HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (23) Citing Articles via Google Scholar Google Scholar Articles by STRICKMAN, D. Articles by KITTAYAPONG, P. Search for Related Content PubMed PubMed Citation Articles by STRICKMAN, D. Articles by KITTAYAPONG, P. Related Collections Vector Biology Dengue Medical Entomology Mosquitoes

DENGUE AND ITS VECTORS IN THAILAND: CALCULATED TRANSMISSION RISK FROM TOTAL PUPAL COUNTS OF AEDES AEGYPTI AND ASSOCIATION OF WING-LENGTH MEASUREMENTS WITH ASPECTS OF THE LARVAL HABITAT

Working in a village dengue focus in Chachoengsao Province, Thailand, aedine mosquito larvae and pupae were counted in all containers of 10 houses per month. The wings of female Aedes aegypti (L.) emerging from pupae were measured. Number of pupae and size of emerging females increased in containers with qualities that favored availability of larval food sources (e.g., uncovered containers). The small size of most mosquitoes compared with those raised in the laboratory indicated that the larval population as a whole was under nutritional stress. Applying the number of pupae per house and measurement of air and water temperature with an existing model, the risk of dengue transmission was greatest in May and June. The estimated number of female Ae. aegypti per house was well above the threshold for increasing transmission in all months but December through February. A phased approach to sampling immature aedine mosquitoes in Thailand is proposed, which would consist of routine surveillance of larval index and occasional total counts with measurement of wing size. Such a system would combine the benefits of the simple application of larval surveillance with the valuable data gathered from pupal counts and wing measurements.

Received May 15, 2001. Accepted for publication October 23, 2002.

Acknowledgments: We thank Dana Focks for his scientific advice during the years of analysis of this study; John Boslego and Ronald Rosenberg for encouragement and administrative support; and the homeowners of Village 8, who tolerated considerable inconvenience while their daily water sources were sampled. The technical staff for this study was named in a previous publication.¹²

Financial support: This study was supported by funds from the U.S. Army Medical Research and Materiel Command and from Mahidol University. Infrastructural support in the form of salaries and facilities from the Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand, Mahidol University, and the Thai Ministry of Public Health were important investments toward this study.

Disclaimer: The views and assertions presented in this article are those of the authors and do not purport to represent the policy of the authors’ respective organizations.

Authors’ addresses: Daniel Strickman, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, Telephone: 301-319-9655, Fax: 301-319-9290, E-mail: daniel. strickman{at}na.amedd.army.mil. Pattamaporn Kittayapong, Center for Vector and Vector-Borne Diseases, Department of Biology, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand, Telephone: 66-2-246-0063 extension 2407, Fax: 66-2-247-7050, E-mail: grpkt{at}mahidol.ac.th

Reprint requests: Daniel Strickman, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910-7500, Telephone: 301-319-9655, Fax: 301-319-9290, E-mail: daniel.strickman{at}na.amedd.army.mil

This article has been cited by other articles:

				R. Barrera Simplified Pupal Surveys of Aedes aegypti (L.) for Entomologic Surveillance and Dengue Control Am J Trop Med Hyg, July 1, 2009; 81(1): 100 - 107. [Abstract] [Full Text] [PDF]

				C. J. M. Koenraadt, J. Aldstadt, U. Kijchalao, R. Sithiprasasna, A. Getis, J. W. Jones, and T. W. Scott Spatial and Temporal Patterns in Pupal and Adult Production of the Dengue Vector Aedes aegypti in Kamphaeng Phet, Thailand Am J Trop Med Hyg, August 1, 2008; 79(2): 230 - 238. [Abstract] [Full Text] [PDF]

				C. Chansang and P. Kittayapong Application of Mosquito Sampling Count and Geospatial Methods to Improve Dengue Vector Surveillance Am J Trop Med Hyg, November 1, 2007; 77(5): 897 - 902. [Abstract] [Full Text] [PDF]

				C. PAUPY, N. CHANTHA, K. HUBER, N. LECOZ, J.-M. REYNES, F. RODHAIN, and A.-B. FAILLOUX INFLUENCE OF BREEDING SITES FEATURES ON GENETIC DIFFERENTIATION OF AEDES AEGYPTI POPULATIONS ANALYZED ON A LOCAL SCALE IN PHNOM PENH MUNICIPALITY OF CAMBODIA Am J Trop Med Hyg, July 1, 2004; 71(1): 73 - 81. [Abstract] [Full Text] [PDF]