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Help in preservative efficacy test


I'm a new lab analyst ( microbiology ) working with presrvative efficay test ,, I did the test several times but everytime I do the test the bacteria die in the product,, the growth is zero ,,, control has positive growth , can anyone help ? thank you

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Sid Kemp (SidKemp) says

4 years ago
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loud-silence says

4 years ago
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