VMC 311: Systematic Veterinary Bacteriology and Mycology (2+1)

DEMONSTRATION OF ASPERGILLUS

• Microscopically the hyphae are septate. The fungus is characterized by the presence of numerous conidiophores.
• Each conidiophore expands into a large vesicle at the end called columella, which is covered by finger-like structures known as sterigmata.
• Each sterigmatum bears a chain of spherical conidia. The morphology can be examined undisturbed by placing the slant under low power of microscope or by making slide preparations.
• Culturally the colonies of A.fumigatus develop rapidly on solid media as white filamentous growth, which increases in size up to 2-3 cm and becomes green or dark green in colour.