Asthma a significant risk factor for complications in children with H1N1November 20, 2009A new study on pediatric H1N1 influenza admissions has found that asthma is a significant risk factor for severe disease in children with pandemic H1N1 compared with the seasonal flu. The study (http://www.cmaj.ca/cgi/rapidpdf/cmaj.091724), led by researchers from The Hospital for Sick Children (SickKids) in Toronto, Ontario, is published online today in CMAJ (Canadian Medical Association Journal) www.cmaj.ca. This is the second largest study on the topic published to date. It looked at the charts of 58 children admitted to SickKids between May 8 and July 22, 2009 and compared them to 200 children admitted with seasonal influenza between 2004 and 2009. Every year, the hospital admits about 40 children under 18 years of age with seasonal influenza. Twenty-two per cent of children admitted with H1N1 had asthma compared with 6% of those admitted with seasonal influenza. Asthma was determined as a prior diagnosis of asthma or reactive airways disease, or a history of wheeze with the use of inhalers. Almost half of all admissions to the ICU for H1N1 influenza were children with asthma. The children with H1N1 influenza were older than those admitted for seasonal flu, with significantly more over the age of 5 years. Many children (49 or 84%) presented with fever and cough, with or without additional symptoms and 37% (21 children) had gastrointestinal symptoms such as vomiting and/or diarrhea. The median duration of hospital stay for both H1N1 and seasonal influenza was 4 days. "The most striking finding in our study was the high prevalence of asthma among children admitted with pandemic H1N1 influenza compared with those admitted in previous influenza seasons," write Dr. Upton Allen from The Hospital for Sick Children and coauthors. "Asthma has been identified as a significant risk factor for admission with pandemic H1N1 influenza, present in 21%-30% in the larger samples." None of the children admitted with pandemic influenza died compared with 1 death (0.4%) over 5 years in those admitted for seasonal influenza. Principal investigator Dr. Dat Tran and co-authors found that severity of asthma was broad and that children with mild asthma were also at risk. They conclude that children with mild asthma should be vaccinated for H1N1 and considered for antiviral therapy. Canadian Medical Association Journal |
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| Related H1N1 Current Events and H1N1 News Articles Nearly half of Americans believe H1N1 outbreak is over, poll finds The latest poll from researchers at the Harvard School of Public Health (HSPH) shows that almost half of Americans believe the H1N1 flu outbreak is over (44%), and levels of concern about getting sick with the virus continue to decline. Few (18%) think it is "very likely" there will be another widespread outbreak of the H1N1 virus in the U.S. during the next 12 months, although a larger share of the population (43%) does say such an outbreak is "somewhat likely." Iowa State, Ames Lab chemists discover how antiviral drugs bind to and block flu virus Antiviral drugs block influenza A viruses from reproducing and spreading by attaching to a site within a proton channel necessary for the virus to infect healthy cells, according to a research project led by Iowa State University's Mei Hong and published in the Feb. 4 issue of the journal Nature. Flu vaccination rate at BJC HealthCare rises dramatically due to mandatory policy Making flu shots mandatory in 2008 dramatically increased the vaccination rate among St. Louis-based BJC HealthCare's nearly 26,000 employees to more than 98 percent, according to a report now online in the journal Clinical Infectious Diseases. Targeted Prevention Measures Stopped Spread of H1N1 Flu at Alabama Boys Camp, UAB Doctor Says Providing preventive Tamiflu and educating and emphasizing the need for repeated hand sanitizer use and disinfectant spray helped stop the spread of H1N1 influenza at a boys' summer camp in northern Alabama, according the co-director of the University of Alabama at Birmingham (UAB) Division of Pediatric Infectious Diseases. Preventive program associated with reduced spread of H1N1 at summer camp A targeted program of preventive antiviral medication, combined with the use of hand sanitizers and surface decontamination, was associated with containing the spread of the H1N1 virus in a summer camp setting. Of swine, birds and men -- pandemic H1N1 flu Current research suggests that pandemic H1N1 influenza of swine origin has distinct means of transmission from the seasonal flu, yet does not result in the pathogenic severity of avian flu viruses. Study Finds Face Masks and Hand Hygiene Can Help Limit Influenza's Spread Ordinary face masks and hand hygiene can effectively reduce the transmission of influenza-like illness during flu season. Disease severity in H1N1 patients A new study published in CMAJ (Canadian Medical Association Journal) http://www.cmaj.ca/cgi/doi/10.1503/cmaj.091884 concerning the severity of H1N1 influenza has found that admissions to an intensive care unit (ICU) were associated with a longer interval between symptom onset and treatment with antivirals and with presence of an underlying medical condition. Toward a less expensive version of the anti-flu drug Tamiflu Scientists have developed an alternative method for producing the active ingredient in Tamiflu®, the mainstay for fighting H1N1 and other forms of influenza. Early lessons from the H1N1 pandemic: Critical illness in children unpredictable but survivable Lessons learned from the first 13 children at Johns Hopkins Children's Center to become critically ill from the H1N1 virus show that although all patients survived, serious complications developed quickly, unpredictably, with great variations from patient to patient and with serious need for vigilant monitoring and quick treatment adjustments. More H1N1 Current Events and H1N1 News Articles |
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