Clinical presentation
Patients with infections due to S. intermedius usually present
nonspecific symptoms such as fever, chills, and general discomfort among
the cases described. However, additionally, patients would exhibit
symptoms related to the body side affected by it, for example, seizures,
headaches, nausea and vomiting in brain abscesses10,11 or cough, sputum production, shortness of
breath, and hemoptysis in pneumonia, empyema, and lung abscesses5,12,13, which are uncommon clinical complications
from S. intermedius with few cases currently described (Table 1).
Moreover, chest pain, chest distress, and even respiratory failure have
been described in pleural effusion and mediastinal abscess due to SAG,
besides, odynophagia and cervicodynia in oropharynx infections2.
Also, it has been described with Haemophilus parainfluenzae as the
causative pathogens in a pulmonary abscess in a 75-year-old man14. Besides, other rare infections in body sites due
to S. intermedius have been described, such as a recently described case
in which discitis was reported due to contiguous infection due to a lung
abscess of the posterior right lower lobe due to S. intermedius15. It has also been described as a causative pathogen
in Lemierre syndrome in a 21-year-old man with S. intermedius bacteremia16 and in a 29-year-old woman who developed multiple
lung abscesses secondary to a uterine empyema caused by an intrauterine
device with the S. milleri group as the causative agent isolated17. Furthermore, isolated pulmonary nodules and
infective endocarditis due to S. intermedius have also been described4,18,19. In our case, blood cultures were performed
with a negative result, and no signs or symptoms related to probable or
confirmed endocarditis were found. Moreover, a left thoracic artery
pseudoaneurysm has been described as a secondary complication of a lung
abscess in a 66-year-old man 20.