Filaria loa 33 



rUaria siibcoiijiiiicth'alis Guyon 1864 of Braun 1902. 



This term is not used by Guyou himself 

 either in this paper or elsewhere so far as 

 I can ascertain. 



Filaria loa Guyot of Leuckart 1876:619. 



of Davaine 1877 xvii, +839. 

 of Cobbold 1879:205. 

 of Blanchard 1886. 

 of Stossich 1897:21. 

 filaria loa Guyot 1778 of Railliet 1893. 

 of Braun 1895. 

 of Moniez 1896. 

 of Braun 1902. 

 Draciiiiciihis oculi Diesing 1860:697. 

 loa Cobbold 1864:388-89. 



GEOGRAPHICAL DISTRIBUTION 



The first six cases of Filaria loa recorded were all from the 

 West Indies and the adjacent coast of South America, while 

 among the first twenty-one cases listed twelve were from that 

 same region and only nine from Africa. In all of the cases from 

 the West Indies and South America the hosts were negroes with 

 the exception of the Creole child of case 6. 



As already noted, this case would seem to indicate the exist- 

 ence at that time (approximately 1795) in St. Domingo of an 

 endemic center for this parasite. But this is the only evidence 

 that Filaria loa has at any time gained a footing in the lands 

 into which it has been introduced. It is noteworthy that since 

 1845, the date of case 21 mentioned above, no one has recorded 

 the occurrence of this parasite in the West Indies or in South 

 America. Apparently its occurrence in that region stopped with 

 the cessation of the slave trade, for all of the cases noted were 

 in negroes, and in some cases it stands definitely recorded that 

 they had come from Africa. Thus the worm which Mitchell 

 saw in 1845 (case 21) had apparently been seen eight years 

 before, and the' host, a young negress, had come from Africa in 

 1834. The single exception, beyond case 6 already discussed, 



303 



