Odontogenic inflammation in humans can spread to adjacent anatomical structures, causing pathological changes that are dangerous to health and, in some cases, life. In this paper, we present an unusual case of odontogenic orbital cellulitis caused by both Lactobacillus rhamnosus and Enterococcus avium, which resulted in blindness of the eye in a 25-year-old man. Orbital cellulitis is more common in children due to the relative immaturity of their immune systems whereas it is rare in adults – in most cases, it occurs as a complication of paranasal sinusitis. An accurate diagnosis requires not only a thorough clinical examination but also appropriate imaging tests (such as a computed tomography or nuclear magnetic resonance test). Successful treatment largely depends on the earliest possible implementation of pharmacological therapy. In cases where it is justified, surgical procedures to decompress and drain the abscess should also be considered. However, in the case described in this publication, the patient did not regain vision in the affected eye despite the implementation of both intensive pharmacological treatment and surgical treatment, probably due to ischemic optic neuropathy and central retinal artery occlusion caused by severe infraorbital oedema.
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