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Community-Based DengueVector Control

Presentation byGerard Servais, Health Specialist

12 September 2013

Disclaimer: The views expressed in this paper/presentation do not necessarily reflect the views or

policies of the Asian Development Bank (ADB), or its Board of Governors, or the governments they

represent. ADB does not guarantee the accuracy of the data included in this paper and accepts no

responsibility for any consequence of their use. Terminology used may not necessarily be consistent

with ADB official terms.

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Short Update on Dengue

By 5 September 2013 , 51,000 denguecases in Cambodia and Lao PDR;15,000 in Singapore; 96,000 inPhilippines; 18,000 in Malaysia.

Key determinants of dengue emergencedeterminants are (i) urbanization ; (ii)

population mobility; (iii) climate change.

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ADB-WPRO Intervention.

The ADB funded TA Regional PublicGoods for Health: Combating Dengue in

ASEAN has tested a community basedvector control intervention in Lao PDRand Cambodia, in collaboration with

World Health Organization WesternPacific Region.

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Dengue Transmission and

Mosquito Lifecycle Dengue transmission Mosquito lifecycle

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Mosquito Breeding Sites

Discarded trash (tires, bottles, plastic packaging, )

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Mosquito Breeding Sites

Water containers

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Pilot Intervention Discarding or turning over unused containers.

Disposing discarded trash.

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Pilot Intervention

Introducing one or two fishes in every watercontainer. The fish will eat the mosquito larvaeand feed on other microorganism in the

container.

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Pilot Intervention

Raising awareness in the community, targetingon health workers, school children andteachers, womens organizations and religious

groups.

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Pilot Intervention

Identify ponds or tanks for guppy fishreproduction.

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Methodology of the Study

Intervention sites: 50 villages in Cambodia andLao PDR (population 57,000)

Control sites: 17 villages (population: 22,000) Entomology survey in June 2010 before the

start of the study, and 5 consequent datacollection until September 2011.

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Results: Percentage of watercontainers with at least one

guppy fish

0

10

20

30

40

50

60

70

80

90

100

Percentage

Drum

Cement tanks

Water jars

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Result: Percentage ofWater Containers with

Mosquito Larvae

0

10

20

30

4

0

50

June 2010 Sept 2010 Dec 2010 Mar 2011 June 2011 Sept 2011

Intervention Control

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Conclusions

Simple, sustainable, and community-based methods contribute to thedengue vector control.

Compared to other methods (insectidesor larvicides), biological methods arecheaper and environment-friendly.

It is easy to obtain community buy-infor the guppy fishes.

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Conclusions

However, there no magic bullet anddifferent methods must be used in

parallel.

Scaling up vector control measures iscostly and requires follow up.

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Special thank to all who

contributed to the study:The community of the intervention and control villages,

Bounpone Sidavong, Dr. Bouasy Hongvanthong, Tienkgham

Pongvongsa (Lao PDR),Char Meng Chour, Ngan Chantha, To Setha (Cambodia),

Carol Beaver, Kevin Palmer, Perry Morrisson,Eva Christophel, John Ehrenberg, Chang Moh Seng, Joshua Nealon

(WPRO) ,

Linda Loyd,Barbara Lochmann, Vincent de Wit, Patricia Moser (ADB)

http://www.adb.org/sites/default/files/pub/2013/community-based-dengue-vector-control.pdf

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