Microbial count

manojsingh · October 24, 2018, 5:55pm

If there is no microbial colony found on settle plate ,observed count will be written as zero or nil or <1?

Sajjad_Ahmad · October 24, 2018, 5:56pm

Nill…

manojsingh · October 24, 2018, 5:57pm

Why we can not write zero?

Sajjad_Ahmad · October 24, 2018, 5:59pm

0 mean no chance to occur
Nil mean probabiliy present

manojsingh · October 24, 2018, 6:00pm

Good answer

Sajjad_Ahmad · October 24, 2018, 6:02pm

Thanks

manojsingh · October 24, 2018, 6:06pm

Suppose 4 settle plates are exposed in B grade area. 1st plate contain 1 colony,2nd contain 1 colony,3rd contain 2 colony 4th contain 1 colony .What will be result? Area is pass or fail?

Sajjad_Ahmad · October 24, 2018, 6:19pm

pass…

manojsingh · October 25, 2018, 1:12am

Yes,but how many count will be considered for result?

Sajjad_Ahmad · October 25, 2018, 2:53am

7 cfu are allowed in class B

manojsingh · October 25, 2018, 11:52am

in above example, total 5 colony found in 4 plate. so average count will be 1.25.Area is pass. maximum 5 count is acceptable in grade b as per EU GMP 2008.

Sajjad_Ahmad · October 26, 2018, 7:17pm

yes you r right

abidaali0308 · October 30, 2018, 6:34am

Dear Sajjad 7cfu are allowed or 5Cfu? please

Sajjad_Ahmad · October 30, 2018, 8:09am

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