Herbicides in Water Sources: Communicating Potential Risks to the Population of Mangaung Metropolitan Municipality, South Africa

Pesticides are an important tool for maintaining and improving the global population's standard of living. However, their presence in water resources is concerning due to their potential consequences. Twelve water samples from rivers, dams/reservoirs, and treated drinking water were collected from Mangaung Metropolitan Municipality in South Africa. The collected samples were analysed using high-performance liquid chromatography linked to a QTRAP hybrid triple quadrupole ion trap mass spectrometer. The ecological and human health risks were assessed by risk quotient and human health risk assessment methods, respectively. Herbicides, such as atrazine, metolachlor, simazine and terbuthylazine, were analysed in water sources. The average concentrations of simazine in rivers (1.82 mg/L), dams/reservoirs (0.12 mg/L), and treated drinking water (0.03 mg/L) were remarkable among all four herbicides detected. Simazine, atrazine, and terbuthylazine posed high ecological risks for both acute and chronic toxicity in all water sources. Moreover, simazine is the only contaminant in the river water that poses a medium carcinogenic risk to adult. It can be concluded that the level of herbicide detected in water sources may affect aquatic life and human beings negatively. This study may aid in the development of pesticide pollution management and risk reduction strategies within the municipality.

The prevalence of underweight in children aged 5 years and younger attending primary health care clinics in the Mangaung area, Free State

Background

The Constitution of South Africa stipulates that all children have the right to basic nutrition; however, a great number of South African children are underweight for age. It is important to address malnutrition as it is associated with more than 50% of all child deaths in developing countries and also increases the risk for infective diseases.

Aim

To determine the prevalence of underweight in children aged 5 years and younger attending primary health care clinics in the Mangaung area, Free State, and determine the possible underlying causes thereof.

Setting

Six preselected primary health care clinics in the Mangaung area.

Methods

This was a cross-sectional study. Demographic and clinical information and anthropometric measurements were collected from the children’s Road-to-Health clinic cards, obtained from the children’s caregivers.

Results

In total, 240 children were included, of which 51.7% were girls. The median age was 7.5 months. The weight-for-age graph revealed that 7.7% (95% confidence interval: 4.8%; 11.9%) of children were underweight or severely underweight for age. Length-for-age and weight-for-height graphs were mostly incomplete. Underweight children differed from normal weight children regarding birth weight (low birth weight 70.6% vs. 12.4%) and history of malnutrition (60.0% vs. 7.1%).

Conclusion

The prevalence of underweight in children aged 0–5 years attending primary health care clinics in Mangaung is 7.7% based on information available from Road-to-Health cards. This figure could be higher if these cards were filled in more accurately. A low birth weight and history of malnutrition are associated with underweight.