title: [Comparative study between artificial xenodiagnosis performed immediately and four hours after venous punch].
abstract: Artificial xenodiagnosis was performed immediately after blood venous punch and then four hours later on 63 patients; 29 (46%) were male and 34 (54%) female, mean age 39 years (range 18 to 68 years). Eleven (17.5%) patients presented positive exams, of which eight (12.7%) were from immediate xenodiagnosis and 7 (11.1%) xenodiagnosis four hours after. Eight patients showed 17 positive pools from immediate xenodiagnosis and 7 patients with xenodiagnosis four hours later showed 11 positive pools (p = 0.34). Four patients were positive only on immediate xenodiagnosis, three only on xenodiagnosis 4 hours after and four were positive in both. The data demonstrate that xenodiagnosis can be performed up to four hours after blood collection without impairing the test results.
authors.affiliation: Núcleo de Medicina Tropical e Nutrição, Universidade de Brasília, Brazilia, DF, Brazil. cleudsoncastro@hotmail.com
authors.forename: Cleudson
authors.initials: C
authors.lastname: Castro
authors.forename: Martinho Candido A
authors.initials: MC
authors.lastname: Santos
authors.forename: Celeste Aida
authors.initials: CA
authors.lastname: Silveira
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D014355:Chagas Disease / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D014225:Triatominae / Q000469:parasitology; D014349:Trypanosoma cruzi / Q000302:isolation & purification; D020525:Xenodiagnosis / Q000379:methods*