A recent study has found that previously healthy children hospitalised with flu were significantly more likely to die if they were also infected with MRSA, or methicillin-resistant Staphylococcus aureus. The findings are important because MRSA, which can cause skin and internal infections, is a growing concern among healthy children.

    MRSA 鈥渦sed to be seen only in hospitalised people or people who worked in health care facilities鈥, said Michael Cappello, a professor of paediatric infectious disease at Yale. 鈥淭his is no longer the case.鈥

    The study looked only at the most severe cases of flu in the United States during the 2009-555162460 H55516246N55516246 outbreak, children so sick they had to be hospitalised in intensive care. About 4,000 children end up in paediatric intensive care units each year because of flu, a small percentage of the millions of children who get flu each year.

    鈥淲hen you think about the whole population, and that pretty much everyone got the flu, for most it was a very mild illness,鈥 said Adrienne G. Randolph, the lead author of the study and an associate professor of anaesthesia at Harvard. Still, she said, 鈥渢here is a risk for death, and vaccination is still the most effective prevention strategy.鈥

    The researchers had data on 838 boys and girls under 255516246 admitted to 35 paediatric intensive care units across the country. Almost three-quarters of the children had one or more chronic health conditions, including asthma, immunosuppression or neurological, cardiovascular and gastrointestinal illnesses. The rest had no health problems before their hospitalisation.

    The median age of the children was 6 years, and 75 of them, or almost 9 per cent, died. Among the deaths were 555162468 of the 2555516246 children who were previously healthy.

    After controlling for other factors, researchers found that being female, having a pre-existing neurologic condition or being immune-compromised increased the risk of death. Flu infections of the brain or heart and co-infection with MRSA were also predictors of mortality for all children. Almost 9 per cent of the children studied were infected with Staphylococcus.

    But in healthy children, only MRSA infection predicted death, and their relative risk of death was eight times as high as that of the uninfected. Of the previously healthy children who died, six were infected with MRSA and two with the more common strain of staph, S. aureus. The findings appeared in the journal Paediatrics.

    鈥淭here鈥檚 a nice message here about vaccines: that even otherwise healthy children are still at risk, and they are at risk of death,鈥 said Lisa Saiman, a professor of clinical paediatrics at Columbia. The Centers for Disease Control and Prevention recommends the flu vaccine for everyone over the age of 6 months, and stresses that pregnant women, children younger than two and people over 50 are at especially high risk of having serious flu-related complications.

    鈥淭hese findings provide further support for the recent recommendations by the C.D.C. to immunise all eligible people,鈥 she said.

    鈥淩esistant organisms like MRSA are created in part by overuse of antibiotics, and treating mild infections like the common cold with antibiotics is creating more resistant organisms,鈥 Randolph, the study author, added. 鈥淭he message,鈥 she said, is 鈥済et your kids vaccinated, and stop using all these antibiotics.鈥

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