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  • Bacillus cereus
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Bacillus cereus
Bacillus cereus Bacillus cereus
Bacillus cereus grown on BA in a day at 30 ° C. B. cereus are facultative anaerobic, i.e. it grows both aerobically and anaerobically but best aerobically.
 A phase contrast microscope image of Bacillus cereus. Refractive spores are seen, located centrally or para centrally.
© Department of Veterinary Disease Biology 2011
Faculty of Health and Medical Sciences - University of Copenhagen
Denmark
Bacillus cereus - Plate Count Agar
Bacillus cereus Bacillus cereus Bacillus cereus
10-5 10-6 10-7
Click the images to enlarge

There is prepared a dilution series of Bacillus cereus plated in PCA and incubated aerobically at 25° C for three days. B. cereus is facultative anaerobic but grows best aerobically. Colonies of B. cereus, which grow on the surface, is slightly beige-colored and clear lobed. Colonies the center of the agar are smaller, slightly beige-colored and less lobed. Colonies, which grow between the petri dish and the agar, are more bluish translucent.
© Department of Veterinary Disease Biology 2011
Faculty of Health and Medical Sciences - University of Copenhagen
Denmark
Bacillus cereus - Plate Count Agar closeup
Bacillus cereus Bacillus cereus
10-5 10-7
There are big lobed opaque colonies on the surface, small opaque colonies in the center of the agar and a little more transparent colonies situated between the petri dish bottom and agar.
© Department of Veterinary Disease Biology 2011
Faculty of Health and Medical Sciences - University of Copenhagen
Denmark