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Pus in sputum but no infection?
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Pus in sputum but no infection?

Hello.

I am a 25 year old female with severe brittle asthma and CVID (a primary immunodeficiency), only diagnosed after finding early signs of bronchiectasis on my CT scan. I am now receiving IVIG to treat the immune problem, and I am on continuous antibiotics to try and limit the number of infections I get. Because I am dependent on high doses of oral steroids to stabilise my asthma, serious infections have been a severe problem in the past.

I send sputum samples into the hospital once a month to try and detect any bugs as soon as they start. Recently all the samples have been negative, which obviously I am very pleased about. However, they do all record 'Mucus and pus'. Why would my sputum contain pus if there is no infection? Does this mean that further damage is continuing?

I have previously suffered from MRSA several times, as well as the more usual bacterial infections, viruses and aspergillus (aspergillosis).

Many thanks for your help.
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Pus means containing lots of white blood cells.  As the word is commonly understood this is generally an indicator of infection.  Perhaps the culture reports are misleading because:
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