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338 results on '"Kittayapong, Pattamaporn"'

54. Theoretical impact of insecticide-impregnated school uniforms on dengue incidence in Thai children

Author

Massad, Eduardo, Amaku, Marcos, Bezerra Coutinho, Francisco Antonio, Kittayapong, Pattamaporn, Wilder-Smith, Annelies, Massad, Eduardo, Amaku, Marcos, Bezerra Coutinho, Francisco Antonio, Kittayapong, Pattamaporn, and Wilder-Smith, Annelies

Abstract

Background: Children carry the main burden of morbidity and mortality caused by dengue. Children spend a considerable amount of their day at school; hence strategies that reduce human-mosquito contact to protect against the day-biting habits of Aedes mosquitoes at schools, such as insecticide-impregnated uniforms, could be an effective prevention strategy. Methodology: We used mathematical models to calculate the risk of dengue infection based on force of infection taking into account the estimated proportion of mosquito bites that occur in school and the proportion of school time that children wear the impregnated uniforms. Principal findings: The use of insecticide-impregnated uniforms has efficacy varying from around 6% in the most pessimistic estimations, to 55% in the most optimistic scenarios simulated. Conclusions: Reducing contact between mosquito bites and human hosts via insecticide-treated uniforms during school time is theoretically effective in reducing dengue incidence and may be a valuable additional tool for dengue control in school-aged children. The efficacy of this strategy, however, is dependent on the compliance of the target population in terms of proper and consistent wearing of uniforms and, perhaps more importantly, the proportion of bites inflicted by the Aedes population during school time.

Published
2013
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55. Maternal transmission efficiency of Wolbachia superinfections in Aedes albopictus populations in Thailand

Author

Kittayapong, Pattamaporn, Baisley, Kathy J, Sharpe, Rosie G, Baimai, Visut, and O'Neill, Scott L

Subjects
parasitic diseases, bacteria, biochemical phenomena, metabolism, and nutrition, reproductive and urinary physiology
Abstract

We examined the transmission efficiency of 2 strains of Wolbachia bacteria that cause cytoplasmic incompatibility in field populations of Aedes albopictus by polymerase chain reaction assay. We found mainland and island populations throughout Thailand to be superinfected with group A and B bacteria. Of 320 Wolbachia-positive adult mosquitoes, 97.5% were infected with both groups. Single infected individuals of each Wolbachia group were encountered in nearly equal numbers. We screened 550 offspring from 80 field-collected mothers and found the transmission efficiency of group A Wolbachia to be 96.7% and that of group B Wolbachia to be 99.6%. Mothers that did not transmit both Wolbachia infections to all of their offspring were significantly larger in size than those with perfect transmission fidelity. We discuss our findings in relation to the prospects of the use of Wolbachia as a gene-driving mechanism.

Published
2002

56. The impact of insecticide-treated school uniforms on dengue infections in school-aged children : study protocol for a randomised controlled trial in Thailand

Author

Wilder-Smith, Annelies, Byass, Peter, Olanratmanee, Phanthip, Maskhao, Pongsri, Sringernyuang, Luechai, Logan, James G., Lindsay, Steve W., Banks, Sarah, Gubler, Duane, Louis, Valerie R., Tozan, Yesim, Kittayapong, Pattamaporn, Wilder-Smith, Annelies, Byass, Peter, Olanratmanee, Phanthip, Maskhao, Pongsri, Sringernyuang, Luechai, Logan, James G., Lindsay, Steve W., Banks, Sarah, Gubler, Duane, Louis, Valerie R., Tozan, Yesim, and Kittayapong, Pattamaporn

Abstract

Background: There is an urgent need to protect children against dengue since this age group is particularly sensitive to the disease. Since dengue vectors are active mainly during the day, a potential target for control should be schools where children spend a considerable amount of their day. School uniforms are the cultural norm in most developing countries, worn throughout the day. We hypothesise that insecticide-treated school uniforms will reduce the incidence of dengue infection in school-aged children. Our objective is to determine the impact of impregnated school uniforms on dengue incidence. Methods: A randomised controlled trial will be conducted in eastern Thailand in a group of schools with approximately 2,000 students aged 7-18 years. Pre-fabricated school uniforms will be commercially treated to ensure consistent, high-quality insecticide impregnation with permethrin. A double-blind, randomised, crossover trial at the school level will cover two dengue transmission seasons. Discussion: Practical issues and plans concerning intervention implementation, evaluation, analysing and interpreting the data, and possible policy implications arising from the trial are discussed.

Published
2012
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57. DengueTools : innovative tools and strategies for the surveillance and control of dengue

Author

Wilder-Smith, Annelies, Renhorn, Karl-Erik, Tissera, Hasitha, Abu Bakar, Sazaly, Alphey, Luke, Kittayapong, Pattamaporn, Lindsay, Steve, Logan, James, Hatz, Christoph, Reiter, Paul, Rocklöv, Joacim, Byass, Peter, Louis, Valerie R., Tozan, Yesim, Massad, Eduardo, Tenorio, Antonio, Lagneau, Christophe, L'Ambert, Gregory, Brooks, David, Wegerdt, Johannah, Gubler, Duane, Wilder-Smith, Annelies, Renhorn, Karl-Erik, Tissera, Hasitha, Abu Bakar, Sazaly, Alphey, Luke, Kittayapong, Pattamaporn, Lindsay, Steve, Logan, James, Hatz, Christoph, Reiter, Paul, Rocklöv, Joacim, Byass, Peter, Louis, Valerie R., Tozan, Yesim, Massad, Eduardo, Tenorio, Antonio, Lagneau, Christophe, L'Ambert, Gregory, Brooks, David, Wegerdt, Johannah, and Gubler, Duane

Abstract

Dengue fever is a mosquito-borne viral disease estimated to cause about 230 million infections worldwide every year, of which 25,000 are fatal. Global incidence has risen rapidly in recent decades with some 3.6 billion people, over half of the world's population, now at risk, mainly in urban centres of the tropics and subtropics. Demographic and societal changes, in particular urbanization, globalization, and increased international travel, are major contributors to the rise in incidence and geographic expansion of dengue infections. Major research gaps continue to hamper the control of dengue. The European Commission launched a call under the 7th Framework Programme with the title of 'Comprehensive control of Dengue fever under changing climatic conditions'. Fourteen partners from several countries in Europe, Asia, and South America formed a consortium named 'DengueTools' to respond to the call to achieve better diagnosis, surveillance, prevention, and predictive models and improve our understanding of the spread of dengue to previously uninfected regions (including Europe) in the context of globalization and climate change. The consortium comprises 12 work packages to address a set of research questions in three areas: Research area 1: Develop a comprehensive early warning and surveillance system that has predictive capability for epidemic dengue and benefits from novel tools for laboratory diagnosis and vector monitoring. Research area 2: Develop novel strategies to prevent dengue in children. Research area 3: Understand and predict the risk of global spread of dengue, in particular the risk of introduction and establishment in Europe, within the context of parameters of vectorial capacity, global mobility, and climate change. In this paper, we report on the rationale and specific study objectives of 'DengueTools'. DengueTools is funded under the Health theme of the Seventh Framework Programme of the European Community, Grant Agreement Number: 282589 Dengue Tools

Published
2012
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58. Recent rapid rise of a permethrin knock down resistance allele in Aedes aegypti in México

Author

Kittayapong, Pattamaporn, Ponce García, Gustavo, Flores Suárez, Adriana Elizabeth, Fernández Salas, Ildefonso, Saavedra Rodríguez, Karla Lizet, Reyes Solis, Guadalupe del Carmen, Lozano Fuentes, Saúl, Guillermo Bond, J., Casas Martínez, Mauricio, Ramsey, Janine M., García Rejón, Julián Everardo, Domínguez Galera, Marco Antonio, Ranson, Hilary, Hemingway, Janet, Eisen, Lars, Black, William C., Kittayapong, Pattamaporn, Ponce García, Gustavo, Flores Suárez, Adriana Elizabeth, Fernández Salas, Ildefonso, Saavedra Rodríguez, Karla Lizet, Reyes Solis, Guadalupe del Carmen, Lozano Fuentes, Saúl, Guillermo Bond, J., Casas Martínez, Mauricio, Ramsey, Janine M., García Rejón, Julián Everardo, Domínguez Galera, Marco Antonio, Ranson, Hilary, Hemingway, Janet, Eisen, Lars, and Black, William C.

Abstract

Background: Aedes aegypti, the ‘yellow fever mosquito’, is the primary vector to humans of dengue and yellow fever flaviviruses (DENV, YFV), and is a known vector of the chikungunya alphavirus (CV). Because vaccines are not yet available for DENV or CV or are inadequately distributed in developing countries (YFV), management of Ae. aegypti remains the primary option to prevent and control outbreaks of the diseases caused by these arboviruses. Permethrin is one of the most widely used active ingredients in insecticides for suppression of adult Ae. aegypti. In 2007, we documented a replacement mutation in codon 1,016 of the voltage-gated sodium channel gene (para) of Ae. aegypti that encodes an isoleucine rather than a valine and confers resistance to permethrin. Ile1,016 segregates as a recessive allele conferring knockdown resistance to homozygous mosquitoes at 5–10 mg of permethrin in bottle bioassays. Methods and Findings: A total of 81 field collections containing 3,951 Ae. aegypti were made throughout Me´xico from 1996 to 2009. These mosquitoes were analyzed for the frequency of the Ile1,016 mutation using a melting-curve PCR assay. Dramatic increases in frequencies of Ile1,016 were recorded from the late 1990’s to 2006–2009 in several states including Nuevo Leo´n in the north, Veracruz on the central Atlantic coast, and Yucata´n, Quintana Roo and Chiapas in the south. From 1996 to 2000, the overall frequency of Ile1,016 was 0.04% (95% confidence interval (CI95) = 0.12%; n = 1,359 mosquitoes examined). The earliest detection of Ile1,016 was in Nuevo Laredo on the U.S. border in 1997. By 2003–2004 the overall frequency of Ile1,016 had increased ,100-fold to 2.7% (60.80% CI95; n = 808). When checked again in 2006, the frequency had increased slightly to 3.9% (61.15% CI95; n = 473). This was followed in 2007–2009 by a sudden jump in Ile1,016 frequency to 33.2% (61.99% CI95; n = 1,074 mosquitoes). There was spatial heterogeneity in Ile1,016 frequencies among 2007–20

Published
2009

63. Estimating dengue vector abundance in the wet and dry season: implications for targeted vector control in urban and peri-urban Asia

Author

Wai, Khin Thet, primary, Arunachalam, Natarajan, additional, Tana, Susilowati, additional, Espino, Fe, additional, Kittayapong, Pattamaporn, additional, Abeyewickreme, W, additional, Hapangama, Dilini, additional, Tyagi, Brij Kishore, additional, Htun, Pe Than, additional, Koyadun, Surachart, additional, Kroeger, Axel, additional, Sommerfeld, Johannes, additional, and Petzold, Max, additional

Published
2012
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64. DengueTools: innovative tools and strategies for the surveillance and control of dengue

Author

Wilder-Smith, Annelies, primary, Renhorn, Karl-Erik, additional, Tissera, Hasitha, additional, Abu Bakar, Sazaly, additional, Alphey, Luke, additional, Kittayapong, Pattamaporn, additional, Lindsay, Steve, additional, Logan, James, additional, Hatz, Christoph, additional, Reiter, Paul, additional, Rocklöv, Joacim, additional, Byass, Peter, additional, R. Louis, Valérie, additional, Tozan, Yesim, additional, Massad, Eduardo, additional, Tenorio, Antonio, additional, Lagneau, Christophe, additional, L'Ambert, Grégory, additional, Brooks, David, additional, Wegerdt, Johannah, additional, and Gubler, Duane, additional

Published
2012
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79. DISPERSAL OF THE DENGUE VECTOR AEDES AEGYPTI WITHIN AND BETWEEN RURAL COMMUNITIES

Author

HARRINGTON, LAURA C., primary, EDMAN, JOHN D., additional, KITTAYAPONG, PATTAMAPORN, additional, COLEMAN, RUSSELL C., additional, CLARK, GARY G., additional, SITHIPRASASNA, RATANA, additional, KITTHAWEE, SANGVORN, additional, LERDTHUSNEE, KRIANGKRAI, additional, SCOTT, THOMAS W., additional, COSTERO, ADRIANA, additional, and JONES, JAMES J., additional

Published
2005
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93. ScienceAsia

Author

Kittayapong, Pattamaporn, primary, Milne, John R, additional, Tigvattananont, Saen, additional, and Baimai, Visut, additional

Published
2000
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