Acute Chagas<unk>  is often diagnosed by peripheral blood smear following the visual detection of T. cruzi parasite. Serology is often helpful for chronic cases only, where assay positivity of both "whole parasite lysate" and "recombinant antigen" is usually required for the diagnosis. Although PCR is sensitive in acute cases (e.g. exposure following organ transplantation), its sensitivity and specificity are variable in the chronic state and highly depend on the pre-test probability.
Chagas disease laboratory findings
Chagas disease physical examination
Silicosis physical examination
Psittacosis physical examination
Ehrlichiosis physical examination
Serratia infection laboratory findings
Sarcoidosis physical examination
Chagas disease diagnostic criteria