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In an email from Asker:
The context was exactly as described in my question.
There was a list of medications in a report, each followed
by the disease or condition it was intended to treat.
Among those were the abbreviations I queried.
Uma infecção dos pulmões causada por um tipo de parasita. É uma infecção oportunista perigosa para indivíduos que são sensíveis a infecção, tais como pessoas portadoras de AIDS ou leucemia. Os sintomas da PCP incluem febre, tosse seca e falta de ar.
Note that the acronym in Portuguese is also PPC - so it really would help if you could tell us the medication in question.
Dr Sue Levy Local time: 05:23 Specializes in field Native speaker of: English PRO pts in category: 72