Sanitech, a leader in integrated hygiene and sanitation solutions, recently celebrated its 50th anniversary. Reflecting on the company’s journey from a small plumbing business to a comprehensive sanitation provider, Sanitech’s Managing Director, Robert Erasmus, shares insights into the company’s history, recent initiatives, and future aspirations.
The Sanitech name was registered in 1974 by Grant Murray in KwaZulu-Natal. Initially, it was a small plumbing business, but Murray quickly identified a market for portable sanitation services. Over the years, Sanitech expanded, albeit on a limited scale, by partnering with various agents. The significant transformation began in the 1990s and early 2000s when private equity ownership enabled national growth. In 2007, the business continued to expand following the acquisition of Sanitech, which marked the beginning of global support for WACO International.
Erasmus joined Sanitech in 2008, marking a pivotal moment. “My role was to transform Sanitech into a corporate entity aligned with WACO International’s standards in health, safety, policies, and procedures,” Erasmus explains. Under his leadership, Sanitech expanded from eight locations to 24 and diversified its services beyond portable toilets to include integrated hygiene services, water and waste treatment, and pest control. Today, Sanitech employs over 3,000 people, a substantial increase from 350 in 2008.
Instead of a traditional celebration event for its 50th anniversary, Sanitech chose to invest in Corporate Social Investment (CSI) projects. Sanitech sponsored 50 Khusela sanitation units across various regions in South Africa. These units were installed in disadvantaged schools in areas such as Witbank, Johannesburg, Durban, Port Elizabeth, and Cape Town, providing proper sanitation facilities and meals for the day. “It was a school-focused initiative, ensuring that learners have access to clean and safe sanitation, which is crucial for their health and education.”
Looking ahead, Erasmus envisions Sanitech continuing its trajectory of growth and innovation. “We aim to expand our product and service offerings in the hygiene and sanitation sector, especially as we face new challenges like the potential water crisis. Sub-Saharan Africa presents significant opportunities, and we’ve already established a presence in Mozambique,” he notes. Sanitech plans to enhance its contributions to clients’ Environmental, Social, and Governance (ESG) requirements by expanding its hygiene, cleaning, and pest control services.
Reflecting on the impact of their CSI projects, Erasmus shares a poignant experience: “Visiting the school in Palm Ridge where we installed new sanitation units was eye-opening. The conditions these young learners face are challenging, yet their discipline and resilience are incredible. It was a humbling reminder of the importance of our work.”
In South Africa, and across many developing nations, the discourse leading up to elections often centre on fundamental issues that directly impact the daily lives of citizens, such as the cost of living and access to clean water and sanitation. As the world witnesses a significant portion of its population gearing up to vote in 2024, it becomes evident that the voting criteria in developing countries vastly differ from those in developed ones.
While developed nations may debate topics like climate change and immigration, citizens in developing countries like South Africa are primarily concerned with securing basic necessities for survival and dignity. The disparity in voting patterns reflects the stark contrast in the challenges faced by people living in different parts of the world.
Elevating the discussion on South Africa’s paradox
South Africa, despite being regarded relatively highly in terms of election fairness, grapples with persistent challenges in providing access to clean water and adequate sanitation facilities. Our democratic process works, but it needs to be leveraged correctly for the benefit of our people. Many communities across the country continue to suffer due to the absence of proper sanitation infrastructure, perpetuating cycles of poverty and disease. The lack of clean water exacerbates these challenges, posing significant obstacles to health, dignity, and economic progress.
The interconnectedness of health, dignity, and economic progress
It is worth noting that the voting populace in South Africa has shifted its focus from ideological differences to practical concerns about the delivery of basic human rights. This shift underscores the importance of addressing the immediate needs of citizens before delving into broader policy discussions. Without access to clean water and sanitation, individuals and communities struggle to break free from the cycle of poverty and disease, hindering their ability to participate fully in economic and social life.
The impact of inadequate sanitation and clean water access extends beyond health and dignity – it also affects economic progress. Families burdened with preventable illnesses spend precious resources on healthcare instead of investing in education and livelihoods. Children often sacrifice their education to care for sick family members, further perpetuating the cycle of poverty. To address these challenges, practical solutions must be prioritised that ensure equitable access to clean water and sanitation for all citizens to break the cycle of poverty and disease and pave the way for economic growth.
Solving South Africa’s challenges starts with sanitation
These solutions include investing in infrastructure that can provide clean water and adequate sanitation facilities to all communities, especially those in rural and underserved areas, while at the same time investing in the repair and maintenance of existing infrastructure.
Implementing technologies such as water purification systems and innovative sanitation solutions tailored to local needs can help bridge the gap in access. Additionally, community engagement and education programs are essential to promote hygiene practices and ensure the long-term sustainability of water and sanitation initiatives. By prioritising these solutions, South Africa can make significant strides towards ensuring equitable access to clean water and sanitation for all its citizens.
Advocating for real change beyond election promises
Citizens have a central role to play in advocating for real commitment from political candidates. By elevating the discussion around sanitation and clean water access, voters are better informed to hold leaders accountable for delivering on their promises. Political parties must recognise the importance of addressing basic needs and commit to implementing sustainable solutions that uplift communities and promote dignity. For political parties this will be one of the most effective ways to win and retain the vote.
As we get closer to election date, it is essential to correctly prioritise the basic needs of citizens, including access to clean water and sanitation. This is not a critique of the government but a call to action – a recognition of the fundamental rights that must be upheld for all individuals to thrive. By addressing sanitation challenges, South Africa can pave the way for a future where every citizen has the opportunity to live a healthy, dignified life and contribute to the nation’s prosperity.
World Water Day 2024 resonates deeply in South Africa, where access to clean water remains a significant struggle for many. Recent protests sparked by water scarcity highlight the urgency of this issue, reminding us that water is not just a resource, but a fundamental human right.
This year’s theme, “Leveraging Water for Peace,” calls for unity and recognition of water’s universal significance. As we face the reality of inequality, it is important for us to renew our commitment to equitable water access for all, by fostering dialogue and taking action that is deeply rooted in empathy and ubuntu. Every drop should bring not only sustenance, but also the promise of peace and prosperity.
Connecting local struggles to global issues
South Africa’s water challenges mirror broader global concerns. Ranked a worrying fifth in global water risk, we share these strained resources with our neighbours. This interconnectedness cannot be ignored, and neglecting this truth is likely to fuel regional tensions. Instead, by highlighting our shared challenge, we can strengthen our position and emphasise the need for collaborative solutions. The depth of South Africa’s water scarcity isn’t just a domestic issue – it’s a regional one. Our ranking among the world’s worst puts us alongside stressed neighbours, suggesting the potential for cross-border conflict over shared resources.
Internally, competition between formal and informal users already creates friction, amplified by seasonal rainfall and inadequate infrastructure. To make matters worse, poor sanitation further contaminates water sources, escalating the crisis. The Institute for Security Studies’ Public Violence and Protest Monitor shows that in South Africa, community frustrations with water and sanitation delivery failures resulted in 585 cases of public protest between January 2013 and April 2021, of which incidents, 65% escalated into violent protests.
Aligning with the water rights framework
Although South Africa boasts a progressive water rights framework, our efforts must align with this framework, ensuring that the fight for water equity remains central to our pursuit of peace. Empowering communities with access to clean drinking water and sanitation and upholding water rights are essential steps toward conflict prevention.
Raising awareness is essential, but tangible action holds the key to progress. Businesses can play an important role in acknowledging South Africa’s water scarcity and investing in corporate social responsibility (CSR) projects that focus on addressing sanitation and water quality in the communities in which they operate. From an individual perspective, it is important that each citizen does their part to conserve water, while supporting organisations that work on improving water access, and raising awareness of related issues within their communities. At a government level, it is critical to prioritise infrastructure maintenance, address sewage contamination, and collaborate with regional partners and industries on sustainable water management strategies, to prevent civil unrest by addressing water equity issues.
Tapping into Ubuntu and empathy
Ubuntu, the South African philosophy of shared humanity, encourages us to understand and share the experiences of others. Cultivating empathy across communities, businesses, and government fosters inclusive dialogue and collaborative solutions. With the principles of ubuntu in mind, it is critical to address sewage contamination to preserve our scarce water resources. It is essential for municipalities and provincial governments to invest in infrastructure upgrades to reduce water loss and improve delivery. Businesses operating within the sanitation and water treatment sectors have the potential to empower communities by providing filtration and treatment solutions for local water sources. Moreover, the broader private sector can contribute to corporate social responsibility (CSR) initiatives aimed at enhancing sanitation and water quality in vulnerable communities.
Amplifying voices through collaborative communication
Empowering community voices is vitally important. This can be achieved through increased awareness on water scarcity and its impact, as well as by supporting local initiatives that improve water access and quality. Based on the principles of ubuntu, we must advocate for the facilitation of open communication between communities, businesses, and government. Water advocacy groups such as South African Water Caucus (SAWC), and water project NGOs such as the Mvula Trust must continue to advocate for increased funding for water and sanitation projects, by holding the government accountable for meeting water rights and supporting regional cooperation on water management.
Uniting for peace and prosperity
In this way, individuals, organisations, and governments can turn the promise of World Water Day into tangible progress by working together. In prioritising equitable water access, addressing underlying challenges, and fostering collaboration, we can build a future where every drop flows towards peace, not conflict. Remember, water scarcity and strife does not have to be our inevitable future. Through collective action and commitment, we can ensure that this precious resource serves as a bridge to peace and prosperity for all.
The continued use of pit latrines presents grave risks in South Africa, particularly within school environments where the safety and well-being of children are compromised. Recent government statistics from March 2023 reveal a staggering reality: out of 23 000 public schools, over 3300 still rely on pit latrines, necessitating urgent action.
Private sector involvement through Corporate Social Investment (CSI) emerges as a critical player in tackling this pressing issue. In 2022, a substantial R10.9 billion was designated for CSI, with half of the funds directed to the education sector. By reallocating a portion of these resources towards sanitation initiatives, companies could act as a powerful force for meaningful change, especially if invested in innovative solutions like the Khusela dry sanitation unit. This advanced solution not only holds the potential to resolve the sanitation crisis in schools but also provides an avenue for businesses to elevate their Environmental, Social, and Governance (ESG) ratings simultaneously.
CSI can bypass burdensome bureaucracy
With approximately 14% of public schools still relying on hazardous facilities, urgent action is essential; but eradicating pit latrines from South African schools is no small feat. While close collaboration between the private and public sector will be required, government has been slow to address this health and safety crisis as promised, and their burdensome procurement and tender processes have only served to hinder progress, making it evident that relief will have to be sought elsewhere. This is where a beacon of hope emerges through the coordination of CSI and ESG initiatives in the private sector. One of the key advantages of leveraging CSI and ESG initiatives is their potential for rapid, impactful change. The private sector, with its focused CSI efforts, can target key areas for high-impact intervention. Schools, being the cornerstone of a child’s daily life, stand to benefit the most. Imagine the profound difference proper sanitation facilities could make in the lives of students who spend most of their day within these school premises. A rapid transformation in these facilities, facilitated by private sector involvement, can significantly improve the learning environment and overall, well-being of these young minds.
A swift and strategic approach to school sanitation
Measuring the success of CSI initiatives is crucial, and this is where a collaborative approach truly shines. Conducting nationwide surveys and prioritising schools most in need will allow for a strategic and targeted allocation of resources. Instead of waiting for bureaucratic processes to run their course, CSI initiatives can swiftly address the pressing issues of inadequate sanitation facilities. The results will be tangible, the impact immediate, and the benefits will reach those in need, without delay or diversion. Furthermore, ongoing collaboration with waste management providers will oversee these sanitation solutions to ensure initiatives remain purpose-fit, providing not just a one-time fix but a sustained relationship for ongoing positive change.
A safe, cost-effective sanitation solution
At the forefront of revolutionising sanitation in South African schools stands the Khusela dry sanitation unit. Unlike traditional pit latrines, the Khusela unit offers a safer and more hygienic alternative, eliminating the inherent health risks associated with dangerous, unsanitary facilities. Its design focuses on promoting a healthier environment by efficiently managing waste, mitigating contamination, and significantly reducing unpleasant odours. The introduction of Khusela units in schools will not only address a critical health concern but also empower students, especially girls, by providing a discreet and dignified space for personal hygiene, ensuring that the barriers to regular school attendance are diminished. Additionally, the ESG advantages of sanitation upgrade projects are significant, spanning environmental preservation, enhanced social well-being, and improved governance, aligning clearly with fundamental ESG principles that emphasise dedication to a sustainable future.
CSI and ESG: win-win for public schools and the private sector
In short, effective CSI initiatives focused on sanitation offer a dual advantage: they align with corporate CSI objectives while directly addressing essential ESG aspects like environmental and social responsibility. This unique synergy creates a win-win scenario, where the private sector can fulfil its societal and environmental obligations and ultimately contribute to a sustainable and equitable future. The call to action is clear – businesses must recognise the power they possess to expedite change and must engage with organisations in the waste management, hygiene, and sanitation space for impactful partnerships. Together, we can replace pit latrines in South African schools with safer, more hygienic alternatives and create healthier environments that are conducive for the growth and development of our youth.
South Africa’s sewage crisis has dire consequences for public health, waterways, and ecosystems. Outdated and poorly maintained wastewater infrastructure due to insufficient investment is one factor that results in poor waste management. The strain of rapid urbanisation with inadequate sanitation facilities in informal settlements and the exacerbating impact of climate change through increased rainfall events are also factors that contribute to poor waste management. Despite these challenges, there is room for optimism. Collaborative efforts between government and the private sector have the potential to address this dire situation, bringing forward practical, affordable solutions that hold the promise of a cleaner, healthier future for all communities.
A public health crisis: deadly waterborne diseases
South Africa’s persistent sewage crisis recently sparked a new cholera outbreak, primarily stemming from dysfunctional municipal sewage systems. Over 90% of the nation’s 824 treatment plants discharge untreated or partially treated sewage into our limited water resources. As of June 2023, the Department of Health had documented 1,045 suspected cholera cases across five provinces, with 197 cases confirmed by laboratory testing, directly linked to compromised water supply.
This crisis disproportionately impacts both urban and rural regions, where access to clean water and sanitation remains a pressing concern. Impoverished communities often rely on highly polluted water sources contaminated by sewage from overwhelmed treatment plants, further straining water purification efforts to meet safety standards. Recognising the intrinsic connection between drinking water quality and wastewater treatment is crucial, necessitating immediate attention and resolution.
However, a significant challenge faced by South African communities is the prohibitive cost of implementing waterborne sanitation solutions everywhere. With over four million latrines and roughly 50 million people lacking adequate sanitation, conventional waterborne systems are neither viable nor cost-effective comprehensive solutions.
South Africa’s water quality reports: red flags aplenty
The Blue Drop Report 2023, released in June 2023, paints a concerning picture of South Africa’s drinking water quality. While major cities maintain safe water, outlying areas face contamination and infrastructure challenges. Key statistics from the report reveal that the average Technical Site Assessment (TSA) score for water treatment systems is 69%, indicating partial functionality. About 15% of water supply systems are in poor or critical condition, with only 33% having Water Safety Plans, posing significant risks to water quality. Additionally, 50% of municipalities struggle with bad or poor microbiological water quality.
Wastewater and water wasting: two major risks
The 2023 Green Drop Report assesses wastewater treatment systems, showing a decline with an average score of 50%. Regional disparities persist, with Eastern Cape and Limpopo scoring lowest, while the Western Cape and Gauteng lead. The No Drop Report examines water losses, revealing a decline in overall performance in 2023, with an average score of 65%, which means that one-third of supplied water is wasted before it reaches consumers.
These reports collectively underline the urgent need to enhance drinking water quality in South Africa. Municipalities must focus on prioritising infrastructure maintenance and upgrades, implement risk-based water quality management, and strengthen compliance with standards. The Department of Water and Sanitation must offer more support to municipalities. Failing wastewater treatment facilities exacerbate drinking water purification, risking tap water safety and triggering further potential health and environmental crises. Therefore, they must take steps to safeguard water quality and address sewage infrastructure issues.
Rapid crisis intervention required
South Africa’s sewage crisis is a dire challenge that requires immediate action and innovative solutions. In recognising the inextricable link between sewage waste management and water quality, we must also acknowledge that this crisis cannot only be addressed by government without support from private sector industry leaders and experts. Portable water treatment package plants are available, along with small filtration and sterilisation systems for communities. Wastewater packaged treatment plants and solutions can help both alleviate immediate concerns and contribute to long-term sewage management strategies. Further neglecting the sewage problem and the critical maintenance of existing infrastructure will only deepen our water crisis. For this reason, the government needs to prioritise investment in sewage treatment infrastructure and implement practical, affordable solutions across all communities.
Mitigating South Africa’s sewage crisis
If municipal water supplies deteriorate further, sanitation specialists will be required to step in with a range of interventions. These extend from portable water treatment packaged plants to improve water quality at its source, to small-scale filtration and sterilisation systems designed for household use to ensure safe drinking water directly from the tap. From a contamination perspective, it is critical to reduce sewage entry into water courses, particularly in rural areas and informal settlements. This can be achieved through enhanced sanitation solutions, such as dry sanitation toilets, which are waste-contained alternatives to pit latrines.
From immediate relief to sustainable futures
Interventions will need to consider both immediate and long-term strategies. For short-term relief, containerised package plants can bolster sewage treatment facilities without the need for extensive infrastructure development, alleviating the strain on existing systems. Simultaneously, sanitation providers in the private sector can aid municipalities in implementing long-term solutions, including megalitre plans that feature efficiently packaged treatment plants. By adopting these smaller, cost-effective alternatives, it is possible to achieve the same capacity traditionally associated with larger concrete plants, in a fraction of the time to avert total system collapse and the impending health and economic catastrophes that would surely follow.
In South Africa, the use of pit latrines remains a prevalent human rights issue, infringing on every person’s right to life, dignity, and health, as well as their right to access water and adequate basic sanitation. Despite their unavoidable application in certain contexts, pit latrines pose numerous risks to life, health, and safety, particularly in schools and areas lacking proper sanitation infrastructure such as informal settlements, prompting efforts to eliminate their presence in the country.
As far back as 2019, the Department of Water and Sanitation (DWS) launched a campaign called Khusela, which means “to eradicate” in isiZulu, to abolish pit latrines by 2030. Given the extensive challenges related to sanitation infrastructure, eradicating pit latrines is going to take time, particularly in rural areas. Nonetheless, this human rights issue must be squarely addressed and that functional, sustainable alternatives to open pit latrines are given the proper prioritisation.
Pit latrines: the shocking numbers
From a sanitation perspective, there are 380 schools in South Africa with no running water. 3392 schools still use pit latrines, which affects 34 489 teachers and 1 042 698 learners. While it is difficult to ascertain exact population figures, it is estimated that there are still four million pit latrines in use by communities throughout the country, of which only two million are Ventilated Improved Pit (VIP) latrines, while the remainder are ordinary pits with, or without covers. VIP latrines are a type of pit latrine that has a ventilation pipe that allows air to circulate through the pit, which helps to reduce odours and the breeding of flies. These latrines are also typically constructed with a more substantial exterior structure than ordinary pit latrines.
Endangering communities
The use of pit latrines can be perilous, posing a safety risk, particularly for young children, females, and vulnerable individuals. Without proper maintenance or safety precautions, accidents such as falls, injuries, and even drownings occur. Pit latrines contribute to the spread of disease, posing a major health hazard to users and nearby residents, as inadequate waste management and poor sanitation practices contaminate the groundwater and soil, as well as nearby water sources which lead to the transmission of waterborne diseases like cholera, diarrhoea, and dysentery. Pit latrines often lack essential sanitation facilities, such as handwashing stations or proper waste disposal systems, which results in unhygienic environments, poor personal hygiene practices, and an elevated risk of infections and diseases.
For affected communities, the lack of access to clean water and proper sanitation has a significant impact on health and well-being. The lack of access to safe and hygienic sanitation facilities can lead to health problems, which can make it difficult for people to work and earn a living. The correlation between adequate sanitation and poverty is a complex issue, with several contributing factors. As such, it is important to address these factors to improve sanitation and ultimately reduce poverty.
Challenging to service
Pit latrines are used primarily in areas that do not have access to water. These gradually fill up over time, primarily with solid waste as most liquid waste evaporates or is absorbed into the soil. Originally estimated to last seven to ten years, these latrines often require maintenance in just two to three years due to the significant amount of additional waste they receive. Decisions must then be made to either close the latrine and dig a new hole or seek servicing, a challenging task that involves treating the solid waste to create a more liquid environment before using a honey sucker or vacuum tanker to extract and dispose of the waste in a treatment plant. The remote locations of many facilities add to the complexity of the process.
Seeking practical solutions and facing reality
This highlights the urgent need for practical solutions when addressing the challenges posed by pit latrines. To illustrate the practicalities, consider the sheer number of pit latrines – four million, with two million being VIPs and two million standards. Replacing all of these with waterborne sanitation is simply unfeasible in the short term, as this would require an additional one billion litres of water daily for flushing alone. This is currently an insurmountable obstacle in terms of water supply and treatment, considering the condition of existing waste treatment plants. The South African private sector has sought to find the most practical and effective way to address the critical issues of safety, environmental impact, and serviceability of these facilities. To make a tangible difference, it is necessary first to acknowledge that an immediate conversion to waterborne solutions is not practical, in the short and medium term.
Attainable, cost-effective alternatives
A safer alternative to pit latrines has been developed and tested extensively and is ready for implementation in communities. It is a cost-effective, dry sanitation unit that addresses health and safety shortfalls, installation difficulties and servicing problems with pit latrines while ensuring that environmental and underground water contamination cannot occur. The main structure consists of concrete and the door is made of injection moulding plastic, with a ventilation pipe to limit odours. The waste containment unit has a 1500-litre bladder with a 3–5-year guaranteed life cycle, which can be removed without disabling the unit. The units are mobile, and no pit must be dug, which reduces installation costs and limits the abandonment of land. The unit itself is shaped in an ellipse to maximise space utilisation and waste containment, using a rotating bowl to dispose of waste, which prevents contact with faecal matter. The unit is sealed to prevent insects from entering or exiting the system and uses environmentally friendly products to treat waste, all of which address environmental concerns.
A cleaner, safer future
The need to eliminate pit latrines in South Africa is clear, given the multitude of risks they pose to the health, safety, and environment of communities. While an immediate conversion to waterborne sanitation may not be practical due to water supply and treatment limitations, the development of safer alternatives, such as the dry sanitation unit, offers promising possibilities. By prioritising the implementation of such practical and effective solutions, South Africa can significantly enhance the well-being and quality of life of its communities, making strides towards a future where pit latrines are replaced with safe, sustainable, and healthier sanitation options for all citizens.
Scanning electron micrograph image of Vibrio cholerae. Source: Wikimedia CC0
The Hammanskraal cholera outbreak continues with 17 deaths from the disease reported so far. Poverty is exacerbating the situation, with residents being advised to drink bottled water – but unable to afford it. According to GroundUp, the microbiological compliance (a measure of faecal bacteria) at sewage treatment plants was as low as 2% and 0%, where below 50% is considered ‘bad’.
Characterised by watery diarrhoea and dehydration, cholera is caused by infection by the bacterium Vibrio cholerae and in some cases can cause death within hours. It is spread through contaminated water, and asymptomatic individuals can contribute to the spread by shedding bacteria in faeces for seven to 14 weeks.
The National Institute for Communicable Diseases (NICD) says that treatment is with oral rehydration solution (ORS), with intravenous ringer’s lactate for severe dehydration and antibiotics recommended in hospitalised patients.
For acute cases of watery diarrhoea, the National Institute for Communicable Diseases (NICD) advises the following course of action:
– Notify the case as suspected cholera by completing a Notifiable Medical Conditions case notification form. Do this immediately; don’t wait for laboratory results.
1. Assess and reassess the degree of dehydration frequently.
2. Replace fluid and maintain hydration status based on the degree of dehydration (see flowchart)
3. Antibiotic therapy is recommended for hospitalised patients. Ciprofloxacin is currently the antibiotic of choice: Paediatric dose: 20 mg/kg (max 1g) po stat Adult dose: 1g po stat
4. Children < 5 years of age should be given zinc supplementation.
5. Patients should be fed as soon as they can tolerate food
6. Patients who are no longer dehydrated and can take ORS and have decreased frequency of diarrhoea may be discharged.
Contamination of urban lakes, rivers and surface water by human waste is creating pools of ‘superbugs’ in Low- and Middle-Income Countries (LMIC), according to new research. However, improving access to clean water, sanitation and sewerage infrastructure could help to improve public health.
For the study, researchers studied bodies of water in urban and rural sites in three areas of Bangladesh: Mymensingh, Shariatpur and Dhaka. In comparison to rural settings, they detected more antibiotic resistant faecal coliforms in urban surface water , consistent with reports of such bacteria in rivers across Asia. Their findings were published in mSystems.
Lead author Willem van Schaik, Professor of Microbiology and Infection at the University of Birmingham, commented: “The rivers and lakes of Dhaka are surrounded by highly-populated slums in which human waste is directly released into the water. The presence of human gut bacteria links to high levels of antibiotic resistance genes, suggesting that such contamination is driving the presence of these ‘superbugs’ in surface water.
“Interventions aimed at improving access to clean water, sanitation and sewerage infrastructure may thus be important to reduce the risk of antimicrobial resistance spreading in Bangladesh and other LMICs. While levels of antibiotic resistance genes are considerably lower in rural than in urban settings, we found that antibiotics are commonly used in fish farming and further policies need to be developed to reduce their use.”
Infections from antibiotic-resistant bacteria are on the rise globally, but the clinical issues posed by these bacteria are particularly alarming in LMICs, with significant morbidity and mortality. As in other LMICs, multidrug-resistant E. coli has a relatively high prevalence in healthy humans in Bangladesh.
With a population of around 16 million people, Dhaka’s population density ranks among the highest of any megacity, but less than 20% of its households have a sewerage connection.
Urban surface waters in Bangladesh are particularly rich in antibiotic resistance genes, the researchers discovered, with a higher number of them associated with plasmids — vehicles of genetic exchange among bacteria — indicating that they are more likely to spread through the population.
Antibiotic-resistant bacteria that colonise the human gut can be passed into rivers, lakes and coastal areas through the release of untreated wastewater, the overflow of pit latrines during monsoon season or by practices such as open defecation.
Such contaminated environments are often used for bathing, for the washing of clothes and food utensils, thereby risking human gut colonisation by antibiotic-resistant bacteria.
The researchers from the University of Birmingham and the International Centre for Diarrhoeal Disease Research, Bangladesh called for further research to quantify the drivers of antibiotic resistance in surface waters in Bangladesh.
Journal information: McInnes, R.S., et al. (2021) Metagenome-Wide Analysis of Rural and Urban Surface Waters and Sediments in Bangladesh Identifies Human Waste as a Driver of Antibiotic Resistance. mSystems. doi.org/10.1128/mSystems.00137-21.
