Symptoins. 



433 



tumor is liot, painful and in the later stages shows on palpation 

 a harder nnclens (Fig-. 66). 



The constantly increasing swelling forces the orbit up- 

 wards and backwards while the corresponding wing of the 

 palate is arched against the oral cavity and later is entirely 

 destroyed, so that the cavity appears to be surrounded only 

 by mucous membrane or by a dense pseudo-membrane. This 

 produces a marked dis- 

 figurement of the head 

 wdiile the movements of 

 the head or beak arc 

 greatly interfered with by 

 the tumor. On incision tlie 

 growth discharges a yel- 

 lowish-white, cheesy or 

 caseated mass, or dry and 

 brittle lumps may be re- 

 moved from its cavity. 



When the eyes are in- 

 volved the first indications 

 are acute catarrhal symp- 

 toms of the conjunctiva 

 with edematous, swollen, 

 painful lids beneath which 

 there accumulates much 

 muco-purulent exudate 

 filled with air bubbles, 

 sealing the eyes over night. If the eye slit is not opened at reg- 

 ular intervals the exudate dries, forming thick, yellowish-white, 

 caseated masses, which cause a protrusion of the fids and force 

 the eye backwards, forming on the surface of the cornea club- 

 shaped formations whose dry brownish-yellow ends project be- 

 tween the compressed lids. These masses are easily removed 

 from the conjunctival sac, but form again rapidly. In other cases 

 diphtheritic membranes develop on the conjunctiva ; the inflam- 

 mation may also extend to the conjunctival sclera and from here 

 to the cornea, which becomes opaque or ulcerated, and finally 

 a general inflammation of the internal eye results. 



Involvement of the intestinal tract occurs only in the later 

 stages of the disease and is manifested by profuse diarrhea 

 with frequent discharge of creamy or flui'd feces, sometimes 

 mixed with pus or blood, and causing a rapid Aveakening of the 

 animal. 



The general condition of the patients is at first not dis- 

 turbed, but later the condition changes markedly. Unable to 

 eat and gasping for air they sit around tired and depressed, 

 with neck drawn in, wings hanging down, feathers ruffled, and 

 do not resist attempts to catch them. The body temperature 

 is raised only in the late stages, while towards the end it falls 

 below normal. The comb and wattles are at first bluish-red 



Fig. 66. 



Swelling of the cclla infraorbitalis in 

 chicken pox. 



