Using FAMACHA and alternative dewormers to manage gastrointestinal nematodes in a dairy goat herd
S. P. Hart and L. J. DawsonJournal of Animal Science 88(E-Supplement 2):580. 2010
Gastrointestinal nematodes (GIN) are the greatest health problem in goat production. FAMACHA eye color scores have been developed for selective treatment of animals to reduce the rate of development of anthelmintic resistance. Alternative anthelmintics generally are only moderately effective (40-60% fecal egg count reduction; FECR), which may not be adequate for use with FAMACHA. The purpose of this study was to test the use of alternative anthelmintics in a FAMACHA program. Does were FAMACHA scored on May 25 and does with scores of 3 or greater were dewormed with levamisole HCl at 12 mg/kg BW (L). Lactating Alpine dairy goats (n = 91) were FAMACHA scored at 2 wk intervals from June 10 to October 15. Does with FAMACHA scores of 4 were administered one of three alternative anthelmintics and those with FAMACHA score of 5 were treated with L. Animals that were administered an anthelmintic were also given an oral supplement of iron, copper and vitamin B12. Fecal samples were taken for fecal egg counts (FEC) and blood samples were taken for packed cell volume (PCV) and serum total protein (TP). The three alternative anthelmintics were: 1) 2.0 g of copper oxide wires in a gelatin capsule (W), 2) 2.0 mL of a 4% solution of copper sulfate per 4.5 kg of BW as an oral drench (S), and 3) 4.0 g of cayenne pepper in a gelatin capsule (P). At least three animals in each period that had FAMACHA score of 3 were used as controls. FECR was low and not significantly different (P > 0.10) among anthelmintics (35, 52, 3, 1, and -11% for L, W, P, S, and C, respectively). FAMACHA score was improved (P < 0.05; except for treatment P) by administering an anthelmintic (-0.48, -0.41, -0.16, -0.37, and +0.67, for L, W, P, S, and C, respectively). TP was improved (P < 0.01) by administering an anthelmintic (0.45, 0.10, 0.08, 1.20, and -.96 for L, W, P, S, and C respectively). PCV was improved (P < 0.05) by administering an anthelmintic (-1.2, 1.0, 0.3, 1.6, and -2.4% for L, W, P, S, and C, respectively. Most anthelmintics improved physiological values above the control, but W appeared superior to other alternative anthelmintics and comparable to L and would be the alternative anthelmintic of choice to use with a FAMACHA program.
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