OCULAR INFECTIONS 327 



In a gonorrhceal ophthalmia the secretion is much more abundant and there is 

 an absence of contaminating organisms, the reverse of infection with the confusing 

 M. catarrhalis. As a matter of fact, large numbers of M. catarrhalis may be present 

 in the conjunctival secretion with only slight irritation being observable. 



In keratomycosis the cause has been ascribed to Aspergillus fumigatus. 



Certain fungi of the genus Microsporum have been thought to be the cause of 

 trachoma, as have also certain bacillary forms. One should be very conservative 

 about reporting fungi in smears or cultures of external surfaces. 



The larval stage of Taenia solium (Cysticercus cellulosae) has a predilection for 

 eye as well as brain. It is usually situated beneath the retina. 



The question as to the nature of the so-called ophthalmic flukes is taken up under 

 trematodes. Echinococcus cysts have been reported in the orbit. 



The adult Filaria loa tends at times to appear under the conjunctiva or in the 

 subcutaneous tissue of the eye-lids. 



Fly larvae have been reported from the conjunctival sacs in the helpless sick. 



Demodex may cause an obstinate blepharitis. 



Prowazek has thought that certain fine dots within the cytoplasm of epithelial 

 cells, which stain best by Giemsa's method and which he considered protozoal in 

 nature, were the cause of trachoma. 



