[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR558.155]

[Page 395-396]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 558--NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS--Table of Contents
 
      Subpart B--Specific New Animal Drugs for Use in Animal Feeds
 
Sec.  558.155  Chlortetracycline, sulfathiazole, penicillin.

    (a) Approvals. Type A medicated articles: (1) 20 grams of 
chlortetracycline hydrochloride, 4.4 percent (20 grams) sulfathiazole, 
and procaine penicillin equivalent to 10 grams of penicillin per pound 
to No. 046573 in Sec.  510.600(c) of this chapter.
    (2) 40 grams of chlortetracycline hydrochloride, 8.8 percent (40 
grams) sulfathiazole and procaine penicillin equivalent in activity to 
20 grams of penicillin per pound to No. 046573 in Sec.  510.600(c) of 
this chapter.
    (b) Specifications. (1) The antibiotic substance refers to the 
antibiotic or feed-grade antibiotic.
    (2) The antibiotic activities are expressed in terms of the 
appropriate antibiotic standards.
    (c) Related tolerances. See Sec. Sec.  556.150, 556.510, and 556.690 
of this chapter.
    (d) Conditions of use. It is used for swine as follows:
    (1) Amount per ton. Chlortetracycline, 100 grams plus penicillin, 50 
grams plus sulfathiazole, 100 grams.
    (2) Indications for use. For reduction of incidence of cervical 
abscesses. Treatment of bacterial enteritis (salmonellosis or necrotic 
enteritis caused by Salmonella choleraesuis and vibrionic dysentery). 
Maintenance of weight gains in the presence of atrophic rhinitis. Swine 
10 pounds of body weight to 6 weeks post-weaning: Increased rate of 
weight gain and improved feed efficiency. Swine 6 to 16 weeks post-
weaning: Increased rate of weight gain.
    (3) Limitations. For swine raised in confinement (dry-lot) or on 
limited pasture. Feed as sole ration. Withdraw 7 days prior to 
slaughter.

[[Page 396]]



      Minimum Amount of Type C Feed Which the Animal Should Consume
------------------------------------------------------------------------
                                                                Minimum
                                                 Approximate    desired
                  Type of feed                   body weight  daily feed
                                                  in pounds    intake in
                                                                pounds
------------------------------------------------------------------------
Prestarter (up to 6 weeks postweaning).........           20           1
Starter (up to 6 weeks postweaning)............           50      1\1/2\
Grower (6-16 weeks postweaning)................           80           2
Finisher (6-16 weeks postweaning)..............          150           3
------------------------------------------------------------------------


[40 FR 13959, Mar. 27, 1975, as amended at 51 FR 7397, Mar. 3, 1986; 51 
FR 28547, Aug. 8, 1986; 52 FR 2684, Jan. 26, 1987; 61 FR 2415, Jan. 26, 
1996; 62 FR 35077, June 30, 1997; 62 FR 67725, Dec. 30, 1997; 63 FR 
11599, Mar. 10, 1998; 66 FR 46706, Sept. 7, 2001; 67 FR 21171, Apr. 30, 
2002]