased risk of ICU admission, hospitalization, and death,” said Ashleigh Tuite, PhD, an infectious disease epidemiologist at the University of Toronto in Ontario.

In a study published ahead of peer review, Tuite and her co-author, David Fisman, PhD, reviewed the health outcomes for more than 200,000 people who tested positive for SARS-CoV2 in Ontario between February and June of 2021. Starting in February, Ontario began screening all positive COVID tests for mutations in the N501Y region for signs of mutation.

Compared to versions of the coronavirus that circulated in 2020, having an alpha, beta, or gamma variant, modestly increased the odds that an infected person would become sicker.  The delta variant raised the risk even higher, more than doubling the odds that an infected person would need to be hospitalized or could die from their infection.

Emerging evidence from England and Scotland, analyzed by Public Health England, also show an increased risk for hospitalization with delta. The increases are in line with the Canadian data.  Experts caution that the picture may change over time as more evidence is gathered.

“What is causing that? We don’t know,” Tuite said.

Enhanced Virus

The delta variants (there’s actually more than one in the same viral family), have about 15 different mutations compared to the original virus. Two of these, L452R and E484Q, are mutations to the spike protein that were first flagged as problematic in other variants because they appear to help the virus escape the antibodies we make to fight it.

It has another mutation away from its binding site that’s also getting researchers’ attention – P681R.

This mutation appears to enhance the “springiness” of the parts of the virus that dock onto our cells, said Alexander Greninger, MD, PhD, assistant director of the UW Medicine Clinical Virology Laboratory at the University of Washington in Seattle.  So it’s more likely to be in the right position to infect your cells if you come into contact with it.

Another theory is that P681R may also enhance the virus’s ability to fuse cells together into clumps that have several different nuclei. These balls of fused cells are called syncytia.

“So it turns into a big factory for making viruses,” said Kamron Kadkhoda, PhD, medical director of immunopathology at the Cleveland Clinic, in Ohio.

This capability is not unique to delta or even to the new coronavirus.  Earlier versions and other viruses can do the same thing, but according to a recent paper in Nature, the syncytia that delta creates are larger than the ones created by previous variants.

Scientists aren’t sure what these supersized syncytia mean, exactly, but they have some theories. They may help the virus to copy itself more quickly, so a person’s viral load builds up quickly. That may enhance the ability of the virus to transmit from person to person.

And at least one recent study from China supports this idea. That study, which was posted ahead of peer review on the website Virological.org, tracked 167 people infected with delta back to a single index case. 

China has used extensive contact tracing to identify people that may have been exposed to the virus and sequester them quickly to tamp down its spread. Once a person is isolated or quarantined, they are tested daily with gold-standard PCR testing to determine whether or not they were infected. 

Researchers compared delta cases to the characteristics of people infected in 2020 with previous versions of the virus.

This study found that people infected by delta tested positive more quickly than their predecessors did. In 2020, it took an average of 6 days for someone to test positive after an exposure. With delta, it took an average of about 4 days. 

When people tested positive, they had more than 1000 times more virus in their bodies, suggesting the delta variant has a higher growth rate in the body.

This gives delta a big advantage. According to Angie Rassumussen, PhD, a virologist at the Vaccine and Infectious Disease Center at the University of Saskatchewan, in Canada, who posted a thread about the study on Twitter, if people are shedding 1000 times more virus, it’s much more likely that close contacts will be exposed to enough of itto become infected themselves.

And if they’re shedding earlier in the course of their infections, the virus has more opportunity to spread.

This may help explain why delta is so much more contagious.

Beyond transmission, delta’s ability to form syncytia may have two other important consequences.  It may help the virus hide from our immune system, and it may make the virus more damaging to the body.

Commonly, when a virus infects a cell, it will corrupt the cell’s protein making machinery to crank out more copies of itself. When the cell dies, these new copies are released into the plasma outside the cell where they can float over and infect new cells. It’s in this extracellular space where a virus can also be attacked by the antibodies our immune system makes to fight it off.

“Antibodies don’t penetrate inside the cell. If these viruses are going from one cell to another by just fusing to each other, antibodies become less useful,” Kadkhoda said.

Escape Artist

Recent studies show that delta is also able to escape antibodies made in response to vaccination more effectively than the Alpha, or B.1.1.7 strain.  The effect was more pronounced in older adults, who tend to have weaker responses to vaccines in general.

This evasion of the immune system is particularly problematic for people who are only partially vaccinated.  Data from the UK show that a single dose of vaccine is only about 31% effective at preventing illness with delta, and 75% effective at preventing hospitalization. 

After two doses, the vaccines are still highly effective—even against delta—reaching 80% protection for illness, and 94% for hospitalization, which is why US officials are begging people to get both doses of their shots, and do it as quickly as possible.

Finally, the virus’s ability form syncytia may leave greater damage behind in the body’s tissues and organs.

“Especially in the lungs,” Kadkhoda said.  The lungs are very fragile tissues. Their tiny air sacs—the aveoli–are only a single cell thick.  They have to be very thin to exchange oxygen in the blood.

“Any damage like that can severely affect any oxygen exchange and the normal housekeeping activities of that tissue,” he said. “In those vital organs, it may be very problematic.”

The research is still early, but studies in animals and cell lines are backing up what doctors say they are seeing in hospitalized patients.

 A recent preprint study from researchers in Japan, found that hamsters infected with delta lost more weight—a proxy for how sick they were—compared to hamsters infected with an older version of the virus.  The researchers attribute this to the viruses’ ability to fuse cells together to form syncytia.

Another investigation, from researchers in India, infected two groups of hamsters—one with the original “wild type” strain of the virus, the other with the delta variant of the new coronavirus. 

As in the Japanese study, the hamsters infected with delta lost more weight.  When the researchers performed necropsies on the animals, they found more lung damage and bleeding in hamsters infected with delta. This study was also posted as a preprint ahead of peer review.

German researchers working with pseudotyped versions of the new coronavirus—viruses that have been genetically changed to make them safer to work with—watched what happened after they used these pseudoviruses to infect lung, colon, and kidney cells in the lab.

They, too, found cells infected with the delta variant formed more and larger syncytia compared to cells infected with the wild type strain of the virus. The authors write that their findings suggest delta could “cause more tissue damage, and thus be more pathogenic, than previous variants”.”

Researchers say it’s important to remember that while interesting, this research isn’t conclusive. Hamsters and cells aren’t humans.  More studies are needed to prove these theories.

Scientists say what we already know about delta makes vaccination more important than ever.

 “The net effect is really that, you know, this is worrisome in people who are unvaccinated and then people who have breakthrough infections, but it’s not …’ a reason to panic or to throw up our hands and say you know, this pandemic is never going to end,” Tuite said, “Because what we do see is that the vaccines continue to be highly protective.”

Follow me on Twitter: @ReporterGoodman

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This post originally posted here Medscape Medical News

Big cat ‘sighting’: CCTV captures suspected beast ‘walking like a lion’ several times

Big cat 'sighting': CCTV captures suspected beast 'walking like a lion' several times

Housing manager Pauline Jones told The Leader she watched the footage several times on her laptop.

She insisted the creature, which she describes as “walking like a lion”, is too big to be a domestic cat.

She told the outlet: “It’s quite difficult because the camera that it is on has mesh around it.

“At first I couldn’t make out what it was so I transferred it from my phone to my laptop.

“I thought there’s no way that’s a cat, it must be somebody’s dog – but if you look at its tail and the way it is walking there is no way it is a dog.

“When you look at him or her walking it has a different gait to a domestic cat, the way it lifts its paws is more like a dog, they are bigger and heavier.”

Author: Dylan Donnelly
Read more here >>> Daily Express :: Weird Feed

Big 'cat' spotted: 'Jet black' beast sighting at train station in new suspected encounter

Big 'cat' spotted: 'Jet black' beast sighting at train station in new suspected encounter

Cathy Fox claimed she saw the big cat in Prestatyn, North Wales on May 1. She was in the passenger seat of a car when she saw a creature with “small ears and a long tail” lurking in the bushes near the railway line.

Ms Fox described the creature she spotted as a “jet black, huge, cat-like animal”, according to the Rhyl Journal.

She reported the sighting to Puma Watch North Wales, and said: “I was in Prestatyn on Saturday afternoon and saw a jet black huge cat-like animal, small ears long tail, in the growth at the side of the train tracks.

“It was at Prestatyn train station I was a passenger in the car as we drove over the bridge over the tracks I saw it in the undergrowth.

“I’ve reported it to the police.”

READ MORE: Big cat spotted in North Wales before sprinting off

It marks the latest suspected big cat sighting in North Wales. Earlier this month, a couple said they saw a creature running alongside the A5104 near Llandegla.

Alexandra Williams said she and her husband saw a “huge black cat running across a field” while driving into Llandegla from Flintshire.

She added: “It was definitely a big cat and we can only assume it was a puma.”

In April, there were four separate sightings of a creature described as a big cat along the A5 between Chirk and Oswestry.

Tony Jones, founder of Puma Watch North Wales, told the Rhyl Journal he had asked police to confirm the report.

Tony said: “Earlier this year, footprints of a suspected big cat were found in nearby Dyserth and also in hills above Meliden. There have also been multiple sightings a few miles along the coast in the Talacre area.

“Big cats such as pumas are solitary with a hunting range of dozens of miles.

“They’re mostly spotted in Snowdonia and the Clwydian hills but reports of sightings in urban locations some distance from these areas are becoming more frequent.”

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This post originally appeared on Daily Express :: Weird Feed

Big cat 'sighting': Fisherman stunned by suspected beast roaming near lake

Big cat 'sighting': Fisherman stunned by suspected beast roaming near lake

Mr Johnson admitted his pictures of the animal weren’t the clearest, but was stunned at the size of the suspected big cat.

He said: “I work building fences and that, so going by the picture I can make an estimate of its size.

“I would say it was not quite a metre long. I did think it was quite random when I saw it.

“It went and sat down and was quite chilled out for about ten minutes before it went down the track.

“I was not scared of it, but I would not exactly have walked up to it either.”

Author:
This post originally appeared on Daily Express :: Weird Feed

Next James Bond: Beauty and the Beast star discusses 007 role – 'It's daunting'

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This post originally appeared on Daily Express :: Entertainment Feed

Next James Bond: Beauty and the Beast star discusses 007 role - 'It's daunting'
Later this year No Time To Die will hit cinemas, bringing Craig’s journey as James Bond to an end. The British star has played the hero in five movies spanning 15 years, but now all eyes are on who could replace him. While a collection of British actors have been at the top of bookies’ rankings, Disney star Luke Evans has now announced he would love to take on the “daunting” task.
The Welsh actor is best known for portraying Gaston in the live-action remake of Beauty and the Beast, but he has been around as a big-screen actor for years.

Before his Disney appearance Luke played Dracula in Dracula Untold and the powerful Bard in Lord of the Rings’ The Hobbit prequels.

The actor, who is also a well-regarded singer, became a mainstay in multi-billion-dollar franchise Fast and the Furious as Owen Shaw, the younger brother of Deckard Shaw (Jason Statham).

Speaking to The Mirror about wanting to take on the iconic role of Bond the 42-year-old said: “I think I’ve cut my teeth very well in movies I’ve done and I’ve enjoyed every second of it. It’s a phenomenal job, a phenomenal franchise, an incredible role.”

READ MORE: James Bond ‘leak’: Daniel Craig’s last expensive 007 premiere detailed

Luke continued: “I have to say though, it’s a daunting task for any actor to play the role after Daniel Craig. No one knows what’s happening.

“It’s a very secretive process and it’s a wonderful role. I would jump at the chance, as would many actors in my position, so we shall see.

“It will be an exciting casting moment for the Bond production and I wish whoever gets it the best of luck.”

However, if he were to get the role, Luke would have to make some sacrifices.

Ladbrokes revealed the actor’s odds have been slashed to just 22/1 to replace Craig after No Time To Die.

The bookies’ Alex Apati commented: “Luke Evans has thrown his hat into the ring to play Bond next and while he’s still considered something of an outsider, his odds have tumbled substantially from 50/1 to just 22/1 in the last two days.”

Although Luke’s new odds are great for him, he is still nowhere near the top of the leaderboard.

Netflix and Bridgerton star Regé-Jean Page is the frontrunner to take over with his odds at Evens.

Page is shortly followed by The Dark Knight Rises and Inception actor Tom Hardy, who has a staggering 3/1 to take the role.

Close behind is James Norton, who has an impressive 4/1.

DC Comics star Henry Cavill is the next in line with 8/1, although his chances have been dwindling slowly over the last few months.

James Bond No Time To Die is due for release on September 30, 2021.

Beauty and the Beast is available to watch on Disney Plus now. 

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