Assertion: c. psittaci | /r/HasProperty | demonstrated by micro-immunofluorescence mif
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Source sentences:
text: Fourfold or greater increase in antibody (Immunoglobulin G [IgG]) against C. psittaci demonstrated by micro-immunofluorescence (MIF) or complement fixation (CF) assays between paired acute - and convalescent - phase serum specimens obtained at least 2 weeks apart in those older than 5 years with a clinically compatible illness.