Publications by authors named "Tan Luong"

Anthrax, a widespread zoonosis in low and middle-income countries with low disease awareness and insufficient livestock vaccination coverage, has been known in Lao Cai Province in northern Vietnam for years before its apparent absence in 2009, which requires investigation as this infection is frequently reported from neighbouring provinces and countries. We aimed to describe the seasonal patterns of anthrax (1991-2008), compare livestock anthrax vaccine coverage to disease occurrence (1991- 2022), and delineate the high-risk areas to inform local disease surveillance in the province. We illustrated the seasonal pattern of anthrax and provided a comparison between livestock vaccine coverage and disease occurrence by purely spatial SaTScan (Poisson model, 25% population at risk) to detect spatial clusters of human and livestock anthrax using population derived from zonal statistics routines.

View Article and Find Full Text PDF

Aims: Anthrax is reported with frequency but poorly understood in Southeast Asian countries including Vietnam. In Vietnam, anthrax surveillance is national. However, case detection, prevention, and control are implemented locally at the provincial level.

View Article and Find Full Text PDF

Anthrax is reported globally with varying disease intensity and seasonality among countries. In Vietnam, anthrax epidemiology and ecology remain understudied. We used historical data of human and livestock anthrax from 2004 to 2021 in Lai Chau province, to identify spatial clusters of human and livestock anthrax, describe epidemiological characteristics, and compare livestock anthrax vaccine coverage to human and livestock disease incidence.

View Article and Find Full Text PDF

Water films formed by the adhesion and condensation of air moisture on minerals can trigger the formation of secondary minerals of great importance to nature and technology. Magnesium carbonate growth on Mg-bearing minerals is not only of great interest for CO capture under enhanced weathering scenarios but is also a prime system for advancing key ideas on mineral formation under nanoconfinement. To help advance ideas on water film-mediated CO capture, we tracked the growth of amorphous magnesium carbonate (AMC) on MgO nanocubes exposed to moist CO gas.

View Article and Find Full Text PDF

Bacillus anthracis, the bacterial cause of anthrax, is a zoonosis affecting livestock and wildlife often spilling over into humans. In Vietnam, anthrax has been nationally reportable since 2015 with cases occurring annually, mostly in the northern provinces. In April 2022, an outbreak was reported in Son La province following the butchering of a water buffalo, Bubalus bubalis.

View Article and Find Full Text PDF

Thin water films that form by the adhesion and condensation of air moisture on minerals can initiate phase transformation reactions with broad implications in nature and technology. We here show important effects of water film coverages on reaction rates and products during the transformation of periclase (MgO) nanocubes to brucite [Mg(OH)] nanosheets. Using vibrational spectroscopy, we found that the first minutes to hours of Mg(OH) growth followed first-order kinetics, with rates scaling with water loadings.

View Article and Find Full Text PDF

Water films captured in the interlayer region of birnessite (MnO) nanosheets can play important roles in biogeochemical cycling, catalysis, energy storage, and even atmospheric water harvesting. Understanding the temperature-dependent loadings and properties of these interlayer films is crucial to comprehend birnessite reactivity when exposed to moist air and temperature gradients. Using vibrational spectroscopy we show that birnessite intercalates one water (1W) monolayer at up to ∼40 °C, but that loadings decrease by half at up to 85 °C.

View Article and Find Full Text PDF

Hydrophilic nanosized minerals exposed to air moisture host thin water films that are key drivers of reactions of interest in nature and technology. Water films can trigger irreversible mineralogical transformations, and control chemical fluxes across networks of aggregated nanomaterials. Using X-ray diffraction, vibrational spectroscopy, electron microscopy, and (micro)gravimetry, we tracked water film-driven transformations of periclase (MgO) nanocubes to brucite (Mg(OH)) nanosheets.

View Article and Find Full Text PDF

Specific knowledge on the distribution of anthrax, a zoonosis caused by , in Southeast Asia, including Vietnam, remains limited. In this study, we describe disease incidence and spatial distribution of human and livestock anthrax using spatially smoothed cumulative incidence from 2004 to 2020 in Cao Bang province, Vietnam. We employed the zonal statistics routine a geographic information system (GIS) using QGIS, and spatial rate smoothing using spatial Bayes smoothing in GeoDa.

View Article and Find Full Text PDF

Iron oxyhydroxide nanoparticle reactivity has been widely investigated, yet little is still known on how particle aggregation controls the mobility and transport of environmental compounds. Here, we examine how aggregates of goethite (α-FeOOH) nanoparticle deposited on 100-300 μm quartz particles (GCS) alter the transport of two emerging contaminants and two naturally occurring inorganic ligands-silicates and phosphates. Bromide tracer experiments showed no water fractionation into mobile and immobile water zones in an individual goethite-coated sand (GCS) column, whereas around 10% of the total water was immobile in a GCS column.

View Article and Find Full Text PDF

Anthrax, caused by Bacillus anthracis, has a nearly global distribution but is understudied in Southeast Asia, including Vietnam. Here, we used historical data from 1999 to 2020 in Ha Giang, a province in northern Vietnam. The objectives were to describe the spatiotemporal patterns and epidemiology of human and livestock anthrax in the province and compare livestock vaccine coverage with human and livestock anthrax incidence.

View Article and Find Full Text PDF
Article Synopsis
  • Anthrax is a serious disease caused by Bacillus anthracis, mainly affecting wild herbivores but also humans, with the situation in Southeast Asia, particularly Vietnam, being underreported.
  • The study focused on Dien Bien province from 2010 to 2019, using historical data and statistical analysis to identify patterns and clusters of human and livestock anthrax cases, revealing significant areas of concern.
  • Results showed that increased livestock vaccination correlated with lower human anthrax cases, highlighting the need for improved livestock surveillance and further research to enhance disease monitoring in Vietnam and similar regions.
View Article and Find Full Text PDF

Anthrax is a priority zoonosis for control in Vietnam. The geographic distribution of anthrax remains to be defined, challenging our ability to target areas for control. We analyzed human anthrax cases in Vietnam to obtain anthrax incidence at the national and provincial level.

View Article and Find Full Text PDF

Plasmid-Mediated Colistin Resistance 1 (mcr-1) was first reported in 2015 and is a great concern to human health. In this study, we investigated the prevalence of mcr-1 and mcr-1-positive Escherichia coli (MCRPEC) and the association in infection status among various reservoirs connected to livestock. The study was conducted in 70 poultry and swine farms in a commune in Ha Nam province, northern Vietnam.

View Article and Find Full Text PDF

Background: This study aimed to evaluate the appropriateness of antibiotic dispensing of private pharmacies in Vietnam.

Methods: Standardised patient surveys were conducted in randomly selected community pharmacies across 40 districts in Vietnam. Four clinical scenarios were represented by patient actors: (a) an adult requesting treatment for a sibling with a viral upper respiratory tract infection (URTI), (b) a parent requesting treatment for a child with acute diarrhoea, (c) an adult making a direct antibiotic request, and (d) an adult presenting with an antibiotic prescription.

View Article and Find Full Text PDF

Birnessite is a layered MnO mineral capable of intercalating nanometric water films in its bulk. With its variable distributions of Mn oxidation states (Mn, Mn, and Mn), cationic vacancies, and interlayer cationic populations, birnessite plays key roles in catalysis, energy storage solutions, and environmental (geo)chemistry. We here report the molecular controls driving the nanoscale intercalation of water in potassium-exchanged birnessite nanoparticles.

View Article and Find Full Text PDF

In recent years, serosurveillance has gained momentum as a way of determining disease transmission and immunity in populations, particularly with respect to vaccine-preventable diseases. At the end of 2017, the Oxford University Clinical Research Unit and the National Institute of Hygiene and Epidemiology held a meeting in Vietnam with national policy makers, researchers, and international experts to discuss current seroepidemiologic projects in Vietnam and future needs and plans for nationwide serosurveillance. This report summarizes the meeting and the plans that were discussed to set up nationwide serosurveillance in Vietnam.

View Article and Find Full Text PDF

Background: It is uncertain whether vitamin D can reduce respiratory infection.

Objective: To determine whether vitamin D supplementation reduces influenza and other upper viral respiratory tract infections.

Methods: A total of 1300 healthy children and adolescents between the ages of 3 and 17 years were randomized to vitamin D (14 000 U weekly) or placebo for 8 months in Vietnam.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigated the prevalence of antibodies to highly pathogenic avian influenza A(H5N1) among poultry market workers (PMWs) in Vietnam, where the virus is common in poultry and has led to human infections.
  • Blood samples were collected from PMWs in Hanoi, Thaibinh, and Thanhhoa provinces, revealing an overall seroprevalence of 6.1%, with the highest rate (7.2%) in Hanoi—mostly among poultry slaughterers and sellers.
  • The findings underscore the need for ongoing surveillance of avian influenza at both human and animal levels in Vietnam to assess risks of avian-human transmission.
View Article and Find Full Text PDF

Background: Chikungunya virus (CHIKV) is an arbovirus with a high potential to spread globally. We investigated whether CHIKV is transmittable via corneal grafts.

Methods: Serum specimens from 69 potential corneal donors living in La Réunion during the 2005–2006 outbreak of CHIKV infection were screened for anti-CHIKV antibodies.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionrdptsinjt0j2jnsikq6djc197p2mbk0v): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once