MOLD DISEASES 



53 



the center, though continuing to spread at the edge, thus 

 producing a ringlike growth that has given origin to the 



Fig. 28. A mold {^Trichophyton) which produces ringworm. At a 

 is a bit of hair with the mold spores on the outside, and at <^ a 

 figure" of the mold itself highly magnified. 



name. The affection is a 

 troublesome one to heal, 

 especially when it gets into 

 the scalp ; but it never pro- 

 duces any very serious 

 trouble. Two or three types 

 of this disease have been 

 found to be produced by 

 two or three kinds of molds. 

 Fig. 28 shows one of the 

 common species that is the 

 cause of ringworm. At a 

 is shown a bit of hair with 

 the mold fungus and mold 

 spores growing upon it, and 

 at b the fungus more highly 

 magnified. Of the several 

 this trouble some are more 



Fig. 29. Two pieces of hair from the 

 scalp infested with a mold {Microspo- 

 ron) producing ringworm. The upper 

 figure shows the masses of spores 

 attached to the outside of the hair ; 

 the lower figure shows the mold 

 thread lying beneath the spores. 



species of molds that produce 

 liable to grow upon the hair 



