LOCOWEED DISEASE OF SHEEP 415 



ties of the head; bronchopneumonia and parasitic worms were also found. 

 A few typical autopsies are detailed below, and the others are summarized. 



Autopsy 16. Lamb No. 52, from Corral VI, May lamb of Van Cleve's flock, weight 

 18 pounds, length 28| inches from tip of nose to root of tail. Lamb had been in poor 

 condition for some time, suffering with cough, like the rest of the flock, frequently 

 digging its nose into the ground, and occasionally raising its head high in the air. 

 The animal was very weak, walked feebly, ran behind the rest of the bunch of sheep, 

 raising its legs, especially the hind legs, as if wading through water. On August 6 the 

 animal looked very ill, the cough and running from the eyes being very pronounced, 

 the face being swollen and the animal very weak. The lamb died on the evening of 

 August 7 and was autopsied at 9.30 a.m., August 8. 



Anatomical diagnosis. Acute bronchopneumonia right and left lungs, with 

 abscess formation, empyema, and bronchitis; acute intense inflammation of mucous 

 membranes of nasal passages and superior orbital sinuses; twenty to forty embryos 

 of Oestrus ovis crawling in sinuses, nares and trachea. Emaciation. Adhesions be- 

 tween omentum, ventral wall, intestines and stomach with cysts in the midst of the 

 adhesions containing caseous-purulent contents (Cysticercus tenuicollis?) ; openings 

 from the paunch into four of above-mentioned cysts. Sarcosporidiosis. Irregular in- 

 cisor teeth. 



The lamb was undersized with practically no subcutaneous fat, muscle reddish 

 brown, clear and translucent. Several lymph glands in the femoral region were found 

 large, red and soft; on section being much injected, and having dilated capillaries. 

 The abdominal wall was tightly adherent to the omentum by fibrous adhesions which 

 also bound the omentum to the paunch and intestines. In the adhesions were twenty 

 or thirty small cysts about 1 x J cm. with walls approximately 1 or 2 mm. thick. 

 These cysts were smooth on the inside but exteriorly were bound in fibrous tissue. 

 One cyst contained a formless mass of semi-caseous, yellow, purulent material. The 

 cysts were distributed on the under surface of the diaphragm, over the paunch, in 

 the loops of the gut and in the pelvis. The omentum and mesentery were devoid of 

 fat. Mesenteric and retroperitoneal lymph glands large and soft, the retroperi- 

 toneal lymph glands were numerous, varying in size from a pin's head to 3 mm. in 

 diameter. The intestines were clear throughout, the stomach contained a moderate 

 amount of soft food. In the first stomach opposite the transverse furrow were three 

 or four round openings 4 or 5 mm. in diameter extending through the stomach wall 

 and communicating directly with the cavity of the caseous cyst described above, 

 pressure upon the dysts forcing pus through the stomach openings. 



Spleen 10 x 6J x 2 cm., small, soft, no adhesions. On section very soft, structures 

 not visible. Liver of fair size, surface smooth. The gall bladder and bile ducts were 

 clear. "Kidneys; capsule stripped readily, leaving pale mottled surface with the cor- 

 tex averaging 11 mm. On section the kidney was gray, and cloudy, the glomeruU 

 were seen indistinctly, the striations easily visible. The pelvic organs and adrenals 

 were normal, the pancreas was soft and showed post-mortem changes. 



Thorax. The left lung was tightly bound by fibrous adhesions to the chest wall, 

 the apex and dorsal surface of the lung being free, the rest of it being bound to the 

 chest wall, to the pericardium and the diaphragm. In freeing the lung a cavity was 

 opened into in the lower left lobe and about 100 cc. of thick yellowish gray pus escaped. 

 The entire lung was consolidated except the apex and upper dorsal part of upper lobe. 



