Abstract

OLMOS, Leandro H. et al. Effects of protein supplementation on dairy goats naturally infected with gastrointestinal nematodes in Valle de Lerma, province of Salta, Argentina. RIA. Rev. investig. agropecu. [online]. 2023, vol.49, n.1, pp.3-9. ISSN 1669-2314.

This work aimed to evaluate the effects of protein and copper supplementation in dairy goats naturally infected with gastrointestinal nematodes (GIN) in Valle de Lerma, province of Salta, Argentina. Three groups of 10 animals each were tested: GSP (group supplemented with 19% protein and copper administered subcutaneously at a rate of 0.5 ml per 20 kg of weight at the beginning of the trial), GSPD (group supplemented with protein and copper as GSP and dewormed monthly with Derquantel + Abamectin), and CG (control group, without supplementation or deworming). The animals were monitored every 15 days from the beginning of March 2021 until kidding, at the end of July 2021. The animals were clinically examined and Famacha and body condition were determined. In addition, hematocrit and serum protein were detected and coprological analyses were performed to confirm EPG and nematode prevalence. After kidding, daily milk production of each animal was measured up to 90 days of lactation. The prevalent GIN genera were Haemonchus and Trichostrongylus. At parturition, CG differed significantly in the average GIN egg count from GSP and GSPD, with 4035 (±4873.8) for CG, 1225 (±1173.5) for GSP and 983 (±1854.8) for the GSPD. Regarding physiological parameters, the hematocrit was 27.7% (±4.4) in CG, 31.7% (±5.1) in GSP, and 32% (±3.5) in GSPD; total serum proteins were 4 g/dl (±0.62) in CG, 5.8 g/dl (±0.69) in GSP and 6.2 g/dl (±0.61) in GSPD. Milk production in the treated groups (GSPD: 167.7l ± 18.2 l; GSP: 153.3 ± 18.2 l ) was higher than in CG (85.7 ± 19.2 l). Protein supplementation had a positive effect on parasitological, physiological, and productive parameters. Under the conditions of this trial, it would be advisable to supplement the animals 45 days before kidding to enhance GIN control and milk production.

Keywords : nematodos gastrointestinales; caprino; proteína; suplementación; productividad.

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