124 Veterinary Medicine. 



Symptoms. Equine influenza is liable to show a special pre- 

 dilection for a given set of organs in different epizootics, so that 

 we find descriptions of the different forms as independent types or 

 even separate diseases: as the catarrhal form, thoracic form, 

 abdominal form, bilious form, 7tervous form, pink eye, infectious 

 cellulitis, and rheumatic influenza. These forms may, however, 

 appear in different subjects in the same epizootic, and when they 

 are not due to complications, may be looked on as a concentra- 

 tion of the morbid processes on one class of organs rather than 

 another. 



Initial pathognomonic symptoms. Certain prominent and strik- 

 ing symptoms are so constantly present in the earlier part of the 

 disease that they may be held as virtually diagnostic. These are 

 the suddenness of attack, the anorexia, the profound early 

 prostration and weakness, the high temperature, the swelling and 

 Miatering of the eyes, and the specially brownish red coloration of 

 the conjunctiva and other visible mucosce. The attack may come 

 on with almost lightning rapidity. The animal which yesterday, 

 or it may be but an hour or two ago, appeared to be in the most 

 vigorous health and spirits, is found with pendant head, resting 

 perhaps on the manger, ears drooping, eyelids swollen and half 

 closed, epiphora, conjunctiva of a brownish red or violet, lips 

 loose and drooping, and one or two legs partially flexed, while 

 the body is balanced on the others. The patient is indisposed to 

 move, and when compelled to walk may sway and stagger from 

 nervous and muscular weakness. The arched back, cracking 

 limbs, and their stiff, rigid movement further indicate the suffering 

 in muscles or joints or both. Appetite is greatly impaired or lost, 

 thirst marked, and hyperthermia io2° to 105° or upward. Sneez- 

 ing, cough or symptoms of some other special localization may be 

 present, but the above occurring in a number of horses at once, 

 without appreciable climatic cause, when one or two new horses 

 have been very recently acquired, or when influenza has been 

 prevailing in the vicinity or in a neighboring place, will usually 

 stamp the nature of the attack. 



Cadeac considers the sudden attack, high fever, and profound 

 nervous prostration and stupor as the manifestations of the un- 

 complicated disease, while the localizations in the lungs, bronchia, 

 pleura, liver, bowels, etc., are indications of complications by 



