Patent ID: 8357498

Claim:
A microorganism culture device, comprising: a porous matrix layer having a basis weight of 40 to 100 g/m 2 ; air permeability of 7 to 24 cm/sec; at least one sub-layer of a multilayered water-soluble polymer laminated with the matrix layer; and at least one type of material selected from the group consisting of a nutrient for microorganism growth, a coloring agent, and a selective agent, wherein letters are assigned to the sub-layers of the water-soluble polymer layer in alphabetical order beginning with the sub-layer nearest the porous matrix layer, the water-soluble layer comprising two sub-layers, layer A and layer B, wherein layer A comprises a water-soluble polymer and layer B comprises a water-soluble polymer; and wherein the at least one type of material selected from the group consisting of a nutrient for microorganism growth, a coloring agent, and a selective agent is contained in layer A, layer B, or in layer A and layer B.