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Aedes aegypti mosquito update

Aedes aegypti mosquito, the vector for Dengue, Chikungunya and Zika vius
Monitoring Programme with Biogents mosquito traps help control the mosquito population.

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Madeira Dengue Fever outbreak update - 14 February 2013

14/2/2013

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Weekly number of dengue case from week 39/2012 to week 3/2013 - Probable and confirmed cases, n=2 164 excluding imported cases in the EU
Source: ECDC - 14 Feb. 2013
The latest figures from the Portuguese Ministry of Health indicate an important decrease of the number of notified cases reported since mid-November 2012, week 46 (see the 'Situação em 03/02/2013' update on the Dengue fever page of the Direção-Geral da Saúde website) - as reported in previos post on this blog. However, the outbreak is still on-going with 28 cases reported in 2013 and three cases last week recorded by the local epidemiological surveillance system. This is indicative of an uninterrupted transmission occurring since the start of the outbreak and continuous vector activity. In addition, based on retrospective information on vector surveillance and meteorological data, the seasonal increase of vector activities will likely take place from around May-June 2013.
 ECDC advises residents and travellers visiting the island of Madeira to take individual protective measures (like using repellents) to avoid mosquito bites. Dengue is transmitted by a daytime mosquito and consequently protective measures must be applied throughout the day. Travellers experiencing febrile symptoms with severe headache, retro-orbital pain, myalgia, arthralgia and maculo-papular rash within 21 days of visiting Madeira are advised to seek medical advice.

ECDC continues monitoring the situation in collaboration with National and regional (Madeira) public health authorities in Portugal and gathering information on confirmed cases reported by EU/EEA Member States among returning travellers.

Source: ECDC Epidemiological update: Outbreak of dengue in Madeira, Portugal, 14 Feb 2013
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Madeira Dengue Fever - number of new weekly cases reported in local population continue to drop

12/2/2013

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Madeira Dengue cases reported in local population continue to drop. Source: DGS report 3 February 2013

New Madeira Dengue cases reported per week in local population continue to drop

Since the start of the Dengue outbreak in Madeira on 3rd October 2012, a total of 2164 Dengue fever cases have been reported in the Autonomous Region of Madeira health network, with new number of reported cases per week in local population continuing to drop.

Exported cases of Dengue Fever

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Madeira Dengue Fever - exported cases. Analysis www.zino.pt
NOTE: reporting is monthly, so possible that exported cases could have occurred since previous report issue rather than a significant outbreak.

Total number of exported cases has increased from 74 to 78 since the last monthly report in January 2013, with one new case reported in Portugal and three in Finland. The last report was on 1st February 2013 (ECDC - CDTR report week 6).

No travel restrictions to and from Madeira maintained and preventative measures still recommended.

Although the number of new local Dengue Fever cases reported per week continue to drop (due to reduced mosquito population activity because of lower temperatures), dengue still exists in the vector Aedes aegypti mosquito in Madeira, as the new cases confirm. Health authorities maintain the recommendation of prevention measures to avoid getting bitten by mosquito.

Dengue Fever mosquito Monitoring Programme

We maintain developing the Aedes aegypti Mosquito Monitoring Programme which will allow participants to monitor mosquito eggs and larvae as well as adult mosquito population and, according to weekly results, take preventative measures to avoid adult mosquito outbreaks and consequent Dengue Fever transmission/outbreak.
The Aedes aegypti Mosquito Monitoring Programme can also include a site visit and audit to identify potential mosquito breeding sites and recommend actions to reduce or eliminate breeding sites as well as regular audits to verify implementation of recommendations.

We are working with the Chamber of Commerce and local  authorities to develop a network of participants who want to monitor their own private areas, which can complement the monitoring network being done by local authorities.
contact - MOSQUITO MONITORING PROGRAMME
Sources:
  • DGS report 3 February 2013
  • ECDC Communicable Disease Threats Report (CDTR) - week 6/2013 - 12 February 2013
2013-02-03_dgs_i018334.pdf
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2013-02-12_ecdc_communicable-disease-threats-report-9-feb-2013.pdf
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Mosquitaire traps recommended by the European Centre for Disease Prevention and Control (ECDC)

4/2/2013

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Biogents Mosquitaire traps recommended as most efficient for Dengue vector mosquitoes: Aedes aegypti and Aedes albopictus

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Methods of collection of IMS (invasive mosquito species) adult or detection by egg collection and their efficacy according to mosquito species. SOURCE: ECDC Guidelines for the surveillance of invasive mosquitoes in Europe
The ECDC have released a Technical Report "Guidelines for the surveillance of invasive mosquitoes in Europe" which can be consulted below.

Once again, our selected Biogents Mosquitaire mosquito traps have been recognised as most efficient at capturing Dengue vector mosquitoes Aedes aegypti and Aedes albopictus after "human landing collection", a process which must be used only if there is no evident risk of transmission during the mosquito bite / blood meal - this is therefore not recommended in Madeira!

Aedes aegypti Monitoring Programme

The Aedes aegypti Monitoring Programme aims to monitor both mosquito population with Ovitraps (egg and larva) as well with Biogients Mosquitaire mosquito traps (adult mosquito population).
All partners participating in the monitoring programme will not only demonstrate that they are being proactive with regard to the Dengue mosquito vector, but also be better informed and better prepared to take further actions to reduce mosquito population and consequent reduction in the possibility of of being bitten as one of the strongest recommendations regarding Dengue virus remains "preventative measures from getting bitten".

For all those interested in participating in the monitoring programme, please use the following contact form.
ecdc_ter-mosquito-surveillance-guidelines.pdf
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    Andrew Zino

    Licenciado em Micro Biologia de Medicina pela Universidade de Edimburgo (BSc Hons), após pesquisa, identifica em 2008 as armadilhas Biogents com prova cientifica da sua eficácia.

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