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Effects of garlic supplementation on nematode parasite infection in grazing goats

Z. Wang, A. L. Goetsch, G. Detweiler, S. P. Hart, and T. Sahlu

Journal of Animal Science 88(E-Supplement 2):580-581. 2010

Feeding garlic to goats infected with Haemonchus contortus reduced fecal worm-egg count (FEC) in a 4-wk indoor trial (J. Anim. Sci. 87(E-Suppl. 2):T354, 2009). The study reported here investigated effects of garlic supplementation of lactating meat goat does on infection with nematode parasites, mainly H. contortus, in summer grazing conditions. Forty multiparous Boer does (2 to 5 yr of age), naturally infected with nematode parasites, and their single- or twin-kids (1 to 4 mo old initially) were used in an 84-d experiment. Five does with their kids were allocated to each of 8 0.4-ha mixed grass-forb pastures. Treatments were control and garlic, with 4 pastures per treatment. The control group received 80 g/d of a 25% molasses and 75% corn mixture per doe. The garlic group received 20 g/d of garlic powder plus 80 g/d of the molasses-corn mixture per doe. A loose mineral-vitamin supplement was available free-choice. Initial mean FEC was 448/g (range of 0 to 1,450/g) for the control and 500/g (range of 0 to 2,450/g) for the garlic treatment (SEM = 119; P > 0.05). Forty-two days after the experiment started, the garlic treatment resulted in a lower (P < 0.06) FEC compared with the control (2,837/g for garlic and 6,105/g for control, respectively; SEM = 927), and some goats in the control group had to be treated with the anthelmintic (LevasoleŽ, Schering-Plough Animal Health Corp, Union, NJ). Thereafter, the FEC of the garlic treatment remained steady and tended to be lower compared with the control (1,739, 1,689, and 1,303/g for garlic and 1,532, 2,340, and 1,967/g for control at d 56, 70, and 84, respectively; SEM = 280, 517, and 340, respectively). The BW of goats was not affected by garlic supplementation (P > 0.05). These data suggest that supplementing lactating meat goats with garlic can lessen the level of nematode parasitism.


 

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