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Zheng SJ, García-Bastidas FA, Li X, Zeng L, Bai T, Xu S, Yin K, Li H, Fu G, Yu Y, Yang L, Nguyen HC, Douangboupha B, Khaing AA, Drenth A, Seidl MF, Meijer HJG, Kema GHJ. New Geographical Insights of the Latest Expansion of Fusarium oxysporum f.sp. cubense Tropical Race 4 Into the Greater Mekong Subregion. Front Plant Sci 2018; 9:457. [PMID: 29686692 PMCID: PMC5900031 DOI: 10.3389/fpls.2018.00457] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 03/22/2018] [Indexed: 05/20/2023]
Abstract
Banana is the most popular and most exported fruit and also a major food crop for millions of people around the world. Despite its importance and the presence of serious disease threats, research into this crop is limited. One of those is Panama disease or Fusarium wilt. In the previous century Fusarium wilt wiped out the "Gros Michel" based banana industry in Central America. The epidemic was eventually quenched by planting "Cavendish" bananas. However, 50 years ago the disease recurred, but now on "Cavendish" bananas. Since then the disease has spread across South-East Asia, to the Middle-East and the Indian subcontinent and leaped into Africa. Here, we report the presence of Fusarium oxysporum f.sp. cubense Tropical Race 4 (Foc TR4) in "Cavendish" plantations in Laos, Myanmar, and Vietnam. A combination of classical morphology, DNA sequencing, and phenotyping assays revealed a very close relationship between the Foc TR4 strains in the entire Greater Mekong Subregion (GMS), which is increasingly prone to intensive banana production. Analyses of single-nucleotide polymorphisms enabled us to initiate a phylogeography of Foc TR4 across three geographical areas-GMS, Indian subcontinent, and the Middle East revealing three distinct Foc TR4 sub-lineages. Collectively, our data place these new incursions in a broader agroecological context and underscore the need for awareness campaigns and the implementation of validated quarantine measures to prevent further international dissemination of Foc TR4.
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Affiliation(s)
- Si-Jun Zheng
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
- Bioversity International, Kunming, China
- *Correspondence: Si-Jun Zheng
| | - Fernando A. García-Bastidas
- Wageningen University and Research, Wageningen Plant Research, Wageningen, Netherlands
- Wageningen University and Research, Laboratory of Phytopathology, Wageningen, Netherlands
| | - Xundong Li
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Li Zeng
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Tingting Bai
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Shengtao Xu
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Kesuo Yin
- Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Hongxiang Li
- Xishuangbanna Dai Autonomous Prefecture, Plant Quarantine and Protection Station, Jinghong, China
| | - Gang Fu
- Institute of Microbiology, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Yanchun Yu
- Institute of Tropical and Subtropical Industry Crops, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Liu Yang
- Institute of Biotechnology, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Huy Chung Nguyen
- Plant Protection Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Bounneuang Douangboupha
- Ministry of Agriculture & Forestry, National Agriculture & Forestry Research Institute, Horticulture Research Center, Vientiane, Laos
| | | | - Andre Drenth
- Centre for Horticultural Science, The University of Queensland, Brisbane, QLD, Australia
| | - Michael F. Seidl
- Wageningen University and Research, Laboratory of Phytopathology, Wageningen, Netherlands
| | - Harold J. G. Meijer
- Wageningen University and Research, Wageningen Plant Research, Wageningen, Netherlands
| | - Gert H. J. Kema
- Wageningen University and Research, Wageningen Plant Research, Wageningen, Netherlands
- Wageningen University and Research, Laboratory of Phytopathology, Wageningen, Netherlands
- *Correspondence: Si-Jun Zheng
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Yin Y, Li X, Chu D, Zhao X, Sathya K, Douangboupha B, Kyaw MM, Kongchuensin M, Somrith A, Ngo VV, Nguyen HC, Shen S, Liu S, Chen A. Extensive gene flow of white-backed planthopper in the Greater Mekong Subregion as revealed by microsatellite markers. Sci Rep 2017; 7:15905. [PMID: 29162915 PMCID: PMC5698459 DOI: 10.1038/s41598-017-16164-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 11/07/2017] [Indexed: 11/25/2022] Open
Abstract
The white-backed planthopper (WBPH), Sogatella furcifera (Horváth), is a destructive pest of rice in the Greater Mekong Subregion (GMS) countries including Cambodia, Laos, Myanmar, Thailand, Vietnam, and China’s Yunnan Province. Our previous study not only confirmed the immigration sources of the WBPH in China’s Yunnan Province were from Myanmar, Vietnam, and Laos, but also indicated that Cambodia was likely an additional migration source. To further clarify the migration sources and patterns of the WBPH in the GMS, we investigated the genetic structure of 42 WBPH populations using microsatellite loci markers. The analysis of genetic diversity, heterozygosity deficit, and heterozygosity excess based on the nuclear markers suggest that there is extensive gene flow between the 42 sampled populations from the GMS. The genetic structure confirmed the immigration sources of WBPH as revealed by mitochondrial markers and trajectory analyses methods in previous studies. These findings will aid in the sustainable regional management of this insect pest in the GMS.
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Affiliation(s)
- Yanqiong Yin
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Xiangyong Li
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Dong Chu
- Key Lab of Integrated Crop Pest Management of Shandong Province, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xueqing Zhao
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Khay Sathya
- Plant Protection Office, Cambodian Agricultural Research and Development Institute, Phnom Penh, 01, Cambodia
| | - Bounneuang Douangboupha
- Horticulture Research Center, National Agriculture and Forestry Research Institute, Vientiane, 7170, Lao PDR
| | - Mu Mu Kyaw
- Department of Agricultural Research, Ministry of Agriculture and Irrigation, Nay Pyi Taw, Myanmar
| | - Manita Kongchuensin
- Plant Protection Research and Development Office, Department of Agriculture, Bangkok, 10170, Thailand
| | - Apirusht Somrith
- Plant Protection Research and Development Office, Department of Agriculture, Bangkok, 10170, Thailand
| | - Vinh Vien Ngo
- Plant Protection Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Huy Chung Nguyen
- Plant Protection Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Shicai Shen
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Shufang Liu
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Aidong Chen
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China.
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Brown PR, Douangboupha B, Htwe NM, Jacob J, Mulungu L, My Phung NT, Singleton GR, Stuart AM, maji S. Control of rodent pests in rice cultivation. Achieving sustainable cultivation of rice Volume 2 2017. [DOI: 10.19103/as.2016.0003.24] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Li XY, Chu D, Yin YQ, Zhao XQ, Chen AD, Khay S, Douangboupha B, Kyaw MM, Kongchuensin M, Ngo VV, Nguyen CH. Possible Source Populations of the White-backed Planthopper in the Greater Mekong Subregion Revealed by Mitochondrial DNA Analysis. Sci Rep 2016; 6:39167. [PMID: 27991532 PMCID: PMC5171772 DOI: 10.1038/srep39167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 11/18/2016] [Indexed: 11/23/2022] Open
Abstract
The white-backed planthopper, Sogatella furcifera (Horváth) (Hemiptera: Delphacidae), is a serious pest of rice in Asia. However, little is known regarding the migration of this pest insect from the Greater Mekong Subregion (GMS) including Cambodia, Laos, Myanmar (Burma), Thailand, and Vietnam, into China’s Yunnan Province. To determine the migration patterns of S. furcifera in the GMS and putative secondary immigration inside China’s Yunnan Province, we investigated the population genetic diversity, genetic structure, and gene flow of 42 S. furcifera populations across the six countries in the GMS by intensive sampling using mitochondrial genes. Our study revealed the potential emigration of S. furcifera from the GMS consists primarily of three major sources: 1) the S. furcifera from Laos and Vietnam migrate into south and southeast Yunnan, where they proceed to further migrate into northeast and central Yunnan; 2) the S. furcifera from Myanmar migrate into west Yunnan, and/or central Yunnan, and/or northeast Yunnan; 3) the S. furcifera from Cambodia migrate into southwest Yunnan, where the populations can migrate further into central Yunnan. The new data will not only be helpful in predicting population dynamics of the planthopper, but will also aid in regional control programs for this economically important pest insect.
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Affiliation(s)
- Xiang-Yong Li
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Dong Chu
- Key Lab of Integrated Crop Pest Management of Shandong Province, College of Agronomy and Plant Protection, Qingdao Agricultural University, Qingdao 266109, China
| | - Yan-Qiong Yin
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Xue-Qing Zhao
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Ai-Dong Chen
- Agriculture Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Sathya Khay
- Plant Protection Office, Cambodian Agricultural Research and Development Institute, Phnom Penh 01, Cambodia
| | - Bounneuang Douangboupha
- Horticulture Research Center, National Agriculture and Forestry Research Institute, Vientiane 7170, Lao PDR
| | - Mu Mu Kyaw
- Department of Agricultural Research, Ministry of Agriculture and Irrigation, Nay Pyi Taw, Myanmar
| | - Manita Kongchuensin
- Plant Protection Research and Development Office, Department of Agriculture, Bangkok 10170, Thailand
| | - Vien Vinh Ngo
- Plant Protection Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Chung Huy Nguyen
- Plant Protection Research Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
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Hugot JP, Feliu C, Douangboupha B, Ribas A. Laoxyuris laonasti n. gen., n. sp. (Nematoda: Syphaciinae) parasite of Laonastes aenigmamus (Rodentia: Diatomyidae): morphology, biology, taxonomy, phylogeny. Infect Genet Evol 2013; 16:113-21. [PMID: 23357582 DOI: 10.1016/j.meegid.2013.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/29/2012] [Accepted: 01/02/2013] [Indexed: 11/26/2022]
Abstract
A new Oxyurid genus and species are described in a rodent recently discovered in Lao PDR: Laonastes aenigmamus which happens to be the single survivor of the Diatomyidae, a family considered to be extinct since the Miocene. The morphological characters of the new parasite species allow classifying it within the Syphaciinae Railliet, 1916, a subfamily whose members are exclusively parasites of Lagomorpha and Rodents. Male Syphaciinae have developed several types of ventral cuticular ornamentation used to firmly grip the female during mating. The ornamental characters observed in the new species include a finger like appendix, which, until now, has not been described in the subfamily. The originality of this apparatus justifies the creation of a new genus and a new species for the pinworm parasite of Laonastes. Using morphological characters, the new species is analyzed phylogenetically to describe its affinities with representatives of the main groups distinguished within the Syphaciinae. The phylogenetic study produces a cladogram similar to the phylogeny recently proposed for the hosts of the subfamily and in agreement with a close association of the Diatomyidae with the Ctenodactylidae. Such a phenomenon of cophylogeny is interpreted as the result of the existence of a strict specificity between the Syphaciinae and their respective hosts, due to the very close adaptation of their life cycle with the behaviors of their hosts. In Lagomorpha and Rodents, caecotrophy and grooming activities allow a direct transmission of the parasite eggs and favor successive self-infestations, increasing the chances for the parasite to maintain itself in the same host species but decreasing the probability of host switching. The resulting high host specificity allowed the Syphaciinae to out-compete other pinworms and maintain themselves in their specific host over millions of years.
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Affiliation(s)
- Jean Pierre Hugot
- Muséum National d'Histoire naturelle, UMR CNRS 7205, 55 rue Buffon, 75231 Paris, France.
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Nicolas V, Herbreteau V, Couloux A, Keovichit K, Douangboupha B, Hugot JP. A remarkable case of micro-endemism in Laonastes aenigmamus (Diatomyidae, Rodentia) revealed by nuclear and mitochondrial DNA sequence data. PLoS One 2012; 7:e48145. [PMID: 23155377 PMCID: PMC3498270 DOI: 10.1371/journal.pone.0048145] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 09/20/2012] [Indexed: 11/19/2022] Open
Abstract
L. aenigmamus is endemic to the limestone formations of the Khammuan Province (Lao PDR), and is strongly specialized ecologically. From the survey of 137 individuals collected from 38 localities, we studied the phylogeography of this species using one mitochondrial (Cyt b) and two nuclear genes (BFIBR and GHR). Cyt b analyses reveal a strong mtDNA phylogeographical structure: 8 major geographical clades differing by 5-14% sequence divergence were identified, most of them corresponding to distinct karst areas. Nuclear markers display congruent results but with a less genetic structuring. Together, the data strongly suggest an inland insular model for Laonastes population structure. With 8 to 16 evolutionary significant units in a small area (about 200×50 km) this represents an exceptional example of micro-endemism. Our results suggest that L. aenigmamus may represent a complex of species and/or sub-species. The common ancestor of all Laonastes may have been widely distributed within the limestone formations of the Khammuan Province at the end of Miocene/beginning of the Pliocene. Parallel events of karst fragmentation and population isolation would have occurred during the Pleistocene or/and the end of the Pliocene. The limited gene flow detected between populations from different karst blocks restrains the likelihood of survival of Laonastes. This work increases the necessity for a strict protection of this rare animal and its habitat and provides exclusive information, essential to the organization of its protection.
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Affiliation(s)
- Violaine Nicolas
- UMR CNRS 7205, Département Systématique et Evolution, Muséum National d'Histoire Naturelle, Paris, France.
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Milocco C, Kamyingkird K, Desquesnes M, Jittapalapong S, Herbreteau V, Chaval Y, Douangboupha B, Morand S. Molecular demonstration of Trypanosoma evansi and Trypanosoma lewisi DNA in wild rodents from Cambodia, Lao PDR and Thailand. Transbound Emerg Dis 2012; 60:17-26. [PMID: 22321449 DOI: 10.1111/j.1865-1682.2012.01314.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this study, we investigated the molecular evidence of Trypanosoma evansi in wild rodents from Cambodia, Lao PDR and Thailand. Between November 2007 and June 2009, 1664 rodents were trapped at eight sites representative of various ecological habitats. Of those animals, 94 were tested by direct microscopic blood examination, 633 using the Card Agglutination Test for Trypanosomes (CATT/T. evansi) and 145 by Polymerase Chain Reaction (PCR) with two sets of primers: TRYP1 (amplifying ITS1 of ribosomal DNA of all trypanosomes) and TBR (amplifying satellite genomic DNA of Trypanozoon parasites). Using TRYP1, based on the size of the PCR products, 15 samples from the three countries were positive for Trypanosoma lewisi (two were confirmed by sequencing), and three were positive for Trypanozoon (one was confirmed by sequencing and three by TBR primers); the specificity of the primers failed as rodent DNA was amplified in some cases. Using TBR, six samples were positive for Trypanozoon (one was confirmed by sequencing); as T. evansi is the only species of the Trypanozoon sub-genus possibly present in Asian rodents, these results confirmed its presence in rodents from Thailand (Rattus tanezumi) and Cambodia (R. tanezumi, Niviventer fulvescens & Maxomys surifer). Further investigations are necessary to establish the situation in Lao PDR. None of the 16 samples most strongly positive to the CATT proved to be positive for Trypanozoon by PCR. The merits of the CATT for such studies were not confirmed. Studying the urban and rural circulation of these parasites in rodents will enable an evaluation of human exposure and infection risk, as human infections by T. evansi were recently described in India and by T. lewisi in India and Thailand. As sequencing PCR products is expensive, the development of new molecular and serological tools for rodents would be very useful.
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Affiliation(s)
- C Milocco
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier, France
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Blasdell KR, Morand S, Chaval Y, Herbreteau V, Douangboupha B, Jittapalapong S, Cosson JF, Buchy P. Hantaviruses and the dilution effect in Southeast Asia. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p53] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Blasdell K, Cosson JF, Chaval Y, Herbreteau V, Douangboupha B, Jittapalapong S, Lundqvist A, Hugot JP, Morand S, Buchy P. Rodent-borne hantaviruses in Cambodia, Lao PDR, and Thailand. Ecohealth 2011; 8:432-443. [PMID: 22124701 DOI: 10.1007/s10393-011-0725-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 11/01/2011] [Accepted: 11/04/2011] [Indexed: 05/31/2023]
Abstract
In order to evaluate the circulation of hantaviruses present in southeast Asia, a large scale survey of small mammal species was carried out at seven main sites in the region (Cambodia, Lao People's Democratic Republic, and Thailand). Small scale opportunistic trapping was also performed at an eighth site (Cambodia). Using a standard IFA test, IgG antibodies reacting to Hantaan virus antigens were detected at six sites. Antibody prevalence at each site varied from 0 to 5.6% with antibodies detected in several rodent species (Bandicota indica, B. savilei, Maxomys surifer, Mus caroli, M. cookii, Rattus exulans, R. nitidius, R. norvegicus, and R. tanezumi). When site seroprevalence was compared with site species richness, seropositive animals were found more frequently at sites with lower species richness. In order to confirm which hantavirus species were present, a subset of samples was also subjected to RT-PCR. Hantaviral RNA was detected at a single site from each country. Sequencing confirmed the presence of two hantavirus species, Thailand and Seoul viruses, including one sample (from Lao PDR) representing a highly divergent strain of Seoul virus. This is the first molecular evidence of hantavirus in Lao PDR and the first reported L segment sequence data for Thailand virus.
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Affiliation(s)
- Kim Blasdell
- Virology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia
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Rivière-Dobigny T, Herbreteau V, Khamsavath K, Douangboupha B, Morand S, Michaux JR, Hugot JP. Preliminary assessment of the genetic population structure of the enigmatic speciesLaonastes aenigmamus(Rodentia: Diatomyidae). J Mammal 2011. [DOI: 10.1644/10-mamm-a-028.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Blasdell KR, Morand S, Chaval Y, Herbreteau V, Douangboupha B, Jittapalapong S, Cosson JF, Buchy P. Hantaviruses and the dilution effect in Southeast Asia. BMC Proc 2011. [PMCID: PMC3019480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- KR Blasdell
- Institut Pasteur du Cambodge, Unité de Virologie, Phnom Penh, Cambodia,Institut des Sciences de l'Evolution, CNRS, IRD, Université Montpellier 2, 34095 Montpellier, France
| | - S Morand
- Institut des Sciences de l'Evolution, CNRS, IRD, Université Montpellier 2, 34095 Montpellier, France
| | - Y Chaval
- Centre de Biologie et de Gestion et des Populations (CBGP), International de Baillarguet, 34988 Montferrier sur lez, France
| | - V Herbreteau
- CIRAD, UR AGIRs (Animal et Gestion Intégrée des Risques), Campus International de Baillarguet, Montpellier, France
| | - B Douangboupha
- National Agricultural Research Centre, National Agricultural and Forestry Research Institute, Vientiane, Lao PDR
| | - S Jittapalapong
- Department of Parasitology, Faculty of Veterinary Medicine, Kasetsart University, Bangkock 10900, Thailand
| | - JF Cosson
- INRA, UMR CBGP (INRA/IRD/CIRAD/Montpellier SupAgro), Campus international de Baillarguet, 34988 Montferrier sur Lez, France
| | - P Buchy
- Institut Pasteur du Cambodge, Unité de Virologie, Phnom Penh, Cambodia
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