Apr. 8, 1918 



Sources of Hog-Cholera Infection 



121 



Table IX. — Record of recovered pig 8pj 



On October 6, when this hog had entirely recovered, it was thoroughly 

 scrubbed, first with soap and water, and next with compound cresol 

 solution, and again with soap and water. The pig was then transferred 

 to a clean, disinfected pen, and a susceptible pig. No. 1029, was placed 

 in the same pen. The two pigs w-ere in close association from October 6 

 to 26, a period of 20 days, during which time the susceptible pig remained 

 perfectly well. Pig 1029 was injected with virus on October 27 to 

 test its susceptibility and died on November 4, eight days later, with 

 well-marked hemorrhagic lesions. 



In order to determine whether pig 893 harbored the virus of hog 

 cholera in its blood, this animal was bled from the tail on October 6 and 

 5 c. c. of the defibrinated blood was injected into pig 1031. Pig 1031 was 

 kept under careful observation from October 6 to 27, a period of three 

 weeks, and remained perfectly normal. Pig 1031 was injected with 

 5 c. c. of virus on October 27 to test its susceptibility. It contracted 

 cholera and was killed for virus eight days later, the autopsy revealing 

 well-marked hemorrhagic lesions and beginning ulceration of the cecum. 



Experiment XI. — Pig 951 was injected with virus on August 29, was 

 off-feed on the fifth day, and developed a marked temperature reaction 

 and conjunctivitis, but made a good recovery. The clinical record of 

 this pig following the virus injection is given in Table X. 



