title: Pigmented hypopyon in association with Listeria monocytogenes endopthalmitis: an interesting case report following refractive surgery procedure with literature review.
abstract: OBJECTIVE
  Listeria monocytogenes is an aerobic, motile, gram positive bacillus recognized as an intercellular pathogen in human where it most frequently affects neonates, pregnant women, elderly patients, and immunosuppressed individuals as well as healthy persons. Ocular listeriosis is rare, most frequently in the form of conjunctivitis, but has been also shown to cause rarely endophthalmitis with pigmented hypopyon and elevated intraocular pressure such as in our case.
  
  
  METHODS
  We are reporting one immunocompetent patient presenting with dark hypopyon following laser refractive procedure. His clinical findings, investigations, and further management are all described with relevant literature review of similar cases.
  
  
  RESULTS
  Diagnosis of ocular listeriosis was confirmed by positive culture of anterior chamber (AC) aspirate with identification of the above organism. His visual outcome was satisfactory with good preserved vision.
  
  
  CONCLUSIONS
  We believe that his ocular infection was exogenous and that ophthalmologists should be aware of the causative organisms of colored hypopyon to avoid delayed diagnosis.
authors.affiliation: Department of Pathology and Laboratory Medicine, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
authors.forename: Hind M
authors.initials: HM
authors.lastname: Alkatan
authors.affiliation: Vitreoretinal Division, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
authors.forename: Hassan A
authors.initials: HA
authors.lastname: Al-Dhibi
authors.affiliation: Department of Research, Glaucoma Division, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
authors.forename: Deepak P
authors.initials: DP
authors.lastname: Edward
authors.affiliation: Anterior Segment Division, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Al-Rajhi
mesh_terms: D000038:Abscess / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D000328:Adult; D000867:Anterior Chamber / Q000382:microbiology* / Q000473:pathology; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D009877:Endophthalmitis / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D019654:Lens Implantation, Intraocular; D008089:Listeria monocytogenes / Q000302:isolation & purification*; D008088:Listeriosis / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D008297:Male; D010400:Penicillin G / Q000627:therapeutic use; D018918:Phacoemulsification; D011183:Postoperative Complications
chemical_list: D000900:Anti-Bacterial Agents; D010400:Penicillin G
keywords: Endophthalmitis; Laser-assisted in situ Keratomileusis; Listeria; Pigmented Hypopyon