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 scabiei var. 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 [72 FR 37437, July 10, 2007, as amended at 81 FR 17609, Mar. 30, 2016; 81 FR 95005, Dec. 27, 2016; 84 FR 12499, Apr. 2, 2019; 84 FR 39185, Aug. 9, 2019]