288 HOG CHOLERA 



5. When the serum-treated test pigs develop during 

 the test period symptoms of any infectious, contagious, 

 or communicable disease (other than hog cholera) which 

 is not caused by the serum used. 



6. When a condition obtains in any of the test pigs 

 which is not otherwise covered in this section. 



Rule B. A serum test shall be declared "unsatisfac- 

 tory and the serum contaminated" when the following 

 condition obtains: 



1. When during the test period any of the serum- 

 treated test pigs develop symptoms of any infectious, 

 contagious, or communicable disease (other than hog 

 cholera) which is due to the serum used. 



Rule C. A serum test shall be declared "Unsatisfac- 

 tory ' ' when any one of the following conditions obtains : 



1. When both of the control pigs react as described in 

 rule D of this paragraph and one of the serum-treated 

 pigs becomes visibly sick subsequent to the fourth day 

 after the time of inoculation and is found not to have 

 fully recovered before the test animals are released by a 

 veterinary inspector, as provided in paragraph 5, section 

 4, of this regulation. 



2. When both of the control pigs react as described in 

 rule D and two or more of the serum-treated pigs be- 

 come visibly sick after the fourth day after the time of 

 inoculation. 



3. When an abscess, which is not definitely known to 

 be due to a cause other than the serum used, develops at 

 the site of the serum inoculations in any of the serum- 

 treated pigs. 



Rule D. A serum test shall be declared "Satisfac- 

 tory" when the following conditions obtain: 



1. When both of the control pigs exhibit visible symp- 

 toms of hog cholera at some time during the test period, 

 one of which becomes visibly sick of this disease subse- 

 quent to the fourth day of this period but within seven 



