Colonies (SDA) are flat with a suede-like texture and are white in colour with a pinkish tinge. Some cultures show radial folding. An orange-pink “strawberry-coloured” reverse pigment is usually present. Macroconidia when present are usually five- to six-celled, thin to thick-walled, slightly echinulate, cylindrical to clavate with narrow base and blunt tip, 15-60 x 6-10 µm. Microconidia are ovoidal to pyriform in shape. RG-2 organism.
Chicken infection and culture of Microsporum gallinae.
Macroconidia of M. gallinae.
Key Features: macroconidial morphology, culture characteristics and clinical lesions in chickens.
A zoophilic fungus causing fowl favus in chickens and other fowl, affecting the comb and wattles producing "white comb" lesions. A rare cause of tinea in human. Invaded hairs show a sparse ectothrix infection but do not fluoresce under Wood's ultra-violet light.
Rebell, G., and D. Taplin. 1970. The Dermatophytes. 2nd. revised edition. University of Miami Press, Coral Gables, Florida. USA.
Rippon, J.W. 1988. Medical Mycology. 3rd Edition. W.B. Saunders Co., Philadelphia, USA.