Volume 11 Supplement 1

Challenges in malaria research

Open Access

The longevity of Anopheles sundaicus in a small area: Nongsa Pantai Villages, Batam City, Indonesia

  • Dewi Susanna1 and
  • Tris Eryando2
Malaria Journal201211(Suppl 1):P93

https://doi.org/10.1186/1475-2875-11-S1-P93

Published: 15 October 2012

Background

Mosquito lifespan is one component of the lifetime transmission potential of an individual mosquito. The length of life or lifespan (longevity) of an adult Anopheles may affect its power of transmitting malaria [1]. This study was to analyze the longevity of Anopheles sundaicus in small area, Nongsa Patai Village, Batam City, Indonesia.

Method

Research used time trend design which investigated within 3-4 months (July-October) in Nongsa Pantai Sub-villages, Nongsa Pantai Village, Batam City, Indonesia. The estimation of An. sundaicus’s longevity used a formula based on the Parous Rate and its gonothropic cycle, that is the duration of time the mosquito matures its eggs [2]. The gonothropic cycle of An. sundaicus is 3 days.

Results

The life span (longevity) of An. sundaicus in Nongsa Pantai Village ranged from 7.22 to 9.39 with 8.39 in average as shown in Table 1.
Table 1

The estimation of longevity of An. sundaicus in Nongsa Pantai Village, Batam City, Riau Islands Province during July-October

Observation (month)

Porous rate

Gonothropic cycle (days)

p**

Longevity (days)

July

0.66

3

0.8707

7.22

August*

0.70

3

0.8849

8.41

September

0.71

3

0.8921

8.76

October

0.72

3

0.8962

9.12

Mean

0.695

3

0.8857

8.39

*The average of PR in July and September is 0.70%; **p = daily survival rate; equivalen with square root of proportion of female gravid.

Anophelines go through four stages in their life cycle: egg, larva, pupa, and adult The first three stages are aquatic and last 5-14 days, depending on the species and the ambient temperature. The female Anopheles is not immediately infective after taking a blood meal and the parasite requires a period of time within the mosquito for its development to an infective stage. The period is termed the extrinsic incubation period [3]. A mosquito needs at least two feedings to complete one transmission cycle [4]. This parameter is strongly dependent on actual air average temperature. It may range from 8 days at 31°C to 22 days at 20°C (the mean value commonly used reaches 15 days). In Berlin, [5] probable extrinsic incubation time 21-24 days calculated for P. falciparum[2]. Theoretically, the time required for malaria transmission is at least 13-24 days under control of local temperature and humidity. That can be described as follows: 4-14 day for development from egg to pupae, and the extrinsic incubation period (EIP) ranged 8-10 days assuming the mosquito takes a blood meal directly from an infected person. The longevity of An. sundaicus in this area might transmit malaria when the longevity within the 4 month period ranged from 8 days to 10 days and might be the mosquitoes died because of insecticide residual spraying as a vectors control applied.

Conclusion

The longevity of An. sundaicus in coastal area Nongsa Pantai was below the minimum range for the completed life cycle and extrinsic incubation period (EIP).

Authors’ Affiliations

(1)
Department of Environmental Health, Faculty of Public Health, Universitas Indonesia
(2)
Department Biostatistic and Health Informatics, Faculty of Public Health, Universitas Indonesia

References

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Copyright

© Susanna and Eryando; licensee BioMed Central Ltd. 2012

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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