Sample Submittal Form                      The Microbiological Testing Professionals                    800-282-7102
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Microbial Limit Preparatory Testing (USP)


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USP requires preparatory testing to validate the test method that will be used in routine microbial limit testing of the product.

The Microbial limit test demonstrates that the product does not inhibit the microorganisms that may be present. Diluted samples of the material are inoculated with separate, diluted cultures of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa ,Salmonella,Candida and Aspergillus. By means of a challenge of 6 representative microorganisms, preparatory testing demonstrates the ability of the test method to recover microorganisms that could be present on a product.

Microbial limit validation test is required only once per product unless the product formula or manufacturing process has gone thru a modification. Turn around time for this test is 7-8 days. 

* USP Microbial Limit Test
This test is designed to determine total aerobic microbial count and yeast and mold count. This test demonstrates that the product is free of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa , Salmonella , C.albicans and A.niger. This test takes 7-8 days.
For USP microbial limits testing call 800-282-7102 or email info@accugenlabs.com.

* Microbial Limit Confirmatory Test
To confirm the presence or absence of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa , Salmonella ,C.albicans and Aspergillus niger, microbial identification is performed..It can be tests like coagulase test and oxidase tests or complete microbial identification. Microbial Identification is completed in 2-4 days.


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Last Updated On: 4-17-11
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