NIH Agar - for sterility testing and for cultivation and maintance of isolates from sterility testing of biological products.

100gm

500gm

NIH Thioglycollate Broth - see Alternative Thioglycollat Medium.

100gm
500gm

NYC Agar Base - recommended for selective isolation of Gonococci.

Neomycin, Erythromycin Assay Agar - see Antibiotic Assay Medium No.11.

100gm

500gm

Neutral Red Chalk Lactose Agar - for detection of lactic Streptococci in milk and milk products.

Neutralising Buffer - for detection of microorganisms on dairy and food equipment disinfected with chlorine or quaternary ammonium compounds.

Neutralising Fluid - for neutralising the activity of antimicrobial agents as per B.P.

*Niacin Assay Medium - for microbiological assay of Niacin (Nicotinic acid) or Niacinamide using Lactobacillus plantarum ATCC 8014 as a test organism.

Nickerson Medium - see Bi.G.G.Y. Agar.

Nitrate Agar - for detection of nitrate reducing bacteria.