Health
Deadly outbreak of Marburg, or ‘bleeding eye virus,’ leads to travel advisory
Health officials continue to monitor an outbreak of Marburg virus — also known as “bleeding eye virus” — in Rwanda, which has sparked concerns about a potential spread outside the country.
The U.S. State Department issued a travel advisory on Nov. 22, recommending that travelers exercise “increased caution” in Rwanda due to the outbreak.
“Travelers may be subject to additional health screenings [when] entering and exiting Rwanda,” the advisory stated.
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What is Marburg virus?
Similar to the Elbola virus, Marburg is a “rare but severe viral hemorrhagic fever” that is highly deadly, according to the Centers for Disease Control and Prevention (CDC). It has a 20% to 90% fatality rate.
Similar to the Elbola virus, Marburg is a “rare but severe viral hemorrhagic fever” that is highly deadly. (iStock)
The first case in Rwanda was confirmed in September. As of Nov. 29, the country had reported 66 cases of the virus and 15 deaths. Most of the infected people have been health care workers.
Approximately 75% of the patients with Marburg have recovered, according to the CDC.
There have not been any confirmed cases in the United States, and the CDC says the risk of infection in the country is low.
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“Marburg is one of the deadliest viruses that infect humans,” Dr. Marc Siegel, senior medical analyst for Fox News and clinical professor of medicine at NYU Langone Medical Center, told Fox News Digital.
“It is very similar to Ebola in that it causes hemorrhagic fever.”
Symptoms of the virus
Initial symptoms usually mimic the flu, including fever, body aches, diarrhea, abdominal pain and vomiting.
The interval between infection and symptoms is typically two to 21 days, according to Siegel.
Dr. Marc Siegel previously spoke to Fox News about the Marburg virus outbreak in Rwanda. (Fox News)
In severe cases, patients may experience extreme weight loss, jaundice, inflammation of the pancreas, delirium, shock, liver failure, massive hemorrhaging and multi-organ dysfunction, the CDC stated.
It can also cause bleeding from the eyes, nose, mouth or gastrointestinal tract, hence the nickname “bleeding eye virus.”
The virus is transmitted via bodily surfaces, blood and contact with contaminated surfaces, according to Siegel.
The “primary reservoir” (natural host) for the virus is the Egyptian rousette bat (Rousettus aegyptiacus), the CDC noted.
The “primary reservoir” (natural host) for the virus is the Egyptian rousette bat (Rousettus aegyptiacus). (Getty Images)
“There are no adequate drugs or vaccines for Marburg,” Siegel told Fox News Digital.
Medical providers can manage symptoms with supportive care, including oxygen, pain medications and IV fluids for rehydration.
“There are other treatments in the works, including an experimental vaccine,” the doctor noted.
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For those who succumb to the disease, death usually occurs within eight to nine days after symptom onset, Siegel said — typically due to blood loss.
Although the doctor said there is a risk of intercontinental spread, he does not believe it is contagious enough for a widespread outbreak.
Prevention of Marburg
To avoid contracting the virus, the CDC has issued the following recommendations on its website.
If there are no more new cases by Dec. 22, 2024, the outbreak in Rwanda will be declared over. (iStock)
- Avoid contact with the blood and bodily fluids of those who are experiencing symptoms.
- Do not touch items that may have come in contact with the bodily fluids of an infected person.
- Avoid contact with Egyptian rousette bats and non-human primates in areas where Marburg cases have been reported.
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In order for a Marburg outbreak to be officially over, there must be a period of 42 days without any new infections after the last recovered patient has had two negative tests 48 hours apart, according to the CDC.
If there are no more new cases by Dec. 22, 2024, the outbreak in Rwanda will be declared over.
Health
Popular weight-loss diet shows surprising impact on serious mental health condition
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The keto diet may help individuals with anorexia nervosa, new research from UC San Diego School of Medicine suggests.
The small study, published in the journal Nature, enrolled 22 women between 18 and 45 years old who had a history of anorexia nervosa and a BMI (body mass index) above 17.5.
Anorexia nervosa (AN) is a severe psychiatric disorder involving food restriction and low body weight, the researchers describe. This is often followed by body dissatisfaction, an intense fear of eating, and a preoccupation with body shape and size even after weight restoration.
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The participants followed a ketogenic therapy plan for 14 weeks, aiming for a diet consisting of 70% fat, 20% protein and 10% carbohydrates, according to a press release.
The participants followed a ketogenic therapy plan for 14 weeks, aiming for a diet consisting of 70% fat, 20% protein and 10% carbohydrates. (iStock)
The goal was to maintain weight while inducing nutritional ketosis — a metabolic state in which the body produces and uses ketones for energy because carbohydrate intake is low enough to shift metabolism toward fat burning.
The researchers monitored the participants via ketone testing, weekly weight checks, symptom questionnaires, and nutritional and psychiatric support.
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Among the remaining 18 participants, eating disorder symptoms reportedly improved in several areas, including restraint, depression scores, and concern with eating, shape and weight.
Overall scores on the Eating Disorder Examination Questionnaire (EDE-Q) also improved, with 72% of participants scoring in the recovered or normal range.
Eating disorder symptoms reportedly improved in several areas, according to the study findings. (iStock)
The participants’ body weight did not change significantly, and no BMI fell below 17.5, according to the results.
Those who continued to follow ketogenic therapy three months after the intervention had slightly better EDE-Q scores.
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The study authors concluded that ketogenic dietary therapy is “well-tolerated” and demonstrated “potential efficacy” in reducing anorexia nervosa symptoms in adults who are mildly underweight or weight-restored.
Although the study was “sufficiently powered,” the authors noted that the small sample size of predominantly White females limits the scope of the findings.
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“Future research should replicate these findings in more diverse populations and incorporate objective assessments of brain function, such as metabolic PET imaging, to assess brain glucose metabolism,” they wrote.
Those who continued to follow ketogenic therapy three months after the intervention had slightly better scores on the Eating Disorder Examination Questionnaire. (iStock)
Lead study author Guido Frank, MD, professor of psychiatry at the UC San Diego School of Medicine, who has studied and treated anorexia patients for more than 25 years, launched this study to broaden treatment options for this high-risk population.
Frank wrote in a statement that new approaches to anorexia nervosa are “urgently” needed.
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“Our work with ketogenic therapy looks beyond standard therapies and potentially at the underlying physiology of the disorder,” he went on.
“Growing evidence links anorexia nervosa to neurometabolic dysfunction, and we are hopeful that direct metabolic intervention can regulate neural function and address the psychological symptoms patients experience.”
Health
New cancer vaccine delivers stunning result against one of the deadliest skin cancers
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A new injectable therapy is showing positive results in reducing melanoma throughout a five-year period.
The personalized mRNA cancer therapy, called intismeran autogene, combined with the cancer immunotherapy drug KEYTRUDA (pembrolizumab), is a collaboration between Merck and Moderna.
The results from the phase 2b KEYNOTE-942 study were presented at the American Society of Clinical Oncology (ASCO) Annual Meeting in Chicago on May 27.
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After about a five-year follow-up, the combo drug was found to reduce the risk of melanoma recurrence or death by 49% compared to pembrolizumab alone.
The researchers analyzed data from 157 patients with high-risk stage 3 and 4 melanoma whose cancer had been removed via surgery. The participants were split into two groups — one received the combo therapy and the other only received pembrolizumab, according to a press release.
The therapy was found to reduce the risk of melanoma recurrence or death by 49% compared to pembrolizumab alone after a five-year follow-up. (iStock)
The findings revealed that the combination group saw benefits that were “sustained and durable over time.”
Intismeran autogene is designed using mutations identified in a patient’s own tumor, with the intention of teaching the immune system what the cancer looks like so that it can recognize and attack it.
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According to the researchers, intismeran is “well-tolerated” with a “manageable” safety profile.
The most commonly cited side effects of the personalized mRNA vaccine plus KEYTRUDA were fatigue, injection-site pain, chills, fever and headache. The researchers reported no new long-term safety concerns and no severe vaccine-related adverse events.
The combination therapy is currently being evaluated in a phase 3 study — the final confirmation stage.
Patients with late-stage melanoma have a “significant risk” of cancer recurrence, according to an expert. (iStock)
In a Merck press release from January, Kyle Holen, MD, Moderna’s senior vice president and head of development, oncology and therapeutics, noted that this data highlights the “potential of a prolonged benefit … in patients with resected high-risk melanoma.”
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“We continue to invest in our platform in oncology because of encouraging outcomes like these, which illustrate mRNA’s potential in cancer care,” he said.
Dr. Marjorie Green, senior vice president and head of oncology, global clinical development at Merck Research Laboratories, also commented that for many patients with stage 3 or 4 melanoma, there is a “significant risk of recurrence following surgery.”
Researchers confirmed that the combination therapy is currently being evaluated in a phase 3 study. (iStock)
“As such, demonstrating the longer-term potential of intismeran autogene and KEYTRUDA to reduce the risk of recurrence for certain patients with melanoma is a meaningful milestone,” she said.
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The company cited encouraging five-year follow-up data and pointed to upcoming late-stage INTerpath trial results with Moderna in several hard-to-treat cancers.
Health
New ways to prevent flu revealed in ‘accidental’ lab breakthrough, study finds
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An accidental lab discovery has opened the door to entirely new ways of preventing the flu.
While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells, SWNS reported.
By targeting the specific molecules the viruses rely on, scientists found that they could block them from entering new cells and halt their replication altogether.
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Researchers say these “fundamental insights” into seasonal influenza highlight a clear path toward developing better preventive medications.
“The hope is that fundamental, curiosity-based research like this helps to pave the way for novel strategies to treat and prevent influenza infections,” principal investigator Dr. Emily Bruce, from the University of Vermont’s Larner College of Medicine, said in the SWNS report.
While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells. (iStock)
While several flu strains cause illness, H1N1 and H3N2 influenza A viruses are the most common. However, current flu tests cannot differentiate between them, and clinical treatments are identical for both.
Although vaccines and antivirals are available, Bruce noted a “dire” need for better medications to stop the virus from spreading cell to xxcell.
“You don’t get sick when a virus is in one cell,” he noted. “You get sick because a virus replicates itself and goes into many more cells.”
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The study, which was published in The Journal of Virology, originally aimed to map how viral RNA segments are transported within cells to create new viral particles.
The team used H1N1 and H3N2 viruses isolated from the nasal passages of positive patients in 2022.
Clinical treatments remain identical for both primary strains of the flu virus. (iStock)
During the investigation, the team unexpectedly stumbled upon a cellular pathway that blocked the virus from entering lung cells, SWNS reported.
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The data revealed that when a specific human protein called Rab11B was depleted, H3N2 viruses failed to enter human lung cells. H1N1 viruses were completely unaffected.
Using reverse genetics, the team mapped this defect and uncovered a brand-new, H3N2-specific role for Rab11B during viral entry.
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This discovery challenged the scientific assumption that all flu viruses enter cells the same way.
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“Viruses are like pirates from different countries hijacking someone’s ship,” Bruce said. “Different viruses, like different types of pirates, use different methods to get onboard.”
This discovery challenged the scientific assumption that all flu viruses enter cells the same way. (iStock)
“We had previously thought that all flu viruses used the same way to get into a cell, but we discovered that this is not true,” she went on. “H1N1 and H3N2 need different proteins to get in, and if you get rid of the right protein, a specific virus can’t get in.”
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While these findings identify a critical cellular pathway for viral entry, the study was conducted using isolated cells, the researchers acknowledged.
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Further research is needed to determine whether blocking the protein is safe and effective within a live, complex human respiratory system.
Bruce and the team hope to conduct further research to determine whether this Rab11B-dependency is a fundamental property of H3N2, or if it’s a trait unique to currently circulating flu strains.
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