Effect of gastrointestinal nematodes on serum copper and phosphorus of growing beef calves in northwestern Argentina

Authors
Suarez, Victor Humberto; Micheloud, Juan Francisco; Araoz, Virginia; Martinez, Gabriela Marcela; Rosa, Diana Esther; Mattioli, Guillermo Alberto
Publication Year
2018
Language
English
Format
article
Status
Published version
Description
The aim of this work was to study the effect of gastrointestinal nematodes (GINs) on copper (Cu) and phosphorus (P) in blood of beef cattle in two ranches (R1 and R2) located in northwestern Argentina. In 2015–2016 (R1) and 2016–2017 (R2), in each ranch, 22 weaned female calves were divided into two groups: calves treated systematically with 200 mcg/kg moxidectin every 45–50 days (TG) and untreated calves (UTG). The following parameters were measured: number of fecal eggs (epg), fecal cultures, serum Cu and P levels, and live weight gain (LWG). Differences between groups were compared using analysis of variance and Tukey test. GIN infections in both ranches were subclinical and moderate, showing the highest epg (R1 = 907 ± 754; R2 = 1049 ± 1040) by mid-winter. Epg values of TG groups were always negligible (> 93% of moxidectin efficacy). The dominant nematode genera were Cooperia and Haemonchus. The average serum Cu values (μg/dl) indicated low (R1 = 49.7 ± 18) and severe (R2 = 27.2 ± 14) deficiency. The effect of treatments was evident in both ranches from late winter, with TG showing significantly (p < 0.01) higher serum levels in winter, spring, and early autumn (R1 = 65.1, 50.9, and 60.3; R2 = 48.0, 25.7, and 22.4) than UTG (R1 = 44.3, 33.9, and 32.9; R2 = 25.5, 18.2, and 16.4). There were no differences in serum P levels between groups. LWG of TG increased significantly (p < 0.008) (27.2% in R1 and 38.6% in R2), with respect to those of UTG. This study showed a negative effect of GIN on serum Cu values in moderately infected growing calves.
Instituto de Investigación Animal Chaco Semiarido
Fil: Suarez, Victor Humberto. INTA. Instituto de Investigación Animal Chaco Semiarido. Grupo de Patología, Epidemiología e Investigación Diagnóstica-Área de Sanidad Animal; Argentina
Fil: Micheloud, Juan Francisco. INTA. Instituto de Investigación Animal Chaco Semiarido. Grupo de Patología, Epidemiología e Investigación Diagnóstica-Área de Sanidad Animal; Argentina. Universidad Católica de Salta. Facultad de Ciencias Veterinarias. Cátedra de Patología General y Especial; Argentina. INTA. Estación Experimental Agropecuaria Salta; Argentina
Fil: Araoz, Virginia. Instituto Nacional de Investigación Agropecuaria. La Estanzuela; Uruguay
Fil: Rosa, Diana Esther. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Laboratorio de Nutrición Mineral; Argentina
Fil: Mattioli, Guillermo Alberto. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Laboratorio de Nutrición Mineral; Argentina
Source
Tropical animal health and production 51 (3) : 613–618 (March 2019)
Subject
Ternero
Enfermedades Gastrointestinales
Cobre
Fósforo
Calves
Gastrointestinal Diseases
Copper
Phosphorus
Gastrointestinal Nematode
Serum Copper
Serum Phosphorus
Nematodos Gastrointestinales
Suero de Cobre
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/3682