Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Más filtros










Base de datos
Intervalo de año de publicación
1.
Emerg Microbes Infect ; 7(1): 28, 2018 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-29535295

RESUMEN

A West Nile virus (WNV) outbreak occurred in Tunisia between mid-July and December 2012. To assess the epidemiological features of the WNV transmission cycle, human cerebrospinal fluid samples from patients with suspected cases (n = 79), Culex pipiens mosquitoes (n = 583) and serum specimens from domestic and migratory birds (n = 70) were collected for 4 years (2011-2014) in the Tunisian Sahel region. Viral testing was performed by polymerase chain reaction (PCR). The WNV genome was detected in 7 patients (8.8%), 4 Culex pipiens pools, and a domestic mallard (Anas platyrhynchos). All PCR-positive samples were from the Monastir region. Phylogenetic analysis revealed that two different WNV strain groups circulated, and isolates from the reservoir (bird), vector (Culex pipiens), and dead-end hosts (humans) were closely related. The Monastir region is a hot-spot for WNV infection, and the reiterative presence of WNV over the years has increased the risk of viral reemergence in Tunisia, which highlights the need for more enhanced and effective WNV surveillance in humans with public awareness campaigns strengthened by monitoring mosquitoes and maintaining avian surveillance for early detection of WNV circulation.


Asunto(s)
Enfermedades de las Aves/virología , Culex/virología , Meningoencefalitis/veterinaria , Meningoencefalitis/virología , Mosquitos Vectores/virología , Fiebre del Nilo Occidental/veterinaria , Fiebre del Nilo Occidental/virología , Virus del Nilo Occidental/aislamiento & purificación , Adolescente , Adulto , Anciano , Animales , Enfermedades de las Aves/sangre , Enfermedades de las Aves/epidemiología , Aves , Líquido Cefalorraquídeo/virología , Niño , Preescolar , Brotes de Enfermedades , Femenino , Humanos , Lactante , Masculino , Meningoencefalitis/sangre , Meningoencefalitis/epidemiología , Persona de Mediana Edad , Filogenia , Túnez/epidemiología , Fiebre del Nilo Occidental/sangre , Fiebre del Nilo Occidental/epidemiología , Virus del Nilo Occidental/clasificación , Virus del Nilo Occidental/genética , Virus del Nilo Occidental/fisiología , Adulto Joven
2.
BMC Public Health ; 16: 57, 2016 Jan 21.
Artículo en Inglés | MEDLINE | ID: mdl-26796330

RESUMEN

BACKGROUND/AIMS: Astroviruses (AstVs) are enteric viruses that can cause gastroenteritis in children. This study is part of monitoring the circulation of astroviruses in children hospitalized and/or outpatients for acute gastroenteritis at the primary care center of Ouerdanine or at the Pediatric Department of the University Hospital Fattouma-Bourguiba (Monastir, Tunisia). The aims of our study were to know the prevalence of human astrovirus in clinical samples of children, characterize the strains and evaluate the infectivity of isolated strains on cell culture. METHODS: Fifty stool samples were collected from children under five years old in the region of Monastir (Tunisia) from October 2010 to June 2011. All specimens were subjected to RT-PCR amplification followed by sequencing and phylogenetic analysis. RESULTS: The study shows a low prevalence of astrovirus (4 %) in children. The two positive samples obtained were HAstV type 3. Samples that were RT-PCR positive were cultured in CaCO-2 cells and the presence of infectious viral particles was confirmed. The phylogenetic analysis shows that the different HAstV-3 strains isolated in Tunisia are grouped into two clusters. The first cluster includes strains obtained in 2004, which belong to lineage HAstV-3a, while strains isolated in 2010 belong to lineage HAstV-3c. CONCLUSIONS: This study is part of monitoring the circulation of astroviruses in children younger than five years old from Monastir region, Tunisia. The results show low prevalence (4 %). All genotyped samples belonged to lineage HAstV-3c, which could be presently emerging. Two different lineages have been isolated in Tunisia: HAstV-3a in 2004 and HAstV-3c in 2010.


Asunto(s)
Infecciones por Astroviridae/epidemiología , Mamastrovirus/genética , Células CACO-2 , Niño , Preescolar , Heces/virología , Femenino , Gastroenteritis/epidemiología , Genotipo , Humanos , Lactante , Masculino , Reacción en Cadena de la Polimerasa , Prevalencia , Análisis de Secuencia de ADN , Túnez/epidemiología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...