134 



PARASITES OF THE DOMESTIC ANIMALS 



Cytoleichus nudus. 



as the disease is readily conveyed from the back of one hen to another 

 in treading. 



Family V. Cytoleichid.e 



Acarina (p. 94). — This family contains two genera, Cytoleichus and 

 Laminosioptes, each with one species causing a deep-seated acariasis in 

 birds. 



Cytoleichidie (p. 134). — The body is rounded, 

 almost bald, and whitish in color. The 

 mouth parts are conical. The legs have five 

 articles and are strong and elongated; all 

 terminate by a simple stalked sucker. The 

 ovigerous female is 500 to 600 microns long 

 bj' 350 to 400 microns broad. She may pro- 

 duce either larvae or eggs. 



Colonies of these parasites live in the air 

 passages and air sacs of fowl. 



Laminosioptes cysticola. Cytoleichidae 

 (p. 134). — The bod}^ is twice as long as 

 broad; color grayish. On the dorsal surface 

 are several pairs of bristles, a long pair ex- 

 tending from the posterior extremitJ^ The 

 mouth parts and the two first pairs of legs 

 are carried upon the anterior third of the 

 body which is separated from the posterior 

 portion bj^ a transverse furrow. The legs 

 are short, smooth, and provided with 

 suckers, which are not permanent upon the 

 anterior pair. The ovigerous female is 250 

 to 260 microns long by 100 to 110 microns 

 broad. 



Parasitic in subcutaneous connective tis- 

 sue of fowl. 



The Cj'toleichus species enter the respir- 

 atory passages and pass to the deeper air 

 channels, even to the air canals in the bones. 

 From their relatively large size and whitish 

 color they may be readily seen with the naked eye, usually in colonies 

 of more or less numlDcr. Ordinarily these parasites do not cause suf- 

 ficient disturbance to betray their presence during the life of their host. 

 If in exceptionally large numbers they may cause attacks of coughing 

 by irritation of the bronchial mucosa. 



Lammosioptes cysticola lives in the subcutaneous connective tissue, 

 especially in regions where tliis is loose, as the neck, breast, sides, and 



Fig. 75.— Foot of fowl affected 

 with scaly leg. 



