Rhizobium radiobacter: A Recently Recognized Cause of Bacterial Keratitis

Nigel H. Barker, Jordan M. Thompson, Martin G. Mullen, Melissa A. Weekes, Linda N. Nguyen, Crystal K.M. Haynes, Darlene Miller

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Purpose: To present the first reported cases of keratitis caused by Rhizobium radiobacter. Methods: A retrospective review of an observational case series from 2 institutions. Results: There were 4 cases of microbiologically proven R. radiobacter. Three of these patients were contact lens wearers. The patient in case 4 defaulted from follow-up after receipt of the culture result. Keratitis in the other cases resolved with variable clinical courses once culture-directed therapy was instituted. Conclusions: R. radiobacter is a member of the genus Rhizobium. It is a gram-negative bacillus and was previously identified as an opportunistic pathogen in nonophthalmic infections and in a few cases of endophthalmitis. To our knowledge, we have described the clinical presentation, management, and treatment outcomes of the first reported cases of keratitis caused by R. radiobacter.

Original languageEnglish (US)
Pages (from-to)679-682
Number of pages4
Issue number5
StatePublished - Jan 1 2016


  • Rhizobium radiobacter
  • culture
  • infiltrate
  • keratitis
  • treatment

ASJC Scopus subject areas

  • Ophthalmology


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