Topical antibiotics were given on the day of injection in
361 (9.4%) of the 3838 cases, for several days after injection
in 813 cases (21.2%), on the day of injection and
after injection in 1388 cases (36.2%), and neither on the
day of injection nor after injection in 1276 cases (33.3%).
Three cases of culture-positive endophthalmitis occurred
after ranibizumab injections (0.09%), and no cases
occurred after triamcinolone injections. In all 3 cases of
endophthalmitis, topical antibiotics were given for several
days after the injection but not before injection.