Compact Dry X-BC


Compact Dry is a simple and safe procedure for quantifying microorganisms in foodstuffs, cosmetics and other raw materials, including pharmaceuticals. The ready-to-use Compact Dry chromogenic plates are suitable for both in-process and final product controls.

Bacillus cereus is a Gram-positive, aerobic, spore-forming bacterium that generally thrives in soil, vegetables and various raw and processed food products. Spores of Bacillus can survive adverse conditions and germinate if conditions improve, a characteristic that makes their complete elimination difficult. Studies have shown that when the bacterial population of B. cereus reaches more than 10 cells/g, toxins are produced, which can be emetic or diarrheal enterotoxins to which acute attacks of nausea and vomiting are attributed, with abdominal pain and diarrhea, respectively. With this, B cereus is considered a release parameter for cooked meats and vegetables, boiled and fried rice, vanilla sauce, custards, soups and raw vegetable sprouts.

Matrix: Raw materials, finished products, environmental samples from the food, cosmetics and pharmaceutical industries, among others.
Incubation time and temperature: Incubate at 35 ± 2 °C for 24 ± 2 hours per manufacturer's recommendation, with NordVal 30 ± 1 °C for 48 ± 2 hours and with MicroVal 30 °C for 48 hours.
Presentation: Packs of 4 units
Mode of use:
  1. Uncover the cover.
  2. Deposit 1 ml of the sample in the center of the surface of the Compact Dry plate.
  3. The sample is automatically and homogeneously dispersed on the film, and transforms the dry film into a gel in a few seconds.
  4. Replace the cover on the plate. Incubate for the prescribed time.
Weigh the sample
Add the diluent
Homogenize the sample
Removing the plates
Remove the cover
Add 1 Ml of sample
Wait for the sample to be absorbed
Put the plate down
Bring the plate in incubation
Perform reading
Interpretation of results:

Bacillus cereus forms green/blue colonies because of the chromogenic content in the medium. However, some other bacteria, which are not Bacllus cereuscan also grow and form white colonies on this plate. Only green/blue colonies should be counted.

Storage and shelf life:

Keep at room temperature, from 1 to 30 °C. Shelf life 18 months.