Dystocia and stillbirth in beef cattle with subclinical hypomagnesemia: a case study

E. Sosa; E. Miqueo; M. Mejía; E. Fernández; M. Fernández Tovo; M. Cruz; L. M. Campero; D. P. Moore; E. Morrell; G. J. Cantón

doi:10.30972/vet.3618089

Autores

E. Sosa Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET) https://orcid.org/0000-0003-2239-5966
E. Miqueo Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET). Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias https://orcid.org/0000-0003-1205-9192
M. Mejía Private practitioner
E. Fernández Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET)
M. Fernández Tovo Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET)
M. Cruz Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET)
L. M. Campero Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET) https://orcid.org/0000-0002-5566-079X
D. P. Moore Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET). Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias https://orcid.org/0000-0001-6735-3810
E. Morrell Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET) https://orcid.org/0000-0002-3978-5728
G. J. Cantón Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS INTA Balcarce-CONICET) https://orcid.org/0000-0003-3494-8193

DOI:

https://doi.org/10.30972/vet.3618089

Palavras-chave:

languid calving, perinatal deaths, mineral deficiencies, mineral supplementation

Resumo

We describe the occurrence of dystocia and stillbirths in Brangus and Aberdeen Angus cows and heifers within the context of mineral deficiencies in a beef farm located in Buenos Aires province, Argentina. Water, forage, and blood samples were collected for chemical, serology, and mineral quantification, respectively. Birth weight, sex and presentation of calves were monitored at birth, and calving ease was evaluated. A stillborn Aberdeen Angus female was examined postmortem. The occurrence of dystocia and subsequent stillbirths was recorded in 6.11% (32 out of 523) of dams with subclinical hypomagnesemia. During calving, dystocic animals exhibited prolonged labor, stillbirths, and delivery assistance. No difference in birth weight was registered between dystocic and eutocic births. A postmortem examination of a stillborn calf revealed low hepatic copper concentrations and congenital Neospora caninum infection. However, no histopathological findings consistent with N. caninum infection were observed, confirming only the congenital infection. Maternal hematological analyses indicated suboptimal levels of calcium, magnesium, and copper. Mineral supplementation with MgCl2 + MgO reduced the likelihood of dystocic calvings in cows. Additionally, non-infectious causes of perinatal deaths were serologically identified in the dams. Dietary analysis showed no mineral-interfering factors. While dystocia is common, its association with mineral deficiencies is likely underreported. Further research is needed to better understand and mitigate the negative impact of mineral deficiencies on the sustainability of beef production systems in the region.

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