ObjectiveThe diagnosis and treatment of sternal wound infections with mycobacteria are
challenging. Such an infection is often associated with a delayed diagnosis
and improper treatment that may lead to a worsened clinical outcome. The
present study is designed to highlight its clinical features so as to
facilitate a prompt diagnosis and timely treatment.MethodsMEDLINE, Highwire Press, and Google search engine were searched for
publications in the English language, with no time limit, reporting on
sternal wound infection caused by tuberculosis after cardiac surgery.ResultsA total of 12 articles reporting on 14 patients were included in this study.
Coronary artery bypass grafting was the underlying surgical procedure in
more than half of the cases. Purulent discharge and cold abscess were the
two main presenting symptoms. Diagnosis of sternal wound infection was
evidenced in all 14 patients by different investigations, with culture of
samples being the most sensitive method of identifying the pathogen. Good
response to first-line anti-tuberculous agents was noted. Almost all
patients required surgical debridement/resection and, sometimes, sternal
reconstruction. A delayed diagnosis of sternal wound infection may lead to
repeated recurrences. A comparison between patients with sternal wound
infection due to tuberculosis and non-tuberculous mycobacterial infections
showed that the former infections took an even longer period of time.
Comparisons also revealed patients with sternal tuberculosis infection had a
significantly higher mortality than patients with sternal non-tuberculous
infection (29.2% vs. 0%, P=0.051).ConclusionSternal infection caused by tuberculosis after cardiac surgery has a longer
latency, better response to first-line drugs, and better outcomes in
comparison with non-tuberculous sternal infection. Early diagnosis and early
anti-tuberculous treatment can surely improve the patients' prognosis.