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Chapter XXX 



FILARIA 



The Filaritdae form one of the families into 

 which the Nematodes are divided. Other families 

 in this sub-order are the Ascaridae, Strongylidae, 

 Angiiillulidae, etc. The Filariidae are divided into 

 several genera, only one of which concerns us 

 immediately, viz., the Filaria, and first, we shall 

 consider those species of filaria which have their 

 embryos in human blood. They are the following : 



I. F.hancrofti, syn, F. nocturna (Mk^^so^). 

 F. diurna. 

 F. Persians. 

 F. ozzardi. 

 F. demarquai. 

 F. loa. 



F. megalhaesi (adults). 

 F. gigas (Prout). 



The following are the characters of the em- 

 bryos of each species : — 



F. hancrojti. — -Occurs at night in the peri- 

 pheral blood, found in the internal organs by day, 

 especially in the vessels of the lungs. Ce. argyro- 

 tarsis and Ce. albtpes are efficient hosts. 



I. Length about three hundred m fresh (one 

 hundred and eighty m> stained specimens) by seven 

 to eleven /m- wide. 



