﻿ILLUSTRATIONS 



Plate I 



Fig. 1. Section of liver from a pig infested with kidney worms. 



a, markedly congested lobule in the dependent portion of a lobe. 

 6, a worm tract in the interstitial tissue. 



c, an accumulation of worm tracts. 



d, a marked development of interstitial tissue from the chronic 



productive inflammation which has practically replaced the 

 parenchymatous tissue. 



2. A section of liver from a pig infested with kidney worms and v/hich 



shows thrombus formation. 

 a, hepatic vein. 

 h, a parietal thrombus measuring 1.9 centimeters in length and 



filling approximately half of the vessel. 



c, worm tracts in the immediate vicinity of the vessel wall which 



are surrounded by connective tissue. 



d, worm tracts deep in the liver substance, replacing the paren- 



chymatous tissue with fibrous connective tissue. 



3. Kidney of a pig infested with kidney worms. 



a, large retention cyst. 



b, scars on the surface of the kidney. 



c, the mottled appearance over the surface of the kidney. 



4. Transection of a kidney from a pig infested with kidney worms. 



o, cortical portion of kidney, presenting perforations undoubtedly 

 caused by post-mortem changes. 



b, medullary portion of kidney presenting the same porous appear- 



ance. 



c, kidney worms coiled up in the pelvis of the kidney. 



d, a kidney worm penetrating the medullary portion of the kidney. 



e, an accumulation of worm tracts in the pelvis of the kidney. 



/, worm tracts extending into the medullary portion of the kidney. 



Plate II 



Fig. 1. Microphotograph of the liver from a pig infested with kidney 

 worms. 



a, haemorrhagic areas around the hepatic vein, showing marked 



passive congestion. 



b, interstitial tissue somewhat thickened. 



2. Microphotograph of the kidney, from a pig infested with kidney 

 worms. 



a, casts present in the convoluting and collecting tubules. 



b, formation of casts in the tubules. 



c, the breaking up of the parenchymatous cells and the extrusion 



of colloid material into the lumen of the tubules in the forma- 

 tion of casts. 



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