Which medium is used for primary recovery of fungi?

Which medium is used for primary recovery of fungi?

• A. BHI Agar w/out & with antibiotics
• B. Chromogenic agar
• C. Dermatophyte test medium
• D. Inhibitory mold agar

Answer: (A)

Primary recovery of fungi aims to grow any fungal organisms from clinical samples without being overwhelmed by bacteria or other flora. Brain heart infusion agar is a rich, nonselective medium that can support a wide range of fungal species, making it a good choice for initial isolation. Using one plate without antibiotics allows the natural interactions and potential resistant strains to reveal themselves, while a parallel plate with antibiotics suppresses bacterial growth that would otherwise obscure fungal colonies. Together, these two approaches maximize recovery: the antibiotic-containing plate reduces contamination and crowding, whereas the antibiotic-free plate ensures fungi that might be affected by antibiotic components can still grow and be identified. Other media mentioned are more specialized—some target only dermatophytes, others are designed for quick yeast identification or for inhibiting certain organisms—so they’re less suitable for broad primary recovery. Thus, BHI agar with and without antibiotics best supports the initial, broad recovery of fungal pathogens.

Primary recovery of fungi aims to grow any fungal organisms from clinical samples without being overwhelmed by bacteria or other flora. Brain heart infusion agar is a rich, nonselective medium that can support a wide range of fungal species, making it a good choice for initial isolation. Using one plate without antibiotics allows the natural interactions and potential resistant strains to reveal themselves, while a parallel plate with antibiotics suppresses bacterial growth that would otherwise obscure fungal colonies. Together, these two approaches maximize recovery: the antibiotic-containing plate reduces contamination and crowding, whereas the antibiotic-free plate ensures fungi that might be affected by antibiotic components can still grow and be identified. Other media mentioned are more specialized—some target only dermatophytes, others are designed for quick yeast identification or for inhibiting certain organisms—so they’re less suitable for broad primary recovery. Thus, BHI agar with and without antibiotics best supports the initial, broad recovery of fungal pathogens.