The incidence of empyema has reportedly increased in some highincome countries since the introduction of childhood seven-valent pneumococcal conjugate vaccine (PCV), [1-4] although there is a paucity of such data from low-and middle-income settings. Recent studies from South Africa (SA) and the USA suggested a decrease in the incidence of empyema since the introduction of 13-valent PCV. [5,6] Nonetheless, Streptococcus pneumoniae (serotypes 1, 3 and 19A) remains the commonest (10-48%) pathogen identified, followed by Staphylococcus aureus (8-19%), and less commonly Haemophilus influenzae and Mycoplasma pneumoniae. [3,5] In tuberculosis (TB)endemic settings, Mycobacterium tuberculosis (MTB) may account for 10-14% of cases. [5] However, studies in high-income countries indicate that in most instances the aetiology of the empyema may be unknown, as <30% of blood, pleural fluid or sputum cultures yield an organism. [3] The use of molecular techniques has been shown to improve diagnostic yield. [4] The management of empyema remains challenging, even in highincome countries. [3] Antibiotics alone have been recommended in children with no respiratory compromise, and fibrinolytics are recommended with either pigtail or intercostal drain (ICD) insertion in patients with respiratory compromise or failure to respond to antibiotics. Early video-assisted thorascopic surgery (VATS) for drainage, used as first-line treatment, has not been shown to improve outcomes at 6 months compared with use of an ICD and fibrinolytics. [7,8] The use of fibrinolytics may reduce the need for more invasive and expensive surgical options. Objectives To describe the clinical epidemiology of empyema at a secondarytertiary hospital with a paediatric pulmonology referral service, in a setting of high HIV and TB prevalence. Methods A retrospective descriptive study was undertaken in children aged <14 years at Chris Hani Baragwanath Academic Hospital (CHBAH) over the 5-year period January 2012-December 2016. CHBAH is a secondary-tertiary academic hospital situated in Soweto, a periurban and mostly low-income township south of Johannesburg, SA. In addition to providing a paediatric service to the residents of Soweto, this hospital is the referral centre for hospitals in the surrounding areas. The prevalence of childhood HIV infection is 3-4%, while 30% of newborns are HIV-exposed in this setting. [9] This open-access article is distributed under Creative Commons licence CC-BY-NC 4.0.