New pollen monitoring network maps allergy hotspots across South Africa

South Africa has unveiled its first comprehensive five-year pollen calendars, a pioneering effort by the South African Pollen Monitoring Network established seven years ago. These calendars map out when and where different plants release pollen across various natural regions, providing crucial information for the estimated 20% to 30% of South Africans affected by allergic rhinitis and many who suffer from asthma.

The network standardized pollen collection methods across multiple sites, including inland grasslands like Johannesburg and Bloemfontein, savanna regions such as Pretoria and Kimberley, and coastal areas like Cape Town, Durban, and Gqeberha. Findings show grass pollen is the most common allergen nationwide, with Bloemfontein recording the highest pollen levels overall, Johannesburg having the most tree pollen, and Kimberley the most grass pollen.

This research addresses the previous lack of consistent, long-term pollen monitoring in South Africa, which left patients and doctors uncertain about allergy triggers and optimal timing for preventive medication. By providing detailed pollen calendars, the network aims to improve allergy management and public health outcomes for millions of South Africans.