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    Do the Alterations in Eyelid and Conjunctival Flora Lead to Streptococcal Endophthalmitis in Glaucoma Patients?
    (Turkish Ophthalmological Soc, 2010) Eser, Ilker; Beskoc, Melike; Erdogan, Hawa; Nakipoglu, Yasar; Eren, Hakan; Aydin, Derya; Yilmaz, Omer F.
    Purpose: To compare the eyelid and conjunctival flora of glaucoma patients with normal subjects. Material and Method: One hundred and thirty-two eyes of 83 patients were assigned to 4 groups, consisting of 33 eyes each. Group 1 consisted of eyes which underwent trabeculectomy without need for postoperative antiglaucoma drops (AGD), group 2 consisted of eyes which needed to use AGD following the trabeculectomy, group 3 consisted of eyes which did not undergo trabeculectomy but used AGD, and group 4, the control group, consisted of healthy eyes. All AGD contained benzalkonium chloride (BAC) as a preservative. Results: A statistically significant difference was found between the group using AGD and the control group, regarding the number of coagulase-negative staphylococci isolated from eyelid specimens (p=0.03). Although the isolation rates of Streptococcus spp. and Haemophilus spp. were higher in groups 1, 2 and 3 than in the control group for the conjunctival specimens, the difference was not statistically significant (p=0.87, p=0.29, respectively). Discussion: Trabeculectomy together with long-term use of AGD, or long-term use of AGD with BAC itself, seemed to decrease the number of coagulase-negative Staphylococci and to increase the number of Streptococcus spp. and Haemophilus spp. in the eyelid and conjunctival flora of the control group. As Streptococcus spp. predominate in cases of delayed-onset bleb-associated endophthalmitis, by taking eyelid and conjunctiva specimens for culture at certain intervals, their eradication might be achieved and therefore, the potentially devastating endophthalmitis might be prevented.
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    Isolates and antibiotic sensitivity of eighty culture-proven endophthalmitis cases from Istanbul
    (Karger, 2008) Eser, Ilker; Kapran, Ziya; Altan, Tugrul; Karatas, Meltem Ozel; Aydin, Derya; Okaygun, Eda; Yilmaz, Omer Faruk
    Purpose: To investigate the spectrum of organisms causing endophthalmitis and their sensitivity to commonly used antimicrobial agents. Methods: Medical records of 80 consecutive patients treated at Beyoglu Eye Hospital for endophthalmitis from January 2001 to April 2006 were reviewed. Specimens were obtained from either the vitreous (93%, 81/87) or anterior chamber (7%, 6/87) during pars plana vitrectomy or vitreous tap, and were inoculated into blood culture bottles. A Kirby-Bauer disk diffusion test was performed to determine antibiotic susceptibility. The outcome measures included isolates identified and antibiotic sensitivity of the specimens. Results: Fifty-six of 87 (64.4%) isolates were Gram-positive organisms, 29 (33.3%) were Gram-negative organisms, and 2 (2.3%) were fungi. The most common organism group identified was coagulase-negative staphylococci in 26.4% (23/87). While vancomycin was active against all Gram-positive isolates tested (100%), ceftazidime had the highest susceptibility rate (100%) for Gram-negative organisms isolated. Conclusions: Although coagulase-negative micrococci predominated in this series, a high isolation rate for Gram-negative organisms was obtained. High susceptibility rates for ofloxacin make it an alternative to ceftazidime and vancomycin in both Gram-negative- and Gram-positive-derived endophthalmitis, respectively. Studies with larger series and additional antibiotics are needed to confirm these findings. Copyright (C) 2008 S. Karger AG, Basel.