MALDI-TOF vs. VITEK 2 for identification of Aggregatibacter actinomycetemcomitans chest wall abscess

•A 56-year-old male patient has a chest wall abscess with intercostal muscle involvement.•Aggregatibacter actinomycetemcomitans was misidentified as Pasturella canis or Pasturella multocida by the automated VITEK 2 system.•The study re-enforces the importance of an accurate and rapid diagnosis to assist patient management.