TITLE:
Comparative Evaluation of the Regular Ovitrap vs an Innovated Larvitrap for Aedes Entomological Surveillance in Tapachula
AUTHORS:
Walter Eduardo Quezada-Yaguachi, Americo D. Rodriguez, Francisco Solís-Santoyo, Alma D. Lopez-Solis, William C. Black IV, Karla Saavedra-Rodriguez, Diego Morales-Viteri, Patricia Penilla-Navarro
KEYWORDS:
Innovated Larvitrap, Ovitrap, Aedes, Entomological Surveillance
JOURNAL NAME:
Advances in Entomology,
Vol.10 No.1,
January
6,
2022
ABSTRACT: Objective: The objective is to compare a regular ovitrap versus an innovated
larvitrap for monitoring Aedes spp.
populations. Materials and Methods: A total of 20 regular
ovitraps and 20 innovated larvitraps were placed in pairs in 20 houses from the
5 de Febrero neighborhood in Tapachula, Chiapas, Mexico. The innovation
consisted in the incorporation of a valve in the lower part of a half tire to
drain the contents in a 2 L collection container. The evaluation was carried
out during five weeks, collecting eggs and larvae from the ovitraps and
innovated larvitraps, respectively. Positivity indexes and insectary production
of adult Aedes spp. mosquitoes were
compared by collection type. Results: Average positivity
index for the five weeks period were 60% for ovitraps and 91.25% for innovated
larvitraps. During the five weeks, 4043 Ae. aegypti and 703 Ae. albopictus adult
mosquitoes were produced in the insectary from the eggs collected from
ovitraps, while from innovated larvitraps were 9014 Ae. aegypti, 1205 Ae. albopictus,
and 15 Culex spp. Conclusion: Collection by the innovated larvitrap was more efficient, collecting
3.56 times more Ae. aegypti than with ovitraps, using
approximately the same effort in time for replacing the filter paper from
traditional 1 L ovitraps. Since the logistics for the storage and placement of
larvitraps may still be a disadvantage in comparison with ovitraps, their use
could be specifically intended in sentinel sites for mosquito population
monitoring for entomological surveillance purposes.