ANOMALIES AND DISEASES OP YOUNG PIGS 225 



because of the adhesion of the lids. In the latter stages there will 

 be bulging of the facial bones which interferes with respiration and 

 is usually associated with a peculiar blowing noise. 



The length of diiration of this disease is variable. In those cases 

 in which there is apparently a marked toxemia due to the absorption 

 of the bacterial products the course is relatively shorter than in 

 those cases in which the disease is localized in the mucosa of the 

 nasal chambers. Swine that have been affected with infectious rhinitis 

 for more than one year have been observed but such cases are the 

 exception. 



Diagnosis. — Infectious rhinitis is frequently confounded with 

 necrotic stomatitis. Necrotic stomatitis is characterized by an intense 

 inflammation involving the buccal mucosa, in which the inflamed 

 membranes pass through the successive changes of congestion, tume- 

 faction, necrosis and erosion, and the affected tissue has a peculiar 

 disagreeable pungent odor. The lesions of infectious rhinitis are 

 without odor and the progress of this disease is much less rapid than 

 stomatits. Infectious rhinitis is differentiated from catarrhal rhinitis 

 because of its infectious nature and is differentiated from infectious 

 catarrhal rhinitis by the fact that the bones are not involved in the 

 latter. 



Treatment. — Clean pens, properly ventilated hog houses, changing 

 of the quarters for swine every year or every second year and proper 

 selection of breeding stock will be found of value in the prevention 

 of infectious rhinitis. When the disease is observed in the very early 

 stages, medication by inhalation of such agents as oil of eucalyptus 

 may be of value, providing the patients can be confined in prac- 

 tically air-tight houses. It may be possible when the specific cause 

 has been demonstrated beyond a reasonable doubt that a biologic 

 agent may be found that will immunize swine against this disease. 

 Cases in which there is bulging of the facial bones are practically 

 hopeless and should be destroyed. 



STOMATITIS IN SUCKLINGS (SOBE MOUTH IN PIGs) 



The various and usual types of stomatitis, according to pathologic 

 classification, have been described in the chapter on the digestive 

 system and stomatitis due to the B. necrophorus is described under 

 the heading of necrobacillosis but stomatitis occurring in suckling 

 pigs is of such importance that a special discussion is justifiable. 



Stomatitis is suckling pigs is very common and is directly, or 



