The National Institute for Communicable Diseases (NICD) has urged citizens to check their children’s vaccination status due to a rise in diphtheria cases in the country.
Since the beginning of 2025, up until 23 March, diphtheria, caused by the bacterium Corynebacterium diphtheriae, has been confirmed in 40 people in South Africa.
Of these cases, 19 exhibited symptoms, while 21 were asymptomatic.
“These asymptomatic individuals were carriers identified during contact tracing,” the statement read.
According to data from the NICD, there were 15 reported cases of respiratory diphtheria in the Western Cape, two cases in Gauteng, three cases in Mpumalanga, and one probable case in Limpopo.
Laboratory tests did not confirm the case from Limpopo, but the person exhibited symptoms consistent with respiratory diphtheria.
Over 78% of the cases have occurred in adults aged 18 and older.
Among the symptomatic cases, the public health institute said it was important to note that nine people have died, resulting in a case fatality rate of 27% (nine out of 33 cases) since the beginning of 2024.
“Adults who have not had a diphtheria vaccine in the last 10 years are urged to seek vaccination at a clinic or with their usual healthcare provider.
“Pregnant women are advised to get the vaccine with each pregnancy to protect the baby from diphtheria, tetanus, and pertussis.”
Diphtheria is a contagious, severe, vaccine-preventable illness usually associated with a sore throat, fever, and large, swollen glands in the neck.
The NICD said this illness is sometimes called a “bull neck”, and on examining a patient, the doctor will see a characteristic adherent membrane over the tonsils and the throat, also known as a “pseudomembrane”.
“If not treated early, the public health institute said diphtheria causes difficulty in breathing and can lead to complete blockage of the airway and death. The organism also produces a toxin that affects the heart muscle, kidneys, and nervous system, leading to life-threatening illness.”
Treatment is with diphtheria antitoxin to neutralise the toxin produced by the bacterium and appropriate antibiotics to eradicate the organism, which should be given early to be effective.
The NICD is encouraging doctors and healthcare workers to be on high alert for suspected diphtheria cases and are urged to report cases on the Notifiable Medical Condition app or the NICD website.
The NICD said the best protection against diphtheria is vaccination.
Infant vaccine is given at six, 10, and 14 weeks of age, with booster doses at 18 months and six and 12 years.
The available vaccines include Dt (diphtheria and tetanus) and DTaP (diphtheria, tetanus, and acellular pertussis or whooping cough). – SAnews.gov.za
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