This International Standard specifies a horizontal method for the enumeration of viable presumptive Bacillus
cereus by means of the colony-count technique at 30 °C. It is applicable to
products intended for human consumption and the feeding of animals, and
environmental samples in the area of food production and food handling.
NOTE In order to have a practicable test method, the confirmatory stage has been restricted to the typical aspect on
MYP agar and the haemolysis test. Thus the term ¿presumptive¿ has been introduced in order to acknowledge the fact that
the confirmatory stage does not enable the distinction of B. cereus from other closely related but less commonly
encountered Bacillus species, such as B. anthracis, B. thuringiensis, B. weihenstephanensis, B. mycoides. An additional
motility test may help to differentiate B. cereus from B. anthracis in cases where the presence of the latter is suspected.
Diese ÖNORM enthält eine allgemeine Anleitung zur Bestimmung vermehrungsfähiger Stämme von Bacillus cereus nach dem Koloniezählverfahren in Produkten, die für den menschlichen Verzehr oder als Futtermittel bestimmt sind.