296 



DISEASES DUE TO HELMINTHS 



It seems to have a restricted geographical range. 

 Europeans are often infected. 



CAUSATIVE PARASITE. 



That a filaria has occurred in the eye has been known for four 

 centuries. The Loa loa has been found in the ocular and palpebral 

 conjunctivae, crossing the bridge of the nose, under the skin over the 

 sterno-mastoid, scalp, fingers, penis, &c. 



Loa loa : the anterior end of the male, 

 magnified. (After R. Blanchard.) 



Loa loa : anterior portion of the female 

 as far as vulva. (After Looss). 



'''^:4'i^-'' '' 



Loa loam ^\\.\x. Natural size. (Afler 

 Fiilleborn and Rodenwaldt.) 



Loa loa : male on the left, female on 

 the right. X 2. (After Looss.) 



It has rarely been found in the anterior chamber of the eye. 



MORPHOLOGY. 



The male is a thin, white, semi-transparent worm, 25 to 34 mm. 

 long by o'4 mm. thick, tapering at each extremity with a head like a 

 truncated cone, and the tail incurved with a rounded tip. 



It has transverse corrugations of the cuticle with a wavy outline, 

 wide apart in the females and close in the males. 



