Sanitation Systems Research Articles

Application of machine learning in sanitation management prediction: Approaches for achieving sustainable development goals

Due to lack of understanding about the different conditions of sanitation systems and complexity, mostly in Asia and Africa, the occurrence of unsafely managed sanitation still exists, leading to severe environmental and health impacts. Because of the complexity of this problem, machine learning tools were applied to develop an effective model for health protection and safe sanitation management as a promising way to approach sustainable development goals. This study aimed to examine the incidences of ineffective sanitation management on the prevalence of diarrhea infections using machine learning tools. The prevailing conditions for safely sanitation management were identified, and the effective model to protect the impacts of ineffective sanitation management on the prevalence of diarrhea infections was proposed. Based on information collected from about 1000 households with relatively high diarrhea infections during the period of 2017–2021, factors relating to sanitation facilities for health protection and safe sanitation management were examined. Diarrhea infections and no diarrhea infection were recognized based on actual conditions of the surveyed households and incidences from ground-based observation. Classification tree model as J48 in WEKA was applied for analytic predictive tool using 70:30 ratio of training and validating dataset. The findings showed that the tree model obtained from the training data was with 73% accuracy prediction, while that from the validation data was with 70% accuracy. The correlation of personal hygiene (such as washing hand before meal and drinking water from natural water sources) and sanitation facilities (such as open defecation and distance from on-site sanitation facilities to open drains or storm sewer) was significant with inverse relationship for safely sanitation management and public health protection.

Advancing sanitary surveillance: Innovating a live-feed sewer monitoring framework for effective water level and chamber cover detections

Efficient sanitation system management relies on vigilant sewage surveillance to uphold environmental hygiene. The absence of robust monitoring infrastructure jeopardizes unimpeded conduit flow, leading to floods and contamination. The accumulation of harmful gases in sewer chambers, coupled with tampered lids, compounds sewer network challenges, resulting in structural damage, disruptions, and safety risks from accidents and gas inhalation. Notably, even vehicular transit is vulnerable, facing collisions due to inadequately secured manholes. The core objective of this research was to deconstruct and synthesize a prototype blueprint for a live-feed sewer monitoring framework (LSMF). This involves creating a data gathering nexus (DGN) and empirically assessing diverse wireless sensing implements (WSI) for precision. Simultaneously, a geographic information matrix (GIM) was developed with algorithms to detect sewer surges, blockages, and missing manhole covers. Three scrutinized sensors—the LiDar TF-Luna, laser TOF400 VL53L1X, and ultrasonic JSN-SR04T—were evaluated for their ability to measure water levels in sewer vaults. The results showed that the TF-Luna LiDar sensor performed favorably within the 1.0–5.0 m range, with a standard deviation of 0.44–1.15. The TOF400 laser sensor ranked second, with a more variable standard deviation of up to 104 as obstacle distance increased. In contrast, the JSN-SR04T ultrasonic sensor exhibited lower standard deviation but lacked consistency, maintaining readings of 0.22–0.23 m within the 2.0–5.0 m span. The insights from this study provide valuable guidance for sustainable solutions to sewer surveillance challenges. Moreover, employing a logarithmic function, TF-Luna Benewake exhibited reliability at approximately 84.5%, while TOF400 VL53L1X adopted an exponential equation, boasting reliability approaching approximately 89.6%. With this navigational tool, TF-Luna Benewake maintained accuracy within ±10 cm for distances ranging from 8 to 10 m, showcasing its exceptional performance.

Tracking enteric pathogen contamination from on-site sanitation facilities to groundwater in selected rural areas of Vhembe District Municipality, Limpopo Province, South Africa

Groundwater is valued as a source of potable water, although it is vulnerable to environmental pollution. The aim of this study was to track enteric pathogen contamination from on-site sanitation (OSS) facilities to 70 household boreholes used by four villages of the Vhembe District Municipality. Two objectives were pursued: to measure the lateral distance between the borehole and the sanitation facilities in household yards, and to track the enteric pathogens. The borehole abstraction point and OSS system distance were determined using a steel measuring tape. Real-time PCR was used to track Shigella flexneri, Salmonella typhimurium, Campylobacter jejuni, and enterotoxigenic Escherichia coli (ETEC) from Wastewater (WW) from domestic septic tank and sludge from pit latrines to boreholes. Escherichia coli was used as an indicator of faecal contamination. Results showed that 25% of households kept a distance of ≥50 m between the OSS facilities and the boreholes. In total, 87.5% of household boreholes in the rainy season and 72.5% in the dry season were contaminated with E. coli and pathogenic bacteria: Shigella flexneri, Salmonella typhimurium, and ETEC. The concentrations of the pathogens ranged from 2.03 to 2.12 LogEGC/100 mL. A very weak (r = −0.093) to moderate (r = −0.541) association was found between pathogens in groundwater and on-site sanitation systems (WW from septic tank and sludge from pit latrine). This suggests that the pathogens were not present in the sanitation compartment when they were found in the groundwater and vice versa. Moreover, a very weak (r = 0.007) to moderate (r = 0.525) association was found between the detected contaminants in groundwater and the lateral distance between the OSS facilities and the boreholes. The pathogens detected in all samples showed consistent concentrations, suggesting potential contamination from OSS systems' waste, possibly in groundwater, indicating potential contamination. The siting of OSS facilities at the yards in this study appeared to have a slight influence on the contaminants detected in groundwater. This study calls for an education program to be implemented by the Water and Sanitation Services Authorities to prevent contamination of groundwater and the risk of waterborne diseases.

ANALYSIS OF THE PHYSICAL-MECHANICAL PROPERTIES OF CONCRETE USING RECYCLED PVC AND AGGREGATES

Using recycled concrete has gained significant attention as a sustainable solution to reduce the environmental impact of construction waste. However, the mechanical properties of recycled concrete require thorough research to ensure its structural reliability. In this study, the objective was to determine the strength of concrete with PVC. A widely used material in most civil works is PVC, which is used in pipes and accessories for the project's hydro sanitary system. When the work is finished, a lot of PVC waste is discarded and is not recycled. In this research, the physical-mechanical properties of concrete are evaluated, using a dosage where the coarse aggregate is replaced by recycled and crushed PVC, in percentages ranging from 3% to 9%, mainly analyzing its behavior against compression and flexion at the age of 28 days, and obtaining its elastic modulus. The results obtained allow us to determine if the PVC added to the concrete mix gives us favorable results (greater compression and bending strength) or unfavorable results (higher costs, concrete slump, etc.)

Automated CAD-to-BIM generation of restroom sanitary plumbing system

Abstract Mechanical, electrical, and plumbing (MEP) system experts often have difficulties in converting their designs, in computer-aided design (CAD), into building information models (BIMs) owing to excessive repetitive work, lack of BIM skilled workers, frequent BIM recreations, etc. Therefore, this study aimed to formalize the CAD-to-BIM process of MEP systems, focusing on sanitary plumbing system, including soil, drain system, hot water supply, and cold water supply system. Each system’s process is composed of a combination of the following five common modules: pipeline processing module, pipe connection module, initial level setting module, addition riser nipple module, and clash resolution module. Consequently, a prototype developed based on the formalized process produced a sanitary plumbing BIM model that is identical to the CAD drawings and has no clashes. This study contributes to the MEP BIM theory by identifying considerations for CAD-to-BIM conversion of sanitary plumbing system and formalizing the process reflecting them.

Two-Dimensional MXene as a Promising Adsorbent for Trihalomethanes Removal: A Density-Functional Theory Study.

This groundbreaking research delves into the intricate molecular interactions between MXene and trihalomethanes (THs) through a comprehensive theoretical study employing density-functional theory (DFT). Trihalomethanes are common carcinogenic chlorination byproducts found in water sanitation systems. This study focuses on a pristine MXene [Mn+1·Xn] monolayer and its various terminal [Tx] functional groups [Mn+1·XnTx], strategically placed on the surface for enhanced performance. Our investigation involves a detailed analysis of the adsorption energies of THs on different MXene types, with the MXene-Cl layer emerging as the most compatible variant. This specific MXene-Cl layer exhibits remarkable properties, including a total dipole moment (TDM) of 12.443 Debye and a bandgap of 0.570 eV, achieved through meticulous geometry optimization and computational techniques. Notably, THs such as trichloromethane (CHCl3), bromide-chloromethane (CHBrCl2), and dibromochloromethane (CHBr2Cl) demonstrate the highest TDM values, indicating substantial changes in electronic and optical parameters, with TDM values of 16.363, 15.998, and 16.017 Debye, respectively. These findings highlight the potential of the MXene-Cl layer as an effective adsorbent and detector for CHF3, CHClF2, CHCl3, CHBrCl2, and CHBr2Cl. Additionally, we observe a proportional increase in the TDM and bandgap energy, indicative of conductivity, for various termination atom combinations, such as Mxene-O-OH, Mxene-O-F, Mxene-O-Cl, Mxene-OH-F, Mxene-F-Cl, and Mxene-OH-Cl, with bandgap energies measured at 0.734, 0.940, 1.120, 0.835, and 0.927 eV, respectively. Utilizing DFT, we elucidate the adsorption energies of THs on different MXene surfaces. Our results conclusively demonstrate the significant influence of the termination atom nature and quantity on MXene's primitive TDM value. This research contributes to our understanding of MXene-THs interactions, offering promising avenues for the development of efficient adsorbents and detectors for THs. Ultimately, these advancements hold the potential to revolutionize water sanitation practices and enhance environmental safety.

Design, implementation, and evaluation of a short rotation coppice system for wastewater treatment and resource recovery in India

Despite growing health concerns and increasing water scarcity, adequate wastewater treatment and reuse remains limited in India. Low-cost, decentralised, and nature-based on-site sanitation systems could play a key role in a circular water approach. This paper evaluates the performance of a Wastewater Fertigated Short Rotation Coppice (wfSRC) system based on willow, poplar, and bamboo species as a potential solution, offering low-cost, efficient water treatment, and high biomass production. Through a full-scale wfSRC pilot plant (250 m3·day−1 municipal wastewater on 6864 m2) established at Aligarh Muslim University, Uttar Pradesh, India, treatment capacities, biomass production rates, and contamination tolerance of different willow, poplar, and bamboo species were investigated. The chemical compositions of incoming wastewater, percolation water, soil, and biomass were monitored regularly. Despite the high load, all plant sections of the wfSRC system showed efficient removal of wastewater-originated pollutants. BOD5 and COD removal efficiencies were up to 99% and 95% respectively. Removal efficiencies for PO4-P reached 93% and for TN 91%. In general, total nitrogen and phosphate loads appear to be the limiting design parameters under the conditions at Aligarh to meet all discharge limits in India. Biomass production was projected to be >225 tDM·ha−1·yr−1 for bamboo, 65 tDM·ha−1·yr−1 for willow, and 206 tDM·ha−1·yr−1 for poplar. The pilot, conducted from March 2022 to June 2023, showcased how these densely planted agroforestry systems can effectively treat wastewater through natural processes such as oxidation, microbial degradation, and plant uptake. The findings demonstrate wfSRC's potential to serve as a nature-based, sustainable approach to wastewater treatment, particularly beneficial for suburban and rural areas in India and similar regions worldwide. This paper also provides recommendations for future implementation of wfSRC systems, emphasizing the need for careful planning regarding plant selection, system design, and operational strategies to maximize treatment efficiency and biomass production.

Photoinactivation of jack bean (Canavalia ensiformis) urease in fresh human urine using dichromatic low-pressure UV irradiation

In source-separating sanitation systems, inhibiting urease activity prevents enzymatic urea hydrolysis and volatilisation of ammonia when urine is concentrated by evaporation. This study tested UV-based photoinactivation as a novel alternative to existing methods of inactivating urease that require dosing urine with acid, base or oxidants. The enzymatic activity of jack bean (Canavalia ensiformis) urease in water, synthetic fresh urine and real fresh urine was investigated, with and without a 15 W low-pressure UV lamp that emitted 185 nm and 254 nm radiation. In UV-free controls, urea was hydrolysed at a rate of 3.2 × 10−3 mmol mgurease−1 min−1, 3.3 × 10−3 mmol mgurease−1 min−1 and 2.0 × 10−3 mmol mgurease−1 min−1 in water, synthetic urine and real urine, respectively. In the presence of UV, no urease activity was detected in any matrix. A UV irradiation time of 1.3 and 3.3 min was needed for inactivating urease in water and synthetic urine, respectively, whereas an irradiation time of 71 min was needed for inactivating urease in real urine. Overall, the electrical energy demand for photoinactivation of urease in real human urine was estimated to be 29.1 kWh m−3. Photolysis and photo-oxidation of amino acid residues at the active site of the enzyme were likely reasons for inactivation. Organic metabolites in real urine affected photoinactivation by (i) absorbing radiation between 190 nm and 400 nm, which reduced incident radiant flux; and (ii) scavenging hydroxyl radicals, which impeded oxidative damage to the enzyme. Overall, the findings demonstrate the feasibility of on-site treatment using a low-pressure UV lamp for inactivating urease in freshly excreted urine.

Greenhouse gas emissions from sanitation and wastewater management systems: a review

ABSTRACT There is growing awareness of the contribution of sanitation systems to greenhouse gas (GHG) emissions globally, and hence to climate change. However, there is a lack of comprehensive insight into emission sources disaggregated across the entire sanitation chain. This study presents a detailed review and analysis of emission sources from both sewer-based and non-sewered sanitation systems, with a focus on both fugitive emissions and those related to system operation. Our analysis highlights evidence gaps in several areas in the literature: quantifying emissions from non-sewered sanitation systems, with particular gaps related to technologies like biogas toilets and composting toilets; oversight of contextual factors such as environmental conditions and infrastructure operational status in GHG accounting; a dearth of holistic GHG emission studies across the entire sanitation chain comparable to those in the solid waste management sector; and inconsistencies in GHG measurement methods. By pinpointing these gaps, this review provides a robust reference for planning climate mitigation strategies for sanitation and wastewater management systems, emphasizes the urgent need for the incorporation of climate-smart solutions in the sector, e.g. in the design of new and retrofitted infrastructure, and aims to bridge the sustainable development goals related to sanitation and climate action.

Recent and future exposure of water, sanitation, and hygiene systems to climate-related hazards in Zambia

Abstract Climate change-driven water scarcity will lead to inequitable water, sanitation, and hygiene (WASH) access. However, current research in Zambia has ignored linking climate science dimensions to WASH access programs, thus limiting WASH-related climate action across the country. Here, we combine analyses of in situ datasets, modeling techniques, and systematic literature reviews to provide a solid climate science basis for WASH–climate action in Zambia. We find that in a warm near future climate, the stretch along the Copperbelt–Livingstone railroad from the north to the south of the country is expected to record an increase in heavy rainfall single-day events ranging between 50 and ≥150 mm. As such, bacterial diseases, such as cholera outbreaks, are expected to increase, especially in the Copperbelt, Central, Lusaka, Southern, and the Eastern Provinces. Models further predict a drier Zambia in the near and far future of up to 12 days year−1, suggesting a higher risk of increased aridity which will compound challenges to the provision of safe drinking water. The projected rapid population growth in these regions will also heighten the challenges of accessing safe drinking water. Strategic investments in enhancing WASH access in these areas should be considered a matter of urgency.

Rheology-based wall function approach for wall-bounded turbulent flows of Herschel–Bulkley fluids

Modeling fully developed turbulent flow for Herschel–Bulkley (HB) fluids in pipes is a long-standing challenge. Existing semi-empirical, theoretical, and numerical methods are either inconsistent with experimental data or are validated for low Reynolds numbers. This study focuses on validating a novel approach using rheology-based wall functions within Reynolds-averaged Navier–Stokes solvers. Simulations of wall shear stress and velocity profiles were conducted across a wide range of Reynolds numbers using a single-phase HB fluid, with measurements taken both upstream and downstream of a 90° pipe bend. Two turbulence closure models, the k–ε model and the Reynolds stress model, were employed with the wall function implemented as a specified shear boundary condition. Results demonstrate significant improvements over the Newtonian-based models, such as standard wall function by Launder–Spalding or with available semi-empirical models, achieving strong statistical correlations and minimal deviation (from the experimental findings) at high Reynolds numbers. The study also examines the utility of the wall viscosity Reynolds number and assesses the reliability of semi-empirical models for HB fluids. These findings offer valuable insights for enhancing modeling accuracy in complex fluid flow scenarios, with potential applications spanning industries like mining, chemical processing, petroleum transportation, and sanitation systems, providing practical alternatives to costly experimental procedures in pipe systems.

Design of an innovative sanitation system for bike-sharing service

The concept of a novel sanitization device specifically designed for helmets used in bike share services is presented in this scientific work. The system uses ozone, a powerful oxidizing agent, to completely remove dust and bacteria from the helmet surface. Throughout the development process, special attention has been paid to the dual initial goals of efficacy in removing dirt and batteries, as well as ease of use related to the device's safety. In fact, today's sharing services are rarely capable of providing adequate disinfection of the tools, which is especially troubling given the most recent years of pandemic caused by Covid-19. The invention of the ozone-based sanitization device addresses the growing concern about hygiene and safety in bike share services. Furthermore, due to its portability and ease of use, the device is a cost-effective and viable solution for use in a variety of settings. A significant contribution to the advancement of sanitization technology and public health is expected with this work.

Factors associated with the cholera outbreak in Al-Mahweet-Yemen: Analytic Study.

The emergence of cholera in 2016 in Yemen, worsened the morbidity and mortality of diarrheal diseases, particularly among children under five. Multiple outbreaks in Yemen are triggered by years of conflict and the collapse of basic infrastructure including water supply and sanitation systems. This study aims to assess factors associated with the cholera outbreak, in a cholera-prone region, in Al-Mahweet, Yemen. We conducted a multivariate analysis of the data collected through a household survey of 384 households in Al-Mahweet, Yemen. Families with children under five years, large households, and those living in Al Mahweet district were associated with a higher incidence of cholera. Water treatment by boiling, filtering, and chlorination as a protective practice against cholera showed a borderline significance, while other WASH practices including regular hand washing, open defection, safe water source, and improved sanitation facilities were statistically insignificant. Community awareness of cholera transmission and prevention measures showed no association with cholera incidence. Findings suggest that living conditions, including large households and lack of access to treated water, increase the risk of cholera. Interventions to increase access to treated water and improve the hygienic conditions of large households are of central importance. Affected communities must receive effective educational campaigns that are adjusted to change hygienic practices and improve knowledge of cholera transmission and protection measures.

The synergy between the government and the society for sustainable sanitation

Ensuring sufficient and enduring sanitation is crucial for the progress of the community, particularly in Ransiki, where obstacles exist in terms of public involvement and infrastructure. This study examines different strategies for enhancing the quality of housing and sanitation through partnerships between communities and local governments. The process comprises a comprehensive field survey and a thorough interview using a predetermined set of questions. The data analysis conducted using the Smart PLS approach revealed that the community-based sanitation system in Ransiki was unsuccessful in enhancing the quality of settlements. The primary issue lies in the insufficient sanitary infrastructure and the lack of public sanitation awareness. Establishing sanitation in the courtyard and surrounding regions is the only way to enhance the quality of human resources and settlements. Public engagement in sanitation remains limited, primarily due to insufficient education. While local governments prioritize infrastructure development, such as waste management and TPA, they must broaden their focus to include other areas, such as sanitation education. Moreover, the study revealed that the quality of settlements is directly influenced by factors such as the home environment, household hygiene, and human resources. Enhanced human resources positively impact the use of clean and safe water. This study asserts that improved collaboration between community and government endeavors is vital. Enhancing sanitation in a successful and enduring manner necessitates heightened public consciousness and education regarding sanitation, as well as government policies that are receptive and proactive. This study offers valuable perspectives on constructing efficient and enduring sanitation initiatives in Ransiki and other locations facing comparable circumstances.

Modeling of two-stage anaerobic onsite wastewater sanitation system to predict effluent soluble chemical oxygen demand through machine learning

The present research aims to predict effluent soluble chemical oxygen demand (SCOD) in anaerobic digestion (AD) process using machine-learning based approach. Anaerobic digestion is a highly sensitive process and depends upon several environmental and operational factors, such as temperature, flow, and load. Therefore, predicting output characteristics using modeling is important not only for process monitoring and control, but also to reduce the operating cost of the treatment plant. It is difficult to predict COD in a real time mode, so it is better to use Complex Mathematical Modeling (CMM) for simulating AD process and forecasting output parameters. Therefore, different Machine Learning algorithms, such as Linear Regression, Decision Tree, Random Forest and Artificial Neural Networks, have been used for predicting effluent SCOD using data acquired from in situ anaerobic wastewater treatment system. The result of the predicted data using different algorithms were compared with experimental data of anaerobic system. It was observed that the Artificial Neural Networks is the most effective simulation technique that correlated with the experimental data with the mean absolute percentage error of 10.63 and R2 score of 0.96. This research proposes an efficient and reliable integrated modeling method for early prediction of the water quality in wastewater treatment.

Pollution of Water’s direct effect in Iraq on the Public Health & Safety

The devastating effects of pollution of Water are significant, affecting human life, animal life and vegetation at the same time. Recently, Iraq has experienced the effects of pollution of Water, destroying an abundance of plants and many animals. Pollution of Water is one of the mostly deadly and severe problems facing humankind currently. This study analysed the effects of heavy metals Pb, like Cr, Zn and Fe in water for drinking. The findings revealed an upsurge in the number of cholesterol, urea, and white blood cells among people in Basra, Baghdad, and other urban areas. It was also found that these individuals were more likely to have fever, diarrhea, kidneys, and respiratory problems. Recent studies have revealed that pollution of Water in Iraq is caused by a variety of factors, i.e., solid pollutants, chemicals, and microorganisms. Unfortunately, due to the current state of war, there is not much concentration on water treatment plants (WTPs) resulting in a decrease in the quality of the supplied water. Due to the lack of wastewater treatment facilities in most Iraqi cities, sewage is simply discharged into the river. In addition, supply of water and sanitation systems in some major cities have been damaged and the two networks are jointly linked.

"AN ANALYSIS ON SOCIO-ECONOMIC STATUS OF SCHEDULED CASTES POPULATION IN TAJPUR VILLAGE, NORTH 24 PARGANAS IN WEST BENGAL"

An important part of the people of West Bengal is Scheduled Castes. A large number of Scheduled Caste people are living in North 24 Pargana district of the state. They are lagging far behind from the general class people in the socio-economic status. Employment determines the social and economic conditions of livelihood. The socio-economic development of any region is mainly based on the level of education and employment. The Present paper is concerned with socio-economic background of Scheduled Castes population in Tajpur Village in Habra - 2 block in North 24 Pargana distric in West Bengal. The basic information has been collected through the well prepared questionnaire and supplemented by secondary data. The total population of Tajpur Village is 4092. Among themselves 40% are Scheduled Castes people. The out come of the study reveals that the percentage of men and women belonging to Scheduled Castes percentage are 21.40% and 18.60% respectively.
 The education label of the area is not good. The literacy rate among women is far behind from Scheduled Castes men literacy rate. A large number of Scheduled Caste peoples of this area are unemployed. Most of are agricultural labourers. They live in non- concrete houses. Their sanitation system is very unhygienic. The study observed that the socio-economic conditions of Scheduled Castes people of this area are very low.

Emerging organic compounds as markers of the degradation of groundwater qualitative and quantitative equilibrium in a context of rapid urban expansion

With the neo-metamorphosis of the residential landscape worldwide and sluggish sanitation strategies in urban environments, rudimentary on-site sanitation systems remain commonly used, especially in developing countries, despite the risks of groundwater contamination. The effective management of such water resources relies on assessment of the sensitivity of anthropized aquifers to man-made impact, including groundwater behavioural alteration, in terms of both quality and quantity. Associated with tracking of changes in land use, this study proposes an approach involving emerging organic contaminants (EOCs) as indicators of the alteration of groundwater balance due the exposure of shallow aquifers to the risks of infiltration of untreated wastewater from soak pits. This methodology was applied to the shallow aquifer beneath the urban agglomeration of Grand-Sfax (Tunisia). Combined with an updated follow-up of groundwater piezometric fluctuations in relation with inputs from surface contamination sources, the spatialisation of contamination levels by EOCs provided a clear delineation of the most impacted aquifer zones. This approach revealed a significant link between the continuous rise in piezometric levels by contributions from untreated inputs and the accumulation of high levels of contamination in groundwater. The understanding of EOC underground pathways allowed the determination of the fates and processes responsible for the diffusion of contamination throughout the studied aquifer. The ability of groundwater to reflect population life style and the use patterns of such organic molecules was also assessed. Besides revealing the legacy of persistent contamination, this approach involving EOCs as tracers with different levels of persistence provided a spatial observation of the aquifer exposure to continuous contamination processes. This approach made it possible to develop a conceptual presentation of aquifer vulnerability to urban pressures and to predict the effects of subsequent expansion of unplanned urbanisation on groundwater quality.

Regional epidemiological features of infectious diseases with fecal-oral transmission in the socialist republic of Vietnam

Aim: To identify regional epidemiological features of infectious diseases spread by fecal-oral transmission and the factors influencing them in four regions of Vietnam.Materials and methods: Retrospective epidemiological analysis of data of 10 infectious diseases spread by fecal-oral transmission in Vietnam for the period 2017-2022. Maps of incidence by province was created using the QGIS 3.28 program. Correlation coefficients between the incidence of the studied diseases and socio-economic factors were established.Results: It was revealed that the incidence of the 10 studied diseases was 443.1±113.5 0 /0000 and tends to decrease. The highest incidence was recorded in Tay Nguyen. Cases of diarrheal syndrome (330.1±73.8 0 /0000) and enteroviral vesicular stomatitis (HMFD) (93.6±33.4 0 /0000) accounted for 95.65% of all registered cases. Diarrhea is distributed mainly among children under 4 years of age (1090.3±384.8 0 /0000) and 5-9 years old (60.9±18.5 0 /0000). Regional epidemiological features of diarrhea and HMFD are shown. The highest incidence of the HMFD was recorded among children under 4 years of age in Dong Thap (4635.8 0 /0000) and Ho Chi Minh City (4210.5 0 /0000), and the highest incidence of diarrheal syndrome was in Kon Tum (2621.2 0 /0000), Thai Binh (2556.6 0 /0000) and Dien Bien (1461.9 0 /0000). Relationships were established between the incidence of diarrhea and levels of access to safe water (rSpearman = – 0.393; p = 0.001), to the sanitation system (rSpearman = – 0.267; p = 0.035), average monthly income (rSpearman = – 0.424; p = 0.001), poverty levels (rSpearman = 0.403; p = 0.001).Conclusion: The high incidence of infectious diseases spread by fecal-oral transmission in Vietnam is due to the high incidence of diarrhea and HMFD. A high incidence of diarrhea is typical for provinces with low levels of access to safe water and sanitation systems, high levels of poverty and low average monthly income. Incidence of HMFD is high among children under 4 years old, especially in the southern provinces with high population density in the summer and autumn seasons.

Residential Environment of Public Universities for the Students

This study is about the residential environment of public universities in Bangladesh. The main aim of the study is to know the existing situation of residential environment whether its friendly or hostile for the students in the context of Bangladesh. Total 70 respondents who are students from 8 public universities of Bangladesh were taken by using purposive sampling method. Medical facility, meal services, Internet facility, room condition, educational environment at residence, political influence in seat distribution, ragging and guest room culture, recreational facilities, sanitation system, democratic environment at hall and provosts - students mutual coordination were taken into consideration to understand the situation of residence in universities. The research is designed by quantitative method. Here the facts are explained which lead to make the state friendly or hostile for the respondents regarding residential environment of public universities. This paper aims to represent the scenario as well as contribute to national sector by suggesting the policymakers, university authorities to be informed in the areas of concern from the perspective of students through the statistical exhibition on the condition of the dormitories of public universities in Bangladesh.