Open Outbreak

Diphtheria outbreak in South Africa

Pathogen: diphtheria · Region: South Africa, especially Western Cape, Limpopo and Gauteng · Status: monitoring · Tier: high · Updated

Should I be worried? · Pathogen library: diphtheria · South Africa

South Africa is being monitored for an ongoing diphtheria outbreak. In the outbreak record provided for this dossier, the official South African picture is described as 43 confirmed respiratory diphtheria cases and 10 asymptomatic toxigenic carriers identified since late 2025, with transmission across at least Western Cape, Limpopo and Gauteng. I was not able to retrieve the underlying South African/NICD bulletin within the tool budget, so those country figures are included as uncited official context rather than tool-verified evidence. What is tool-verified is the wider WHO context: WHO’s 2025 African Region Disease Outbreak News item lists South Africa among eight affected member states and assesses regional public health risk as high, while global risk is low. WHO also stresses that case confirmation and management are constrained by limited diagnostics and a global shortage of diphtheria antitoxin. No separate media tally could be verified in this session. Outbreak Tracker had no collected reports for this record, and both news-search attempts failed, so I could not establish a clear official-versus-media divergence. The main things to watch are whether South Africa reports spread into additional provinces, whether severe cases or deaths rise, and whether antitoxin supply and vaccination response are sufficient to interrupt transmission.

The main risk drivers are efficient respiratory transmission, apparent spread across multiple South African provinces, and the disease’s potential for severe and sometimes fatal toxin-mediated illness. Risk is moderated by the existence of vaccines and treatment, but WHO notes that outbreak control is hindered by diagnostic constraints and a global diphtheria antitoxin shortage, while Gauteng raises connectivity concerns.

Situation as of 16 Oct 2026

Official

Official South African reporting, as described in the outbreak record for this dossier, is that an ongoing outbreak has produced 43 confirmed respiratory diphtheria cases and 10 asymptomatic toxigenic carriers since late 2025, with affected provinces including Western Cape, Limpopo and Gauteng. A South Africa-specific official bulletin was not retrieved in this session, but WHO has confirmed South Africa as one of the African Region countries affected by diphtheria outbreaks.

Media, unverified

No separate media tally was verified in this session. Outbreak Tracker had no collected reports for this outbreak record, and both recent news searches failed.

Control measures

WHO says outbreak control requires timely case detection, laboratory confirmation, clinical management with diphtheria antitoxin and appropriate antibiotics, infection prevention and control, sustained vaccination, and risk communication. South Africa-specific control measures were not retrieved in this session.

Timeline