Fowl Typhoid and Fowl Cholera 
61 
Spleen.—Microscopic examination of an enlarged spleen shows it con- 
fnation° r ^ b \ 0 ° d ’ SiVing “ a dark red a PP eara nce on gross exam¬ 
ination. There also may be present hyperplasia which further accounts for 
e eniarged condition. In reference to typhoid in humans, Mallory describes 
proliferation ot endothelial cells, especially in the blood vessels and pulp 
spaces, and the formation of venus thrombi. This finding corresponds very 
closely with the microscopic findings in the spleen of a bird dying from avian 
FIG. 25.—SUGGILLATION OF MUCOSA OF SMALL INTESTINE 
Kidneys.—The kidneys are the seat of active congestion caused by the 
ng n oZ CU «V h * iS diSeaSe ' Degenerative Ganges, such as cloudy sweil- 
F^ure 27 s r ,‘ r. and ar6aS of f ° CaI are found. In 
gure 27 is shown a photomicrograph showing active congestion (A) • cloudv 
weihng (B), m which the cells are swollen occluding the lumen of the 
ubules. C shows two of the tubes in which the cells are leaving their base 
Lungs.—!n some cases broncho-pneumonia is present. There is extra¬ 
vasation of serum into the alveoli due to injury of the capillaries by the toxin 
Fieure 0 28 show b ° dy . fl . ulds . by the infectin S organism. Congestion is present. 
tin* 7 a? 8 h i a photomicro g ra P h under low magnification showing conges¬ 
tion (A) and some serous effusion (B). 
