A. flavus

A. flavus may refer to:
 * Aspergillus flavus, a fungus species
 * Altererythrobacter flavus a bacterial species from the genus of Altererythrobacter
 * Agromyces flavus a bacterial species from the genus of Agromyces
 * Arthrobacter flavus a bacterial species from the genus of Arthrobacter
 * Awaous flavus a fish species found in South America