Mortality benefits of reduction fine particulate matter in Vietnam, 2019.

Introduction and objectives: Studies assessing the health benefits of air pollution reduction in Vietnam are scarce. This study quantified the annual mortality burden due to PM2.5 pollution in Vietnam above the World Health Organization recommendation for community health (AQG: 5 µg/m3) and the proposed National Technical Regulation on Ambient Air Quality (proposed QCVN: 15 µg/m3). Methodology: This study applied a health impact assessment methodology with the hazard risk function for non-communicable diseases (NCDs) and lower respiratory infections (LRIs) in the Global Exposure Mortality Model (GEMM) to calculate attributable deaths, Years of Life lost, and Loss of Life expectancy at birth due to air pollution in the Vietnamese population above 25 years of age in 11 provinces. We obtained annual average PM2.5 concentrations for Vietnam in 2019 at a 3x3 km grid modeled using Mixed Linear regression and multi-data sources. Population and baseline mortality data were obtained from administrative data system in Vietnam. We reported the findings at both the provincial and smaller district levels. Results: Annual PM2.5 concentrations in all studied provinces exceeded both the AQG and the proposed QCVN. The maximum annual number of attributable deaths in the studied provinces if they had complied with WHO air quality guidelines was in Ha Noi City, with 5,090 (95%CI: 4,253-5,888) attributable deaths. At the district level, the highest annual rate of attributable deaths if the WHO recommendation for community health had been met was 104.6 (95%CI: 87.0-121.5) attributable deaths per 100,000 population in Ly Nhan (Ha Nam province). Conclusion: A much larger number of premature deaths in Vietnam could potentially be avoided by lowering the recommended air quality standard. These results highlight the need for effective clean air action plans by local authorities to reduce air pollution and improve community health.

Bringing Sectors Together in Da Nang, Vietnam: Participatory Systems Mapping.

The USAID-funded Building Healthy Cities (BHC) work in Da Nang, Vietnam, engaged 108 multi-sector stakeholders to gather qualitative data across two workshops and three citizen town halls from 2019 to 2021. These data were synthesized with the results from BHC's seven other activities in Da Nang to build systems maps. Contextual findings showed that multi-sector, multi-level participation and collaboration have been the key to moving the city toward their smart and livable city goals. Currently, citizen, nongovernmental organization, and private sector collaboration are low for many government sectors, which results in policy and programs that are mismatched to actual needs and therefore have less powerful impacts. When these policies and programs are implemented, they struggle to demonstrate strong benefits to these stakeholder groups, further decreasing participation. This is central to the systems map that BHC developed, and is expanded upon through additional patterns that fall within four main areas: management quality; vision and leadership; workforce capacity; and community engagement. Stakeholders found four key leverage points within this context that, if included in every action, could help overcome barriers. These leverage opportunities are: (1) investing at all levels; (2) improving function and innovation of information technology; (3) increasing participation and feedback; and (4) creating more responsive policy. As BHC concludes activities in Da Nang, local university students will be trained on systems mapping techniques to embed systems thinking skills into the next generation of workforce, and a set of recommendations will be developed to share with the government to act on these findings.

An ancient truncated duplication of the anti-Müllerian hormone receptor type 2 gene is a potential conserved master sex determinant in the Pangasiidae catfish family.

The evolution of sex determination (SD) in teleosts is amazingly dynamic, as reflected by the variety of different master sex-determining genes identified. Pangasiids are economically important catfishes in South Asian countries, but little is known about their SD system. Here, we generated novel genomic resources for 12 Pangasiids and characterized their SD system. Based on a Pangasianodon hypophthalmus chromosome-scale genome assembly, we identified an anti-Müllerian hormone receptor type Ⅱ gene (amhr2) duplication, which was further characterized as being sex-linked in males and expressed only in testes. These results point to a Y chromosome male-specific duplication (amhr2by) of the autosomal amhr2a. Sequence annotation revealed that the P. hypophthalmus Amhr2by is truncated in its N-terminal domain, lacking the cysteine-rich extracellular part of the receptor that is crucial for ligand binding, suggesting a potential route for its neofunctionalization. Reference-guided assembly of 11 additional Pangasiids, along with sex-linkage studies, revealed that this truncated amhr2by duplication is a male-specific conserved gene in Pangasiids. Reconstructions of the amhr2 phylogeny suggested that amhr2by arose from an ancient duplication/insertion event at the root of the Siluroidei radiation that is dated to ~100 million years ago. Together these results bring multiple lines of evidence supporting that amhr2by is an ancient and conserved master sex-determining gene in Pangasiids, a finding that highlights the recurrent use of the transforming growth factor ß pathway, which is often used for the recruitment of teleost master SD genes, and provides another empirical case towards firther understanding of dynamics of SD systems.

The Cotton Dust-Related Allergic Asthma: Prevalence and Associated Factors among Textile Workers in Nam Dinh Province, Vietnam.

OBJECTIVE: To determine the prevalence of cotton dust-related allergic asthma and associated factors among textile workers in Nam Dinh province, Vietnam. METHODS: A cross-sectional study was performed with 1082 workers in two textile garment companies using the asthma diagnostic criteria of the GINA (Global Initiative for Asthma) 2016 guidelines. RESULTS: Among study participants, 11.9% had suspected asthma symptoms, 7.4% were diagnosed with asthma, and 4.3% (3.6% in men and 4.5% in women) were diagnosed with cotton dust-related allergic asthma. Overweight, seniority more than 10 years, history of asthma, allergic rhinitis, family history of allergy, and exposure to cotton dust from more than one hour per day in the working environment were found to be important predictors of cotton dust-related allergic asthma among textile workers. CONCLUSIONS: Textile workers in two companies in Nam Dinh, Vietnam had a high prevalence of dust-related allergic asthma compared to estimates from the general population. There is a need to design appropriate measures of prevention, screening, and care for dust-related asthma in the textile industry. Further evaluation with better exposure assessment is necessary.