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Norrman, Sandra, 2020. Alternate wetting and drying and its influence on zoonotic disease vectors in northern Vietnam : can changing the rice-growing method reduce the presence of Japanese encephalitis virus?. Second cycle, A2E. Uppsala: SLU, Dept. of Clinical Sciences

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Abstract

Japanese encephalitis is an important disease affecting 70,000 people every year, with young
children constituting the major part. Growing rice with alternate wetting and drying (AWD)
methodology reduces water consumption at the same time as it contributes to a reduction in
greenhouse gas emission. In this study, mosquitoes and mosquito larvae were collected at ricegrowing farmers’ households, comparing the number of mosquitoes at households using AWD
with households practicing conventional methods. Mosquitoes were also analyzed with PCR
regarding Japanese encephalitis virus. In addition, a survey was conducted at the households,
concerning the farmers knowledge about mosquito-borne diseases in general, Japanese
encephalitis in particular and their measurements taken to avoid these diseases. In total,
2,072 mosquitoes were trapped, identified and analyzed. No difference in the number of
mosquitoes were found between AWD-practicing households and households practicing
conventional rice growing. None of the mosquito pools tested positive for Japanese encephalitis
virus. Correlations between level of education and knowledge about mosquito-borne diseases
were found. Knowledge about these diseases needs to be improved to increase the preventions
practiced. This study shows that more research, with a greater number of material and in areas
with different constitutions between AWD and conventional rice-growing methods, is needed.

Main title:Alternate wetting and drying and its influence on zoonotic disease vectors in northern Vietnam
Subtitle:can changing the rice-growing method reduce the presence of Japanese encephalitis virus?
Authors:Norrman, Sandra
Supervisor:Lindahl, Johanna
Examiner:Magnusson, Ulf
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2020
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:VY002 Veterinary Medicine Programme 330 HEC
Supervising department:(VH) > Dept. of Clinical Sciences
Keywords:vector, Japanese encephalitis, mosquitoes, alternate wetting and drying, Vietnam
URN:NBN:urn:nbn:se:slu:epsilon-s-16388
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-16388
Subjects:Animal diseases
Human medicine, health, and safety
Language:English
Deposited On:01 Feb 2021 12:19
Metadata Last Modified:02 Feb 2021 02:00

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