title: Periorbital cellulitis caused by Bacillus thuringiensis.
abstract: OBJECTIVE
  Periorbital cellulitis is an inflammation of the lids and periorbital tissues without signs of true involvement such as proptosis or limitation of eye movement.
  
  
  METHODS
  Bacillus thuringiensis is a Gram-positive, spore-forming soil bacterium with the ability to produce insecticidal crystal proteins. B thuringiensis is an extremely rare causative organism of orbital and periorbital infections. However, it was rarely seen isolated in pediatric cases with preseptal cellulites. Ocular infections of this bacteria quickly progress, within 12-48 hours from inoculation, leading to endophthalmitis or panophthalmitis and irreversible vision loss.
  
  
  RESULTS
  Periorbital cellulitis should be recognized promptly and treated carefully. Hospitalization, prompt systemic antibiotic therapy, and careful monitoring for signs of sepsis and local invasion are critical.
  
  
  CONCLUSIONS
  We report a rare presentation of periorbital cellulitis caused by B thuringiensis.
authors.affiliation: Department of Pediatrics, Yuzuncu Yil University School of Medicine, Van, Turkey. pekererdal@hotmail.com
authors.forename: Erdal
authors.initials: E
authors.lastname: Peker
authors.forename: Eren
authors.initials: E
authors.lastname: Cagan
authors.forename: Murat
authors.initials: M
authors.lastname: Dogan
authors.forename: Adil
authors.initials: A
authors.lastname: Kilic
authors.forename: Huseyin
authors.initials: H
authors.lastname: Caksen
authors.forename: Osman
authors.initials: O
authors.lastname: Yesilmen
mesh_terms: D016863:Bacillaceae Infections / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D001413:Bacillus thuringiensis / Q000302:isolation & purification*; D002648:Child; D004359:Drug Therapy, Combination; D015818:Eye Infections, Bacterial / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D005260:Female; D006801:Humans; D008775:Methylprednisolone / Q000627:therapeutic use; D008826:Microbial Sensitivity Tests; D054517:Orbital Cellulitis / Q000175:diagnosis / Q000188:drug therapy / Q000382:microbiology*; D010400:Penicillin G / Q000008:administration & dosage
chemical_list: D010400:Penicillin G; D008775:Methylprednisolone