Mosquito and Dengue Vector Control

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  • Topic: Aedes, Mosquito, Dengue fever
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  • Published : December 30, 2012
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R&D THRUSTS ON DENGUE
Department of Science and Technology
PHILIPPINE COUNCIL FOR HEALTH RESEARCH AND DEVELOPMENT

Dengue R&D Program
DENGUE

COMMUNITY

VECTOR

CONTROL and
MANAGEMENT

HOST

DIAGNOSIS

TREATMENT

Addresses the disease determinant factors in the epidemiologic cycle of dengue causation

VECTOR CONTROL
and MANAGEMENT

Vector Control_________________
include targeting the mosquito vector/s in the
habitats of its larval and adult stages in
households and immediate surroundings and
in any area where human-vector contact may
occur.
 understanding of local mosquito ecology
which is critical for establishing an efficient
and targeted strategy


ONGOING PROJECTS______________
Vector Control and Management

Vector Control and
Management

Ongoing Projects_________________
Paminta Larvicide for Dengue Vector Control
(DOST-developed O/L trap)
Laboratory Testing (ITDI)**
 Field testing in Quezon City and Marikina (ITDI)**
 Ovicidal Trap, an anti dengue mosquito device
(UP-CPH)**
 Roll-out in barangays nationwide in cooperation
and DOH (ITDI)


**Completed Activities

ITDI Study


The developed ovi/larvicidal trap
system is effective in attracting Aedes
mosquitoes and at the same time lethal
to hatched larvae



It is safe, cheap and make use of
natural active agent



The process is simple and can control
the population of Aedes mosquitoes

Laboratory Study




The Ovi-Trap System (OTS) with test solution was able to attract about 70% of Aedes Mosquito population as compared to 30% using OTS with plain water
Oviposition response to different concentrations of aqueous solution showed three times better at 1000ppm and five times better at 2000ppm as compared to negative control;



LC50 of 127 mg/l and 395 mg/l for LC90.



Outside the glass chamber exposure study of different concentration of test aqueous solution, pellets and alcoholic extracts at DOST buildings showed about twice better oviposition response in both the 1000 ppm aqueous solution and pellet concentration as compared with the control.

Field Study



Egg & Larval mortality is about 85.0 % for test
aqueous solution and 86.4% for larvicidal pellet in
both areas .



More number of eggs counted in the test solution
with more positive counts than the negative control



Hatched larvae in the ovitraps with test solutions
showed difficulty to go into next larval stages. They
remain larvae for a long time before expiration.

OVICIDAL TRAP, AN ANTI
DENGUE MOSQUITO DEVICE
A Project Financially Supported by the
Philippine Council for Health Research and Development,
Department of Science and Technology

Research Team
Dr. Lilian A. de las Llagas – Project Leader
Dr. Arlene G. Bertuso
Ms. Myra S. Mistica
Ms. Jocelyn B. Samaniego
The Fieldworkers from Brgys Batong Malake & San Antonio,
Los Baños, Laguna

Key Questions
1.

Can the ovicidal trap with organic
larvicide formulated as tablets
contribute to the lowering of the Aedes
population in the study site?

2. Does the organic larvicide’s performance
comparative with the commercially
available larvicide?

Methodology




Site selection:
 Areas where both vectors
(Aedes aegypti and Aedes albopictus)
of Dengue are present
 Dengue cases are present
 Two ecologically different sites
Sampled houses
 Houses within 50 – 300 m radius from
the index house

9

6
8
1

10

8 – 9 d old female
Aedes

200 – 300 m

Index
House

School

100 m

2
50 m
5

3
Legend :
Index house – house with
dengue case

7
4

7 A.M.
© 2001 by de las Llagas, L. A.

5 P.M.

Data Collection – 5 months
ACTIVITY

TOOL

INDICATOR

Pre-intervention
Phase

Ovitrap

Ovitrap Index (OI)
Adult Productivity Index
(API)

Intervention Phase

Ovicidal Traps
-“X”
-“O”

Ovitrap Index (OI)
Adult Productivity Index
(API)...
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