English M P, Tucker W D
Mycopathologia. 1978 Jul 28;63(2):113-20. doi: 10.1007/BF00441257.
Four atypical isolates of Microsporum canis, three from humans and one from a cat, were obtained from North-West London. These and a further human isolate were compared with each other and with a typical isolate of the fungus. Immediately after isolation the atypical isolates were very labile, but were stabilised after a few subcultures from selected sectors. The stable forms differed from each other, but all had a tendency to brown rather than yellow pigmentation, to feathery submerged mycelium and to abnormal macroconidia. The macroscopic appearance and texture of the colonies depended on the density, orientation and branching pattern of the submerged mycelium. In recent years similar brown, feathery forms of M. canis have been reported from monkeys but not from cats. It is suggested that all such isolates may be culturally stable forms of a very unstable strains, probably feline in origin, which has yet to be described.
从伦敦西北部获得了四株犬小孢子菌的非典型分离株，其中三株来自人类，一株来自一只猫。将这些分离株与另一株人类分离株以及该真菌的典型分离株进行了相互比较。分离后，这些非典型分离株非常不稳定，但从选定区域进行几次传代培养后就稳定下来了。稳定后的形态彼此不同，但都倾向于产生褐色而非黄色色素，有絮状的气生菌丝以及异常的大分生孢子。菌落的宏观外观和质地取决于气生菌丝的密度、方向和分支模式。近年来，从猴子身上报道过类似的褐色、絮状的犬小孢子菌形态，但未在猫身上发现过。有人认为，所有这些分离株可能是一种非常不稳定菌株在培养上的稳定形态，该菌株可能起源于猫，目前尚未被描述。
