Genomic surveillance of the Chikungunya Virus (CHIKV) in Northeast Brazil after the first outbreak in 2014

• Published in: Revista da Sociedade Brasileira de Medicina Tropical
• Main Authors: Ayslany Melo Rodrigues, Rafael Ribeiro Mota Souza, Larissa Moraes dos Santos Fonseca, Carolina de Araújo Rolo, Rejane Hughes Carvalho, Silvia Ines Sardi, Gubio Soares Campos
• Format: Article in Journal/Newspaper
• Language: English
• Published: Sociedade Brasileira de Medicina Tropical (SBMT) 2020
• Subjects: CHIKV; Phylogenetic analysis; Viral isolation; Arctic medicine. Tropical medicine; RC955-962; Arctic; Indian
• Online Access: https://doi.org/10.1590/0037-8682-0583-2019; https://doaj.org/article/9e01bf7201f8434b8b2915b7c40e0a97

Abstract INTRODUCTION: We performed an epidemiological surveillance of the Chikungunya (CHIKV) lineages in Bahia after the 2014 East/Central/South African (ECSA) genotype outbreak. METHODS: Reverse-transcription polymerase chain reaction (RT-PCR), viral isolation, and phylogenetic analyses were conducted on serum samples from 605 patients with CHIKV-like symptoms during 2014-2018. RESULTS: Of the 605 samples, 167 were CHIKV-positive. Viral isolation was achieved for 20 samples; their phylogenetic analysis (E2 protein) revealed the presence of ECSA lineage and reinforced the phylogenetic relationship between ECSA and Indian Ocean lineages. CONCLUSIONS: The genomic surveillance of CHIKV showed that only ECSA lineage circulated in Bahia since the 2014 outbreak.