ROTI®Plaque90 MacCon

Sterile ready-to-use culture media plates for microbiological analysis.

ROTI^®Plate90 are prepared culture media plates with a diameter of 90 mm. They are thus adapted to the size of membrane filters for assaying of low-germ fluids by membrane filtration method. They are also applicable for the microbiological analysis of samples in general.

The germs of expected low-germ liquid samples are concentrated by membrane filtration. Afterwards, the membrane is placed on top of the medium and incubated. Using a membrane with a grid helps counting the resulting colonies.
Our products are tested and approved exclusively for research and development.

Samples which are expected to have a higher microbiological burden are prepared in a serial dilution. Afterwards, every dilution step is plated and incubated. The number of grown colonies is noted as result.

MacConkey agar is used for the subcultivation of Gram-negative enterobacterial colonies and for the determination of Escherichia coli.

Bile salts and crystal violet are the selective agents and inhibit Gram-positive bacteria.
Neutral red is the pH indicator that, when lactose is fermented and the pH drops, shows a colour change from neutral red to pink.