Abstract
Low doses of lactoferrin supplementation in weaning calves
Highlights
Mortality and morbility due to enteric diseases in calves is cause of financial losses for farmers, and is one of the most common reason leading to the administration of antibiotic therapies in pre-weaned calves
Colostrum containing at least 50 mg/mL of immunoglobulin G (IgG) was fed to the respective calf while a good quality colostrum previously stored was administered in the other cases
The prevalence of diarrhea was only numerically different between groups with values of 18.9% in the LF group and 27.3% in the C group. Such pathological events generated an average of 0.72 days of treatment/calf in the LF group and 1.09 days of treatment/calf in the C group during the pre-weaning period
Summary
Mortality and morbility due to enteric diseases in calves is cause of financial losses for farmers, and is one of the most common reason leading to the administration of antibiotic therapies in pre-weaned calves. The incidence rate of diarrhoea in calves up to 30-d of age ranged from 10 to 20% (Svensson et al, 2003) The latter is a multifactorial disease dependent either on infective and viral agents, which cause severe intestinal lesions, alterations in enzyme activity and nutrient transport mechanism, or a combination of these effects. This disease is favored by specific environmental conditions, farm management, nutrition and immune status (Cho & Yoon, 2014; Cardoso et al, 2020). The nutritional composition of the colostrum together with its content of immunoglobulins (Ig), maternal leucocytes, growth factors, hormones and
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