144 



l•(»^I.^K^ 1)ISi:asi-;s ami riii:iK tkkatment. 



•JS 



tion of balsam ol' I'ciu in alcoht)! ( i ])art dI halsani lo 3 of alco- 

 hol) ur I (Irani of crroHii. J ouiict's of glycerine, J-j ounce of 

 alcohol anil ' _. ounce of water. Either of these liquids are 

 applied bv rnbl)inj( into the skin. 'Phe application shoidd be 

 repeated every 4 or 3 days until llu disease is cured. 



Other Mitrs Affcctimj I'oultry. 



Another form of Body Mange or .scabies is found associated 

 with the mites Hpidcrmoptcs bilobatiis and Hpidcnnoptcs hifiir- 

 catiis, but it has not Ijeen certainly tlemonstratcd that they are 

 the cause of the disease. Present evidence iuflicates tliat they 

 are. 



The disease closely resembles favus (p. 147) but usually does 

 not affect the head. The regions commonly attacked are the 

 neck, breast, the wings and the body under the wings. It some- 

 times affects the entire body, including the head. The skin be- 

 comes irritated and shows an accumulation of 

 scales or crusts especially at the base of the 

 feathers. 



The mites live on the skin at the base of the 

 featliers. Since the mites are sometimes found 

 on birds which show- no signs of scabies and since 

 the di.'^ease so closely resembles favus, which is 

 known to be caused by a fungus, it is .sometimes 

 supposed that this mange is al.so due to a fungus 

 and that the mites are inoffensive. 



Five .species of mites have been recorded 

 which live upon the feathers of fowls. These 

 are fairlv abundant but do no harm. 



Two mites live within the body of fowls. One 

 of these, the air sac mite, is described elsewhere 

 (p. 1 10) . The other the connective tissue mite, 

 ticola. Con- Syniplcctopfcs cysticola. is found in the con- 

 nective tissue iiective tissue of the fowls. They produce local 

 mite, (''^"er j;,.j.;^^j.jj^j.|j, giving rise to tubercles but apparently 



do not affect the health of the bird. 

 The larvae of the so-called "harvest-bug" (which is not a bug 

 at all) Tctranychus (Thrombidinm) (Leptns) antumnalis some- 

 times attacks poultry. The appearance of this mite is shown in 



\ 



Fig- i> -'^'yip 

 tectoptcs c y s 



fig- 



36. 



