RESUMEN
Granada virus (GRV), a new phlebovirus within the Naples serocomplex, has been recently described in phlebotomine sandflies from Spain. The presence of anti-GRV immunoglobulin G (IgG) antibodies was investigated by indirect fluorescence assay (IFA) and neutralization test (NT) in 920 serum samples from the Granada population. By IFA, an overall GRV seroprevalence of 15.8% (N = 145) was observed, significantly increasing up to 65 years. NT was positive in 18% of anti-GRV IFA-positive samples. IgG antibodies against Toscana virus (TOSV), a hyperendemic phlebovirus within Granada province, were detected in 40% of anti-GRV-positive cases. Anti-GRV IgM antibodies were detected in 36 (6.6%) of 547 acute-phase serum samples from individuals with febrile illness, exanthema, and/or acute respiratory infection. All positives were anti-TOSV IgM-negative. GRV may infect humans, with most cases being asymptomatic. The codetection of anti-GRV and anti-TOSV IgG antibodies could be attributable to cross-reactivity or exposure to the same transmission vector.
Asunto(s)
Anticuerpos Antivirales/sangre , Fiebre por Flebótomos/epidemiología , Fiebre por Flebótomos/fisiopatología , Phlebovirus/inmunología , Adulto , Anciano , Animales , Reacciones Cruzadas , Humanos , Inmunoglobulina G/sangre , Inmunoglobulina M/sangre , Persona de Mediana Edad , Fiebre por Flebótomos/virología , Psychodidae/virología , Virus de Nápoles de la Fiebre de la Mosca de los Arenales/inmunología , Estudios Seroepidemiológicos , España/epidemiologíaRESUMEN
INTRODUCTION: Members of the genus Enterovirus are usually investigated for their etiological role in neurological syndromes. However, they are often associated with other syndromes such as febrile illness, acute respiratory infection and exanthema. In this study, clinical and epidemiological data from five subjects with infection by the recently described enterovirus 75 were analyzed in the province of Granada (Spain). METHODS: Diagnosis at the genus level was carried out by viral culture in MRC-5 and rhabdomyosarcoma cell lines. Isolate serotypes were determined by RT-PCR of a fragment of the VP1 region and subsequent sequencing of the PCR products. RESULTS: Among the five enterovirus 75 isolated, two were detected in children with aseptic meningitis (1 month and 12 years old) and three in subjects with non-neurological syndromes, i.e. acute respiratory infection, febrile illness and gastroenteritis (all were aged less than one year). The five cases were detected between December 2005 and May 2006. All patients recovered without sequelae. CONCLUSION: These data demonstrate that enterovirus 75 circulates in the south of Spain and indicate that this enterovirus serotype may be implicated in less severe non-neurological syndromes, particularly in younger children, and mainly during the cold months of the year.