US 4,565,783 A · Dry culture media

Abstract

A device for culturing microorganisms is described comprising a body member comprising a self-supporting, water-proof substrate; a layer of adhesive coated on the substrate, the adhesive being non-inhibitory to the growth of microorganisms; and a cold-water-soluble powder adhered uniformly to the surface of the adhesive, the powder comprising a gelling agent and/or nutrients for growing microorganisms. Another device is described comprising a body member comprising a self-supporting, water-proof substrate; a coating coated directly on the substrate, the coating being substantially water-free and consisting essentially of a cold-water-reconstitutable material comprising a gelling agent and/or nutrients for growing microorganisms; and a cover sheet releasably adhered to the bottom member, the cover sheet being substantially impermeable to bacteria and water vapor. The devices are activated by the addition of water or an aqueous test sample.

Claims33

Dependent claims

A device for growing microorganisms, comprising:

a body member comprising a self-supporting, waterproof substrate having upper and lower surfaces;
a layer of adhesive-coated on said upper surface of said substrate, said adhesive being non-inhibitory to the growth of microorganisms;
and a cold-water-soluble powder adhered uniformly to said adhesive, said powder comprising at least one ingredient selected from the group consisting of a gelling agent, one or more nutrients for growing microorganisms, and a mixture thereof;
said device being free of matrixes which adversely affect visualization and isolation of bacterial colonies.

1 more element

A device for growing microorganisms, comprising:

a bottom member comprising a self-supporting water-proof substrate having upper and lower surfaces with a coating adhered to at least a portion of said upper surface, said coating being substantially water-free and consisting essentially of a cold-water-reconstitutable material comprising at least one ingredient selected from the group consisting of a gelling agent, one or more nutrients for growing microorganisms, and a mixture thereof;
and a cover sheet releasably adhered to at least a portion of said bottom member and capable of substantially overlying said coating on said substrate, said cover sheet being substantially impermeable to bacteria and water vapor and having a coating adhered to at least a portion of the surface of said cover sheet facing said body member, said coating being substantially water-free and consisting essentially of a water-reconstitutable material comprising at least one ingredient selected from the group consisting of a gelling agent, one or more nutrients for growing microorganisms, and a mixture thereof;
said device being free of matrixes which adversely affect visualization and isolation of bacterial colonies.

Dependencies are inferred from the claim text.

Dry culture media

Life of this patent

Dry culture media

Life of this patent

Abstract

Claims33