Cape town: The Department of Health has confirmed the detection of two distinct polio virus strains in wastewater sampled from a treatment plant in Cape Town. This revelation came after communication from the National Institute for Communicable Diseases (NICD).
According to South African Government News Agency, the NICD's routine environmental and wastewater testing aims to proactively track diseases across populations. This involves analyzing municipal sewage and water resources to identify emerging outbreaks and viral variants before clinical cases emerge. The department clarified that the detections are termed 'vaccine events' since no actual cases of the virus have been identified in individuals. While these events necessitate a public health response, they are not considered high risk and do not require an additional vaccination campaign.
The Department of Health emphasized that polio is a vaccine-preventable disease, with South Africa having been declared polio-free by the World Health Organisation's African Regional Certification Commission in 2019. The detected viruses in the wastewater are likely linked to imported cases involving individuals vaccinated with different vaccines than those used domestically. This situation does not equate to an outbreak.
In response, the department, in collaboration with the NICD, has initiated appropriate health response activities. These include strengthening surveillance measures and increasing the frequency of environmental sampling of wastewater. South Africa remains committed to maintaining outbreak preparedness plans, particularly in light of sporadic outbreaks in other countries and cross-border movements.
Symptoms associated with the virus include progressive muscle or joint weakness and pain, fatigue, muscle wasting, breathing or swallowing problems, and sleep-related breathing disorders. However, the department noted that these symptoms are common to other health conditions as well.
While there is no immediate cause for public concern, the department urges the public to remain vigilant and report any suspected symptoms of polio to the nearest healthcare provider promptly.