Title 21
SECTION 558.300
558.300 Ivermectin.
§ 558.300 Ivermectin.(a) Specifications. Type A medicated article containing 2.72 grams ivermectin per pound (g/lb).
(b) Sponsor. See No. 000010 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.344 of this chapter.
(d) Special considerations. See § 500.25 of this chapter.
(e) Conditions of use in swine. It is used in feed as follows:
| Ivermectin in grams/ton |
Combination in grams/ton | Indications for use | Limitations | Sponsor |
|---|---|---|---|---|
| (1) 1.8 | Weaned, growing-finishing swine: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae); lice (Haematopinus suis); and mange mites (Sarcoptes scabiei var. suis) | Feed as the only feed for 7 consecutive days to provide 0.1 milligrams per kilograms (mg/kg) of body weight per day. Withdraw 5 days before slaughter | 000010 | |
| (2) 1.8 | Bacitracin methylenedisalicylate, 10 to 30 | Weaned, growing-finishing swine: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae); lice (Haematopinus suis); and mange mites (Sarcoptes scabieivar. suis); and for increased rate of weight gain and improved feed efficiency | Feed as the only feed for 7 consecutive days to provide 0.1 mg/kg of body weight per day. Withdraw 5 days before slaughter | 000010 |
| (3) 1.8 | Bacitracin methylenedisalicylate, 250 | Weaned, growing-finishing swine: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae); lice (Haematopinus suis); and mange mites (Sarcoptes scabiei var. suis); and for control of swine dysentery associated with Treponema hyodysenteriae on premises with a history of swine dysentery, but where symptoms have not yet occurred, or following an approved treatment of disease condition | Feed as the only feed for 7 consecutive days to provide 0.1 mg/kg of body weight per day. Withdraw 5 days before slaughter | 000010 |
| (4) 1.8 to 11.8 | Adult and breeding swine: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae, and prevention of transmission of infective larvae to piglets, via the colostrum or milk, when fed during gestation); lice (Haematopinus suis); and mange mites (Sarcoptes scabiei var. suis) | Feed as the only feed for 7 consecutive days to provide 0.1 mg/kg of body weight per day. Withdraw 5 days before slaughter | 000010 | |
| (5) 1.8 to 11.8 | Bacitracin methylenedisalicylate, 250 | Pregnant sows: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae, and prevention of transmission of infective larvae to piglets, via the colostrum or milk, when fed during gestation); lice (Haematopinus suis); and mange mites (Sarcoptes scabiei var. suis); and for control of clostridial enteritis caused by Clostridium perfringens in suckling piglets | Feed as the only feed for 7 consecutive days to provide 0.1 mg/kg of body weight per day. Withdraw 5 days before slaughter. Feed bacitracin methylenedisalicylate Type C medicated feed to sows from 14 days before through 21 days after farrowing on premises with a history of clostridial scours | 000010 |
| (6) 18.2 to 120 | Adult and breeding swine: For treatment and control of gastrointestinal roundworms (Ascaris suum, adults and fourth-stage larvae; Ascarops strongylina, adults; Hyostrongylus rubidus, adults and fourth-stage larvae; Oesophagostomum spp., adults and fourth-stage larvae); kidneyworms (Stephanurus dentatus, adults and fourth-stage larvae); lungworms (Metastrongylus spp., adults); threadworms (Strongyloides ransomi, adults and somatic larvae, and prevention of transmission of infective larvae to piglets, via the colostrum or milk, when fed during gestation); lice (Haematopinus suis); and mange mites (Sarcoptes scabiei var. suis) | Top dress on daily ration for individual treatment for 7 consecutive days to provide 0.1 mg/kg of body weight per day. Withdraw 5 days before slaughter | 000010 |