An investig-ation into the epidemiology of chikungunya virus across neglected regions of Indonesia.

Background Chikungunya virus (CHIKV) is an important emerging and re-emerging public health problem worldwide. In Indonesia, where the virus is endemic, epidemiological information from outside of the main islands of Java and Bali is limited. Methodology/principal findings Four hundred and seventy n...

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Bibliographic Details
Published in:PLOS Neglected Tropical Diseases
Main Authors: Samuel C B Stubbs, Edison Johar, Frilasita A Yudhaputri, Benediktus Yohan, Marsha S Santoso, Rahma F Hayati, Dionisius Denis, Barbara A Blacklaws, Ann M Powers, R Tedjo Sasmono, Khin Saw Aye Myint, Simon D W Frost
Format: Article in Journal/Newspaper
Language:English
Published: Public Library of Science (PLoS) 2020
Subjects:
Arctic medicine. Tropical medicine
RC955-962
Public aspects of medicine
RA1-1270
Arctic
Pacific
Bali
Online Access:https://doi.org/10.1371/journal.pntd.0008934
https://doaj.org/article/c37e1840147049ab8863ce5d7623aa06
Description
Summary:Background Chikungunya virus (CHIKV) is an important emerging and re-emerging public health problem worldwide. In Indonesia, where the virus is endemic, epidemiological information from outside of the main islands of Java and Bali is limited. Methodology/principal findings Four hundred and seventy nine acutely febrile patients presenting between September 2017-2019 were recruited from three city hospitals situated in Ambon, Maluku; Banjarmasin, Kalimantan; and Batam, Batam Island as part of a multi-site observational study. CHIKV RNA was detected in a single serum sample while a separate sample was IgM positive. IgG seroprevalence was also low across all three sites, ranging from 1.4-3.2%. The single RT-PCR positive sample from this study and 24 archived samples collected during other recent outbreaks throughout Indonesia were subjected to complete coding region sequencing to assess the genetic diversity of Indonesian strains. Phylogenetic analysis revealed all to be of a single clade, which was distinct from CHIKV strains recently reported from neighbouring regions including the Philippines and the Pacific Islands. Conclusions/significance Chikungunya virus strains from recent outbreaks across Indonesia all belong to a single clade. However, low-level seroprevalence and molecular detection of CHIKV across the three study sites appears to contrast with the generally high seroprevalences that have been reported for non-outbreak settings in Java and Bali, and may account for the relative lack of CHIKV epidemiological data from other regions of Indonesia.

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