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Influence of intraocular lens haptic material on bacterial isolates from anterior chamber aspirate
V Agrawal1, U Gopinathan, S Singh
1Sight Savers Cornea Training Center, Hyderabad, India.
Purpose:
To determine whether intraocular lens (IOL) type affects the bacterial count in anterior chamber aspirates obtained immediately after cataract surgery.
Setting:
L.V. Prasad Eye Institute, Hyderabad, India.
Methods:
This in vivo study evaluated two groups of eyes that had uneventful cataract extraction and implantation of one of two types of IOLs: all poly(methyl methacrylate) (PMMA) (n = 73) or polypropylene haptic (n = 83). Anterior chamber fluid aspirates (0.1 mL) were obtained with a 30 gauge cannula at the end of surgery and inoculated onto chocolate agar and in thioglycolate broth. Microbiology evaluation was performed using standard methods.
Results:
Seven eyes (9.5%) with all-PMMA IOLs and 21 (25.3%) with polypropylene haptic IOLs were positive for bacterial isolates (P = .0322; chi-square test). Mean colony count (+/-SD) was 11.43 +/- 3.78 and 13.16 +/- 4.78 colony-forming units/ milliliter in the PMMA and polypropylene haptic IOL groups, respectively. No eye developed endophthalmitis.
Conclusion:
Polypropylene haptic IOLs were associated with a significant increase in bacteria in the anterior chamber.