The Effect of Tannin-Containing Peanut Skin Supplementation on Drug-resistant Haemonchus contortus Control in Meat Goat

This study was to determine whether the phytochemical CT-containing peanut skin would have effects on animal performance and drug-resistant Haemonchus contortus control in meat goats or not. Twenty two Kiko-crossbreed intact male goats (Capra hircus) were randomly assigned to three treatments (n = 6): 1) control (no-peanut skin), 2) 25 % peanut skin and 3) 50% peanut skin (PS). The total mixed ration (TMR) associated with peanut skin was applied included soybean meal, alfalfa pellet, ground corn, vitamins and minerals mix. Animals were confined indoors for a period of 50 days. Animals were dewormed on day -10 and all the goats were artificially inoculated on day 0 with 5000 infective stage (L3) drug-resistant H. contortus larvae. Dry matter intake (DMI) and average daily gain (ADG) were monitored. Blood samples were taken at the end of the experiment. Fecal egg counts (FEC) and FAMACH scores were determined approximately every 2 week. All analyses were conducted using a GLM procedure of SAS with linear and quadratic effects. The results indicated that animals on 25% peanut skin tended to be grow 31% faster ADG (quadratic; P=0.10) when compared to control or 50% PS supplementation group. Average DMI were similar among treatments (P>0.05), but there were treatment by time of day interactions (P<0.01). Goats receiving PS supplementation had linearly decreased (P<0.05) FEC, with maximum responses in 25% PS supplementation. Blood plasma metabolites were not different among treatments, but Ca (P<0.01), Cl (P=0.08), urea-N (P=0.07), and Alkaline phosphatase (P=0.09) tended to be higher or were higher for the PS diet than for control. Results from the current study indicated that animals consuming PS supplementation has the potential to improve ADG and might have the ability to reduce FEC at the moderate level of CT-containing PS supplementation (up to 25%).