If there is no microbial colony found on settle plate ,observed count will be written as zero or nil or <1?
Why we can not write zero?
0 mean no chance to occur
Nil mean probabiliy present
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?
Yes,but how many count will be considered for result?
7 cfu are allowed in class B
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.
yes you r right
Dear Sajjad 7cfu are allowed or 5Cfu? please