320 An Introduction to Medical Mycology 



the rash appeared hypertrophic, and considerable scarring was present. 

 The organism was demonstrated in scales removed for examination. This 

 fungus grossly resembles H. pedrosoi on artificial mediums, but it grows 

 more slowly, the surface is irregular and uneven, and the border is indented. 

 The culture mount shows H. compactum (still in comparison with H. 

 pedrosoi) to have coarser mycelium, thicker cell walls and more pigment. 

 Branching occurs at sharper angles, and there are several other points of 

 differentiation. The appearance under filtered ultraviolet rays is similar 

 to that noted for H. pedrosoi. 



BIBLIOGRAPHY 



Carrion, A. L.: Chromoblastomycosis : New clinical type caused by Hormodendrum com- 

 pactum, Puerto Rico J. Pub. Health & Trop. Med. 11:663, 1936. 



19. PHIALOPHORA VERRUCOSA 



This micro-organism is an infrequent cause of chromoblastomycosis. 

 In the United States it was first isolated from a patient in Boston in 1915, 

 and the only other cultivation was obtained from a patient in Texas. The 

 fungus has also been found in South America. 



(a) Clinical characteristics.— The lesions produced by this fungus 

 may be similar to those caused by H. pedrosoi. In Lane's case (Boston) 

 the lesions consisted of an ulcer and a nodule localized to a buttock. The 

 patient in Texas, however, exhibited an eruption similar to that usually 

 observed in South America. 



(b) Cultural characteristics.— The growth is greenish brown; it is 

 covered with a short nap and has a grayish border. 



(c) Culture mount.— This reveals typical flask-shaped conidiophores. 



(d) Filtered ultraviolet rays.— The appearance is similar to that noted 

 for H. pedrosoi. 



(e) Immune reactions.— Conant and Martin found complement-fixing 

 antibodies in the serums of rabbits immunized with a strain of P. verrucosa. 



BIBLIOGRAPHY 



Mkdi.au, E. M.: New fungus, Phialophora verrucosa, pathogenic for man, Mycologia 7:200, 

 1915. 



20. ACTINOMYCES BOVIS (HARTZ; WOLFF AND ISRAEL) 



The Actinomycetes at times resemble bacteria and at other times, molds, 

 and have been considered by some to be parent forms from which both 

 branches evolve. Their exact classification is still unsettled. 



