Brief Answer: CULTURE & SENSITIVITY of the pus Detailed Answer: Hello Mr. XXXX, Welcome again to the forum. After reading your query with complete diligence I can make out that Mega CV 625 Mg has been given for almost 20 days of period. In my view 20 days is quite long period of time for this antibiotic. As I guided in previous mail that we generally prescribe the medication for maximum of 2 weeks of time. If I were your relative’s treating doctor then would have opted for a simple test of "CULTURE & SENSITIVITY" of pus to see the effectiveness of the medicines. It is routinely done test and I prefer to do it every 7 days if there is long term seer skin infection is present. In CULTURE & SENSITIVITY- the pus is taken by a sterile cotton swab and then is subjected for identification of the exact nature of microorganism causing the pus formation. After that the sensitivity is done by particular antibiotics which are administered or which can be administered for that microorganism. So according to the test results the antibiotics can be changed or managed. As I said previously that Mega CV is been given of longer of the time than generally prescribed, therefore you can ask your relative’s treating doctor to go for CULTURE & SENSITIVITY of the pus and accordingly can change the antibiotics. I hope these informations will help you in managing fast recovery of your relative. My best wishes for the early recovery respected old fellow. Regards, Dr Sanjay Kumar Kanodia MD- Dermatology

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