Background: Infectious keratitis is a common ocular pathology and can be caused by a great variety of microorganisms. However, keratitis due to Roseomonas species is an extremely uncommon condition with only two previously reported cases in the literature.
Case presentation: A 70-year-old diabetic male was referenced to ophthalmological emergency due to a corneal ulcer refractory to the treatment with topical moxifloxacin, clotrimazole, prednisolone acetate and oral valacyclovir hydrochloride. The patient had complaints of photosensitivity, pain and blurred vision for 4 weeks. Best corrected visual acuity of the eye was 20/100. Corneal scrapings, collected in the emergency, revealed to be positive for a gram-negative bacillus, producing a pink-pigmented raised colony that was identified, by day 8, as Roseomonas gilardii . Considering the result, the patient immediately started target treatment with topical moxifloxacin and tobramycin. Six days later, there were no signs of active infection. The patient achieved a visual acuity of 20/25.
Conclusion: The course of Roseomonas infection can be insidious and may result in misdiagnosis and delayed target treatment. Corneal scrapers should be done promptly in corneal ulcers refractory to the treatment. It is important to pursue final identification of this pathogen because of its susceptibilities to antibiotics.
Malheiro L, Neves MM, Gomes M and Oliveira L