RESUMEN
Abstract INTRODUCTION: In Colombia, there is insufficient epidemiological surveillance of zoonotic hemorrhagic viruses. METHODS: We performed a sero-epidemiological study in indigenous populations of Wayuü, Kankuamos, and Tuchin communities using Maciel hantavirus and Junin arenavirus antigens for IgG detection by ELISA. RESULTS IgG antibodies to hantavirus and arenavirus were found in 5/506 (1%) and 2/506 (0.4%) serum samples, respectively. CONCLUSIONS: Arenavirus and hantavirus circulate in indigenous populations from the Colombian Caribbean region, and the results indicate that the indigenous populations are exposed to these zoonotic agents, with unknown consequences on their health, despite low seroprevalence.
Asunto(s)
Humanos , Masculino , Femenino , Adulto , Inmunoglobulina G/sangre , Indígenas Sudamericanos , Orthohantavirus/inmunología , Arenavirus/inmunología , Infecciones por Arenaviridae/epidemiología , Infecciones por Hantavirus/epidemiología , Anticuerpos Antivirales/sangre , Ensayo de Inmunoadsorción Enzimática , Estudios Seroepidemiológicos , Estudios Transversales , Factores de Riesgo , Colombia/epidemiología , Infecciones por Arenaviridae/diagnóstico , Infecciones por Hantavirus/diagnósticoRESUMEN
INTRODUCTION: In Colombia, there is insufficient epidemiological surveillance of zoonotic hemorrhagic viruses. METHODS: We performed a sero-epidemiological study in indigenous populations of Wayuü, Kankuamos, and Tuchin communities using Maciel hantavirus and Junin arenavirus antigens for IgG detection by ELISA. RESULTS: IgG antibodies to hantavirus and arenavirus were found in 5/506 (1%) and 2/506 (0.4%) serum samples, respectively. CONCLUSIONS: Arenavirus and hantavirus circulate in indigenous populations from the Colombian Caribbean region, and the results indicate that the indigenous populations are exposed to these zoonotic agents, with unknown consequences on their health, despite low seroprevalence.
Asunto(s)
Anticuerpos Antivirales/sangre , Infecciones por Arenaviridae/epidemiología , Arenavirus/inmunología , Infecciones por Hantavirus/epidemiología , Inmunoglobulina G/sangre , Indígenas Sudamericanos , Orthohantavirus/inmunología , Adulto , Infecciones por Arenaviridae/diagnóstico , Colombia/epidemiología , Estudios Transversales , Ensayo de Inmunoadsorción Enzimática , Femenino , Infecciones por Hantavirus/diagnóstico , Humanos , Masculino , Factores de Riesgo , Estudios SeroepidemiológicosRESUMEN
INTRODUCTION: The Caribbean area of Colombia has been severely affected by a Chikungunya virus (CHIKV) outbreak since 2014. METHODOLOGY: The study was carried out on 100 patients during a fever outbreak from August to September 2014 in two small rural villages in the northern Caribbean area of Colombia. The molecular assays performed by reverse transcription polymerase chain reaction (RT-PCR) on acute patient sera were collected within one to five days of the appearance of symptoms. Sequence analyses were carried out based on phylogenetic analyses of genes NS1 and E2. For serological assays, 49 (49%) patients at ≥ 6 days of disease onset were tested with NovaLisa Chikungunya IgG/IgM µ-capture enzyme-linked immunosorbent assay (ELISA). RESULTS: The main signs or symptoms associated with Chikungunya infection were arthralgia of the lower limbs (96%), fever (91%), arthralgia of the upper limbs (85%), rash (64%), and headache (57%). Ninety-four percent (46/49) of patients were positive for either IgM or IgG; the remaining three (6%) patients were seronegative. Viral loads were detected in 25 patients. Based on phylogenetic analysis of NS1 and E2, the characterization of the Colombian CHIKV indicated that it was a strain closely related to the British Virgin Islands strain and to the Asian genotype. CONCLUSIONS: This study shows the phylogenetic and clinical description of CHIKV in Colombia. The main symptoms shown were: arthralgia, fever, and rash. CHIKV sequences detected in Colombian patients were within the Asian genotype and closely related to the British Virgin Islands strain.
