Comparision of host seeking behaviour of anopheline mosquitoes between double layer net and conventional method
Issued Date
2014
Resource Type
Language
eng
Rights
Mahidol University
Suggested Citation
Nima Wangdi Gyeltshen, Sungsit Sungvornyothin, สังสิทธิ์ สังวรโยธิน, Supatra Thongrungkiat, สุพัตรา ทองรุ่งเกียรติ, Jean Pierre Dujardin (2014). Comparision of host seeking behaviour of anopheline mosquitoes between double layer net and conventional method. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/63167
Title
Comparision of host seeking behaviour of anopheline mosquitoes between double layer net and conventional method
Other Contributor(s)
Abstract
A double layer net (DLN) for sampling of malaria vectors was developed to
compare the sampling efficacy of this method against the conventional
method of human landing catch (HLC) under semi-field settings in a
screen-walled corridor using laboratory reared Anopheles dirus mosquitoes. Two
different colours of outer nets were also used, namely, black and white, to compare the
sampling sensitivity between two different coloured materials. The results indicated
that white DLN sampled more mosquitoes than the black DLN, p-value=0.015, 95%
C.I.: (-2.64,-0.33). A total of 26 replicate nights with 1300 Anopheles dirus mosquitoes
were used to conduct competitive comparison between the DLN and HLC, and found
that the double layer net caught 7.6 ± 1.1% and human landing catch caught 15.9±2%
of the released mosquitoes, respectively and the proportion of collection by double
layer net against human landing catch was 0.625 ± 0.12. The result showed that the
collection ratio between DLN and HLC was 1:2.09.
Different genera of mosquito species showed lower collection of mosquitoes by DLN
compared to HLC with the ratio of 1:1.94 for Aedes aegypti and 1:1.56 for Aedes
albopictus but the comparison between the black and white DLN showed that there
was no statistical significance difference on the number of Aedes aegypti sampled by
the two types of nets, p=0.86, whereas, in the case of Aedes albopictus, black DLN
was fond slightly more efficient that white DLN, p=0.006, 95% C.I.: (0.82, 4.36).
The double layer net does not expose people to potentially infectious mosquito bites
and it is designed to catch host-seeking mosquitoes only. Although the sensitivity is
half that of conventional method, yet, these traps could be further improved upon by
conducting field trails and its sensitivities further increased.
Description
Joint International Tropical Medicine Meeting 2014: 3D perspectives on tropical medicine: drivers, diversity and determination the 8th seminar on food-and water-borne parasitic zoonoses: 2-4 December 2014: Centara Grand Bangkok Convention Center at Central World, Bangkok, Thailand. Bangkok: Faculty of Tropical Medicine, Mahidol University; 2014. p. 255.