An additional case of diphtheria was confirmed on the 16th August 2017 bringing to four the total number of laboratory -confirmed cases since the index case presented during the week of the 26th July 2017. This additional case is an adult who was investigated as a contact of the index case. Preliminary laboratory tests supported the diagnosis of diphtheria. This patient is in a stable condition. In addition to these four confirmed cases of diphtheria, there is one asymptomatic carrier. The index case was a 10-year old child who demised on 4th August 2017. The other two confirmed cases, siblings of the index case, received treatment with diphtheria anti-toxin along with appropriate antibiotic treatment and they remain in a stable condition.
Provincial and district health services in the Western Cape have so far identified over 600 contacts including family and household members, pupils at the school attended by the index case and health care workers who provided care in order to identify and prevent additional cases. The contacts have been immunised and provided with preventive antibiotic therapy.
Diphtheria is caused by a bacterium Corynebacterium diphtheriae, and is transmitted by droplet spread and direct contact with infected persons. Diphtheria is preventable by vaccination given at 6, 10, 14 weeks, with booster doses given at 18 months, 6 years and 12 years of age. Persons who are in contact with a confirmed case should receive post-exposure prophylaxis including antibiotics and vaccination to prevent spread of the bacterium, and should have a pharyngeal swab taken.
Two confirmed cases of diphtheria were identified in KwaZulu-Natal (KZN) Province in 2016, and an outbreak of 15 cases occurred in eThekwini, KZN Province in 2015. In the KwaZulu-Natal cases, the majority of children who developed disease were not vaccinated or were partially vaccinated.
The public are urged to ensure that all children are up to date with vaccinations, especially with the booster vaccinations given to school-age children, ages 6 & 12 years. Healthcare workers across the country are advised to be on the alert for patients presenting with clinical symptoms suggestive of diphtheria according to the case definition below:
“A suspected case of diphtheria is any person who presents with an upper respiratory tract illness characterised by sore throat, low-grade fever, AND an adherent membrane of the nasopharynx, tonsils or larynx.”
For more information on diphtheria, see links below: