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Staphylococcus aureus

Hello, my 6 month old daughter has cystic fibrosis and has already Staphylococcus aureus (10 000/ml) in her sputum. Is it serious? Isn't it too early? No treatment has been done at the moment but I'm worried ... Thank you for your response.
The methicillin-sensitive Staphylococcus aureus is a common bacterium found in the sputum culture of young people with cystic fibrosis.
In France, the national registry data for cystic fibrosis in 2010 shows that Staphylococcus aureus has been identified at least once in the year for 72% of children, including the children from 0 to 4 years old.
It is a germ widespread in the environment, including humans, whether sick or healthy carrier.
In cystic fibrosis, there is no consensus on the treatment of this germ. There are different approaches: oral antibiotics for 15 days is often proposed; others treat only the symptomatic patients. In some countries, anti-staphylococcic prophylaxis is proposed for young children, but the long-term benefit is uncertain.
For your daughter, you should discuss the need for antibiotic treatment or not with her doctor so he can explain you the reasons of his decision.
Dr Michèle Gérardin