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30 JUNE - 26 JULY 2021
Breaking the echo chamber in the city bowl and beyond.
Drugs in our sea A new scientific study reveals pharmaceutical chemicals are present in False Bay seawater, and accumulating up the food chain. Photo: Steve Kretzmann
• Pharmaceuticals, including antibiotics and anti-inflammatories, are accumulating in False Bay • Sewage and urban runoff causing contamination Steve Kretzmann
False Bay receives so much persistent pollution from Cape Town that antibiotics and anti-inflammatory drugs are in the seawater, and accumulating up the food chain. This has implications for antibiotic resistance, which the World Health Organisation states is one of the biggest threats to global health, food security, and development today. Antibiotic resistance occurs due to bacteria being
exposed to non-lethal doses of the antibiotic drugs. As a result, antibiotic medication becomes ineffective in treating infections and diseases such as pneumonia and tuberculosis. Diclofenac- an anti-inflammatory drug sold over the counter as Voltaren – and the antibiotic Sulfamethoxazole, are present in False Bay’s waves, as well as in the sediment, seaweed, and marine invertebrates such as mussels, limpets, sea snails, sea urchins, and starfish. This is made known in the recent publication of findings by scientists
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Cecilia Y. Ojemaye and Leslie Petrik from the University of the Western Cape’s Chemistry Department. Ojemaye and Petrik took samples of seawater, sediment, seaweed, and marine invertebrates from eight sites in False Bay - from Miller’s Point on the south western side, to Rooi Els on the south eastern side - in 2018. The sites were chosen for being near wastewater treatment works which treat industrial, medical, and domestic wastewater and sewage before releasing it into the sea. Besides Diclofenac and
Sulfamethoxazole, Ojemaye and Petrik tested for six other pharmaceutical and personal care products (PPCPs), which are known as persistent chemical compounds as they fail to break down in the environment. Their paper is titled Pharmaceuticals and Personal Care Products in the Marine Environment Around False Bay, Cape Town, South Africa: Occurrence and RiskAssessment Study. More on Page 2
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