Absence of both circadian rhythm and Trypanosoma cruzi periodicity with xenodiagnosis in chronic chagasic individuals Ausência de ritmo circadiano e de periodicidade do Trypanosoma cruzi ao xenodiagnóstico em chagásicos crônicos
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 18:00h) compared...
| Published in: | Revista da Sociedade Brasileira de Medicina Tropical |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Sociedade Brasileira de Medicina Tropical (SBMT)
2000
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| Subjects: | |
| Online Access: | https://doi.org/10.1590/S0037-86822000000500003 https://doaj.org/article/21230a1a44c94396b1359939f771c5ec |
| Summary: | 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 18:00h) compared to those performed at night (21:00 to 6:00h), (chi² = 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. Realizamos xenodiagnósticos de 3 em 3 horas com 10 ninfas do 3° estágio de Triatoma infestans por um período de 24 a 72 horas, em 18 chagásicos crônicos que tinham sorologia e/ou xenodiagnóstico positivos. Não houve diferença estatisticamente significante na positividade entre os testes realizados durante o dia (9:00 às 18:00h) e à noite (21:00 às 6:00h), (chi² = 0,1526 p = 0,696). Dez dos pacientes fizeram também xenodiagnósticos diários, durante 13 dias sucessivos, não havendo periodicidade dos testes positivos. |
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