INFECTIOUS PSEUDO-RHEUMATISM IN ADULTS. 



101 



by difficulty in rising, and soon afterwards by lameness, or by the animal 

 failing to place weight on one of the hind limbs. The affected joint, 

 usually one of the articulations of the stifle, appears markedly enlarged, 

 is not appreciably hot to the touch, but reveals a certain amount of 



Fig. 54. — The femoro-tibial joint in a case of 

 infectious rheumatism. All the articular sur- 

 faces of one side have undergone change (the 

 condyle of the femur, interarticular cartilage, 

 and the upper extremity of the femur). 



FiCx. 55. ~ 

 joint. 



Normal femoro-tibial 



painful sensibility on pressure. The periarticular tissues are infiltrated 

 and the synovial sacs slightly distended. 



After a few days, a week or two at most, the periarticular swelling 

 diminishes, and the condition appears to remain stationary. 



Appetite is normal or only diminished. The pain continues, and 

 causes progressive wasting and diminution in the yield of milk. 



If at this time the practitioner makes a careful digital examination of 

 the diseased region, he may find one of two conditions. In the first, the 



