TABLE 1.

Composition of MacConkey agar from seven countries and eight different manufacturers

Countries	Manufacturer	Composition (g/liter)
United States-1	BD	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 13.5; neutral red, 0.03; crystal violet, 0.001
United States-2	Microbiology Intl.	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 13.5; neutral red, 0.03; crystal violet, 0.001
United Kingdom	Mast	Peptone, 14.6; lactose, 10; bile salts, 0.004; sodium chloride, 5; agar, 14; neutral red, 0.03; crystal violet, 0.001
Canada	Oxoid	Peptone, 20; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 15; neutral red, 0.03; crystal violet, 0.001
France	Biokar Diagnostics	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 13.5; neutral red, 0.03; crystal violet, 0.001
India	Hi medium	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 13.5; neutral red, 0.03; crystal violet, 0.001
Italy	Liofilchem	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 15; neutral red, 0.03; crystal violet, 0.001
China	HKM	Pancreatic digest of gelatin, 17; peptone, 3; lactose, 10; bile salts, 1.5; sodium chloride, 5; agar, 13.5; neutral red, 0.03; crystal violet, 0.001