Elizabeth Schwegler
@ifc.edu.br
Veterinary
Instituto Federal Catarinense
EDUCATION
Professor and research
RESEARCH, TEACHING, or OTHER INTERESTS
Veterinary
Scopus Publications
Scopus Publications
Iara Cristina Marins, Bruno Giacomelli, Bruna Correia, Débora Cristina Olsson, Fabiana Moreira, Juahil Martins de Oliveira Júnior, Ivan Bianchi, Elizabeth Schwegler, Candice Bergmann Tanure, Monike Quirino,et al.
MDPI AG
The aims of this study were (i) to evaluate the effect of density, lineage, age, and time of day on dorsal surface temperature and (ii) to evaluate the effect of density and lineage on performance and carcass condemnations in broiler grillers. The evaluations were carried out in barns with the Dark House system, with two densities, 17 and 19 chickens/m2 and two lineages, Cobb and Ross. The dorsal surface temperature of the chickens was measured by infrared thermography at 7, 14, 21, 23, 25 and 27 days of age, four times a day. The average daily weight gain, feed conversion, mortality, partial carcass condemnations, as well as those due to arthritis and dermatosis were also evaluated. The highest dorsal surface temperatures were observed in Cobbs housed at a density of 17 chickens/m2, and in Ross housed at a density of 19 chickens/m2. Cobbs housed at a 17 chickens/m2 density showed the lowest feed conversion compared to Ross at the same density. Ross showed higher dorsal surface temperatures when compared to Cobbs at 14, 21, and 27 days. Cobbs showed higher percentages of partial carcass condemnation and arthritis compared to Ross. The higher density of broiler grillers in the Dark House system does not influence the dorsal surface temperature, performance, dermatosis, arthritis, and partial carcass condemnations.
Pedro Henrique Sousa Ferro, Geany Caroline Ribeiro, Lucas Eduardo Borba, Rosana Oliveira Batista, Daniel da Rosa Farias, Debora Machado Fracalossi, Elizabeth Schwegler, Marco Shizuo Owatari, and Delano Dias Schleder
Springer Science and Business Media LLC
Luciano Adnauer Stingelin, Carlos Eduardo Schell, Maila Palmeira, Giovanne de Mendonça Araujo, Bruno Alexandre Dombroski Casas, Fabiana Moreira, Joao Alveiro Alvarado-Rincón, Augusto Schneider, Vanessa Peripolli, and Elizabeth Schwegler
Springer Science and Business Media LLC
ALD Volpe, A Slaviero, A Scher, PV Molinari, MW Gerber, VM Marcon, F Moreira, I Bianchi, E Schwegler, CB Tanure,et al.
FapUNIFESP (SciELO)
Janaina Colecha Rocha, Emanoelle Regina Rosa, Monike Quirino, Mariana Groke Marques, Paulo Eduardo Bennemann, Arlei Coldebella, Lucio Pereira Rauber, Elizabeth Schwegler, Fabiana Moreira, Vanessa Peripolli,et al.
FapUNIFESP (SciELO)
Greyce Kelly Schmitt Reitz, Mariana Monteiro Boeng Pelegrini, Pietra Viertel Molinari, Uriel Secco Londero, Josiane de Oliveira Feijó, Marcio Nunes Corrêa, Joao Alveiro Alvarado-Rincón, Juliano Santos Gueretz, Vanessa Peripolli, and Elizabeth Schwegler
Universidade Estadual de Londrina
This study assessed the effect of subclinical mastitis on the productivity and inflammatory markers in Jersey dairy cows. Blood, milk, and milk yield data were collected from 59 Jersey dairy cows reared under a semi-extensive system. Milk samples were collected from individual collectors and evaluated for their somatic cell count (SCC), lactose (Lact), protein, fat, total and defatted dry extracts (DDE), casein, freezing point, and milk urea nitrogen (MUN) levels. After milking, blood was collected by puncturing the coccygeal arteriovenous complex. In the serum samples, the inflammatory biomarkers paraoxonase-1, albumin, and total plasma protein levels were analyzed using colorimetric methods. Samples of the entire diet provided and pastures were submitted for bromatological analysis. Additionally, the body condition score, number of lactations, milk yield, days of lactation, calving interval, number of inseminations until conception, calving-conception interval, and days of pregnancy were analyzed. The cows were categorized based on their SCC into a subclinical mastitis group (SubG), with SCC levels greater than or equal to 200,000 cells/mL, and a control group (CG), with SCC levels below 200,000 cells/mL. Blood metabolic variables, milk quality, and milk production data were analyzed using multivariate regression, analysis of variance, and logistic regression using the SAS® program. The multivariate regression analysis revealed that several markers, such as Lact, total protein, and casein, influenced milk composition, predicting over 97% of the data. The SubG showed lower concentrations of Lact (4.37 vs. 4.47%; P = 0.0002), MUN (20.55 vs. 23.85 mg/dL; P = 0.02), and DDE (9.24 vs. 9.50%; P = 0.02) compared with the CG; moreover, animals in the SubG had a higher number of lactations compared with those in the CG (4.30 vs. 2.69; P = 0.0039). Cows with a Lact content lower than 4.265% (quartile 25%), compared with those with Lact content greater than 4.565% (quartile 100%), were 52 times more likely to have subclinical mastitis. Jersey dairy cows with subclinical mastitis have lower Lact, urea, and defatted dry extract levels in their milk as well as a higher number of lactations. Therefore, Lact levels in milk serve as a good diagnostic marker of subclinical mastitis in Jersey cows. Subclinical mastitis in Jersey dairy cows did not decrease milk yield nor effect reproductive performance.
Luciano Araujo Azevedo, Maria Eugênia Andrighetto Canozzi, Julio Cesar Bailer Rodhermel, Elizabeth Schwegler, Alejandro La Manna, Juan Clariget, Ivan Bianchi, Fabiana Moreira, Débora Cristina Olsson, and Vanessa Peripolli
Elsevier BV
Vanessa Peripolli, Bruna Correia, Loirana Lehmkuhl da Rosa, Filipi Zanatta de Carvalho, Fabiana Moreira, Ivan Bianchi, Elizabeth Schwegler, and Juahil Martins de Oliveira Júnior
FapUNIFESP (SciELO)
ABSTRACT: The objectives of this study were to assess the effects of i) pre-incubation storage time of Pekin duck eggs on incubation parameters and ii) different levels of in ovo injection with maltodextrin on Pekin duckling weight. The study was divided into two experiments using hatching eggs of Cherry Valley SM2 hens with egg-laying ages between 31 and 40 weeks. In experiment I, 8,820 eggs were subjected to different periods of pre-incubation storage (one-seven days). For experiment II, 120 eggs weighing between 75 and 85 g were selected and inoculated with 250 µL of 0.75% saline solution with different concentrations of maltodextrin treatments (0%, 1.5%, 3.0%, and 4.5%). In relation to pre-incubation storage time, eggs stored for one day had lower hatching and hatchability rates and higher duckling mortality rates than eggs stored for longer periods (P < 0.05). In ovo injection with 3.0% maltodextrin in 0.75% saline solution significantly increased the hatching weight of Pekin ducklings (53.62 g) compared to that by other study treatments (P < 0.05). Therefore, Pekin duck eggs produced between 31 and 40 weeks of life may be stored between two and seven days without affecting hatchery productivity parameters. The hatching weight of Pekin ducks may be improved with in ovoinjection with 3.0% maltodextrin in 0.75% saline solution.
V. Balbinotti, M. G. A. Menezes, A. M. Silva, F. N. A. Ferreira, V. Peripolli, C. Pilati, I. Bianchi, E. Schwegler, and F. Moreira
Springer Science and Business Media LLC
Domênico Weber Chagas, Josiane de Oliveira Feijó, Marcio Nunes Corrêa, Manoela Furtado, Juliano Santos Gueretz, Vanessa Peripolli, Ivan Bianchi, Fabiana Moreira, and Elizabeth Schwegler
Springer Science and Business Media LLC
Vanessa Peripolli, Gabriela Caillouel, Fernanda Ascencio Pace, Julia Helena Montes, Maiko Giorgi Philippe, José Laerte Nörnberg, Juahil Martins de Oliveira Júnior, Ivan Bianchi, Elizabeth Schwegler, and Fabiana Moreira
FapUNIFESP (SciELO)
Resumo Neste estudo foi explorado o efeito do melaço de cana-de-açúcar em substituição parcial ao milho na dieta sobre os parâmetros sanguíneos e a composição do músculo longissimus thoracis (LT) de suínos em crescimento. Vinte leitoas com 63 dias de idade, pesando 28,98 ± 3,56 kg foram aleatoriamente distribuídas nos tratamentos controle ou melaço de canade-açúcar. O melaço foi incluído ao nível de 3% em substituição parcial ao milho na dieta. Ao início e ao final do experimento foram coletadas amostras de sangue dos animais. Os animais foram abatidos aos 110 dias de idade após 47 dias de experimento pesando 67,9 ± 5,58 kg e uma amostra do músculo LT foi extraída e avaliada. Cada animal foi considerado uma unidade experimental. Não houve diferença entre os tratamentos sobre o comprimento e a área do músculo LT. A espessura de toucinho foi reduzida ao utilizar o tratamento melaço de cana-de-açúcar (5,80 mm) em relação ao tratamento controle (8,90 mm) (P < 0,05). Níveis mais elevados da enzima gama-glutamil transferase (GGT) foram observados nos animais do tratamento controle (67,10 UI/L) em comparação aos animais do tratamento melaço de cana-de-açucar (49,90 UI/L) (P < 0,05). A composição proximal e o perfil e qualidade dos ácidos graxos não foram influenciados pelo tratamento. O melaço de cana-de-açúcar utilizado como fonte energética em substituição parcial ao milho na dieta de suínos em crescimento ao nível de 3% reduziu a espessura de toucinho da carcaça de suínos e melhorou a concentração sérica da enzima gama-glutamil transferase de suínos.
Douglas Rizzotto, Julia Helena Montes, Jalusa Deon Kich, Vanessa Peripolli, Ivan Bianchi, Juahil Martins de Oliveira Júnior, Eduarda Hallal Duval, Elizabeth Schwegler, and Fabiana Moreira
FapUNIFESP (SciELO)
Abstract The objective of this work was to evaluate the contamination by Salmonella sp. and enterobacteria in pig carcasses from the first and last batches slaughtered in a same week, at different stages of the slaughtering line. Samples were collected from the first and last batches slaughtered on Monday and Friday of each week, respectively, during five weeks, totaling ten batches. From each batch, ten carcasses were collected in eight stages of the slaughter line: bleeding, scalding, singeing/evisceration, inspection, spinal cord removal, final washing, blast chilling, and after cooling. A total of 800 samples were analyzed for Salmonella sp. and enterobacteria quantification. The last batch of the week showed twice the chances of the pig carcasses being contaminated with Salmonella sp. and, consequently, a greater amount of enterobacteria (1.00 log10 CFU per square centimeter) than the first batch (0.88 log10 CFC per square centimeter). A higher count of enterobacteria was also observed in the stages of bleeding (2.37 log10 CFU per square centimeter) and scalding (2.36 log10 CFU per square centimeter). The last batches slaughtered in the week show a greater contamination than the first ones, and there is a greater contamination of carcasses by Salmonella sp. and enterobacteria in the initial stages of pig slaughter, i.e., at bleeding and scalding.
J.M. Oliveira Júnior, A.R. Mendes, J.H. Montes, B.R. Alves, F. Moreira, I. Bianchi, E. Schwegler, and V. Peripolli
FapUNIFESP (SciELO)
ABSTRACT The aim of this study was to evaluate the effect of inclusion of two acidifiers blend (with different protection levels) on the acidification potential in vitro, apparent total tract digestibility of diet nutrients, blood metabolites, and average daily gain of nursery piglets. Two commercial acidifiers blend additives (AC1 and AC2) were evaluated. The acidification potential of the two acidifiers blend added to the diet were tested by buffering capacity and initial pH in vitro. For the evaluation of apparent digestibility of diet nutrients, blood metabolites and average daily gain, two experiments were carried out. The AC2 acidifier had a greater effect on the initial reduction in pH and a lower linear buffering rate of the diet. The use of acidifiers did not improve the nutrient digestibility of the diets and had no effect on the blood metabolite concentrations of urea, total protein, albumin, globulin, and lactate. Although the inclusion of acidifiers in the diets did not affect the apparent total tract digestibility of the diet nutrients the inclusion of the AC2 acidifier at different levels showed a negative quadratic effect on the average daily gain, with the best inclusion level being 0.26%.
Fábio da Costa Málaga, , Helloa Alaide Siqueira, Lucio Pereira Rauber, Mariana Groke Marques, Vanessa Peripolli, Elizabeth Schwegler, Juahil Martins de Oliveira Júnior, Fabiana Moreira, Marcos Soares Lopes,et al.
Universidade Estadual de Londrina
In pig farming, measurements of production parameters play a fundamental role in the success of the activity. Minimal differences in fertility between breeders can lead to less reproductive efficiency and, less productivity. However, assessing the fertility of each male and the early identification of subfertile males is a difficult task to be performed. Thus, the aim of this study was to evaluate the use of in vitro and in vivo parameters in the identification of subfertile males of the Landrace breed, aiming to collaborate with genetic improvement programs, routine optimization in the Genetic Diffusion Units (GDUs) and the results of performance. In experiment 1, an approach to identify males with subfertility was evaluated based on retrospective data. For this, the results (averages of birth rates, number of total births and average percentages of female and male piglets per litter) were evaluated for a total of 996 matings and 847 parturitions. The inseminations came from ejaculates of 32 males, who had at least 19 females inseminated with homospermic doses in the concentration of 2.5 x 109 total sperm from the same male. As for the birth rate (BR), an average of 85.47% ± 6.05 was observed with a group of median males, seven males that stood out and one individual (M32) with a performance of 58.06% ± 9.0. For the total number of piglets born (PB) the average was 13.41 ± 0.56, with three males with better performance and one (M32) with very poor performance (8.62 ± 0.59). In experiment 2, it was verified whether evaluations of inseminating doses (ID) of semen in vitro (motility and sperm morphology) after 96 hours of storage had correlations with fertility in vivo, which can be used to identify subfertile males. The evaluations were performed on 30 ejaculates regarding the means of BR and PB, considering only those who had at least 7 females inseminated. There were no correlations between the motility assessments and semen morphological changes and the reproductive parameters evaluated. The results obtained in vivo, referring to BR and PB, demonstrated that it was possible to identify differences between males, the individual (M32) had the worst results for the percentages of BR and PB. It is concluded that there are males of high and low fertility and that only the in vitro analyzes carried out in this study are not enough to categorize them, however, the evaluation of retrospective data was efficient for this purpose.
Thalyta Marcílio, , Bruno Alexandre Dombroski Casas, Diego Hemkemeier Silva, Vanessa Peripolli, Carlos Eduardo Nogueira Martins, Ivan Bianchi, Fabiana Moreira, Juahil Martins de Oliveira Júnior, Elizabeth Schwegler,et al.
Universidade Estadual de Londrina
This study characterized the socioeconomic profile of milk producers and dairy technological of farms in the southern mesoregion of Santa Catarina. Following a 6.5% sampling of total farms by municipality, 95% confidence level, 5% sampling error, and group heterogeneity, data were collected from 308 farms, 22 of which were excluded due to insufficient data. The farmers were selected randomly, and information extracted from an electronic form, addressing social, economic, technical and technological issues. The data were analyzed using factor, cluster, and discriminant analysis. As farms with the main activity of dairy farming, they have an average area of 20.79 hectares and a production of 12.18 liters per animal per day. I n the factor analysis, the first factor was related to the area and productivity of farms and the second factor to sanitary control and the feed variety of the animals. The cluster analysis formed three clusters; the first and the second were composed of larger farms and areas, and the other consisted of smaller farms, the latter involving more producers. As farms are characterized by low production, there is clearly a deficiency in technical support for producers.
M. Palmeira, C.C. Borba Neto, A.A.C. Vieira, E. Schwegler, M. Lehmann, F. Moreira, J.M. Oliveira Jr, I. Bianchi, and V. Peripolli
Cordoba University Press (UCOPress)
Considerando as caraterísticas subtropicais sul do Brasil, onde o verão é caracterizado por sua extensa duração com elevadas temperaturas e altos níveis de umidade, o estresse calórico é fator recorrente e pronunciado na bovinocultura leiteira. TTendo em vista o número expressivo de pequenos produtores e agricultura familiar na região de Santa Catarina, é imprescindível a análise dos impactos do estresse calórico em produções com menores dimensões. Por essas razões, o objetivo do presente estudo foi avaliar o impacto do estresse calórico na produção leiteira de vacas de baixa produção.11 animais foram analisados durante 4 meses (novembro a março), e as produções individuais diárias de leite foram obtidas através de copo coletor acoplado ao sistema de ordenha tipo espinha de peixe, com circuito fechado. Os dados das temperaturas diárias mínima e máxima, bem como a umidade relativa do ar durante o período experimental foram obtidos na estação meteorológica do Instituto Federal Catarinense Campus Araquari. As análises estatísticas foram realizadas com o auxílio do software SAS (versão 9.3, SAS Institute Inc., Cary, NC). Os dados foram submetidos a análise de variância (PROC MIXED) para avaliar o efeito do mês sobre o índice temperatura e umidade e a produção média de leite, e avaliar o efeito do ITU abaixo ou acima de 72 sobre a produção média de leite, além de correlação de Pearson (PROC CORR) e regressão (PROC REG) para avaliar a relação entre o ITU e a produção média de leite. As médias foram comparadas pelo teste de Tukey a 5% de probabilidade de erro. Os animais estudados não tiveram queda na produção quando o ITU foi mais pronunciado, sendo justificado pela baixa produção leiteira dos animais, tendo menor desafio metabólico.
A. Fornazari Neto, C.E.N. Martins, E. Schwegler, J.O.J. Barcellos, and A.L. Barth
FapUNIFESP (SciELO)
ABSTRACT The use of blood metabolites (BM), fecal starch (FS), and apparent digestion of starch, (ATTSD) as indicators of feed efficiency (FE) in beef cattle in the feedlot was studied. Fourteen bulls were used, originating in an industrial cross, without a defined racial group, with mean body weight of 284.86kg, individually fed, being evaluated in a 42-day confinement system. After the evaluation, the animals were divided into two groups according to the individual FE: high feed efficiency (HE) and low feed efficiency (LE). There was a difference between the groups in the variables FE, feed conversion (FC), final weight (FW), and daily weight gain (DWG). The FE had a positive correlation with DWG, FC, and FW. There was no difference between the groups for the variables BM, FS, and ATTSD, nor was there any correlation between these variables and FE. Considering the feed cost, the HE animals proved more profitable. BM, FS, and ATTSD did not statistically show potential to be used as indicators of FE, despite the evidence of numerical differences of these variables between the different groups, tendency of correlations with FE, and discriminating function with potential assertiveness.
Juliano Santos Gueretz, Maiara Boeing, Juliana Murasaki, Elizabeth Schwegler, Anderson Barbosa de Moura, and Maurício Laterça Martins
FapUNIFESP (SciELO)
Abstract Ascocotyle (Phagicola) longa is an etiological agent of human phagicolosis. Mugilids are the second intermediate host, the first being Heleobia australis, and mugilids predatory birds and mammals are its definitive hosts. The occurrence of cysts holding A. longa metacercariae is described in mugilids with a prevalence of up to 100%. The wide geographical distribution of A. longa and its intermediate hosts coupled with the rise in the consumption of raw or poorly cooked fish may elevate the risk of human infection. Therefore, in this study, we aimed to verify the distribution pattern of cysts holding A. longa in mugilids. The tissue and organ samples of these fish were processed in a domestic blender and examined under a stereoscopic microscope to identify the cysts holding the digenetic metacercariae. Of the 24 (100%) fish samples that were analyzed, 12 of Mugil curema and 12 of Mugil liza possessed cysts holding A. longa metacercariae. Digenetic cysts were identified to be present in the gills, heart, stomach, liver, intestines, mesentery, and muscular tissues collected from M. curema and M. liza. Conclusively, in M. curema, the cysts holding A. longa metacercariae were found to be distributed randomly throughout the fish body in almost every tissue and organ that was examined.
D. Bampi, K.K. Borstnez, C.P. Dias, O.A.D. Costa, F. Moreira, V. Peripolli, J.M. Oliveira Júnior, E. Schwegler, L.P. Rauber, and I. Bianchi
FapUNIFESP (SciELO)
ABSTRACT The aim of this study was to evaluate swine females of different genetic lines submitted to different reproductive management and housing systems during pregnancy on reproductive performance and animal welfare parameters. After artificial insemination protocol, 524 females were divided into two gestation housing systems: PEN1=animals housed in individual stalls during the breeding and after group-housed; PEN32=animals housed in individual stalls from breeding until 32 days of pregnancy and after group-housed. The number of piglets born, and the pregnancy and farrowing rates were evaluated. Welfare parameters related to the pregnancy phase were used. Females who weaned more piglets in the previous farrowing had a higher number of piglets born at the next farrowing. The pregnancy rate was affected by the number of semen doses. The farrowing rate was not influenced by the evaluated parameters, with average value of 91.36%. There was no effect of the gestation housing system and the genetic lines on pregnancy and farrowing rates, with values above 90.0%. The animal welfare indicators showed more compromised parameters in PEN1 system. PEN1 system did not impair the reproductive performance although it presented more compromised animal welfare parameters.
Raquel S Schiavon, Mário D Canever, Arnaldo D Vieira, Vanessa Peripolli, Maila Palmeira, Hernani A Silva, Elizabeth Schwegler, Thomaz Lucia Jr, and Ivan Bianchi
Universidad de Antioquia
Background: Factors such as herd composition, productivity, milk quality and technology level influence the costs and profitability of milk production. Objective: To evaluate indicators that could predict production performance and financial efficiency in three dairy production systems in southern Brazil. Methods: Monthly records of milk quality, production performance and costs from fifty dairy farms were collected. The farms were classified into grazing, semi-feedlot
Elizabeth Schwegler, Augusto Schneider, Ana Rita Tavares Krause, Paula Montagner, Eduardo Schmitt, Francisco Augusto Burkert Del Pino, Viviane Rohrig Rabassa, Eduardo Gularte Xavier, Cláudia Faccio Demarco, Vanessa Peripolli,et al.
Universidade Federal do Rio Grande do Sul
Background: Bovine mastitis causes major economic losses for milk producers by reducing the quantity and the quality of the milk or even leading to the complete loss of the mammary gland secretory capacity. During the transition period, dairy cows are susceptible to infectious diseases; therefore, markers that allow early identification of cows in higher risk of developing diseases are especially useful at this time. Therefore, the aim of this study was to evaluate serum markers in the pre and postpartum of multiparous dairy cows with clinical mastitis and with health condition in the postpartum period in a semi-extensive management system.Materials, Methods & Results: Thirty-Six Holstein cows were monitored daily during milking until 59 days postpartum and were categorized according to the pre-milking strip cup test into clinical mastitis (mastitis group (MG)) and absence of symptoms (control group (CG)) that were negative to the test, representing the health cows. All cows were reared as one group and maintained in a semi-extensive pasture-based system. Blood samples were collected weekly after morning milking via venipuncture of the coccinea vein into tubes without anticoagulant and grouped for prepartum (-21 to 0 days from calving), early postpartum (0 to 30 days from calving), and late postpartum (30 to 59 days from calving) periods. Milk production was recorded daily. The serum markers albumin, aspartate aminotransferase (AST), phosphorus, gamma-glutamyltransferase (GGT) and non-esterified fatty acids (NEFA) were measured. Statistical analyses were performed using SAS®. The cases of clinical mastitis occurred on average at 37.2 ± 4.9 days postpartum. Health cows (CG) had higher milk production compared to the mastitis group (MG) only in the late postpartum period (P < 0.05). There was no difference among groups for albumin and NEFA concentrations in all periods evaluated (P > 0.05). In the early postpartum period the AST activity was higher in CG than in MG (P = 0.02). The GGT enzyme tended to be more concentrated in the CG than in the MG during the early (P = 0.06) and late (P = 0.08) postpartum periods. Late postpartum phosphorus concentration was lower for MG than CG (P = 0.04). In the prepartum and early postpartum periods, there was no difference among groups for phosphorus concentration (P > 0.05).Discussion: A decrease in milk production in MG compared to CG observed in late postpartum period was due to the incidence of mastitis observed around 37 days postpartum. Cows that presented clinical mastitis in the postpartum period did not differ in the blood concentration of NEFA in the prepartum period. In the late postpartum period higher concentration of phosphorus was observed in the CG than in MG, indicating that animals affected by mastitis may be in the weakest energy status. Regarding liver health, the concentration of AST was higher in the recent postpartum period for CG, in disagreement with previous studies that related AST to tissue injury caused by mastitis. The GGT enzyme tended to had higher concentrations in CG than MG during the whole postpartum period and may be related to increased hepatic metabolism due to higher production. There were no changes in albumin levels among healthy and mastitis cows, indicating that this marker can not be used to predict clinical mastitis. There were no metabolic alterations in the prepartum period related to the occurrence of postpartum mastitis in multiparous cows in a semi-extensive management system.Keywords: AST, dairy cows, NEFA.
Elizabeth Schwegler, Paula Montagner, Eduardo Schmitt, Augusto Schneider, Marina Menoncin Weschenfelder Rohenkohl, Ana Rita Tavares Krause, Rubens Alves Pereira, Jéssica Halfen, Francisco Augusto Burkert Del Pinto, and Marcio Nunes Corrêa
Universidade Federal do Rio Grande do Sul
Background: The post-partum period in dairy cows is accompanied by a low glucose metabolism in adipose tissue and skeletal muscle tissue, being glucose conducted to the milk production. In humans, low glucose metabolism is associated with metabolic syndromes, the high glucose levels reduce tubular reabsorption of Magnesium (Mg) and Calcium (Ca), leading to hypomagnesemia and hypocalcemia. These minerals are important to the dairy cow, as their decrease leads to diseases. The aim of this study was to evaluate the relationship between glucose metabolism rate with the urinary excretion of Ca and Mg in multiparous dairy cows during the post-partum period.Materials, Methods & Results: Twenty dairy cows were used from a commercial farm southern Brazil, in the semi-extensive system. Glucose tolerance tests were performed (TTG) on day 9 relative to calving. The cows were categorized into three groups according to the glucose metabolism rate (area under the glucose curve, glucose half-life and glucose consumption rate): High Glucose Metabolization (GA); Intermediate Glucose Metabolizing (GI); and Low Glucose Metabolization (GL). Blood and urine samples were collected on days 0, + 3, + 6, + 9, +16 and +2 3 in relation to calving for to determine the levels of Ca, Mg, insulin (Ins), non-esterified fatty acids (NEFA) and Glu. In urine was evaluated the excretion of Ca and Mg. The cows were milked twice a day (at 3:00 a.m. and 3:00 p.m.) and the milk yield (kg/cow) was recorded daily and averages were generated every five days from day 15 to day 60 postpartum. The statistical analyses were performed with the MIXED procedure to assess the main effect of group, time (in days) and their interaction by using version 9.2 SAS software. The influence of the different rates of glucose metabolism on milk production was observed, the GB group had a production than GH group (30.88 ± 1.44 kg vs 23.96 ± 1.43 kg, P < 0.01), but did not differ from GI. The GL group showed higher levels of Glu compared to GA (P < 0.05). The plasma Ca levels were higher in GL (P < 0.05) compared with GH. The NEFA, insulin, and excretion of minerals did not differ between groups (P > 0.05).Discussion: The low glucose metabolism in humans causes an increase in the excretion of Ca and Mg urine, however, in the animals studied, these changes were not observed. This result can be attributed to the fact that insulin resistance is transitory in dairy cattle. The higher glucose levels in the GL group are related due to the lower capacity of glucose entry in the peripheral tissues (adipose and skeletal muscle), which reflected in the higher milk production observed this group. However, the higher calcium concentrations were not expected, since the release of insulin by β-pancreatic cells is dependent on calcium. Possibly, these higher calcium levels in GB, are related to higher milk production, requiring a greater amount of calcium for the production of casein, increasing bone mobilization, intestinal absorption. The energy metabolites, non-esterified fatty acids and insulin, did not differ between groups, suggesting that the animals did not present different metabolic conditions. We conclude that multiparous dairy cows with low glucose metabolism rate (GB) have higher levels of glucose after delivery and increased milk production. The metabolism rate of glucose did not influence the excretion of the Ca and Mg minerals.
Marina Menoncin Weschenfelder Rohenkohl, Matheus Gomes Lopes, Antônio Amaral Barbosa, Ana Rita Tavares Krause, Paula Montagner, Elizabeth Schwegler, Cássio Cassal Brauner, Augusto Schneider, Eduardo Schmitt, Francisco Augusto Burkert Del Pino,et al.
Universidade Estadual de Londrina
The action of the bovine placental lactogen (bPL) hormone on maternal metabolism is still poorly known. Some markers, such as the acute phase protein paraoxonase (PON1), are used as indicators of liver function and help to determine the metabolic condition during the transition period in dairy cows. The aim of this study was to evaluate the activity of paraoxonase (PON1) in the serum of peripartum dairy cows with different levels of bPL. Based on the plasma bPL concentration, 18 cows were divided equally into three groups: LOW ( < 2,68 ng bPL mL-1), MEDIUM (2,68–2,80 ng bPL mL-1), and HIGH ( > 2,80 ng bPL mL-1). The experiment was conducted between 21 days prepartum and 28 days postpartum. Serum samples were collected during the experiment for the determination of bPL concentrations and PON1 activity. The bPL concentration was significantly different between the experimental groups (P ? 0,0001) and the days of serum collection (P ? 0,0001). In the prepartum dairy cows, the PON1 levels were different between the groups (P ? 0,05) and the days of serum collection (P ? 0,05). Cows with high bPL concentration had lower serum PON1 activity (P ? 0,05), while cows with low hormone levels had higher enzyme activity (P ? 0,05). In the postpartum period, there was a significant difference between the days of serum collection (P ? 0,0001) and the interaction between groups and collections (P ? 0,01). The group with high concentrations of bPL had lower levels of PON1 (P ? 0,01), while the group with low bPL maintained higher concentrations of PON1 (P ? 0,01). It was concluded that the cows with higher concentrations of bPL in the prepartum period present a reduction in the serum activity of the PON1 enzyme during the peripartum period.
V.C. Tabeleão, E. Schwegler, R.A. Pereira, A.R.T. Krause, P. Montagner, J.O. Feijó, A. Schneider, E. Schmitt, C.C. Brauner, V.R. Rabassa,et al.
FapUNIFESP (SciELO)
RESUMO A hipótese deste estudo é de que o uso da combinação de butafosfan e cianocobalamina pode melhorar a resistência periférica à insulina, aumentar a quantidade de glicose disponível para a glândula mamária e a produção de leite. Assim, o objetivo foi investigar os efeitos combinados de butafosfan e cianocobalamina sobre o metabolismo da glicose em vacas leiteiras no período pós-parto. Vinte e uma vacas leiteiras foram divididas em dois grupos: grupo controle (CON, n= 11), que recebeu cinco aplicações de solução salina (20mL / animal 0,9% NaCl), e grupo Catosal(r) (ABC, n= 10), que recebeu cinco aplicações de 20mL de uma solução contendo as substâncias butafosfan e cianocobalamina (B12 Catosal(r), 100mg da substância butafosfan e 50µg de cianocobalamina por mL). As aplicações foram realizadas por via intramuscular, nos dias sete, 12, 17, 22 e 27 pós-parto. As amostras de sangue foram coletadas para a avaliação das concentrações plasmáticas de fósforo, glicose, ácidos graxos não esterificados (AGNE), albumina, aspartato aminotransferase (AST) e creatina quinase (CK). Nos dias oito e 28 pós-parto, os animais foram pesados e submetidos aos testes de tolerância à glicose e à insulina. O tratamento promoveu perda de peso (ABC 40,4kg, CON 10,73kg, P<0,05) e aumento da AST (ABC 62,92 ±3,31U/L, CON 53,11±3,49 U / L, P<0,05) e dos níveis de CK (ABC 134,09± 19,08U / L, CON 79,43 ± 18,27U / L). Os grupos não diferiram quanto ao metabolismo (área sob a curva) da glicose nos dias oito e 28, porém os animais tratados tiveram um aumento na glicemia (P<0,05) no dia 28 pós-parto (97,54 ± 8,54mg / dL), após a administração de insulina, em comparação ao dia oito (83,01 ± 8,54mg / dL). Assim, pode-se concluir que a combinação de butafosfan e cianocobalamina melhora a adaptação do metabolismo da glicose em vacas leiteiras no início da lactação.