Kantararom school2011 2

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Kantararom school2011 2

  1. 1. Climatic Factors and Mosquito Species in Rural and Urban Areas at Kantharom District, Srisaket Province Students: Jirasak Chaichana, Panida Promson, Patamaporn Singhansaree, Athit Reangthogn, Surapon Noonsung, and students from M5/2 T h S t i t K i K t h l K t Di t i t S i k t 33130 k thTeacher: Satapisat Kraisee, Kantararom school, Kantararom District, Srisaket 33130, www.kr.ac.th Scientists: Assoc. Prof. Dr. Krisanadej Jaroensutasinee, Assoc. Prof. Dr. Mullica Jaroensutasinee, Siriwan Wongkoon, Walailak University
  2. 2. ContentsContents 11 IntroductionIntroduction 22 Research questionResearch question 33 Materials and MethodsMaterials and Methods 44 Results and DiscussionResults and Discussion 55 AcknowledgementsAcknowledgements55 AcknowledgementsAcknowledgements
  3. 3. IntroductionIntroductionIntroductionIntroduction K h l i l d l i d 15 1036 N d l i d• Kantararom school is located at latitude 15.1036 °N and longitude 104.57538 °E, Kantararom district, Srisaket. Kantararom district is located on the sandy silt plateau and has several small ponds with 100,157 populations, 2,636 households, population density in urban area of 141 individuals/km2 and in rural area of 9 individuals/km2.
  4. 4. IntroductionIntroductionIntroductionIntroduction • There were 330 dengue incidence with a deathincidence with a death rate of 0.30 at Sisaket in 2008 • Since 1st January -31th July 2010, there were 1,200 dengue incidences which was ranked fourth dengue incidence rate indengue incidence rate in northeastern region. (Ministry of Health: online 2010).
  5. 5. IntroductionIntroductionIntroductionIntroduction rainfalls Growth rate ofGrowth rate of temperature Growth rate ofGrowth rate of thethe mosquitomosquito larvalarva population density larvalarva Cause may be…Cause may be… relative humidity population density location of the community
  6. 6. IntroductionIntroductionIntroductionIntroduction WWe examined how urban and rural areas differ in number andrural areas differ in number and mosquito diversity. The relationship between O p the type and number of mosquito larvae associated with changes in h idit d t t Ours Purposes. humidity and temperature. The results from this study will help us gain a better p will help us gain a better understanding about dengue control and management.g
  7. 7. Research questionResearch questionResearch questionResearch question DDo mosquito number and species in urban and ruralspecies in urban and rural areas at Kantararom district differ? If yes, how do theydiffer? If yes, how do they differ? AAre there some differencesAAre there some differences between climatic factors and the number of mosquito larvae innumber of mosquito larvae in urban and rural areas at Kantharom District, Srisaket Province?
  8. 8. Materials and MethodsMaterials and MethodsMaterials and MethodsMaterials and Methods Study site (a) (b) y We selected urban and rural areas at Kantararom district, Srisaket into 53 study sites: 10 urban sites and 43 rural sites (Fig. 1a,b).
  9. 9. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion AAt urban areat urban area, there were two genus of mosquitoes: d d lAedes spp. and Culex spp. For Aedes, there were Aedes aegypti and Aedes albopictus .aegypti and Aedes albopictus . AAt rural areat rural area, there were three genus of mosquitoes:g q Aedes spp., Culex spp. and Anopheles spp. This indicates that rural areas might be morethat rural areas might be more malaria risk than urban area.
  10. 10. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion The number of Aedes aegypti larvae
  11. 11. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion The number ofThe number of AedesAedes albopictusalbopictus larvaelarvae
  12. 12. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion The number ofThe number of Culex spp.Culex spp. larvaelarvae
  13. 13. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion Urban areas rural areas (a) House index (b) Container index and (c) Breteau index in urban
  14. 14. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion 35.00 40.00 45.00 50.00 °C) highest temperature lowest temperature 250 300 350 400 all amount of rainfall Date 10 00 15.00 20.00 25.00 30.00 Temperature(° 50 100 150 200 250 mountofrainfa 0.00 5.00 10.00 T 0 50 am Months Figure 3 Max/min temperature in Kantharom area Months Figure 4. The amount of rainfall in K th A S i k t P i d iFigure 3. Max/min temperature in Kantharom area duringMay2009toOctober2010. Kantharom Area Srisaket Province during May 2009 to October 2010.
  15. 15. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion 100 120 maximum relative humidity minimum relative humidity 30 35 40 atients Months Urban area Rural area 60 80 vehumidity 15 20 25 30 engueFeverpa Rural area 0 20 40 … … Relativ 0 5 10 -… 9 9 9 9 9 9 9 0 0 0 0 -… 0 0 0 0 0 numberofde May-… Jun-2009 Jul-2009 Aug-2009 Sep-2009 Oct-2009 Nov-2009 Dec-2009 Jan-2010 Feb-2010 Mar-2010 Apr-2010 May-… Jun-2010 Jul-2010 Aug-2010 Sep-2010 Oct-2010 May- Jun-2009 Jul-2009 Aug-2009 Sep-2009 Oct-2009 Nov-2009 Dec-2009 Jan-2010 Feb-2010 Mar-2010 Apr-2010 May- Jun-2010 Jul-2010 Aug-2010 Sep-2010 Oct-2010 The Figure 5. Max/min relative humidity in Kantharom area during May 2009 to October 2010. Figure 6. The number of dengue fever patients at urban ( ) and at rural ( ) areas during May 2009 to October 2010.
  16. 16. Results and DiscussionResults and DiscussionResults and DiscussionResults and Discussion Figure 7. a) The relationship of the number of rainy days d h b f A i l b) The relationship of the number of rainy days d th b f d i idand the number of Ae. aegypti larvae. and the number of dengue incidences. As the number of rainy days increased, the number of Ae. aegypti and the number of dengue incidences increased (Figure 7a,b). This strongly indicated that climatic factors (in this case, the number of rainy days) strongly influences the number of mosquito larvae. The increases in the number of mosquito larvae will increase the chance of dengue vectors to transmit the dengue virus at a higher rate. Moreover, during rainy days, people tend to stay inside their houses which may also increase the chance of being bitten by Ae. aegypti females.As we already know that Ae. aegypti tends to stay inside the house and lays their eggs in the indoor water containers.
  17. 17. R fReferences S.C. Tewari, V. Thenmozhi, C. R. Katholi, R. Manavalan, A. Munirathinam and A. Gajanana. (2004). Dengue vector prevalence and virus infection in a rural area in south India.( ) g p Tropical Medicine and International Health 9(4): 499-507. S. Wongkoon, M. Jaroensuthasinee and K. Jaroensuthasinee. (2011). Climatic variability and dengue virus transmission in Chiang Rai, Thailand. Biomedica 27: 5-13. S. Thammapalo, V. Chongsuwiwatwong, D. McNeil and A. Geater. (2005).p , g g, ( ) The climatic factors influencing the occurrence of dengue hemorrhagic fever in Thailand. Southeast Asian J Trop Med Public Health, 36 (1) , 191-196. P.-C. Wu, H.-R. Guo, S.-C. Lung, C.-Y. Lin, H.-J. Su. (2007). Weather as an effective predictor for occurrence of dengue fever in Taiwan. Acta Tropica 103: 50–57.p g p
  18. 18. A k l d tA k l d tAcknowledgementsAcknowledgements ThisThis work is supported in part by GLOBE through Mosquito project, IPST and GLOBE southernMosquito project, IPST and GLOBE southern network. We thank Assoc. Prof. Dr. Krisanadej Jaroensutasinee, Assoc. Prof. Dr. MullicaJaroensutasinee, Assoc. Prof. Dr. Mullica Jaroensutasinee, Siriwan Wongkoon for some suggestions on experimental design and datasuggestions on experimental design and data analysis. We thank the director of Kantararom school, Mr. Rita Nantapan for supporting thisschool, Mr. Rita Nantapan for supporting this project.

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