@article{fdi:010065297,
  title = {{A} dengue outbreak on a floating village at {C}at {B}a {I}sland in {V}ietnam},
  author = {{V}iet, {T}. {L}. and {C}hoisy, {M}arc and {B}ryant, {J}. {E}. and {T}rong, {D}. {V}. and {Q}uang, {T}. {P}. and {H}orby, {P}. and {T}ran, {H}. {N}. and {K}ieu, {H}. {T}. {T}. and {V}u, {T}. {N}. and {V}an, {K}. {N}. and {Q}uynh, {M}. {L}. and {W}ertheim, {H}. {F}. {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ackground: {A} dengue outbreak in an ecotourism destination spot in {V}ietnam, from {S}eptember to {N}ovember 2013, impacted a floating village of fishermen on the coastal island of {C}at {B}a. {T}he outbreak raises questions about how tourism may impact disease spread in rural areas. {M}ethods: {E}pidemiological data were obtained from the {H}ai {P}hong {P}reventive {M}edical {C}enter ({PMC}), including case histories and residential location from all notified dengue cases from this outbreak. {A}ll household addresses were geo-located. {K}nox test, a spatio-temporal analysis that enables inference dengue clustering constrained by space and time, was performed on the geocoded locations. {F}rom the plasma available from two patients, positive for {D}engue serotype 3 virus ({DENV}3), the {E}nvelope ({E}) gene was sequenced, and their genetic relationships compared to other {E} sequences in the region. {R}esults: {O}f 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). {T}he 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. {O}f 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). {P}hylogenetic analysis revealed a high homology of the two {DENV}3 strains (genotype {III}) from {C}at {B}a with {DENV}3 viruses circulating in {H}anoi in the same year (99.1 %). {C}onclusions: {O}ur study showed that dengue transmission is unlikely to be sustained on {C}at {B}a {I}sland and that the 2013 epidemic likely originated through introduction of viruses from the mainland, potentially {H}anoi. {T}hese findings suggest that prevention efforts should be focused on mainland rather than on the island.},
  keywords = {{VIET} {NAM}},
  booktitle = {},
  journal = {{B}mc {P}ublic {H}ealth},
  volume = {15},
  numero = {},
  pages = {art. 940 [8 p.]},
  ISSN = {1471-2458},
  year = {2015},
  DOI = {10.1186/s12889-015-2235-y},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065297},
}