Co-circulation of dengue, chikungunya, and Zika viruses and cross-protection
Abstract
To the Editor:
We read the publication on “Co-circulation of dengue, chikungunya,
and Zika viruses in Colombia from 2008 to 2018” with
a great interest (1). Rico-Mendoza et al. concluded that “The
decrease in the number of dengue cases after co-circulation of
the three viruses could indicate possible cross-protection” (1).
We would like to share ideas on this report. An interesting
question is whether there is a cross-protection or not. Based on
our setting in Indochina, a similar co-circulation of the three
viruses presently exists but there has never been any decrease
in number of dengue. In addition, there is no clear report
showing that there is a cross-protection due to the three virus
co-circulation. Priyamvada et al. mentioned that there might be
a common host immune response among viruses due to viral
structural similarity, but it is still no data regarding the immunoprotection
(2). Based on a recent publication by Wen et al.,
it is observed that there might be a cross protection via CD8+
but Wen et al. mentioned that “passive transfer studies suggest
that DENV-immune serum does not protect against ZIKV
infection” (3). Based on the data by Rico-Mendoza et al., there
is also a fluctuation of the number of the cases (such as between
2016 and 2018) (1). The fluctuation, increased and decreased
rate, might be due to several factors including to the environmental
factors that might stimulate or suppress the epidemic
of the vector borne disease. Due to the worldwide concern on
Zika virus, there might be some intensified prevention program
against mosquito borne disease.
Subject
Category of PAHO Strategic Plan 2014-2019
Citation
Joob B, Wiwanitkit V. Co-circulation of dengue,
chikungunya, and Zika viruses and cross-protection.
Rev Panam Salud
Publica. 2019;43: e75. https://doi.org/10.26633/RPSP.2019.75
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