| Title |
A dengue outbreak on a floating village at Cat Ba Island in Vietnam
|
|---|---|
| Published in |
BMC Public Health, September 2015
|
| DOI | 10.1186/s12889-015-2235-y |
| Pubmed ID | |
| Authors |
Thanh Le Viet, Marc Choisy, Juliet E. Bryant, Duoc Vu Trong, Thai Pham Quang, Peter Horby, Hien Nguyen Tran, Huong Tran Thi Kieu, Trung Nguyen Vu, Kinh Nguyen Van, Mai Le Quynh, Heiman FL Wertheim |
| Abstract |
A dengue outbreak in an ecotourism destination spot in Vietnam, from September to November 2013, impacted a floating village of fishermen on the coastal island of Cat Ba. The outbreak raises questions about how tourism may impact disease spread in rural areas. Epidemiological data were obtained from the Hai Phong Preventive Medical Center (PMC), including case histories and residential location from all notified dengue cases from this outbreak. All household addresses were geo-located. Knox test, a spatio-temporal analysis that enables inference dengue clustering constrained by space and time, was performed on the geocoded locations. From the plasma available from two patients, positive for Dengue serotype 3 virus (DENV3), the Envelope (E) gene was sequenced, and their genetic relationships compared to other E sequences in the region. Of 192 dengue cases, the odds ratio of contracting dengue infections for people living in the floating villages compared to those living on the island was 4.9 (95 % CI: 3.6-6.7). The space-time analyses on 111 geocoded dengue residences found the risk of dengue infection to be the highest within 4 days and a radius of 20 m of a given case. Of the total of ten detected clusters with an excess risk greater than 2, the cluster with the highest number of cases was in the floating village area (24 patients for a total duration of 31 days). Phylogenetic analysis revealed a high homology of the two DENV3 strains (genotype III) from Cat Ba with DENV3 viruses circulating in Hanoi in the same year (99.1 %). Our study showed that dengue transmission is unlikely to be sustained on Cat Ba Island and that the 2013 epidemic likely originated through introduction of viruses from the mainland, potentially Hanoi. These findings suggest that prevention efforts should be focused on mainland rather than on the island. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 68 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 2 | 3% |
| Indonesia | 1 | 1% |
| Vietnam | 1 | 1% |
| Brazil | 1 | 1% |
| Unknown | 63 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 16 | 24% |
| Student > Master | 12 | 18% |
| Student > Bachelor | 5 | 7% |
| Student > Doctoral Student | 4 | 6% |
| Student > Ph. D. Student | 4 | 6% |
| Other | 9 | 13% |
| Unknown | 18 | 26% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 17 | 25% |
| Agricultural and Biological Sciences | 11 | 16% |
| Biochemistry, Genetics and Molecular Biology | 6 | 9% |
| Environmental Science | 4 | 6% |
| Nursing and Health Professions | 2 | 3% |
| Other | 8 | 12% |
| Unknown | 20 | 29% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 September 2015.
All research outputs
#20,292,660
of 22,829,083 outputs
Outputs from BMC Public Health
#13,898
of 14,871 outputs
Outputs of similar age
#230,286
of 274,417 outputs
Outputs of similar age from BMC Public Health
#270
of 280 outputs
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