Perfil metabólico de vacas Jersey clinicamente saudáveis

Alvarenga, Paula Batista de; Rezende, Amanda Lima; Justo, Felipe Benedetti; Rezende, Soraia Rage; Cesar, João; Santos, Ricarda Maria dos; Mundim, Antônio Vicente; Saut, João Paulo Elsen

doi:10.1590/s0100-736x2017000200015

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…However, we do not believe this is the reason because the alteration occurred only in Experiment I. GGT and AST activity did not change between groups, a positive result demonstrating that the use of cracker residue does not cause liver damage in animals. Alvarenga et al [34] showed that AST activity oscillated between 73.05 and 102.41 U/L and GGT activity between 16.15 and 9.93 U/L for clinically healthy Jersey cows, similar to our work.…”

Section: Discussionsupporting

confidence: 91%

Use of Cracker Residue in the Diet of Dairy Heifers: Impacts on Animal Health, Ruminal Fatty Acids Profile, Digestibility, Weight Gain, and Economic Viability

Vitt,

Nascimento,

Brunetto

et al. 2024

Animals

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This study determined whether the isomeric or isoenergetic/isoproteic substitution of corn in the diet of Jersey heifers in the rearing phase with cracker residue would impair growth and health, as well as reducing production costs. Fourteen Jersey females in the growth phase were used, separated into two treatments with seven animals in each lot in collective pens. The experiment used 7-month-old animals (169.8 ± 2.89 kg) and lasted for four months. In Experiment I, the animals were divided into two groups: treatment, with the partial replacement of 40% corn with cracker residue, and control, in which the animals consumed the same diet with 100% corn (isometric diet kg for kg). In Experiment II, the animals with a body weight of 200.2 ± 3.85 kg were divided into two groups: Treatment, replacing 100% of the corn with cracker residue, and control, in which the animals consumed an isoprotein and isoenergetic diet but with 100% of the corn in the formulation. The diet consisted of concentrate, Tifton 85 hay, and corn silage, supplied twice a day individually, with animals contained in their feeders by kennels. There was water ad libitum in the bay. Biweekly weighing and monthly blood analysis were performed, totaling four collections per part for hematologic evaluation, carbohydrate, lipid, and protein metabolism variables. At the end of each experiment, ruminal fluid was collected to measure the volatile fatty acid profile, and feces were collected to determine the apparent digestibility coefficient (ADC). Experiments I and II showed no effect of treatment on body weight, weight gain, average daily weight gain, feed intake, and feed efficiency. There was no effect of treatment on leukocyte, erythrocyte, lymphocyte, neutrophil, monocyte, and eosinophil counts, hematocrit, and hemoglobin concentration (p > 0.05). Experiment I showed a difference between groups for the variables albumin, globulin, total proteins, cholesterol, glucose, and urea, which did not happen in Experiment II. In both experiments, a higher ADC of nutrients was found in the treatment group which had cracker residue (p > 0.05). The concentration of volatile fatty acids in Experiment I was higher in the control group, unlike in Experiment II, where the highest concentration was in the treatment group (p > 0.05). Because experiment I had an isometric substitution, the diets had different bromatological composition, which is the probable cause of the difference between groups; this did not happen in experiment II, in which the diets consumed by the animals was isoproteic and isoenergetic. Based on these data we conclude that the substitution of cracker residue in an isomeric or isoenergetic/isoproteic form does not negatively affect weight gain and animal health, as well as reduces the cost of the concentrate, consequently reducing the cost of production of these animals.

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Section: Discussionsupporting

confidence: 91%

Use of Cracker Residue in the Diet of Dairy Heifers: Impacts on Animal Health, Ruminal Fatty Acids Profile, Digestibility, Weight Gain, and Economic Viability

Vitt,

Nascimento,

Brunetto

et al. 2024

Animals

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“…Em estudo recente quanto ao perfil metabólico de vacas Jersey, a hipocalcemia subclínica foi frequente, ocorrendo em 57,1% dos animais no pré-parto e 76,2% no pós-parto. Tem sido atribuída à raça Jersey maior tendência para a hipocalcemia relacionada com menor absorção intestinal, porém, segundo os autores, a hipocalcemia observada teria relação com os valores de albumina que permaneceram próximos ao limite mínimo de referência no período (23) . Não foram encontrados estudos semelhantes com animais Jersolando, e o presente estudo sugere maior adaptação da raça ao manejo adotado nas propriedades de agricultura familiar.…”

Section: Resultsunclassified

Hipocalcemia Em Vacas Leiteiras Da Agricultura Familiar

et al. 2019

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Resumo O objetivo deste trabalho foi avaliar a ocorrência de hipocalcemia associada ou não a hipomagnesemia em vacas leiteiras de propriedades de agricultura familiar. Foram avaliadas 22 vacas das raças Jersey, Holandesa e Jersolando, no período de transição, oriundas de pequenas propriedades de agricultura familiar, com produção média 12L/leite/dia. A concentração do cálcio total e do magnésio séricos foi determinada por metodologia colorimétrica e cálculo do cálcio ionizado estimado a partir das concentrações séricas do cálcio total, de proteína e albumina. Foi observada hipocalcemia em 50% dos animais no pré-parto (8,2±1,4mg/dL) e 63,6% no pós-parto (7,7±1,7 mg/dL). A redução do cálcio ionizado foi menos frequente, com grande parte dos animais apresentando cálcio ionizado estimado dentro da normalidade, com média de 4,6±0,83 mg/dL no pré-parto e 4,3±1,0 mg/dL no pós-parto. Todos os animais apresentaram concentrações de magnésio sérico dentro da normalidade, descartando-se hipomagnesemia. A concentração média de magnésio no pré-parto foi 2,4±0,3 mg/dL com elevação significativa (p<0,05) no pós-parto para 2,7±0,5 mg/dL. Conclui-se que as vacas leiteiras da agricultura familiar são susceptíveis à ocorrência de hipocalcemia e a ausência de sinais clínicos pode estar relacionada à manutenção da concentração de cálcio ionizado próxima da normalidade associada à ausência de hipomagnesemia.

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“…However, these clinical conditions would also correspond with similarly low TPP and PCV levels, which we did not observe. Peripartum cows raised under Brazilian conditions tend to have low ALB levels (ALVARENGA et al, 2017;BIRGEL JUNIOR et al, 2003) that are lower than the international reference values (FÜRLL, 2005;SMITH, 2009), which led Alvarenga et al (2017) to advocate the use of lower national reference values, at least in this stage. It should, however, be noted that we detected no significant differences in ALB when comparing the MIP and SIP groups.…”

Section: Discussionmentioning

confidence: 99%

The glutaraldehyde test and its use in dairy cattle

Bernarski

Silva

Nascimento

et al. 2019

SCA

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During a physical examination of cattle, it is often difficult to evaluate inflammatory processes, particularly in cases where the inflammation occurs in deeper regions. The glutaraldehyde test (GT), carried out using a sample of whole blood, allows the visual and semiquantitative identification of an inflammatory process in cattle. Considering that there are few biochemical tests that can be used in the field, the objective of this study was to verify the efficacy of the GT in detecting and predicting mild and severe inflammatory processes in bovine species, classified according to a physical examination, and in the presence of different diseases or lesions. The GT was used in conjunction with a physical examination in 176 cows over 12 months of age, with additional laboratory evaluations of packed cell volume, total protein, albumin, globulin, and fibrinogen. Using a cutoff point at 3 minutes of coagulation, the GT showed a sensitivity of 35.1%, specificity of 94.1%, positive predictive value of 74.1%, and negative predictive value of 75.2%. The GT correctly detected the most severe inflammatory processes under the field conditions of this study. The GT is a diagnostic aid that can be used as a fast and simple screening test during the physical examination of cattle.

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Perfil metabólico de vacas Jersey clinicamente saudáveis

Cited by 7 publications

References 20 publications

Use of Cracker Residue in the Diet of Dairy Heifers: Impacts on Animal Health, Ruminal Fatty Acids Profile, Digestibility, Weight Gain, and Economic Viability

Use of Cracker Residue in the Diet of Dairy Heifers: Impacts on Animal Health, Ruminal Fatty Acids Profile, Digestibility, Weight Gain, and Economic Viability

Hipocalcemia Em Vacas Leiteiras Da Agricultura Familiar

The glutaraldehyde test and its use in dairy cattle

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