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Using paired serology and surveillance data to quantify dengue transmission and control during a large outbreak in Fiji.
Elife
August 2018
Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Dengue is a major health burden, but it can be challenging to examine transmission and evaluate control measures because outbreaks depend on multiple factors, including human population structure, prior immunity and climate. We combined population-representative paired sera collected before and after the 2013/14 dengue-3 outbreak in Fiji with surveillance data to determine how such factors influence transmission and control in island settings. Our results suggested the 10-19 year-old age group had the highest risk of infection, but we did not find strong evidence that other demographic or environmental risk factors were linked to seroconversion.
View Article and Find Full Text PDFTesting for Zika virus infection in pregnancy: key concepts to deal with an emerging epidemic.
Am J Obstet Gynecol
March 2017
Departments of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine, Houston, TX; National School for Tropical Medicine, Baylor College of Medicine, Houston, TX; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Departments of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Texas Children's Hospital, Houston, TX. Electronic address:
Zika virus is an emerging mosquito-borne (Aedes genus) arbovirus of the Flaviviridae family. Following epidemics in Micronesia and French Polynesia during the past decade, more recent Zika virus infection outbreaks were first reported in South America as early as May 2013 and spread to now 50 countries throughout the Americas. Although no other flavivirus has previously been known to cause major fetal malformations following perinatal infection, reports of a causal link between Zika virus and microcephaly, brain and ocular malformations, and fetal loss emerged from hard-hit regions of Brazil by October 2015.
View Article and Find Full Text PDFDengue-3 outbreak in Paraguay: investigations using capillary blood samples on filter paper.
Am J Trop Med Hyg
November 2008
Centre National de Référence des Arbovirus, Institut Pasteur de la Guyane, Cayenne, French Guiana.
During a dengue-3 outbreak in Paraguay at the beginning of 2007, capillary blood samples absorbed onto filter papers were collected from 44 suspected cases. These samples were subjected to three molecular and serologic tests, and 31 of the 44 samples gave a positive result by at least one of the techniques used. Molecular analyses detected the dengue-3 serotype in 22 patients and additionally the dengue-2 serotype in two patients.
View Article and Find Full Text PDFDengue-3 virus genomic differences that correlate with in vitro phenotype on a human cell line but not with disease severity.
Microbes Infect
January 2007
Laboratoire de Recherche en Virologie Médicale, Institut Louis Malardé, P.O. Box 30, 98713 Papeete, Tahiti, Polynésie Française.
We compared the full genome sequence of nine clinical isolates of dengue virus obtained during an epidemic of dengue-3 in French Polynesia in 1989, from patients with various presentations of disease. The isolates, all belonging to Genotype I, had 25 amino acid substitutions. There was no association with disease severity.
View Article and Find Full Text PDF[First autochthonous cases, caused by the Dengue-3 serotype in Federal District, Brazil].
Bull Soc Pathol Exot
May 2006
LACEN-DF: SGAN lote 601, 70830-010 Brasilia DF, Brésil.
During the first four months of 2003, the survey laboratory of the Federal District (LACEN Laboratory of Virology), Brasília, Brazil, isolated ten strains of dengue virus serotype 3, five of them autochthonous, and the remaining ones from cases imported from Tocantins, Goias and Bahia States. The virus isolations were performed in C6/36 cell culture inoculated with total blood collected between the 1st and the 5th days after the onset of the symptoms. The age of the patients varied from 26 to 59 years old.
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