Genomic characterization of travel-associated dengue viruses isolated at entry-exit ports in Fujian province, China, 2013-2015.

In this study, a total of three DENV-2 and two DENV-4 strains were isolated from suspected febrile travelers at two ports-of-entry in Fujian during 2013-2015. Complete viral genome sequences of these new isolates were obtained with Sanger chemistry. Genomic sequence analysis revealed that these strains belonged to genotypes of 2-Cosmopolitan and 4-II. In consistence with the patients' travel information, phylogenetic analyses of complete coding regions also indicated that most of the new isolates were genetically close to the circulating strains in Southeast Asia, rather than previous Chinese strains available. Therefore, phylogenetic analyses of the imported DENV demonstrated that multiple introductions of DENV emerged continuously in Fujian, and highlighted the importance of dengue surveillance at entry-exit ports in the subtropical regions of south China. PMID: 28674315 [PubMed - as supplied by publisher]
Source: Japanese Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: Jpn J Infect Dis Source Type: research

Related Links:

This study aimed to compare the short-term temperature-dengue associations during different dengue outbreak periods, estimate the den gue cases attributable to temperature, and ascertain if there was an association between heatwaves and dengue outbreaks in Hanoi, Vietnam. Methodology/Principal findingsDengue outbreaks were assigned to one of three categories (small, medium and large) based on the 50th, 75th, and 90th percentiles of distribution of weekly dengue cases during 2008 –2016. Using a generalised linear regression model with a negative binomial link that controlled for temporal trends, temperature variation,...
Source: PLoS Neglected Tropical Diseases - Category: Tropical Medicine Authors: Source Type: research
Publication date: Available online 16 January 2020Source: The Brazilian Journal of Infectious DiseasesAuthor(s): Veronica Elizabeth Mata, Sonia Regina Lambert Passos, Maria Angelica Borges dos Santos, Sibelle Nogueira Buonora, Carlos Augusto Ferreira de Andrade, Monique da Rocha Queiroz Lima, Betina Moreira Costa, Yara Hahr Marques HökerbergAbstractBackgroundAlthough performance of rapid immunochromatographic tests (RITs) for dengue virus (DENV) serotypes 1, 2 and 3 is relatively settled, evidence on accuracy of RITs for DENV-4 are based on studies with small sample sizes and with discrepant results.ObjectivesTo asses...
Source: The Brazilian Journal of Infectious Diseases - Category: Infectious Diseases Source Type: research
Paraguay is bracing for a potential major epidemic of Dengue fever after recording close to 7,000 suspected cases in the first two weeks of 2020, similar to levels in the severe 2013 outbreak that led to 250 deaths.
Source: Reuters: Health - Category: Consumer Health News Tags: healthNews Source Type: news
[Government of Mauritius] 'An inter-sectoral collaboration is key to control and prevent the outbreak of vector-borne diseases such as malaria, dengue and chikungunya, in particular during the currently prevailing cyclonic and rainy season'.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
YHM Abstract BACKGROUND: Although performance of rapid immunochromatographic tests (RITs) for dengue virus (DENV) serotypes 1, 2 and 3 is relatively settled, evidence on accuracy of RITs for DENV-4 are based on studies with small sample sizes and with discrepant results. OBJECTIVES: To assess accuracy and inter-observer agreement of RITs targeting dengue nonstructural protein-1 (NS1) antigen - Dengue NS1-Bioeasy™, Dengue NS1 Ag Strip-Bio-Rad™, IVB Dengue Ag NS1-Orangelife™ and Dengue NS1-K130-Bioclin™ in DENV-4 samples. METHODS: Study sample (n = 324) included adults presentin...
Source: Braz J Infect Dis - Category: Infectious Diseases Authors: Tags: Braz J Infect Dis Source Type: research
Vector-Borne and Zoonotic Diseases, Ahead of Print.
Source: Vector-Borne and Zoonotic Diseases - Category: Infectious Diseases Authors: Source Type: research
Abstract Laboratory-based surveillance for arboviral diseases is challenging in resource-limited settings. We evaluated the use of filter paper-dried sera for detection of dengue virus (DENV) RNA during an outbreak in American Samoa. Matched liquid and filter paper-dried sera were collected from patients with suspected dengue and shipped to a reference laboratory for diagnostic testing. RNA was extracted from each sample and tested for DENV RNA by real-time reverse transcription-polymerase chain reaction (RT-PCR). Of 18 RT-PCR-positive liquid specimens, 14 matched filter paper-dried specimens were positive for a s...
Source: The American Journal of Tropical Medicine and Hygiene - Category: Tropical Medicine Authors: Tags: Am J Trop Med Hyg Source Type: research
This study aimed to develop a timely accurate forecasting model of dengue based on long short-term memory (LSTM) recurrent neural networks while only considering monthly dengue cases and climate factors. The performance of LSTM models was compared with the other previously published models when predicting DF cases one month into the future. Our results showed that the LSTM model reduced the average the root mean squared error (RMSE) of the predictions by 12.99% to 24.91% and reduced the average RMSE of the predictions in the outbreak period by 15.09% to 26.82% as compared with other candidate models. The LSTM model achieve...
Source: International Journal of Environmental Research and Public Health - Category: Environmental Health Authors: Tags: Article Source Type: research
Dengue fever outbreaks tend to spread northward in China, and Jining is the northernmost region where local dengue fever cases have been detected. Therefore, it is important to investigate the density of Aedes al...
Source: Parasites and Vectors - Category: Microbiology Authors: Tags: Research Source Type: research
ConclusionsThe paper describes a strategy that applies newspaper as proxies to monitor outbreaks of infectious diseases and to study the epidemiology. It has potential applicability in some developing countries and regions with relatively poor medical infrastructures and records. Clearly, large national newspapers in India provide a better source of information on diseases than international outlets. This approach has potential with selected diseases in a few selected countries. Article numbers internationally appear to vary in proportion to the perceived health impact.Graphical abstract
Source: Journal of Biomedical Informatics - Category: Information Technology Source Type: research
More News: Chemistry | China Health | Dengue Fever | Genetics | Infectious Diseases | Japan Health | Outbreaks | Study