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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The nonparasitic phase of Dermacentor nitens under field conditions in southeastern Brazil

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Author(s):
Marcelo Bahia Labruna [1] ; João Luiz Horácio Faccini [2]
Total Authors: 2
Affiliation:
[1] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Departamento de Medicina Veterinária Preventiva e Saúde Animal - Brasil
[2] Universidade Federal Rural do Rio de Janeiro. Instituto de Veterinária. Departamento de Parasitologia Animal - Brasil
Total Affiliations: 2
Document type: Journal article
Source: Revista Brasileira de Parasitologia Veterinária; v. 29, n. 4 2020-10-23.
Abstract

Abstract Dermacentor nitens is a one-host tick that uses domestic equids as main hosts. Herein, the nonparasitic phase of D. nitens was evaluated under field conditions in Pirassununga, São Paulo state, Southeastern Brazil. By exposing engorged females of D. nitens to field conditions (grass plots) for 24 consecutive months, this tick species was able to complete its nonparasitic phase by producing host-seeking larvae in the pasture throughout the year. Preoviposition and egg incubation periods were longer during autumn and winter months than during the other months. The number of larvae generated by engorged females was in most of the times lower during autumn and winter months, as demonstrated by lower egg hatching values. Such conditions could be linked to lower mean temperatures and rainfall. Larvae with the longest longevity hatched from the eggs with the shortest incubation periods. An apparent synchronism of larval hatching during spring was observed from the eggs laid by females during late winter and autumn, which is consistent with the phenomenon of “spring rise”. The results indicate that D. nitens can complete up to five generations per year in southeastern Brazil, providing baseline data to develop future protocols for the appropriate control of D. nitens on horses. (AU)

FAPESP's process: 13/18046-7 - Capybaras, ticks, and spotted fever
Grantee:Marcelo Bahia Labruna
Support Opportunities: Research Projects - Thematic Grants