CDC 71 new cases of mysterious pediatric hepatitis

Another 71 cases of the mysterious hepatitis have been spotted in the U.S., the Centers for Disease Control and Prevention revealed Wednesday.

No further deaths were reported over the last two weeks, but previously the CDC revealed it was probing five fatalities in the outbreak — with one in Wisconsin

One more child has required a liver transplant, bringing the national tally for patients needing this procedure to 16.

A total of 180 cases of the mysterious hepatitis have now been linked to the outbreak across 36 states and territories in the U.S., with patients around two years old.

This is the most out of any nation in the world with the UK, which first detected the outbreak, having the second-highest total at 163 cases.

The CDC said the ‘vast majority’ of these patients were retrospective, and came to hospitals before May but have only just been diagnosed with the mysterious disease.

Scientists are puzzled as to what is causing the outbreak, but CDC officials say adenoviruses — which can cause the common cold — remain a ‘strong lead’ with nearly half of patients testing positive for them.

Other theories suggest a previous Covid infection, a mutation in adenoviruses or even exposure to pet dogs could be triggering the illness.

All the normal causes of the illness — hepatitis viruses A, B, C, D and E — have been ruled out.

 The above map displays the tally from May 5, the last time the CDC updated the nation on the outbreak. In the two weeks since it has picked up another 71 cases of mysterious hepatitis. It warned most of these were historical

At least 12 children have now died from the mysterious hepatitis worldwide, with five fatalities also reported in Indonesia and one each in Ireland and Palestine.

Today’s announcement by the U.S. takes the global tally to at least 520 cases across 21 countries, mostly among children under 10 years old.

CDC officials said they were continuing to probe all possible causes of the mysterious hepatitis outbreak.

Q&A: What is the mysterious global hepatitis outbreak and what is behind it? 

What is hepatitis?

Hepatitis is inflammation of the liver that is usually caused by a viral infection or liver damage from drinking alcohol. 

Some cases resolve themselves, with no ongoing issues, but a fraction can be deadly, forcing patients to need liver transplants to survive.

What are the symptoms?

People who have hepatitis generally have fatigue, loss of appetite, nausea, vomiting, abdominal pain, dark urine, light-colored stools and joint pain.

They may also suffer from jaundice — when the skin and whites of the eyes turn yellow. 

Why are experts concerned?

Hepatitis is usually rare in children, but experts have already spotted more cases in the current outbreak than they would normally expect in a year.

Cases are of an ‘unknown origin’ and are also severe, according to the World Health Organization. 

What are the top theories? 


Experts say the cases may be linked to adenovirus, commonly associated with colds, but further research is ongoing.

This, in combination with Covid infections, could be causing the spike in cases. 

Around three-quarters of British cases have tested positive for the virus. 

Weakened immunity

British experts tasked with investigating the spate of illnesses believe the endless cycle of lockdowns may have played a contributing role.

Restrictions may have weakened children’s immunity because of reduced social mixing, leaving them at heightened risk of adenovirus. 

This means even ‘normal’ adenovirus could be causing the severe outcomes, because children are not responding to it how they did in the past. 

Adenovirus mutation

Other scientists said it may have been the adenovirus that has acquired ‘unusual mutations’.

This would mean it could be more transmissible or better able to get around children’s natural immunity.

New Covid variant

UKHSA officials included ‘a new variant of SARS-CoV-2’ in their working hypotheses.

Covid has caused liver inflammation in very rare cases during the pandemic, although these have been across all ages rather than isolated in children. 

Environmental triggers  

The CDC has noted environmental triggers are still being probed as possible causes of the illnesses. 

These could include pollution or exposure to particular drugs or toxins.

They did not reveal which 36 states and territories had confirmed or suspected cases of the disease that were being probed.

But in a previous release they said that 24 states had detected hepatitis following had detected hepatitis.

These were: Alabama, Arizona, California, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Louisiana, Michigan, Minnesota, Missouri, North Carolina, North Dakota, Nebraska, New York, Ohio, Pennsylvania, Tennessee, Texas, Washington and Wisconsin.

Puerto Rico was also reported at the time to have at least one case of the condition.

In the two weeks since the update, both Hawaii and Massachusetts have revealed they are also probing hepatitis cases. It is not clear if these have been included in the national list.

The CDC added: ‘It’s important to note that severe hepatitis in children remains rare.

‘However, we encourage parents and caregivers to be aware of the symptoms of hepatitis — particularly jaundice, which is a yellowing of the skin or eyes — and to contact their child’s healthcare provider with any concerns’. 

Last week a top scientist warned the outbreak would continue ‘throughout the summer’ and that many cases were going undiagnosed.

Dr Matthew Binnicker, the director of clinical virology at the Mayo Clinic in Minnesota, told DailyMail.com that cases will continue to crop up because transmission of adenoviruses — the main suspect — tends ‘not to be seasonal’.

He warned schools and daycare centers — where children mix — were major hubs for spreading the virus.

Adenoviruses can be transmitted by touching feces-contaminated surfaces.

Speaking exclusively to DailyMail.com, Dr Binnicker said: ‘I would not be comfortable saying this outbreak has peaked.

‘I’d say cases will continue to emerge throughout the summer period because we will continue to see children in day care where there is higher transmission.

‘This type of adenovirus we don’t tend to think of as seasonal, we will continue to see cases throughout the year.’

The adenovirus children with mysterious hepatitis are most likely to have tested positive for is scientifically named type 41.

This infects the gastric system, sparking symptoms including diarrhea and vomiting.

It is spread via the fecal-oral route, or when someone touches a surface contaminated with feces and later touches their own mouth.

Asked whether many more cases would be spotted in the U.S. last week, Binnicker warned many were likely still to be diagnosed because they were more mild.

‘Hepatitis can occur on a sliding scale of causing an individual to be hospitalized to the other end where it is much more mild,’ he said.

‘In [the mild] cases, it may not prompt parents to take their child for investigation, or to the hospital.

‘Many of these children will experience gastroenteritis symptoms such as vomiting, diarrhea and nausea, with some also facing an upper respiratory illness so a cough or sore throat that’s preceding hepatitis.

‘Those who then develop hepatitis will see changes in skin color, so some develop symptoms of jaundice or yellowing of the skin… ranging from very very noticeable to very very subtle changes.

‘A yellowing white of the eye is also something that is very apparent and parents get very shocked some times, but other times it is very very subtle and may not be noticed.’

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