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[Endophthalmitis in Japan--a nationwide study with reference to type and etiology].

A nationwide clinical study on bacterial and fungal endophthalmitis was done with special reference to their type and etiology. Two hundred and eighty cases of endophthalmitis were reviewed. All cases were divided into two categories such as exogenous (trauma, surgery, and ulcer) and endogenous (metastasis). Penetrating trauma was responsible for 93 cases (33.2%), surgery for 88 cases (31.4%), ulcer for 11 cases (3.9%) and metastasis for 88 cases (31.4%). Out of the 280 cases, 79 cases (28.2%) were microbiologically diagnosed through aqueous or vitreous tap or biopsy. The total numbers of isolated organisms amounted to 87 consisting of 43 Gram-positive bacteria, 30 Gram-negative bacteria and 14 fungi. The positive isolation was 31 out of 86 (36%) from the aqueous and 52 out of 103 (50%) from the vitreous. Exogenous types associated with trauma, surgery or ulcer were mainly caused by Gram-positive bacteria of 37 strains, led by coagulase-negative staphylococci in 14 cases. On the other hand, endogenous cases were mainly due to Gram-negative bacteria of 14 strains including Klebsiella pneumoniae in 5 cases, E. coli in 4 cases and fungi of 11 strains including candida spp in 9 cases.