Abstract：
BACKGROUND:Histopathologic studies of this unusual keratitis caused by Capnocytophaga species have not been reported previously. METHODS:The authors report the light microscopic and ultrastructural findings of three patients with a distinctive necrotizing keratitis caused by an anaerobic gram-negative bacillus. In three patients, ages 19, 81, and 91 years, a necrotizing stromal keratitis developed; two of these patients had a previous penetrating keratoplasty for pseudophakic bullous keratopathy. The first patient did not have ocular surgery previously and was treated initially for presumed Acanthamoeba keratitis. RESULTS:By light microscopy, all three keratectomy specimens were strikingly similar and showed a necrotizing and/or suppurative stromal keratitis displaying myriad slender, fusiform, gram-negative bacilli located anterior to Descemet's membrane and extending into the deep corneal stroma, assuming a "picket fence" appearance. Cultures of the cornea in case 1 grew Capnocytophaga ochracea. For the remaining two patients, a diagnosis presumptively was made based on characteristic histopathologic features. Results of electron microscopic examination showed numerous bacilli that were mostly extracellular; occasional organisms were phagocytosed by macrophages. CONCLUSION:The histopathologic features of Capnocytophaga keratitis are unique; therefore, a presumptive diagnosis can be made based on the morphology and location of the bacilli in the keratectomy specimens. To the authors' knowledge, this is the first study describing the typical histopathologic and electron microscopic findings of Capnocytophaga keratitis.
journal_name
Ophthalmologyjournal_title
Ophthalmologyauthors
Font RL,Jay V,Misra RP,Jones DB,Wilhelmus KRdoi
10.1016/s0161-6420(94)31081-5subject
Has Abstractpub_date
1994-12-01 00:00:00pages
1929-34issue
12eissn
0161-6420issn
1549-4713pii
S0161-6420(94)31081-5journal_volume
101pub_type
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