DISEASES OF SWINE AND OTHER ANIMALS. 



77 



cons membr;me ou tlio great ciirvaturo is congested, and bears several xiatches of deep, 

 blood-red extravasatiou. 



tSmall iirtcstinc-i: Red and congested throughout. The contents are smalliu quantity 

 and dry, being collected in dry masses at considerable intervals, and partly frothy. 

 The duodenum and first half of the jejunum contains twenty-two ascaridcs (A. Suilla), 

 one extending to 11 inches in length. At different iioints tho bowel is completely 

 blocked by tho rolls of these worms. 



Lavfje intestine: llio-caical valve normal. Caecum and colon, like tho small intestine, 

 congested throughout nearly its whole extent, with patches of extravasatiou and ero- 

 sion at intervals, but none of tho characteristic sloughs nor ulcers, with thick indu- 

 rated base. Tho ciecum and upper portion of the colon contains thirteen whip-Avorms 

 {tricoeephalus crenalus), their heads lirmly imbedded in the mucous membrane, and 

 requiring considerable force to withdraw them. 



Liver: Small and of healthy aspect. Gall-bladder full of a dark-green, tenacious 

 bile. Spleen small, black, and somewhat soft. Pancreas normal. Mesenteric glands 

 apparently little altered. Some Avere slightly congested. 



Kidneys : Normal. In the prepuso is a slight, fetid, concretion-liko false membrane. 



On the omentum are two hjidaiids. 



Itesjjiratori) organs : The whole interior of the larynx is of a dull brownish-red, ex- 

 cepting where covered by an extensive false membrane. Along the upper wall of the, 

 wiudpii)e, where the euils of the cartilages overlay), is a false membrane about a third 

 of an inch iu breadth, and extending from the larynx as far as tho lungs. This has a 

 hrm consistency, and a dirty yellowish-white color, tinged with green, and stands out 

 prominently from tho adjacent mucous membrane by an abrupt margin on each side. 

 Under tho microscope it is seen to consist of large quantities of granular matter, gran- 

 ule cells, epithelial and pus corpuscles, blood globules, and numerous crystals. It also 

 contains eggs of tho lung-worm beneath this morbid product. 



Lunffs : Whole anterior lobe of the right lung carnilied, of a deep-red color, and smks 

 in water. The special bronchus for this lobe, and its divisions, are tilled with a tena- 

 cious mucus, but contain no worms. Several lobulettes iu the anterior lobe of tho 

 left lung are iu a similar condition. On the posterior border of each lung several lob- 

 ulettes aro consohdated, being of a dirty-gray color and semi-transparent. They jire- 

 sent, in short, tho appearance of pulmonary cedema. Tho bronchia leading to these 

 lobulettes are comiiletely tiUed with a thick mucus and numerous worms {strongylus 

 elonyatus) and their eggs. 



Tho bronchial li/mphatiG glands appear normal. 



Blood : The blood is very black, coagulates slowly but firmly, and without buli'y 

 coat, and has its globules fiiU-sized and rounded. The right side of the heart beat, 

 wheu touched, for nearly five hours after the death of the animal, aiul of its removal 

 from the body. 



EXPKKIMENT No. 3. 



White pig, eight weeks old; no special breed. Has been fed on raiv offal at a slaughter-house. 



