M00000431
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ISO 4833-1 1st Edition, September 1, 2013 Microbiology of the food chain - Horizontal method for the enumeration of microorganisms - Part 1: Colony count at 30 °C by the pour plate technique
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 4833 specifies a horizontal method for
enumeration of microorganisms that are able to grow and form
colonies in a solid medium after aerobic incubation at 30 °C. The
method is applicable to:
a) products intended for human consumption and for animal
feed;
b) environmental samples in the area of food and feed production
and handling.
This part of ISO 4833 is applicable to:
1) products that require a reliable count when a low limit of
detection is specified (below 102/g or 102/ml
for liquid samples or below 103/g for solid
samples);
2) products expected to contain spreading colonies that obscure
colonies of other organisms, e.g. milk and milk products likely to
contain spreading Bacillus spp.
The applicability of this part of ISO 4833 to the examination of
certain fermented food and animal feeds is limited and other media
or incubation conditions can be more appropriate. However, this
method can be applied to such products even though it is possible
that the predominant microorganisms in those products are not
detected effectively.
For some matrices, the method specified in this part of ISO 4833
can give different results to those obtained using the method
specified in ISO 4833-2.