Consulta: subjectFacets:"Passive immunity"
Registros recuperados: 2
Data/hora: 05/06/2024 13:46:49

Colostral immunoglobulins absorption in Canchim and Nelore calves
Provedor de dados: 96
Autores: Machado Neto,Raul; Packer,Irineu Umberto; Prado,Gladys Villas Boas do; Bessi,Rosana; Pauletti,Patricia.
The efficiency of absorption of colostral immunoglobulins was evaluated in five Canchim and seven Nelore calves. They received colostrum pools with concentration of 70.20 ± 6.14 mg/mL through esofageal feeder at 2, 12, 24 and 36 hours after birth. The immunoglobulins concentrations of the pools were estimated through specific gravity and measured by radial immunodifusion. In the blood collection at birth and during the first 70 days of life, the total protein was assayed by biuret method and the immunoglobulins were assayed by radial immunodifusion. Data were analysed as a randomized split-plot statistical model. The highest concentrations of serum immunoglobulins and total protein were observed at 24 hours of age. No significant differences (P&gt;0.5484)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibodies; Colostrum; Newborn calves; Passive immunity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982004000600021

Relationship between passive immunity and morbidity and weight gain in dairy cattle
Provedor de dados: 65
Autores: Moraes,Mauro Pires; Weiblen,Rudi; Rebelatto,Marlon Cesar; Silva,Adriana Moraes da.
Serum samples from 87 calves from a dairy herd in Southern Brazil were collected to determine the levels of passive transfer and its relationship to morbidity and mean daily weight gain (MDG). Serum immunoglobulin (Ig) levels were measured by the zinc sulfate turbidity test at 24 hours of age in the calves. The average serum Ig level was 11.40g/l. Fourteen out of 87 calves (16.1%) showed serum Ig levels one standard deviation below the mean (4.59g/l) and were considered as having failure of passive immunity transfer (FPT). The occurrence of diarrhea from birth to weaning was higher in the FPT group (100%) than the normal group (90.7%) but the difference was not significant. The occurrence of signs of respiratory disease was similar in both groups (35.7%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passive immunity; Calves; Morbidity.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782000000200017