Chikungunya Virus as Cause of Febrile Illness Outbreak, Chiapas, Mexico, 2014
Tiffany F. Kautz1
, Esteban E. Díaz-González1
, Jesse H. Erasmus, Iliana R. Malo-García, Rose M. Langsjoen, Edward I. Patterson, Dawn I. Auguste, Naomi L. Forrester, Rosa Maria Sanchez-Casas, Mauricio Hernández-Ávila, Celia M. Alpuche-Aranda, Nikos Vasilakis
, and Ildefonso Fernández-Salas
Author affiliations: University of Texas Medical Branch, Galveston, Texas, USA (T.F. Kautz, J.H. Erasmus, R.M. Langsjoen, E.I. Patterson, D.I. Auguste, N.L. Forrester, S.C. Weaver); Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Mexico (E.E. Diaz-Gonzalez); Centro Regional de Investigación en Salud Pública, Tapachula, Mexico (I.R. Malo-García, I. Fernandez-Salas); Universidad Autónoma de Nuevo León, Escobedo, Mexico (R.M. Sanchez-Casas); Instituto Nacional de Salud Pública, Cuernavaca, México (M. Hernández-Ávila, C.M. Alpuche-Aranda)
Figure 2. A) Number of serum samples positive for chikungunya virus (CHIKV) by reverse transcription quantitative PCR (qRT-PCR), for CHIKV IgM by ELISA, and negative for CHIKV by both methods, arranged according to day after fever onset. B) Phylogenetic tree generated by Bayesian analysis showing the relationship of the complete genomic sequences of 5 chikungunya virus isolates from Mexico and representative sequences from the GenBank library. All nodes showed posterior probabilities of >0.9, except those indicated with a star. The inset shows the closest relatives of the 5 isolates. ECSA, East/Central/South African, IOL, Indian Ocean lineage. Scale bars indicates nucleotide substitutions per site.
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