198 PARASITES OP MAN 



was published. In that paper the following summary was 

 offered : 



1. Filaria Bancrofti is the sexually- mature state of certain 

 microscopic worms hitherto obtained either directly or indirectly 

 from human blood. 



2. The minute haematozoa in question hitherto described as 

 Wucherer's Filariae, Filaria sanguinis hominis, Trichina cystica, 

 Filariose dermathemaca, and so forth are frequently associated 

 with the presence of certain more or less well-marked diseases 

 of warm climates. 



3. The diseases .referred to include chyluria, intertropical 

 endemic hsematuria, varix, elephantiasis, lymph scrotum, and 

 lymphoid affections generally, a growth called helminthoma 

 elastica, a cutaneous disorder called craw-craw, and also leprosy. 



4. It is extremely probable that a large proportion, or at 

 least that certain varieties of these affections are due to morbid 

 changes exclusively resulting from the presence of Filaria 

 Bancrofti or its progeny within the human body. 



5. It is certain that the microscopic haematozoa may be 

 readily transferred to the stomach of blood- sucking insects, 

 and it has been further demonstrated that the digestive organs 

 of the mosquito form a suitable territory for the further growth 

 and metamorphosis of the larval Filariae. 



6. The character of the changes undergone by the micro- 

 scopic Filariae, and the ultimate form assumed by the larvae 

 whilst still within the body of the intermediate host (Culex 

 mosquito), are amply sufficient to establish the genetic relation- 

 ship as between the embryonal Filaria sanguinis hominis, the 

 stomachal Filariae of the mosquito, and the sexually-mature 

 Filaria Bancrofti. 



In the month of September, 1878, I received a letter from 

 Dr da Silva Lima announcing the fact that Dr Araujo had 

 verified the existence of the embryos of Filaria Bancrofti in 

 mosquitoes, at Bahia. These mosquitoes had, I understood, 

 attacked a French priest in whose blood Dr Araujo also 

 detected Filariae. Thus, it fell to the lot of Araujo, through 

 his untiring zeal, to verify in Brazil all the separate discoveries 

 of Bancroft, Manson, and Lewis. 



In the October issue of the f Pathological Society's Transac- 

 tions ' for 1878 Dr Bancroft records numerous cases of filarious 

 disease, and he gives a succinct account of the circumstances 

 connected with his original discovery. 



