DYM-109C requires supplement, either YI-110C or YMY-110Y depending on the matrix. This chlortetracycline supplement along with the chloramphenicol already present in the vial inhibits any bacteria present in the sample.
NF-OSB requires tartaric acid as a supplement to decrease the pH of the vial to 4 if required.
SM-118 requires a supplement - inhibits Bacillus – Neogen code #SI-118B.
PD-109 requires a supplement – inhibits Gram positive bacteria – Neogen code #S2-PSI
DLA-109 requires an antibacterial (vancomycin) or antifungal (amphotericin B or cycloheximide) supplement..
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