Test organisms- 1. Candida albicans (ATCC No. 10231) 2. Aspergillus brasiliensis (ATCC No. 16404) (formerly Aspergillus niger) 3. Escherichia coli (ATCC No. 8739) 4. Pseudomonas aeruginosa (ATCC No. 9027) 5. Staphylococcus aureus (ATCC No. 6538)