Environmental Health Insights最新文献

Background: School-based interventions are crucial for promoting healthy behaviors in children and preventing the spread of diseases. This study aimed to enhance hygiene knowledge and practices (K&P) among school children through a school-based intervention.

Objective: To improve personal and environmental hygiene K&P amongst primary and middle-grade students in urban squatter settlement schools in Karachi, Pakistan using school-based intervention.

Design: Quasi-experimental study conducted in three schools over 2 years.

Setting: Urban squatter settlement schools in Karachi, Pakistan, serving primary, and middle-grade students.

Participants: A total of 156 students participated in the study, with a majority of 55.77% being girls (n = 87). Pre- and post-intervention assessments were conducted to evaluate the impact of the intervention.

Intervention: Behavioral Change Communication (BCC) strategies aimed at improving school children's hygiene K&P.

Primary outcome measures: The primary outcome measures included changes in hygiene K&P pre- and post-intervention, specifically focusing on personal hygiene and environmental hygiene.

Results: Significant improvements observed post-intervention. Mean knowledge score differences were 20.33 (SD = 5.85) for personal hygiene and 10.08 (SD = 7.72) for environmental hygiene. Practice scores also increased, with mean differences of 2.52 (SD = 1.98) and 2.47 (SD = 2.08) for personal and environmental hygiene, respectively. Statistically significant improvements (P < .05) were noted across most of the hygiene domains.

Conclusions: The school-based intervention effectively improved personal and environmental hygiene K&P among primary and middle-grade children in urban squatter settlement schools. Key recommendations include integrating hygiene education into the curriculum, providing enabling environment to children and capacity building of school teachers to teach hygiene education.

This study evaluated the concentrations of polycyclic aromatic hydrocarbons (PAHs) and the carcinogenic risks of cattle and goat meats singed with either firewood, Liquefied Petroleum Gas (LPG) or tyres from five cities in Ghana. The meat samples, before and after singeing, as well as after scraping and washing, were collected from abattoirs and sent to Clinical Analysis Laboratory (Can-Lab) of Kwame Nkrumah University of Science and Technology (KNUST) for PAH analysis. Tyre-singed meats exhibit significantly higher PAHs concentrations (P = .01304) compared to those singed with firewood and LPG. Benzo[a]pyrene was the predominant PAH in tyre-singed cattle and goat meats, with concentrations of 23.1 mg/kg and 12.16 mg/kg, respectively. Washing singed meats reduced PAH levels, yet tyre-singed samples retained higher and dangerous concentrations than those singed with other fuels. Statistical analysis using ANOVA confirmed a significant effect of fuel type on PAH16 concentrations (P = .01304). The Tukey HSD test indicated a significant difference between LPG and tyre (P = .0105). Estimated daily intake (EDI) calculations highlighted potential health risks, particularly from tyre-singed meats, which exceeded regulatory limits set by health authorities. The findings emphasize the health hazards associated with consuming meats singed with tyres in Ghana and underscore the need for stringent regulatory measures and public awareness to mitigate PAH exposure.

Background: Vegetables play critical role in human nutrition and overall health. However, consumption of vegetables cultivated through wastewater-impacted river can be source of potentially toxic heavy metals, which can cause detrimental health effects when their concentration exceeds the recommended maximum levels. Despite growing body of evidence highlighting the dangers associated with heavy metal accumulation in vegetables, there remains critical gap in systematic assessments within Ethiopian context. Therefore, objective of this review is to reveal heavy metals concentrations in vegetables grown with wastewater-impacted river and assess associated public health risks.

Methodology: Research articles published in English were identified through systematic searching using electronic databases including PubMed, Google Scholar, WHO/FAO library, and searching from Google manually. The outcomes of interest were mean concentration of heavy metals in vegetables and associated health risks. Cross-sectional studies that met inclusion criteria were considered. Data were extracted by independent reviewers. Methodological quality of included studies was assessed using critical appraisal tools. Moreover, health risks of consumers were assessed through evaluating estimated daily intakes (EDI), Health Risk Index (HRI), and Hazard Index (HI).

Results: Nineteen articles were included in this systematic review. The findings revealed that the mean concentration of Pb, Cr, Cd, As, Hg, Cu, Ni, Zn, Mn, and Fe in tested vegetables ranged from: 0.28-7.68, 0.75-33.01, 0.14-3.93, 0.05-3.13, ND-4.25, 0.92-15.33, 2.13-13.1, 18.27-62.83, 8.83-331.8, and 177.8-1034.3 mg/kg (dry weight), respectively. The EDI of Pb, Cr, Cd, As, Hg, Cu, Ni, Zn, Mn, and Fe in vegetables was range from: 0.00104-0.0286, 0.00279-0.123, 0.00052-0.0146, 0.0000372-0.0116, 0.0124-0.0158, 0.00342-0.0439, 0.0079-0.0487, 0.068-0.23, 0.03-1.23, and 0.53-3.84 mg/kg/day, respectively. The HRI of toxic heavy metals for all vegetable types ranged as; Pb (0.26-7.15), Cr (0.00186-0.0820), Cd (0.52-14.6), As (0.12-38.7), and Hg (1.24-1.58). The HRI due to consumption of all vegetables was 35, 0.168, 46.6, 70, and 2.82 for Pb, Cr, Cd, As, and Hg, respectively indicating severe health impact except for Cr.

Conclusion: This review underscores health implications linked to consumption of vegetables cultivated using wastewater in Ethiopia. It revealed that the concentration of toxic heavy metals in vegetables grown with wastewater-affected water was higher than the maximum allowable safe limit set for edible vegetables by WHO that would be a public health risk.

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that are widely present in many industries. Monitoring and analyzing PFAS in Africa is challenging due to the limited availability of mass spectrometry (MS), which is an essential technique for detecting PFAS. This review assesses the scope and impact of the shortage of mass spectrometry instruments in Africa, emphasizing the resulting limitations in monitoring environmental and public health threats. The review analyzes the existing PFAS monitoring, the accessibility of MS instruments, and the technical capabilities within the continent. This study suggests that fewer African countries have sufficient MS instruments, resulting in significant underreport of environmental data and related public health issues. The review proposes financial support and programs to address these difficulties to provide necessary MS instruments. The review suggests that it is highly important to develop regional centers of excellence for PFAS monitoring using MS instruments and investing in training programs to address the gap in monitoring efforts. So, enhancing these are crucial for the successful management of the environment and safeguarding public health from the effects of PFAS contamination.

I read with great interest the recent study by Omohwovo on wastewater management challenges in Africa, which has strong parallels with the Philippines' own struggles in this area. Like Africa, our country is experiencing rapid population growth and urbanization without the necessary infrastructure to support effective wastewater treatment. The Philippines is also facing poor wastewater management that has led to severe heath concerns for humans, animals, and ecosystem. Since wastewater treatment and disposal facilities are rare, domestic wastewater is discharged without treatment. This has resulted in serious public health risks and environmental damage-problems that mirror those highlighted in Africa and emphasize the urgency of meeting the United Nations' Sustainable Development Goal 6 (SDG 6) for clean water and sanitation. This paper aims to provide guidelines for the Philippine government to consider localized solutions and policy integration to solve the issue of wastewater management in the Philippines.

[This corrects the article DOI: 10.1177/11786302241276667.].

Climate change represents an unprecedented global public health crisis with extensive and profound implications. The Lancet Commission identified it as the foremost health challenge of the 21st century. In 2015, air pollution alone caused approximately 9 million premature deaths worldwide. Climate change also exacerbates extreme weather events, displacement, mental health disorders, disease vectors, food insecurity, and malnutrition, particularly impacting vulnerable developing countries like Pakistan due to its agricultural reliance, diverse topography, and limited resources. This study assesses Pakistani medical students' perceptions of climate change's health impacts. Conducted in February 2024, a cross-sectional survey of 632 students using a standardized questionnaire was employed via online Google Forms. The questionnaire was validated and an Exploratory Factor Analysis identified seven subscales of environmental health consciousness. The mean participant age was 21.17 years, with a balanced gender distribution. Students showed high environmental health consciousness (Mean = 35.6, SD = 5.2), with 88% attributing climate change to human activities and 89.1% anticipating serious future health impacts. Significant concerns included air quality-related illness (91%), water-availability illness (86%), healthcare disruption (85%), cold-related illness (83%), and flooding-related displacement (87%). Psychological impacts were acknowledged by 68%. Household income, age, and gender were significant predictors. These results highlight the need for integrating climate change and health education into medical curricula to prepare future healthcare providers.

In Bangladesh, ensuring food safety from various hazardous contaminants, including heavy metals in different food items, has become a significant policy concern. This systematic review aimed to summarize the heavy metal contamination of locally produced fruits in Bangladesh and estimate the subsequent health risks of heavy metals upon consumption of reported fruits. A total of 1458 articles were retrieved from PubMed, Google Scholar, and manual Google searching, of which 10 were included in the current review. Health risks associated with the intake of these metals were evaluated in terms of estimated daily intake and carcinogenic and noncarcinogenic risks by target cancer risk, target hazard quotient, and hazard index. The heavy metal concentrations (mg/kg of fresh edible weight) in the fruits were As (ND-1.3), Cd (ND-0.64), Pb (ND-2.4), Cr (ND-2.5), Mn (ND-570), Ni (ND-9.0), Cu (0.5-32), Zn (0.24-134), and Hg (ND-0.006). The concentration of different heavy metals in various fruits particularly in the banana, mango, jackfruit, guava, litchi, blackberry, lemon, and tamarind fruit, were higher than the maximum acceptable concentration. All of the metals were consumed daily in amounts below the maximum tolerated daily intake for all fruits. The results showed that, except for As, all metals' target hazard quotients were below the safety level. The target hazard quotient for strawberry, guava, mango, pineapple, banana, and papaya surpassed the safety level. On the other hand, the target cancer risk levels of As, Cd, Cr, and Ni were higher than the acceptable levels for most fruit items, suggesting that long-term exposure to these toxic metals may raise the risk of developing various malignancies, including stomach and lung cancer. A more integrated strategy to reduce the contamination burden of heavy metals in fruits is important to conserve the health of the population.

Background: Vegetables and fruits are vital components of a healthy diet; however, consuming unclean, uncooked, or improperly prepared products can lead to parasitic infections. Contamination often occurs during both the pre-harvest and post-harvest phases. Thus, the aim of this study is to provide evidence-based scientific information about the level of parasitic contamination and risk factors in Ethiopian fruits and vegetables sold in local markets.

Methods: A random effects model was selected for analysis. Subgroup analyses and sensitivity analyses were performed to explore potential sources of heterogeneity using the I ² test. Publication bias was evaluated using the funnel plot, Begg's, and Egger's tests.

Results: A total of 3697 samples from 11 studies were included. The pooled prevalence of parasitic contamination was 43.99% (1642/3697) with (95% CI: 38.04-49.95). The highest prevalence was recorded from helminths (26.42%), followed by protozoan infections (17.57%). The most predominant parasites were Entamoeba spp. (6.40%), Ascaris spp. (6.28%), Giardia spp. (5.98%), and Strongylida (4.59%). Contamination rate of fruits alone was 7.02%, while that of vegetables was 36.97%. Additionally, cabbage (8.14%), lettuce (6.46%), tomato (6.12%), carrot (5.71%), and green pepper (5.12%) were the most contaminated vegetables. Factors such as the vegetable produce (aOR = 2.26; 95% CI: 0.86-3.65) and not washed prior to display (aOR = 3.36; 95% CI: 2.00-4.73) were factors associated significantly with parasitic contamination of fruits and vegetables.

Conclusion: The current finding revealed a significant level of parasitic contamination in fruits and vegetables. As a result, food and drug regulatory bodies, the agricultural sector, and public health organizations need to educate vendors, farmers, and consumers about safe methods for growing, transporting, handling, and eating these products, while also ensuring the establishment of safe market environments.

Registration: The review was registered in the International Prospective Register of Systematic Reviews (PROSPERO) with the registration number "CRD42024585961."

Occupational exposure to smoke and polycyclic aromatic hydrocarbons (PAHs) poses significant health risks, especially for commercial fish smokers who are regularly exposed to high levels of smoke and particulate matter. This study aimed to evaluate the exposure levels and assess the health risks associated with PAHs, phenols, phthalates, and substituted benzenes among 155 fish smokers in Ghana. A total of 155 urine samples from fish smokers across selected coastal regions in Ghana were collected and analyzed. The sample preparation was conducted using the Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERs) method, as standardized by the Association of Official Analytical Chemists (A.O.A.C.). Analysis was performed utilizing the Shimadzu GC-MS QP 2020. The type of firewood used by fish smokers significantly influenced the levels of PAHs detected in the urine samples. Hardwoods such as odum, acacia, and cocoa, with their dense structures and combustion characteristics, were found to produce higher levels of PAHs. In contrast, softer woods like sugar cane and palm kernel released lower PAH levels during combustion. The findings indicate that fish smokers utilizing various wood types and unfiltered ovens, specifically the "Chorkor Oven," are exposed to elevated levels of PAHs, phenols, phthalates, and substituted benzenes through inhalation during work hours. Cancer risk assessments revealed risk levels for PAHs ranging from 6.00E-04 to 4.14E-01, phenols from 0.00E+00 to 3.70E-01, substituted benzenes from 9.04E-08 to 1.99E-01, and phthalates from 3E-04 to 2.09E+04. These values exceed the limits by the U.S. Environmental Protection Agency (U.S.E.P.A.) of 10E-06. Furthermore, the estimated non-cancer hazard quotient values for hydrocarbons ranged from 8.42E+00 to 1.99E+01, all exceeding the threshold of 1, as outlined by both the U.S.E.P.A. and the World Health Organization (WHO), indicating substantial potential health risks for commercial fish smokers.