12 Aug 2013

Dengue - Multistate (world) - Monitoring seasonal epidemics (ECDC/CDTR, August 12 2013, edited)

[Source: European Centre for Disease Prevention and Control (ECDC), full PDF document: (LINK). Extract.]

COMMUNICABLE DISEASE THREATS REPORT

Week 32, 4-10 August 2013

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Dengue - Multistate (world) - Monitoring seasonal epidemics

Opening date: 20 April 2006 Latest update: 8 August 2013

 

Epidemiological summary

  • Asia:
    • Laos, Malaysia and Singapore have reported more cases in 2013 than 2012 for the same time period.
    • The recent trend is that numbers of cases are increasing in Malaysia, Philippines and Vietnam. Dengue activity continues to be high in Laos, although there have been indications of it stabilising.
    • The numbers are decreasing in Australia, Cambodia and Singapore.
    • Thailand is experiencing a recent upsurge in dengue cases and the Ministry of Health has recorded nearly 82 000 cases and 78 deaths so far this year. The highest number of cases have been reported in the northern province of Chiang Mai.
    • In China, Guandong province has recorded 85 autochtonous cases of dengue fever to date.
  • Caribbean:
    • The dengue epidemic continues to spread in Guadeloupe whilst the Dominican Republic has recorded almost 6 000 suspected cases and 43 deaths since the beginning of the year.
  • Pacific:
    • The recent trend has declined to low levels in New Caledonia and the Solomon Islands. French Polynesia has been experiencing increased dengue levels. To date, 218 cases of dengue fever have been reported and Tahiti, Moorea, Bora Bora, Rangiroa and Fakarava are the most affected areas. The predominant serotypes circulating are DENV-1 and DENV-3.
  • Central and South America:
    • High dengue activity is reported across Central America. As of 27 July, more than 40 000 cases and 29 deaths have been recorded.
    • In Honduras, the government has declared a public health emergency after recording more than 15 000 suspected cases and 16 deaths.
    • Costa Rica has recorded the highest rate of new dengue infections so far this year with nearly 17 000 cases.
    • In other parts of Central America, Nicaragua, El Salvador and Panama have all reported an upward trend of new dengue infections during the past two weeks.
    • In South America, Brazil continues to be affected by numerous outbreaks, most notably in Mato Grosso State where DENV-1 is the predominant serotype circulating.
  • Africa:
    • The dengue epidemic in Angola has spread to two new provinces; Kwanza-Sul and Uige. Since the outbreak started on 12 March, 1 008 dengue cases have been reported, of which 735 are laboratory confirmed. In July, no new autochthonous dengue cases were recorded in RĂ©union.

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ECDC assessment

ECDC monitors individual outbreaks, seasonal transmission patterns and inter-annual epidemic cycles of dengue through epidemic intelligence activities in order to identify significant changes in disease epidemiology. Of particular concern is the potential for the establishment of dengue transmission in Europe. Before the 2012 outbreak in the Autonomous Region of Madeira, local transmission of dengue was reported for the first time in France and Croatia in 2010. Imported cases are being detected in European countries, highlighting the risk of locally acquired cases occurring in countries where the competent vectors are present.

 

Actions

ECDC has published a technical report on the climatic suitability for dengue transmission in continental Europe and guidance for invasive mosquitoes’su rveillance. From week 28 onwards, ECDC has been monitoring dengue on a biweekly basis.

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