Early Weanling
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Milk protein and supplemental zinc in weaned pigs diets / Proteína láctea e zinco suplementar em dietas de leitões recém-desmamados
Foram utilizados 120 leitões (60 em cada experimento) da genética Dalland, desmamados aos 21 dias de idade e pesos médios iniciais de 5,43 kg ± 0,46 (Exp. 1) e 5,81 kg ± 0,54 (Exp. 2) com o objetivo de avaliar a presença de proteína láctea ou zinco suplementar (Znaminoácidos) sobre o desempenho, concentrações sanguíneas de IGF-I, GH, zinc
Publicado em: 2007
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2. Produção e avaliação de plasma bovino desidratado como ingrediente de rações de leitões desmamados precocemente. / Production and evaluation of plasma dehydrated as an ingredient in cattle rations of early weaners.
The objective of this work was to obtain spray dried bovine plasma (SDBP) and to compare it with a commercial one (CSDBP) as feed ingredients of weanling pigs (weaned at 21 days of age) based on performance, blood and plasma components, liver and spleen glutathione levels, small intestine morphology and diarrhea score. Blood of healthy bovines was collected
Publicado em: 2006
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3. Vaccinia virus meningitis in mice after intracerebral inoculation.
The pathogenesis of experimental vaccinia virus infection in weanling mice after intracerebral inoculation was followed with virological, histological, and immunohistological methods. High-dose inoculation, virus spread from brain to thoracic and abdominal viscera probably by an undetected early viremia. Virus did rise to detectable levels in blood by day 5
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4. Spontaneous expression of C-type virus in DBA/2 mice is associated with an increased rate of mortality, independent of neoplastic disease.
Ecotropic C-type retroviruses isolated from both normal and dimethylbenzanthracene-treated DBA/2 mice could be classified into three major groups, Ea, Eb, and Ec, that differed in structure and biology. Weanling DBA/2 mice were generally free of viruses, but a fraction of adult individuals became virus positive and were apparently selectively associated with
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5. Experimental rabies in skunks: mechanisms of infection of the salivary glands.
Striped skunks (Mephitis mephitis) were inoculated into the right submandibular salivary gland with street rabies virus. They were killed at various times after inoculation and several tissues were examined by immunofluorescence and light microscopy. Right and left superior cervical, nodose and trigeminal ganglia, medulla oblongata and at least three regions
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6. Body weight and food intake at early estrus of rats on a high-fat diet.
Body weight, food intake, and age at vaginal opening and estrus were studied for two groups of weanling rats (age 21 days), fed on high-fat (24.6% by weight) and low-fat (5.0%) diets. Fat was substituted isocalorically for carbohydrate in the high-fat diet. The high-fat rats had estrus at 33.3 +/- 0.8 days, significantly earlier (P less than 0.001) than the
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7. Immunocytochemical study of the ontogeny of Peyer's patches in the Brazilian marsupial Didelphis albiventris.
A detailed ontogenetic immunocytochemical study is reported on gut-associated lymphoid development in the Brazilian marsupial Didelphis albiventris. This employed antibody probes raised to evolutionarily conserved peptides which have been shown to detect HLA-DR-like (class II MHC) antigens and T and B cell markers in a wide range of animal species. Cells wit
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8. Genetic determinants of Sindbis virus neuroinvasiveness.
After peripheral inoculation of mice, Sindbis virus replicates in a variety of tissues, leading to viremia. In some cases, the virus can enter the central nervous system (CNS) and cause lethal encephalitis. The outcome of infection is age and virus strain dependent. Recently, two pairs of Sindbis virus variants differing in neurovirulence and neuroinvasivene
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9. COLORADO TICK FEVER VIRUS IN CELL CULTURE I. : Cell-Type Susceptibility and Interaction With L Cells1
Trent, Dennis W. (University of Oklahoma School of Medicine, Oklahoma City) and L. Vernon Scott. Colorado tick fever virus in cell culture. I. Cell-type susceptibility and interaction with L cells. J. Bacteriol. 88:702–708. 1964.—Colorado tick fever (CTF) virus was serially propagated in monolayer cultures of L and FL cells. Early passages of virus in FL
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10. Semliki Forest Virus Neurovirulence Mutants Have Altered Cytopathogenicity for Central Nervous System Cells
We have analyzed the pathogenicity and host range properties of four neurovirulence mutants of Semliki Forest virus which, unlike the wild type (WT), allow the survival of weanling mice injected intraperitoneally with 102 PFU. The mutant M9 showed a sustained multiplication in the brains of infected mice. It produced paralysis in 35%, and 8% died. Demyelinat
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11. A Single Amino Acid Change in nsP1 Attenuates Neurovirulence of the Sindbis-Group Alphavirus S.A.AR86
S.A.AR86, a member of the Sindbis group of alphaviruses, is neurovirulent in adult mice and has a unique threonine at position 538 of nsP1; nonneurovirulent members of this group of alphaviruses encode isoleucine. Isoleucine was introduced at position 538 in the wild-type S.A.AR86 infectious clone, ps55, and virus derived from this mutant clone, ps51, was si
American Society for Microbiology.
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12. Mechanisms involved in protection provided by immunization against core lipopolysaccharides of Escherichia coli J5 from lethal Haemophilus pleuropneumoniae infections in swine.
In an investigation of the potential protective effects of immunity against common lipopolysaccharide core antigens of gram-negative bacteria during a severe gram-negative infection in the natural host, we induced Haemophilus pleuropneumoniae infections in weanling pigs immunized with a vaccine of an Rc mutant of Escherichia coli (strain J5). To help define