Table 3 Ocular predisposing factors for SMK and their percentage out of 506.

Predisposing factor	No. of isolates					Total culture positive cases	Culture negative cases	Total no. (%) out of 396 cases of SMK
	Staphylococcus keratitis	Streptococcus keratitis	Pseudomonas keratitis	Other bacteria keratitis	Fungal keratitis
Corneal abrasions (total)	3	2	37	1	67	110	46	156 (39.4%)
Abrasions by organic materials	2		8		57	67	28	95
Abrasions induced by traditional healers			19		8	27	2	29
Other abrasions (stones, minerals, wood, fingernail	1	2	10	1	2	16	16	32
Ocular surface disorders	64	12		5	5	83***	48	131 (33.1%)
Contact lens wear			21			21	3	24 (6.1%)
Prior ocular surgery with use of topical corticosteroids	1	2			2	4*	14	18 (4.6%)
Swimming or washing in marshes or stagnant water							4	4 (1%)
Total	68	16	58	6	74	218****	115	333 (84.1%)

*Each asterisk indicates a case of mixed growth (bacteria and fungi).