Areas Of Laos Research Articles

Measurement of Fluoride Concentrations of Ground-Water in Primary and Secondary Schools in Five Areas of Laos

Measurement of Fluoride Concentrations of Ground-Water in Primary and Secondary Schools in Five Areas of Laos

Flood Analysis Using Multi-Scale Remote Sensing Observations in Laos

Heavy rains usually hit Laos countrywide and cause serious floods, influencing local agriculture, households, and the economy. Therefore, it is crucial to monitor the flooding in Laos to better understand the flood patterns and characteristics. This paper aims to analyze the influence of the flooding in Laos with multi-source data, e.g., Synthetic Aperture Radar (SAR), optical multi-spectral images, and geographic information system data. First, the flood areas in Laos from 2018 to 2022 are detected using a decision fusion method. Based on the flood areas and the global Land Use/Land Cover (LULC) product, the macro scale global impact of the flood is analyzed. Second, taking the Vientiane Capital as a case study area, a flood forecasting method is applied to estimate the risk of flooding. Finally, optical images before and after the flood event are extracted for a close-up comparison at the micro scale. Based on the above multi-scale analysis, floods in Laos are found to be predominantly concentrated in the flat areas near the Mekong River, with a decreasing trend over time, which could be helpful for flood management and mitigation strategies in Laos. The validation results exhibited notable average indices across a five-year period, with mIoU (0.7782), F1 score (0.7255), and overall accuracy (0.9854), respectively.

Detection of Schistosoma mekongi DNA in Human Stool and Intermediate Host Snail Neotricula aperta via Loop-Mediated Isothermal Amplification Assay in Lao PDR.

Schistosomiasis mekongi infection represents a public health concern in Laos and Cambodia. While both countries have made significant progress in disease control over the past few decades, eradication has not yet been achieved. Recently, several studies reported the application of loop-mediated isothermal amplification (LAMP) for detecting Schistosoma DNA in low-transmission settings. The objective of this study was to develop a LAMP assay for Schistosoma mekongi using a simple DNA extraction method. In particular, we evaluated the utility of the LAMP assay for detecting S. mekongi DNA in human stool and snail samples in endemic areas in Laos. We then used the LAMP assay results to develop a risk map for monitoring schistosomiasis mekongi and preventing epidemics. A total of 272 stool samples were collected from villagers on Khon Island in the southern part of Laos in 2016. DNA for LAMP assays was extracted via the hot-alkaline method. Following the Kato-Katz method, we determined that 0.4% (1/272) of the stool samples were positive for S. mekongi eggs, as opposed to 2.9% (8/272) for S. mekongi DNA based on the LAMP assays. Snail samples (n = 11,762) were annually collected along the riverside of Khon Island from 2016 to 2018. DNA was extracted from pooled snails as per the hot-alkaline method. The LAMP assay indicated that the prevalence of S. mekongi in snails was 0.26% in 2016, 0.08% in 2017, and less than 0.03% in 2018. Based on the LAMP assay results, a risk map for schistosomiasis with kernel density estimation was created, and the distribution of positive individuals and snails was consistent. In a subsequent survey of residents, schistosomiasis prevalence among villagers with latrines at home was lower than that among villagers without latrines. This is the first study to develop and evaluate a LAMP assay for S. mekongi detection in stools and snails. Our findings indicate that the LAMP assay is an effective method for monitoring pathogen prevalence and creating risk maps for schistosomiasis.

The determinants of bushmeat consumption in urban areas in Laos

This study aims to examine the determinants of bushmeat consumption in urban areas in Laos. Men consume more bushmeat than women. Job, the government official was the major bushmeat consumer, but there was no proven by statistical approaches from this study we have done. The education of people who consume bushmeat has finished high school level. Ethnic, Lao Loum people have a negative impact on bushmeat consumption, but for Hmong or Lao Theung people, bushmeat is a long tradition of eating and being a major food source. In addition, believing in eating bushmeat can make people healthy is also valid.

Understanding Discrepancies in Nutritional Outcomes Among Under-Fives in Laos: A Mixed-Methods Study Using the Positive Deviance Approach.

Background:Stunting is one of the main contributing factors in the under-five mortality rate worldwide. In Laos, the prevalence of stunting remains high, particularly in mountainous rural areas. To prevent stunting, insight into positive deviant behaviors can help understand how people can cope or adapt in resource-poor settings.Objective:This study aims to analyze the practices and underlying factors that explain discrepancies in nutritional outcomes in children under the age of 5 in remote mountainous areas in Laos.Methods:This mixed-methods study included all children under the age of 5 living in 6 selected villages. Anthropometric measurements were taken, and a Z-score for stunting was calculated to select the positive and negative deviant children. To identify the causes of discrepancies in childhood stunting, household questionnaires, focus group discussions, observations, and individual interviews with family members and health workers were conducted.Results:Fifty-five percent of children were stunted. Inappropriate care and feeding practices were observed such as providing unbalanced diets and not attending health facilities. Positive deviant mothers were less likely to follow inappropriate practices, experienced less food insecurity, and had higher motivation and autonomy, which resulted in prioritizing their children’s health. An active role of fathers seemed to benefit positive practices within households.Conclusions:The combination of many different practices in which positive deviant families are doing slightly better was associated with in less stunting of children. Those practices are related to the household resources, such as access to food and social support; and the mother’s motivation, autonomy, and perspectives on child health.

Willingness to Pay for Conservation of the Asian Elephant in Nakai Nam Theun National Protected Area in Laos

Willingness to Pay for Conservation of the Asian Elephant in Nakai Nam Theun National Protected Area in Laos

Land-Use Change and Efficiency in Laos’ Special Economic Zones

Special economic zones (SEZs) are important in Laos due to their ability to attract foreign investment, realize industrialization, and promote economic globalization. Based on Laos’ SEZs in operation, this study explored land-use intensity, structural evolution and land-use efficiency in Laos’ SEZs via the land-use dynamic degree, information entropy, super-efficiency data envelopment analysis (DEA) and gray relational analysis (GRA). The study determined that the total land-use area in Laos’ SEZs continuously increased from 2014 to 2020. The land-use intensity changes in the SEZs can be divided into three types, i.e., high intensity, medium intensity and low intensity, and most SEZs belonged to the medium-intensity type. The proportion of land used in production systems in Laos’ SEZs increased the most, and the proportion of infrastructure land notably decreased. The overall information entropy of the land-use structure exhibited an initial downward and then an upward trend. In 2018, the land-use efficiency in the Savan-Seno SEZ, Vientiane Industrial and Trade Area, Dongphosy SEZ, and Golden Triangle SEZ was relatively optimal. The basic factors of the industrial space and the factors reflecting international cooperation attributes were highly related to the land-use efficiency in Laos’ SEZs.

Factors affecting the choice of delivery place in a rural area in Laos: A qualitative analysis.

BackgroundHome delivery (HD) without skilled birth attendants (SBAs) are considered crucial risk factors increasing maternal and child mortality rates in Loa PDR. While a few studies in the literature discuss the choice of delivery in remote areas of minority ethnic groups; our work aims to identify factors that indicated their delivery place, at home or in the health facilities.MethodsA community-based qualitative study was conducted between February and March 2020. Three types of interviews were implemented, In-depth interviews with 16 women of eight rural villages who delivered in the last 12 months in Xepon District, Savannakhet Province, Lao PDR. Also, three focus group discussions (FGDs) with nine HCPs and key-informant interviews of ten VHVs were managed. Factors affecting the choice of the delivery place were categorized according to the social-ecological model.ResultsOur sample included five Tri women and two Mangkong women in the HD group, while the FD group included three Tri women, two Mangkong women, one Phoutai woman, two Laolung women and one Vietnamese. Our investigation inside the targeted minority showed that both positive perceptions of home delivery (HD) and low-risk perception minorities were the main reasons for the choice of HD, on the individual level. On the other hand, fear of complication, the experience of stillbirth, and prolonged labour pain during HD were reasons for facility-based delivery (FD). Notably, the women in our minority reported no link between their preference and their language, while the HCPs dated the low knowledge to the language barrier. On the interpersonal level, the FD women had better communication with their families, and better preparation for delivery compared to the HD group. The FD family prepared cash and transportation using their social network. At the community level, the trend of the delivery place had shifted from HD to FD. Improved accessibility and increased knowledge through community health education were the factors of the trend. At the societal (national policy) level, the free delivery policy and limitation of HCPs’ assisted childbirth only in health facilities were the factors of increasing FD, while the absence of other incentives like transportation and food allowance was the factor of remaining of HD.ConclusionsBased on the main findings of this study, we urge the enhancement of family communication on birth preparedness and birthplace. Furthermore, our findings support the need to educate mothers, especially those of younger ages, about their best options regarding the place of delivery. We propose implementing secondary services of HD to minimize the emergency risks of HD. We encourage local authorities to be aware of the medical needs of the community especially those of pregnant females and their right for a free delivery policy.

New insights into malaria vector bionomics in Lao PDR: a nationwide entomology survey

BackgroundIn Laos, the malaria burden remains high despite a significant reduction of cases during the last decade. In the context of the disease elimination by 2030, a nationwide entomological survey was conducted to better understand the distribution, abundance and behaviour of major malaria vectors (Anopheles spp.) in the country.MethodsMosquito collections were implemented in ten villages from ten provinces during the rainy and dry seasons of 2014 and 2015 by using human landing catch (HLC) and cow bait collection (CBC) methods. After morphological identification in the field, molecular identification of the sibling species of Anopheles mosquitoes from the Funestus, Leucosphyrus, and Maculatus groups were determined using PCR specific alleles. A screening of Plasmodium falciparum and Plasmodium vivax infections in the vectors was carried out by quantitative PCR assays.ResultsA total of 14,146 adult mosquitoes representing 25 different Anopheles species were collected and morphologically identified. Molecular identification revealed the presence of 12 sibling species within the main primary vector groups, including Anopheles maculatus, Anopheles rampae, Anopheles sawadwongporni, Anopheles pseudowillmori, Anopheles dravidicus, Anopheles minimus, Anopheles aconitus, Anopheles pampanai, Anopheles harrisoni, Anopheles dirus, Anopheles baimaii, Anopheles nemophilous. Anopheles maculatus and An. minimus were predominant during both the dry and rainy seasons, but showed highly zoophilic preferences (Zoophilic index of 98% and 95%, respectively). Overall, 22% of the total malaria vectors were collected between 10:00 PM and 5:00 AM indoors when people are sleeping. Twenty-seven percent of primary and secondary vectors were collected outdoors before 10:00 PM or after 5:00 AM, times when people are usually awake and outdoors. Only two specimens were positive for P. falciparum, one An. aconitus from Phongsaly and one An. minimus from Vientiane ProvinceConclusionsThe results indicate that people living in rural areas in Laos are constantly exposed to malaria vectors throughout the year and specifically outdoors. The use of LLINs/IRS remains important but innovative tools and new strategies are needed to address locally, the early and outdoor malaria transmission. Lack of expertise in general entomological methods may further exacerbate the situation.

A new freshwater snail (Gastropoda, Pomatiopsidae) endemic to Fuxian Lake (Yunnan, China) identified, based on morphological and DNA evidence.

BackgroundLacunopsis Deshayes, 1876 is restricted to South Asia and shows a remarkable regional distribution. Fifteen species have been reported from the lower Mekong River area of Laos, Cambodia, Thailand and Vietnam. Two species, Lacunopsis auris Y.-Y. Liu, Y.-X. Wang & W.-Z. Zhang, 1980 and L. yunnanensis Y.-Y. Liu, Y.-X. Wang & W.-Z. Zhang, 1980 occur in the Yunnan Province of China. The most recent treatments of Lacunopsis date back to the 1970s and 1980s, therefore detailed information on anatomy and DNA analysis is lacking.New informationA new species of freshwater snail (Gastropoda, Pomatiopsidae), L. yuxiensis sp. nov., is described, based on samples collected from Fuxian Lake (Yunnan, China). The new species is characterised by a solid and dark red shell with yellow spiral ribs on the whorls, reminiscent of marine gastropods of the family Trochidae. In addition to a description of the shell morphology and radula, molecular data are presented for the first time. This compilation of faunal and taxonomic data provides relevant information for use in conservation efforts. Additional molecular data may prove helpful for both refining current knowledge on the morphological variability within this species and verifying the degree of cryptic diversity of this genus.

Factor structure, measurement invariance, and construct validity of MELQO measure of child development and early learning in Laos

ABSTRACT Early learning interventions are widely implemented in developing countries yet instruments to reliably measure the effects of such programs on children’s development and learning in specific contexts are needed. This study examines the measurement properties of a globally-informed instrument adapted to measure school readiness in Laotian children from ethnolinguistic minorities. Data come from a subsample of children (n = 1469, mean age = 4.67 years) in two larger studies to promote children’s school readiness in rural areas in Laos. This study (a) uses exploratory and confirmatory factor analysis to evaluate the factor structure of the measure, (b) tests measurement invariance across ethnolinguistic and age groups, and c) examines the construct validity using demographic variables known to predict school readiness. Results indicate eight factors compatible with subtasks in the Numeracy, Executive Function, and Vocabulary domains, but not with a Literacy domain, and it is useful for making inferences regarding school readiness from children across ethnolinguistic and age groups. Family SES, parents’ education, child gender, and age were associated with several domains of children’s school readiness. Results are discussed with respect to the importance of assessing children in their first language to help reduce the ethnolinguistic disparity in children’s school readiness performance.

Habitats of authenticity: the ecological crisis, world-ecological praxeology and the capital structure of ‘uncapitalized’ spaces

ABSTRACT The ecological crisis is a social crisis that undermines not just the relation between humans and the environment but the whole of human relations to themselves, to other humans, and to nonhumans. Addressing the paradox of unabated crisis escalation despite increasing widespread awareness and reflexivity, we argue that the crisis is in its core a crisis of capital(s) as metabolic relation(s). Its unfolding spurs the desire of particular social milieus to create ‘habitats of authenticity,’ that is, spaces untouched by capital. However, such counter-practices are embedded in cultural class struggles (e.g. distinctive lifestyles), which tends to reproduce the dominative nature relations they claim to overcome. Centering on the concept of capital as practice, we develop a theoretical framework based on an integration of Moore’s world-ecology, Bourdieu’s praxeology, and Critical Theory to conceptually address this paradox. We apply this ‘world-ecological praxeology’ in two case studies – –one from the Global South (Nam Ha National Protected Area in Laos) and one from the Global North (Tempelhofer Feld in Berlin, Germany). The article shows that despite unintended and paradoxical effects, such practices still carry a critical and progressive potential.

Management of epilepsy in Laos: Perceptions of healthcare professionals from Vientiane Capital province and traditional healers in Southern Laos

Background and aimTraditional practices are deeply rooted in Lao people’s perceptions and beliefs about health and illness.The objective of the study was to understand the perceptions of healthcare professionals and traditional healers regarding the management of epilepsy in Laos, and their reciprocal views. Experimental procedureAn observational study was carried out in two areas of Laos from February to May 2017. Semi directive questionnaires were used to collect quantitative and qualitative data. Semiotic square was carried out to highlight relationships between attitudes of traditional healers and healthcare professionals. For quantitative approach, the proportions were reported, and the test used was Fisher’s test for nominal variables. The mean and standard deviation expressed the continuous variables and the Student’s t-test was used. Results and conclusionEpilepsy was cited by 90.9% of traditional healers as a convulsive disease with saliva or urine, and herbal medicines were predominantly used (86.4%) to treat it. Few healthcare professionals (26.5%) pointed out that they knew remedies to treat epilepsy other than antiepileptic drugs (AEDs), and 76.5% of healthcare professionals mentioned that epilepsy was a disease which only AEDs could treat. On the other hand, 54.5% of traditional healers confirmed a traditional remedy could cure completely epilepsy through long-term use. Ninety percent of traditional healers said the collaboration with healthcare professionals was a good idea and 44.1% of the healthcare professionals group said was complicated.The combination of these medicines for the management of epilepsy needs to be adapted to Lao’s medical context.

Land Use and Land Cover Changes during the Second Indochina War and Their Long-Term Impact on a Hilly Area in Laos

Land Use and Land Cover Changes during the Second Indochina War and Their Long-Term Impact on a Hilly Area in Laos

Implementing large Foot and Mouth Disease vaccination programmes for smallholder farmers: lessons from Lao PDR.

This study assessed smallholder finances and their attitudes towards the Foot and Mouth Disease (FMD) vaccination programme, when 1 620 000 vaccine doses were provided for strategic administration in large ruminants in FMD 'high-risk' areas in Laos between 2012 and 2016. Farmers (n = 168) in the provinces of Xayyabouli (XYL), Xiengkhoung (XK) and Huaphan (HP), were interviewed. Over 91% of the farmers responded that their livestock were vaccinated for FMD, with over 86% ranking FMD vaccination as a good or very good intervention. No FMD cases were reported from the vaccinated provinces after May 2013. Examination of the total income per household in XYL, XK and HP indicated earnings of US$5060(±650), US$4260(±294) and US$1691(±676), respectively (P = 0.001), with 23%, 28% and 68% of the total incomes from annual sales of large ruminant, respectively. Of the farmers in XYL, XK and HP, 83%, 93% and 70% (P = 0.009) said their annual income increased compared with 2012, and 47%, 64% and 41%, respectively (P = 0.005), indicated this increase was from additional large ruminant sales. The study indicated that this large FMD vaccination programme was well regarded by participating farmers and may have provided satisfactory suppression of the disease in Laos, despite not achieving the preferred vaccination coverage. Continuation of the vaccination programme in FMD high-risk areas is suggested as desirable.

Biochronological and palaeobiogeographical significance of the earliest Miocene mammal fauna from Northern Vietnam

Current scientific knowledge of Tertiary fossils from south of the Ailao Shan-Red River shear zone is extremely poor, in sharp contrast with the situation nowadays, as the area of Laos and Vietnam is regarded as a global hotspot of biodiversity. In this context, the few localities that yielded fossil assemblages are of first importance for the understanding of Cenozoic palaeobiogeography and the tectonic and palaeogeographical evolution of the region. Hang Mon 1 (Son La Province, Northern Vietnam) was the first site that provided evidence of Tertiary mammals, but its age remained very controversial, interpretations ranging from Oligocene to Late Miocene. Herein, we re-investigate the mammal fauna of the locality based on newly collected material and previously published fossil mammals. A new outcrop, Hang Mon 2, provides evidence of the rhinoceroses Pleuroceros blanfordi and Bugtirhinus sp. Together with the earlier finds of uncommonly small-sized Protaceratherium, these fossils allow a correlation to the earliest Miocene (most probably ranging from ~23 to ~21 Ma; Aquitanian) based on faunal comparison with the Sulaiman Province of Pakistan. The revision of the mammals from Hang Mon 1 is in agreement with this stratigraphic proposal. In addition, the discoveries from Vietnam (the rhinocerotid assemblage and Hyotherium) further support the hypothesis of strong biogeographical and environmental affinities between Europe, the Indian Subcontinent and Southeast Asia (Vietnam) during the Aquitanian.

Assessing Equity in Protected Area Governance: Approaches to Promote Just and Effective Conservation

AbstractWith the inclusion of equity concerns in Aichi Target 11 of the Convention on Biological Diversity, equitable management has become an important objective for the world's protected areas. The way equity is defined and operationalized influences whether this strategic shift can help identify pathways commensurate with conservation effectiveness. We examined equity around a protected area in Laos, combining quantitative and qualitative methods to explore the three dimensions of procedure, recognition, and distribution. Local understandings of equity depended on discrete, evolving issues, with attention to informal decision making and dynamic values required to uncover suitable solutions. We show that equity definitions focused on material distribution and assessments reliant on standardized indicators may result in inadequate responses that sustain local perceptions of inequitable management and miss opportunities for effective conservation. Equity should be considered a management goal to continually adapt toward, informed by stakeholder dialogue.

The research and practice of integrating conservation and development: Self-reflections by researchers on methodologies, objectives and influence

This study examines the application of mixed-method and participatory approaches to conservation and development research. Both approaches were applied in a research project on the relationship between ecosystem governance and the wellbeing of local communities adjacent to a protected area in Laos. By encouraging four of the involved field researchers to reflect upon and expose their practical approaches as scientific experts (in terms of methodologies, objectives, reliability of results and research influence), this article aims to improve our learning from research practice and to promote reflexivity in research. The reflexive study presented here emphasizes the social and political context or real world situation against which research outputs can and should be evaluated, and retrospectively sheds light on the barriers to reach research objectives. In essence, the article addresses the relation between science and policy, and underlines the political undercurrent of conservation and development research in facilitating institutional change. The article outlines the very role of researchers in developing conservation policies, and provides a foundation for institutions and individual researchers to promote critical and constructive self-reflections in scientific practices.

Transformando camponeses de subsistência em servos de ecossistemas: desigualdade e a produção de recursos naturais na República Democrática Popular do Laos

This paper examines the nexus of nature conservation, productivity and domination in inclusive conservation approaches. It argues that the turning of subsistence peasants into “stewards and custodians of biodiversity” (CBD) represents a soft form of domination according to the false alternatives of ecological instrumentality in that local development is subordinated to supposed “natural” constraints. The argument draws from critical theories of societal nature relations (Horkheimer & Adorno, 2002; Görg. 2003; Moore, 2015) as well as from extensive research on ecotourism as an instrument to reconcile conservation and development in the Lao People’s Democratic Republic. From this angle, conservation is seen as a way to produce “natural” resources building on, perpetuating and creating various social inequities, based on the fiction that “nature” is essentially non-human. This case is made with regard to National Protected Areas in Laos, which are designed explicitly to accommodate local people’s needs. Among other things, ecotourism is employed to create a source of income alternative to practices seen as “unsustainable”. Thereby, economic and also moral stakes in untouched resources are to be implanted. In such way, a compromise between (rather than a reconciliation of) conservation and development is imposed which is largely alien to the lived realities of local people, and only accounting partly for their needs and aspirations – an imposition which tends to produce its own countercurrents, again tying into productivity and inequality. This paper thus analyzes the workings of the nature/society dualism underlying ecological instrumentality as experienced in ecotourism as a tool for nature conservation in Laos.

A NEW SNAIL-EATING TURTLE OF THE GENUS Malayemys LINDHOLM, 1931 (GEOEMYDIDAE) FROM THAILAND AND LAOS

We describe a snail-eating turtle, Malayemys isan sp. nov., from the Mekong River Basin in northeastern Thailand (Nong Bua Lamphu, Nong Khai and Udon Thani provinces) and the adjacent Vientiane area in Laos. The new species is readily distinguishable from M. subtrijuga by its two (vs. six to nine) nasal stripes, and from both M. subtrijuga and M. macrocephala by its thin, often discontinuous, infraorbital stripe that never reaches the loreal seam. This geographically-restricted new species is sold in several food markets throughout the species‟ distribution and is in urgent need of conservation measures.