Abstract:
BACKGROUND:Dolosigranulum pigrum is a commensal inhabitant of the upper respiratory tract suspected to be responsible for ocular infections but no well-described case of D. pigrum corneal infection has been reported. Herein culture and PCR-sequencing-based investigations of corneal scraping specimens confirmed D. pigrum keratitis in three patients. CASE PRESENTATION:Three elderly patients presented with unilateral keratitis. None was a corneal-contact lens wearer, one had previous cataract surgery and another suffered rheumatoid arthritis sicca syndrome. Culturing the corneal scraping specimen was positive for two cases and PCR-sequencing of bacterial 16S rDNA in the presence of negative controls identified D. pigrum in three cases. The two D. pigrum isolates were in-vitro susceptible to penicillin G, amoxicillin, doxycycline, rifampicin and gentamicin. In all cases, surgical treatment of corneal thinning was necessary, but corneal perforation occurred in two cases despite intensive antimicrobial treatment with ticarcillin, gentamicin and vancomycin or levofloxacin eye drops leading to enucleation in one case. CONCLUSIONS:D. pigrum is the likely cause of corneal infection in three patients, with effective antibiotic treatment in two patients.
journal_name
BMC Ophthalmoljournal_title
BMC ophthalmologyauthors
Sampo M,Ghazouani O,Cadiou D,Trichet E,Hoffart L,Drancourt Mdoi
10.1186/1471-2415-13-31subject
Has Abstractpub_date
2013-07-10 00:00:00pages
31issn
1471-2415pii
1471-2415-13-31journal_volume
13pub_type
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