Ecoepidemiological characterization of Rhodnius pallescens residents in the Attalea butyracea palm trees of the Mompós region in Colombia
DOI:
https://doi.org/10.17533/udea.acbi.329500Keywords:
Rhodnius pallescens, Trypanosoma cruzi, Chagas disease, Attalea butyracea, ecoepidemiologyAbstract
The study of Chagas vectors in natural environments permits the identification of eco-environmental factors to understand possible domestication processes and take prevention and control measures. Forty-one palms were dissected in the Mompós region, noting the presence or absence of inflorescences, fruit, epiphytes, mammals, reptiles and amphibians, as well as theseason and type of ecosystem. The insects collected were registered as to development stage, feeding stage, and sex. Sixty-six Rhodnius pallescens were used to morphologically detect Trypanosoma cruzi and eight unfed adult insects were used for its confirmation in rats. Ninety-eight surveys were conducted to document knowledge about and the primary risk factors associated with the disease. The infestation rate of the palms was 95.12%. Were collected 2.335 specimens of R. pallescens, averaging 56.95% individuals per palm. Five individuals of Triatoma dimidiata and two of Eratyrus cuspidatus also were encountered, and Triatoma maculata also was documented as peridomicilie. Rhodnius pallescens densities significantly related to the presence of infruitescences. Nymphal stage 1 also varied significantly with season (p < 0.05).Positive infection by trypanosomes was only possible in 53.06% of the R. pallescens. Parasitemia with T. cruzi was confirmed. The interviews revealed knowledge of the vector or risk factors. The existence of a wild infection focus for T. cruzi in R. pallescens in the Mompós region was confirmed.
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