Absence of both circadian rhythm and Trypanosoma cruzi periodicity with xenodiagnosis in chronic chagasic individuals.
Xenodiagnoses were performed every 3 hours using 10 Triatoma infestans 3rd instar for 24 to 72 hours, in 18 chronic chagasics with positive serology and/or xenodiagnosis. There was no statistically significant difference in the positivity of assays performed during the day (9:00 to 18:00 h) compared to those performed at night (21:00 to 6:00 h), (chi 2 = 0.1526 p = 0.696). Xenodiagnosis was performed in ten of the patients for 13 successive days but there was no periodicity detected in the positive assays.
Castro
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C
Universidade de Brasília (UnB), Faculdade de Medicina do Triângulo Mineiro, Uberaba MG, Brasil.
Prata
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A
D000818:Animals; D014355:Chagas Disease / Q000469:parasitology*; D002908:Chronic Disease; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008297:Male; D014349:Trypanosoma cruzi / Q000302:isolation & purification*; D020525:Xenodiagnosis