A diabetic patient presents with pus from the eye. Colonies of isolated organisms are grey-white with a microscopic feature of non-septate hyphae and obtuse branching. Diagnosis is

Mucor, Rhizopus, lichthemia are associated with mucormycosis. Primary infection is usually in upper respiratory tract or nose spreading the infection to orbit, paranasal sinuses, brain. On microscopy, specimen shows non-septate hyphae. In SDA medium the colonies are grey-white with a thick cotton fluffy surface. Ref: Baveja textbook of microbiology; 4th edition