Diagnostic Method

Thayer-Martin (VPN) Media: VPN Represents?

Thayer-Martin (VPN) media is a special type of agar used to isolate Neisseria species. What does VPN stand for anyways? Mnemonic is V – Very P – Popular N – Neisseria V – Vancomycin (inhibits gram-positive organisms) P – Polymyxin (inhibits gram-negative organisms excluding Neisseria species) N – Nystatin (inhibits fungi)

‘Factor V’ in ‘Chocolate Agar’ is Used to Culture?

‘Factor V’ in ‘Chocolate Agar’ is Used to Culture?

‘Chocolate Agar’ is a special type of media used to culture H. influenza since the organism requires ‘Factor V’ to grow. For your reference, ‘Factor V’ is NAD+ (Nicotinamide Adenine Dinucleotide). If you live in North America, you will probably know Kellogg’s cereal called ‘Vector’. It’s tasty and rich in fiber but also quite expensive […]