Causes: infection, toxins, fermented food, traumas, crowding, cold.
Symptoms: stiff loins and quarters, frequent micturition, urine limpid
or red. Treatment.
Renal congestion in pigs has been seen mainly as the result of toxin
poisoning in swine erysipelas, hog cholera or caseous pneumonia. It is
also liable to occur from putrid or overfermented food, and in fat,
heavy animals from injuries sustained in shipping by rail by trampling
on or squeezing each other. Kicks and other injuries may at times
contribute to its occurrence. Exposure to cold storms, to which swine
are especially sensitive, a wet, cold bed, or a leaky roof, are
additional causes.
The _symptoms_ are more or less stiffness of the loins and hind parts,
frequent urination, the secretion being often passed in excess, and
though at times clear yet at others pink or bloody and precipitating
blood clots or at least containing blood globules.
_Treatment_ is mainly prophylactic. If therapeutic measures are
desirable for valuable animals, they should follow the same lines as for
sheep: rest, fomentations, aqueous food, anodynes, weak alkaline
diuretics, laxatives, and balsams.