The purpose of this study was to assess the epidemiology of endophthalmitis after cataract surgery in a national prospective survey in Australia and New Zealand.
Cases of presumed infectious endophthal-mitis (PIE) after cataract surgery were prospectively identified by active surveillance through the newly established Australian and New Zealand Ophthalmic Surveillance Unit (ANZOSU). The ANZOSU requested all specialist ophthalmologists in Australia and New Zealand to report new cases of PIE via a monthly email reporting system. Case notification was requested for the 18 month period between May 2010 and October 2011. Post cataract PIE was defined as focal or diffuse, acute or chronic intraocular inflammation that is pre-sumed or proven to be due to microbial infection and treated as such.
Data was available on 21 of 27 reported cases. The minimum estimated incidence of PIE was 0.011 per 1000 cataract operations and the corrected incidence was 0.34 per 1000 cataract operations. For prophylaxis at surgery all patients received povidine iodine, 56% intracameral antibiotics and 24% subcon-junctival antibiotics. From the intraocular samples taken 74% were positive, and 71% of the positive samples were from the vitreous only. All patients received intravitreal antibiotics as treatment.
The incidence of PIE after cataract surgery in Australia and New Zealand is low, although under-reporting is likely in this study. Ophthal-mologists should improve their reporting rate to ANZOSU.