Abstracts
The objective of this study was to evaluate and compare the transfer of passive immunity and the proteinogram in Criollo Lageano (CL) and Black and White Holstein (BWH) calves. Two groups were utilized with 13 Criollo Lageano and 10 BWH calves. Blood samples were collected for the measurement of total serum protein, electrophoresis of serum proteins, activity of the gamma glutamyl transferase, and concentration of IgG by the method of the zinc sulfate turbidity in periods between 24 and 36 hours of life, 15, 30, 60, 90, 120, 150 and 180 days. Statistical analysis was performed by ANOVA and Tukey test at 5% significance level, and correlations between variables were calculated. Variations of serum proteins followed a pattern of physiological behavior over the first six months of life and production of immunoglobulins was active earlier in BWH calves and slower in the Criollo Lageano, without causing any impact on their health. Gamma globulin in the first days of life (24-36h) was correlated with IgG (r=0.87 for CL and r=0.89 for BWH), PTS (r=0.91 for CL and r=0.92 for BWH), Glob (r=0.99 for CL and r=0.98 for BWH) and GGT (r=0.14 for CL and r=0.83 for BWH). It was concluded that there was no failure in the transfer of passive immunity in Criollo Lageano calves but this failure occurred in the BWH calves. IgG values estimated by the zinc sulfate turbidity and serum proteins were considered good indicators of the transfer of passive immunity in calves between 24 and 36 hours of life.
Immunoglobulins; bovine; serum proteins; native breeds
O objetivo do presente trabalho foi verificar e comparar a transferência de imunidade passiva e o proteinograma em bezerros da raça Crioula Lageana (CL) e Holandesa Preta e Branca (HPB). Foram utilizados dois grupos sendo 13 bezerros da raça Crioula Lageana e 10 da raça HPB. Amostras de sangue foram colhidas para a mensuração da proteína sérica total, eletroforese das proteínas séricas, atividade da gama-glutamiltransferase e concentração de IgG pelo método de turvação pelo sulfato de zinco nos períodos entre 24 e 36 horas de vida, 15, 30, 60, 90, 120, 150 e 180 dias. A análise estatística foi realizada pelo teste de ANOVA e Tukey ao nível de 5% de significância, e correlações entre as variáveis. As variações das proteínas séricas obedeceram a um padrão de comportamento fisiológico ao longo dos seis primeiros meses de vida e a produção ativa de imunoglobulinas foi mais precoce nos bezerros da raça Holandesa e mais lenta nos da raça Crioula Lageana, sem provocar qualquer impacto sobre a saúde dos mesmos. A gamaglobulina no primeiro dia de vida (24-36h) correlacionou-se com a IgG (r=0,87 CL e r=0,89 HPB), PTS (r=0,91 CL e r=0,92 HPB), Glob (r=0,99 CL e r=0,98) e GGT (r=0,14 CL e r=0,83 HPB). Conclui-se que não houve falha na transferência de imunidade passiva nos bezerros da raça Crioula Lageana e falha na raça Holandesa Preta e Branca. Os valores de IgG estimados pelo método da turvação pelo sulfato de zinco e das proteínas séricas foram bons indicadores da transferência de imunidade passiva nos bezerros entre 24 e 36 horas de vida.
Imunoglobulinas; bovino; proteínas séricas; raças nativas
LIVESTOCK DISEASES
Transfer of passive immunity and serum proteinogram in the first six months of life of Criollo Lageano and black and white holstein calves
Transferência de imunidade passiva e proteinograma sérico de bezerros das raças Crioula lageana e Holandesa preta e branca nos primeiros seis meses de vida
William Timboni TeixeiraI; Graziela Vieira FontequeII; Alexandre Floriani RamosIII; Arthur da Silva MarianteIII; Andrea Alves do EgitoIV; Vera Maria Villamil MartinsV; Mere Erika SaitoV; Joandes Henrique FontequeV,*
IAcadêmico de Medicina Veterinária, Bolsista de Iniciação Científica (PIVIC/UDESC), Departamento de Medicina Veterinária, Centro de Ciências Agroveterinárias (CAV), Universidade do Estado de Santa Catarina (UDESC), Av. Luiz de Camões 2090, Bairro Conta Dinheiro, Lages, SC 88520-000, Brazil
IIDocente do Centro Universitário Facvest, Av. Marechal Floriano 947, Lages, SC 88501-103, Brazil
IIIPesquisador da Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica PqEB, Av. W5 Norte (final), Brasília, DF 70770-917, Brazil
IVPesquisador da Embrapa Gado de Corte, BR 262 Km 4, Cx. Postal 154, Campo Grande, MS 79002-970, Brazil
VDocente do Departamento de Medicina Veterinária, CAV-UDESC, Lages, SC
ABSTRACT
The objective of this study was to evaluate and compare the transfer of passive immunity and the proteinogram in Criollo Lageano (CL) and Black and White Holstein (BWH) calves. Two groups were utilized with 13 Criollo Lageano and 10 BWH calves. Blood samples were collected for the measurement of total serum protein, electrophoresis of serum proteins, activity of the gamma glutamyl transferase, and concentration of IgG by the method of the zinc sulfate turbidity in periods between 24 and 36 hours of life, 15, 30, 60, 90, 120, 150 and 180 days. Statistical analysis was performed by ANOVA and Tukey test at 5% significance level, and correlations between variables were calculated. Variations of serum proteins followed a pattern of physiological behavior over the first six months of life and production of immunoglobulins was active earlier in BWH calves and slower in the Criollo Lageano, without causing any impact on their health. Gamma globulin in the first days of life (24-36h) was correlated with IgG (r=0.87 for CL and r=0.89 for BWH), PTS (r=0.91 for CL and r=0.92 for BWH), Glob (r=0.99 for CL and r=0.98 for BWH) and GGT (r=0.14 for CL and r=0.83 for BWH). It was concluded that there was no failure in the transfer of passive immunity in Criollo Lageano calves but this failure occurred in the BWH calves. IgG values estimated by the zinc sulfate turbidity and serum proteins were considered good indicators of the transfer of passive immunity in calves between 24 and 36 hours of life.
Index terms: Immunoglobulins, bovine, serum proteins, native breeds.
RESUMO
O objetivo do presente trabalho foi verificar e comparar a transferência de imunidade passiva e o proteinograma em bezerros da raça Crioula Lageana (CL) e Holandesa Preta e Branca (HPB). Foram utilizados dois grupos sendo 13 bezerros da raça Crioula Lageana e 10 da raça HPB. Amostras de sangue foram colhidas para a mensuração da proteína sérica total, eletroforese das proteínas séricas, atividade da gama-glutamiltransferase e concentração de IgG pelo método de turvação pelo sulfato de zinco nos períodos entre 24 e 36 horas de vida, 15, 30, 60, 90, 120, 150 e 180 dias. A análise estatística foi realizada pelo teste de ANOVA e Tukey ao nível de 5% de significância, e correlações entre as variáveis. As variações das proteínas séricas obedeceram a um padrão de comportamento fisiológico ao longo dos seis primeiros meses de vida e a produção ativa de imunoglobulinas foi mais precoce nos bezerros da raça Holandesa e mais lenta nos da raça Crioula Lageana, sem provocar qualquer impacto sobre a saúde dos mesmos. A gamaglobulina no primeiro dia de vida (24-36h) correlacionou-se com a IgG (r=0,87 CL e r=0,89 HPB), PTS (r=0,91 CL e r=0,92 HPB), Glob (r=0,99 CL e r=0,98) e GGT (r=0,14 CL e r=0,83 HPB). Conclui-se que não houve falha na transferência de imunidade passiva nos bezerros da raça Crioula Lageana e falha na raça Holandesa Preta e Branca. Os valores de IgG estimados pelo método da turvação pelo sulfato de zinco e das proteínas séricas foram bons indicadores da transferência de imunidade passiva nos bezerros entre 24 e 36 horas de vida.
Termos de indexação: Imunoglobulinas, bovino, proteínas séricas, raças nativas.
INTRODUCTION
Brazil has several cattle breeds that have developed from breeds brought by the Portuguese settlers after the discovery. Unlike other countries in the Americas Brazil received Spanish cattle breeds, the first ones to step into the New World, as well as breeds of Portuguese origin, whose introduction was first made 34 years after the discovery of Brazil (Mazza et al. 1994, Primo 2000). These breeds have been submitted to natural selection in different environments, and developed specific adaptive traits (Egito et al. 2002, Cardellino 2005). The Criollo Lageano breed originated from cattle introduced to Rio Grande do Sul by the Jesuits (Araújo 1990). It is probable that many animals have been lost along the way, and looking for shelter in the woods of the Plateau of Santa Catarina, began to form herds in open fields of Lages. With the colonization of the Santa Catarina Plateau, the settlers brought cattle, which probably crossed with cattle already existing in the region, leading to the formation of the Criollo Lageano breed. By the beginning of last century, The Criollo Lageano was the predominant breed in the fields of Lages, and of the Plateau of Santa Catarina (Mariante & Cavalcante 2000, Camargo & Martins 2005, Martins et al. 2009), acquiring unique adaptive traits to the ecological niches where they have developed (Primo 1993, Mariante et al. 1998). In Brazil, few studies have been conducted using naturalized cattle breeds (Egito et al. 2007, Spritze et al. 2003, Serrano et al. 2004, Bianchini et al. 2006). The study of these breeds can assist in developing future programs of animal breeding and of animal conservation (Egito et al. 2002, Serrano et al. 2004). Some breeds may contain alleles that confer resistance to diseases or adaptation to less favorable environmental conditions, which may be extremely important for genetic improvement (Woolliams et al. 1986). With the development of the cattle industry in Brazil, neonatal mortality has a great importance in dairy and beef herds and may affect between 6 and 85 of the newborns (Rogers et al. 1985, Petterson et al. 1987), but this percentage may reach 25 or even 50 % of all newborns (Radostits et al. 1994). In dairy herds, approximately 75% of deaths of animals under twelve months of age occur in the first months of life (Radostits et al. 1994). Feitosa (1998) followed 40 Holstein calves from birth to one year of age and observed a mortality rate of 22.5%. According to the observations of Gonçalves et al. (1993) and Benesi (1996), mortality of calves in Brazil is mainly caused by diarrhea and pneumonia, and the mortality rate may reach 25%. According to Norheim & Simensen (1985), the rate of calves presenting hypogammaglobulinaemia is high, showing a high rate of failure in the transfer of passive immunity. In some herds, these values reach 40% of the born animals (McGuire & Adams1982, Barragry 1997). Mc-Guire et al. (1976) and Wittum & Perino (1995) reported that the failure of passive transfer of immunity (FPTI) is the leading cause of death in neonates. According to Feitosa et al. (2010) the failure of passive transfer of immunity varies from 10 to 20% in Holstein and Nellore breeds, depending on the blood component and the standard values chosen for their estimation and interpretation. The physiology of the bovine placenta differs from other species, because there is no transfer of immunoglobulins through the placenta. This fraction of the serum protein is responsible for the humoral defense of the neonate against infectious agents, and should be absorbed soon after birth by the ingestion of colostrum. The colostrum is rich in immunoglobulins, which suffer greater absorption up to the first 12 hours of the calf's life (Zanetti et al. 1982). The absorbed colostral immunoglobulins have a short half-life (20 days for IgG) in the circulatory system of the calf (Besser & Gay, 1994). Generally, after the peak of serum concentration at 24 hours of life, there is an increasing reduction up to 30 or 45 days of age, when a new upward trend is established, which is due to the active synthesis of antibodies by the immune system (Ribeiro et al. 1983, Moraes et al. 1997, Fagliari et al. 1998, Feitosa 1998, Costa 2000, Pauletti et al. 2003). The objective of this work was to study the physiological aspects related to the transfer of passive immunity and serum proteinogram in Criollo Lageano calves, and compare the results with the ones found for Black and White Holstein calves.
MATERIALS AND METHODS
The project was developed by a multidisciplinary team that involved different institutions: the University of the State of Santa Catarina (UDESC), the Agricultural Research and Rural Extension Corporation of Santa Catarina (EPAGRI), the Brazilian Agricultural Research Corporation (Embrapa), the State University of Londrina (UEL) and the Brazilian Criollo Lageano Cattle Breeders Association (ABCCL). The protocol was approved by the Ethics Committee on Animal Experiments of UDESC (CETEA) under the registration number 1.19.08. During this experiment 13 Criollo Lageano and 10 Black and White Holstein calves were used. The animals were randomly selected, and were healthy at birth and at the first days of life. The Criollo Lageano calves were obtained from three different farms: Bom Jesus do Herval and Canoas, both located in Ponte Alta - SC, and Grande, located in Painel/SC. The management practiced in these three farms was extensive, under conventional conditions with individual control of the animals and good nutritional and health standards. The Black and White Holstein calves were obtained from the Agricultural Research and Rural Extension Corporation of Santa Catarina (EPAGRI), located in Lages/SC. The management at EPAGRI was semi-intensive, with good individual control and adequate nutritional and health management. During the experimental period there were two daily observations to identify the occurrence of births. The calves remained in constant contact with their mothers and did not receive any aid for ingestion of colostrum. In their first day of life, the calves received an ear tag, and had their navel healed with an iodine-based product (2% tincture of iodine). During the six months of the experiment, the calves did not receive any vaccine nor had any change in management. Blood samples were collected by jugular vein puncture into vacuum tubes without anticoagulant (Vacuum IIâ , Labnew, Sao Paulo, Brazil) in the periods between 24 to 36 hours after birth (M1), and at 15 (M2), 30 (M3), 60 (M4), 90 (M5), 120 (M6), 150 (M7), and 180 days (M8) of life. Whole blood was separated and the serum stored at -20ºC to perform the analyses involving total protein concentration, activity of gamma glutamyl transferase and protein electrophoresis in agarose gel. The dosage of gamma glutamyl transferase, total serum protein and electrophoresis were performed at the Laboratory of Clinical Pathology, Londrina State University (UEL), Londrina/PR. The determination of total protein was done by the biuret method, employing commercial reagents (Gold Analisa) and spectrophotometry (200 Airone - Wienerlab) according to Jain (1993). The gamma glutamyl transferase activity was determined by the colorimetric kinetic method according to the modified technique of Szasz et al. (1969), using commercial reagents (Gold Analisa) and spectrophotometry (200 Airone - Wienerlab). Serum concentrations of protein fractions albumin, alpha, beta and gamma globulins were determined by electrophoresis (Kremers et al. 1967) using agarose gel (Celmgel, CELM general agarose gel), Tris pH 9.5 (CELM) and an electrophoretic run for 20 min in a 100V current (SE-250 System, CELM). After the procedure, the gel was stained with 2% black starch and bleached with 5% acetic acid. The proportion of each protein fraction was established by the software SDS-60 (CELM) of the SE-250 System (CELM) after reading through a scanner. The determination of serum immunoglobulin G was estimated by the technique of the zinc sulfate turbidity with a spectrophotometry reading, according to the method employed by Pfeiffer et al. (1977) with modifications. A total of 0.1 mL of serum to 6 mL of a solution containing 208mg of ZnSO47H2O per liter of distilled water. After one hour rest, the absorbance of the mixture was measured spectrophotometrically (Cintra 5, GBC Scientific Equipment) at a wave length of 620nm. Due to the instability of the solution, three readings were made and the considered result was the final average. The amount of IgG was estimated using a standard curve previously drawn with known concentrations of bovine IgG (Single Radial Immunodiffusion Kit; VRMD, USA), as follows: zero (fetal bovine serum), 400, 800, 1600 and 3200mg/dL. Samples that exceeded the estimated value of 3200mg/dL were processed again after the dilution of the serum in saline solution at a 1:1 ratio. The statistical analysis was performed by means of the analysis of variance for repeated measures (ANOVA) and Tukey test for comparison between means, assuming an error probability of 5%. Correlation coefficients were calculated among variables (Curi 1998).
RESULTS AND DISCUSSION
The results of total serum protein concentration, electrophoretic profile of serum proteins in agarose gel, relation albumin: globulin, IgG concentration by the method of the zinc sulfate turbidity, and activity of gamma glutamyl transferase (GGT) are shown in Table 1. During the conduction of this work two calves have been culled, one of the Criollo Lageano breed, due to transfer of his mother to another property, for management reasons, and the second one was a Black and White Holstein calf that came to death due to the failure on the passive immunity transfer (FPIT). The value of total protein of the calf was 4.4g/dL from 24 to 36 hours, being considered a failure on the passive immunity transfer (FPIT) according to Donovan et al. (1998), that consider that a minimum value of 5.0g/dL. During the experimental period some Black and White Holstein calves presented some health problems, like diarrhea, one calf had an umbilical hernia and another presented hemoparasitosis. The thickening of the umbilical extracavitary structures (omphalitis) was observed in one Criollo Lageano calf. Animals that required any type of treatment presented a good recovery. The concentrations of total protein and serum immunoglobulins observed in the first day of life differed (P<0.05) between the breeds, being higher in the Criollo Lageano (Table 1). However, concentrations of IgG and GGT did not differ statistically, but again were higher in Criollo Lageano. Fagliari et al. (1998) reported higher values of proteins and globulin in Nellore calve when compared to Holstein calves, without differences in average values of GGT. Costa et al. (2008) found no significant difference when compared a Bos indicus breed (Nellore), with a Bos taurus breed (Limousin). According to Donovan et al. (1998), FPIT can be indirectly assessed by the total serum protein values measured soon after birth, and are associated with morbidity and mortality of calves. Mortality rate is higher when the protein concentration is less than 5.0g/dL. Therefore, it can be considered that the process of transfer of passive immunity was higher in Criollo Lageano compared to the Black and White Holstein calves. Three Black and White Holstein calves presented total serum protein values below 5.0g/dL (4.4g/dL, 4.68g/dL and 4.30g/dL) which, according to Donovan et al. (1998) indicates FPIT. One of the calves with FPIT came to death, and the other two remained in the experiment. According to Feitosa et al. (2001a) there is a huge discrepancy of opinions among researchers about the definition of an optimal concentration of total serum protein, GGT and immunoglobulins of newborn calves that may give them an inadequate passive immunity. According to Naylor et al. (1977) this value would be 6.0 g/dL, while according to Heath (1992) would be 5.5g/dL and to Rea et al. (1996) would vary from 5.0 to 4.6g/dL. In comparison to beef breeds, breast feeding of dairy calves is associated with a high failure rate in the transfer of passive immunity, due to a delayed feeding associated with low intake of colostrum (Logan 1975, Rajala 1995). Differences between the methods of feeding beef and dairy calves significantly influence the concentration of immunoglobulins in the neonate (Logan 1974, Rauprich 2000). According to Pritchett et al. (1991), Gay & Besser (1994) and Guy et al. (1994) the concentration of IgG is higher in beef heifers than in dairy heifers, probably due to a larger milk production causing a greater dilution. When the concentration of gamma globulins and globulins were compared between breeds in the first day of life, Criollo Lageano calves presented higher values (P<0.05) than the Holstein calves (Table 1). However, IgG concentration showed no significant difference between breeds, but again the highest concentrations were found in the Criollo Lageano calves. These results are in agreement with Gay & Besser (1994), Guy et al. (1994) and Suh et al. (2003) in which beef breeds presented higher concentrations of IgG when compared to dairy breeds, which may explain their higher resistance to infectious diseases. The serum concentration of IgG is considered critical in calves, and is identified as an indicator of success in the transfer of immunity, range from 1000 mg/dL (Radostits et al. 2002) to 1600mg/dL (McGuire & Adams 1982). Values between 500 and 1500mg/dL (Selim et al. 1995) and from 600 to 1600mg/dL (McGuire & Adams 1982) may be indicative of a partial FPIT. Considering the individual results only two Black and White Holstein calves presented a partial failure in the transfer of passive immunity (806mg/dL and 831mg/dL). The mean values of IgG in both Criollo Lageano and Black and White Holstein calves were much larger than those identified as critical, and the Criollo Lageano calves showed higher values when compared to Black and White Holstein ones. According Guk-Hyun et al. (2003), when comparing calves of beef and dairy breeds, there is a high failure rate in the transfer of passive immunity due to delays in feed intake and low ingestion in dairy breeds. There is a difference between feeding methods of beef and dairy cattle, influencing serum concentration of immunoglobulins, with the beef calves presenting higher concentrations than the dairy ones. The highest concentration of immunoglobulins was observed at 24-36h of age, indicating the maximum absorption of colostral immunoglobulins, which is in agreement with Costa et al. (2008). The sampling occurred only after the first 24 hours of life, thus avoiding the upward curve that precedes the peak serum concentration (Fagliari et al. 1996, Borges 1997, Feitosa et al. 2001b, Leal et al. 2003, Machado Neto et al. 2004). No samples were collected before ingestion of colostrum to prevent rejection of newborn calves by their mothers and by the difficult management of Criollo Lageano calves, raised extensively. According to Feitosa (1999), dairy cattle have a higher rejection rate than beef cattle, but during this experiment no rejection of calves was observed by Holstein or Criollo Lageano cows. The concentration of immunoglobulins after a peak at 24-36h of age is followed by a continuous decline due to degradation and its combination with antigen, and presented minimum values at 60 days of age in both studied breeds. This behavior is described as a classic curve of this physiological process observed in other cattle breeds (Feitosa et al. 2001b, Amorim 2002, Leal et al. 2003, Machado Neto et al. 2004). IgG concentration in the Black and White Holstein calves reached the lowest value at 30 days of age, differing from Criollo Lageano that presented the lowest IgG at 60 days of age. These data agree with reports by Rib eiro et al. (1983), Borges (1997), Moraes et al. (1997), Costa (2000), Feitosa et al. (2001b) and Pauletti et al. (2002), working with dairy cattle. This difference may be due to breed factors and to the different farming systems. The intensive management of the Holstein calves can lead to an early contact and a greater exposure to infectious agents, leading to a rapid consumption of antibodies. Extensively managed beef calves are, in turn, subjected to natural challenges of lesser magnitude (Costa et al. 2008). The elevation of gamma globulin after its decrease at 60 days of age began gradually at 90 and at 120 days, reaching its maximum concentration at 150 days, decreasing afterwards, at 180 days of age. This behavior was similar for the calves of the two breeds and is similar to the results reported by Borges (1997), Costa (2000), Feitosa et al. (2001b) and
Costa et al. (2008). However, when analyzing the curve of IgG concentration it was noted that in the Holstein calves the lowest values were observed at 30 days of age, and that the increase occurred earlier than in the Criollo Lageano calves. This result resembles the one found by Machado Neto et al. (2004) when studying Canchim and Nellore calves. These findings show that the active synthesis of IgG in Criollo Lageano calves may occur later. However, this does not necessarily imply that these animals are more subjected to infection during this period. However, it is assumed that the calf is more susceptible to infections at this critical age, that is marked by the time interval in which the serum concentrations of immunoglobulins are at their lowest, and is the period between the end of the degradation process of passively transferred immunoglobulins and their active production by competent immune system (Radostits et al. 2002). The change in the ratio albumin:globulin (A:G) is usually the first sign of change in the normal protein profile (Costa et al. 2008). According to Leal et al. (2003) the largest variations occur from birth to the first month of life and are a result of alterations on the two types of protein. In the Black and White Holstein calves it was observed that the highest values of the albumin:globulin ratio were identified at 30 days of age, while in the Criollo Lageano this peak occurred at 60 days of age. Thereafter the values decreased but remained higher for the Criollo Lageano. The albumin concentration was lower at birth and rose until the 60th day of life in Holstein and until the 90th day in the Criollo Lageano calves (Table 1). The reversal in the concentrations of albumin and globulin led to an increase in the ratio A:G. This relationship tends to decrease after the onset of the endogenous production of immunoglobulins. The alpha1 and alpha2 fractions, as well as beta globulins showed little variation during the experimental period and were similar in both breeds. The gamma glutamyl transferase (GGT) is a liver enzyme present in high concentration in the bovine colostrum and is absorbed by intestinal cells of newborn calves (Thompson & Pauli 1981, Braun et al. 1982, Fagliari et al. 1996, Zanker et al. 2001). One can consider that the activity of the serum GGT serves as an indirect indicator of the absorption capacity of immunoglobulins of the neonate (Feitosa et al. 2001a). In the studied breeds, GGT activity showed maximum serum activity from 24 to 36 hours of life, decreasing rapidly to reach physiological values at 60 days of age (Table 1). The highest values of total protein and serum GGT activity were observed between 24h and 36h of life and declined significantly at day 15. These values are related to the activity of intestinal absorption of the colostrum within the first 24 hours of life. Within the first hours of life occurs the largest absorption of immunoglobulins, which present a good correlation with the activity of GGT (Costa et al. 2008). Considering the values obtained in the first days of life (24-36h) and assuming the values of gamma globulin as a standard for comparison, there were high positive correlations between immunoglobulins and IgG (r=0.87 for CL and r=0.89 for BWH), PTS (r=0.91 for CL and r=0.92 for BWH) and Glob (r=0.99 for CL and r=0.98 for BWH), reinforcing earlier assertions that these variables are indicators of the transfer of passive immunity in calves (Naylor & Kronfeld 1977, Pfeiffer et al. 1977, Moraes et al. 1997, Feitosa et al. 2001a, Machado Neto et al. 2004, Costa et al. 2008). Although significant, the correlation between serum GGT activity and gamma globulin was weakly positive in the Criollo Lageano calves (r=0.14), but high in the Holstein calves(r=0.83). The correlation found in the Criollo Lageano contrasts with the observations of Fagliari et al. (1996) and Feitosa et al. (2001a). According to Borges (1997) and Costa et al. (2008) this may be due to the large variability observed in the values of serum enzyme activity and the fact that, starting at 24 hours of life, the decline of GGT activity anticipates the decline of concentration of gamma globulins. The closer to the 24 hours of life of the calves samples are collected, the stronger the correlation will be. In this study, similarly to what was reported by Costa et al. (2008) due to operational difficulties and because many births occurred at night, the collection of a large number of blood samples took place after the calves have completed 30 hours of age. For the Holstein calves due to the proximity of the pens to the property, sampling occurred closer to the 24 hours of age of calves, increasing the correlation. Feitosa et al. (2010) point out that using a specific value for any blood component, in order to establish whether a newborn calf is immunedeficient or not, one must be cautious. Moreover, it is important to note that the serum concentrations necessary to confer protection to newborn calves are influenced by various environmental factors, by the pathogen load to which the animals are exposed and by the concentration of specific immunoglobulins (Garry et al. 1993, Guy et al. 1994, Soares Filho et al. 2001, Feitosa et al. 2010).
CONCLUSIONS
It can be concluded that unlike the Black and White Holstein, there was no failure in the transfer of passive immunity in Criollo Lageano.
Variations of serum proteins followed a pattern of physiological behavior over the first six months of life and the active production of immunoglobulins appeared earlier in Holstein calves and later in the Criollo Lageano ones, without causing any health impact on the animals.
IgG values estimated by the zinc sulfate turbidity and by the total serum protein levels were good indicators of the transfer of passive immunity in calves between 24 and 36 hours of life.
Acknowledgements.- To the Brazilian Agricultural Research Corporation for financial support (Macro Programs 3). To Professors Mara Regina Stipp Balarin, Júlio Augusto Naylor Lisboa and to the Veterinarian Evandro Doine Vettorato, of the Laboratory of Clinical Pathology of the Londrina State University (UEL) for assistance in sample processing. To the Brazilian Criollo Lageano Cattle Breeders Association (ABCCL) and the owners of Bom Jesus do Herval Farm (Ponte Alta/SC), Grande Farm (Painel/SC), Canoas Farm (Ponte Alta/SC) and to the Veterinarian Fabrício Ventura. To the Agricultural Research and Rural Extension Corporation of Santa Catarina (EPAGRI), for providing the Holstein calves.
Received on February 15, 2012.
Accepted for publication on June 25, 2012.
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Publication Dates
-
Publication in this collection
24 Oct 2012 -
Date of issue
Oct 2012
History
-
Received
15 Feb 2012 -
Accepted
25 June 2012