Analysis of the arbovirus outbreak in a region of the metropolitan area of Buenos Aires. Identification of the first cases of indigenous circulation of Chikungunya virus
Abstract
The arbovirus outbreak that occurred in region V of the Province of Buenos Aires was characterized, during the period from January 1 to May 20, 2023 (EW 1-20). 781 sera from symptomatic patients were analyzed and the presence of viral RNA was analyzed by real-time PCR for Dengue, Zika and Chikungunya, and IgM serology by ELISA for Dengue and Chikungunya. It is observed for Dengue IgM 276/+102 (37%), Dengue PCR 585/+182 (31%), CHK IgM (until EW 16) 237/+63 (27%) and CHK PCR 589/+110 (27 %). The positivity outbreak in EW13 by PCR was 143/+52 (36.4%) for Dengue, coinciding with the week with the highest percentage of positivity in the samples analyzed. For Chikungunya, in SE13 by PCR, 143/+29 (20.3%) were detected, with SE11 being the one with the highest percentage of positivity in the samples analyzed, 44/+19 (43.2%). The Dengue serotypes found correspond to DENV2: 91.7% and DENV1: 8.3%. No positive samples for Zika were detected. The regional epidemiological analysis shows that in San Martín, the highest concentration of cases was in the popular neighborhoods “La Rana” and “9 de Julio” for dengue and chikungunya respectively. The indigenous circulation of Dengue was confirmed with the serotypes DENV1 and DENV2 and Chikungunya, being the first center to warn about the indigenous circulation of the latter virus.
Downloads
References
2. Heymann DL. 2022. Control of Communicable Diseases Manual. American Public Health Association.
3. Dengue y dengue grave. Organización Mundial de la Salud. http://www.who.int/mediacentre/factsheets/fs117/es/. Acceso 18/02/24
4. Directrices Para El Diagnóstico Clínico Y El Tratamiento del Dengue, El Chikunguña Y El Zika. 2021. Organización Panamericana de la Salud.
5. Estrategia de gestión integrada para la prevención y el control del dengue. https://www.paho.org/es/temas/dengue/estrategia-gestion-integrada-para-prevencion-control-dengue. Acceso 18/02/24.
6. Actualización Epidemiológica: Dengue y otras Arbovirosis - 10 de junio de 2020. Organización Panamericana de la Salud. 2020. https://www.paho.org/es/documentos/actualizacion-epidemiologica-dengue-otras-arbovirosis-10-junio-2020. Acceso 18/02/24.
7. Actualización Epidemiológica - Dengue en la Región de las Américas - 5 de julio de 2023. Organización Panamericana de la Salud. https://www.paho.org/es/documentos/actualizacion-epidemiologica-dengue-region-americas-5-julio-2023. Acceso 18/02/24
8. Boletín epidemiológico nacional N 661 SE 28 | 2023. Banco de Recursos de Comunicación del Ministerio de Salud de la Nación. https://bancos.salud.gob.ar/recurso/boletin-epidemiologico-nacional-n-661-se-28-2023. Acceso 18/02/24
9. Boletín epidemiológico 2023. Ministerio de Salud de la Provincia de Buenos Aires. https://www.ms.gba.gov.ar/sitios/media/files/2023/06/Bolet%C3%ADn-epidemiol%C3%B3gico_23.pdf. Acceso 18/02/24
10. Orientaciones de vigilancia, atención de casos y organización de los servicios en contexto de brotes o epidemias de dengue/chikungunya. 2022. Banco de Recursos de Comunicación del Ministerio de Saludde la Nación. https://bancos.salud.gob.ar/recurso/orientaciones-de-vigilancia-atencion-de-casos-y-organizacion-de-los-servicios-en-contexto. Acceso 18/02/24.
11. Santiago GA, Vergne E, Quiles Y, Cosme J, Vazquez J, Medina JF, Medina F, Colón C, Margolis H, Muñoz-Jordán JL. 2013. Analytical and clinical performance of the CDC real time RT-PCR assay for detection and typing of dengue virus. PLoS Negl Trop Dis 7:e2311.
Copyright (c) 2025 Florencia Wernert, Claudia Pengue, Maria Jimena Aranda, Graciela Radzuck, Claudia Kairiyama
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
