APPENDIX 273 



graph 4 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. 



Paragraph 4. Hogs which require treatment as pro- 

 vided under (b) in paragraph 3 of this section shall be 

 treated and disinfected as follows: 



(a) Serum-alone method. The serum used shall have 

 been prepared and released for marketing at an estab- 

 lishment holding a license from the Secretary of Agri- 

 culture and the dose employed shall conform to that re- 

 quired in paragraph 1, section 6, or paragraph 3, sec- 

 tion 10 of Regulation 19. After receiving this treatment 

 they shall be disinfected by dipping in a 2 per cent 

 aqueous solution of cresol compound, U. S. P., or a per- 

 mitted substitute therefor, except when prevailing low 

 temperatures make it impracticable, and be held in non- 

 infectious pens for at least 3 hours before being loaded 

 for transportation. 



(6) Simultaneous-inoculation method. The serum 

 and virus used shall have been prepared at an establish- 

 ment holding a license from the Secretary of Agriculture 

 and the doses shall be not less than those required in 

 paragraph 1, section 6, or paragraph 3, section 10 of 

 Regulation 19. After receiving this treatment they shall 

 be held under the supervision of a bureau employee for 

 a period of at least 21 days, except when treated with 

 virus and serum released for marketing. If no symp- 

 toms of hog cholera or other infectious, contagious, or 

 communicable disease are exhibited by the animals, they 

 shall be disinfected by dipping in a 2 per cent aqueous 

 solution of cresol compound, U. S. P., or a permitted 

 substitute therefor, except when prevailing low tempera- 

 tures make it impracticable, and held in noninfectious 

 pens for a period of at least 3 hours before being loaded 

 for transportation. 



SECTION 10. Except as otherwise provided in these 



