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Evaluation of RbCl and CrCl3 as markers of Triatoma brasiliensis (Hemiptera: Reduviidae) nymphs: persistence and influence of Rb and Cr on triatomine biology
Sarquis, Otília; Oliveira, Lívia S; Rego, Reginaldo; Gonçalves, Jaylei M; Lima, Marli M; Maciel-de-Freitas, Rafael.
Affiliation
  • Sarquis, Otília; s.af
  • Oliveira, Lívia S; s.af
  • Rego, Reginaldo; Instituto Oswaldo Cruz-Fiocruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro. BR
  • Gonçalves, Jaylei M; Instituto Nacional de Controle e Qualidade em Saúde-Fiocruz. Departamento de Química. Laboratório de Contaminantes Inorgânicos. Rio de Janeiro. BR
  • Lima, Marli M; s.af
  • Maciel-de-Freitas, Rafael; Instituto Oswaldo Cruz-Fiocruz. Laboratório de Transmissores de Hematozoários. Rio de Janeiro. BR
Mem. Inst. Oswaldo Cruz ; 106(4): 385-389, June 2011. mapas, tab
Article in En | LILACS | ID: lil-592178
Responsible library: BR1.1
ABSTRACT
In order to mark Triatoma brasiliensis, the vector of Chagas disease in Brazil, two chemical compounds, rubidium chloride (RbCl) and chromium chloride (CrCl3), were tested. First, 199 N2-N5 nymphs were fed on blood with 0.025M RbCl. Rb marker positivity ranged from 2.5 percent (N3)-70 percent (N2), with a maximum persistence of 98 days. Second, 265 N2-N5 nymphs were fed on blood containing 0.0015M CrCl3. Cr marker positivity ranged up to 93 percent (N5), with a maximum persistence of 119 days. Finally, we blood fed 213 T. brasiliensis to investigate whether CrCl3 altered the biology of this insect. The developmental time of T. brasiliensis was unaltered, but the survival of the Cr-marked group was lower than that of the control group. Differences in the mean fecundity of the control (mean of 156.1) and experimental (mean of 135.6) groups were not statistically significant and 100 percent of the egg batches of females Cr-marked as nymphs were positive. In conclusion, CrCl3 is a useful tool for marking T. brasiliensis nymphs due to its high positivity and persistence.
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Full text: 1 Index: LILACS Main subject: Rubidium / Triatoma / Chlorides / Chromium Compounds / Coloring Agents / Insect Vectors / Nymph Type of study: Evaluation_studies Limits: Animals Country/Region as subject: America do sul / Brasil Language: En Journal: Mem. Inst. Oswaldo Cruz Journal subject: MEDICINA TROPICAL / PARASITOLOGIA Year: 2011 Type: Article

Full text: 1 Index: LILACS Main subject: Rubidium / Triatoma / Chlorides / Chromium Compounds / Coloring Agents / Insect Vectors / Nymph Type of study: Evaluation_studies Limits: Animals Country/Region as subject: America do sul / Brasil Language: En Journal: Mem. Inst. Oswaldo Cruz Journal subject: MEDICINA TROPICAL / PARASITOLOGIA Year: 2011 Type: Article