302 HOG CHOLEEA 



cholera virus, surviving controls from tests of anti-hog- 

 cholera serum, and surviving hogs which have been used 

 for testing hog-cholera virus may be removed from the 

 premises of the establishment not sooner than 15 days 

 subsequent to the day of inoculation and exposure, pro- 

 vided they are healthy. It is required, however, that all 

 such hogs b'efore their removal from the premises be 

 given the serum-alone treatment as prescribed under 

 (a) of paragraph 4 of this section, or the simultaneous 

 treatment prescribed under (&) of the same paragraph 

 and section. Hyperimmune hogs and pigs used for test- 

 ing the purity and potency of anti-hog-cholera serum 

 may be removed from the premises of licensed establish- 

 ments 21 days subsequent to the day of hyperimmuniza- 

 tion or inoculation, provided they exhibit no symptoms 

 of any infectious, contagious, or communicable disease, 

 and provided further that they are first disinfected as 

 prescribed in paragraph 5 of this section. Other hogs 

 shall be removed from the premises of the establishment 

 only after treatment and disinfection as provided in 

 paragraph 5 of this section, except that such hogs need 

 not be held 21 days when treated with serum and virus 

 which have been released for marketing. 



SECTION 9. Paragraph 4 (a). Serum-alone method. 

 The serum used shall have been prepared and released 

 for marketing at an establishment holding a license from 

 the Secretary of Agriculture and the dose employed 

 shall conform to that required in paragraph 1, section 6, 

 or paragraph 3, section 10, of Regulation 19. After 

 receiving this treatment they shall be disinfected as pre- 

 scribed in paragraph 5 of this section. 



SECTION 9. Paragraph 4 (&). Simultaneous-inocula- 

 tion method. The serum and virus used shall have been 

 prepared at an establishment holding a license from the 

 Secretary of Agriculture and the doses shall be not less 

 than those required in paragraph 1, section 6, or para- 



