Animal Genetic Resistance
Mostrando 25-36 de 90 artigos, teses e dissertações.
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25. Genome scan for QTL related to bovine resistance to Boophilus microplus / Varredura genômica para QTL associados à resistência a Boophilus microplus em bovinos
In tropical countries losses caused by bovine tick infestation have a tremendous economic impact on production systems. Genetic variation between Bos taurus and Bos indicus to tick resistance and molecular biology tools might facilitate the use of molecular markers linked to resistance traits as an auxiliary tool in selection programs. The objective of this
Publicado em: 2006
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26. Resistência a antibióticos em bactérias comensais de bovino de leite / Antibiotic resistance in bacteria of dairy cattle
Neste trabalho, foram isoladas 97 bactérias do rúmen e 87 bactérias das fezes de três bovinos, alimentados com ração (24% proteína) e silagem de milho. A resistência dos isolados bacterianos aos antibióticos foi avaliada, por meio do método de diluição em agar, utilizando-se os seguintes antimicrobianos: ácido nalidíxico (NAL), ampicilina (AMP)
Publicado em: 2006
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27. Infestation of beef cattle females by Rhipicephalus (Boophilus) microplus, Haematobia irritans e Dermoatobia hominis. / Estudo da infestação de fêmeas bovinas de corte pelo Rhipichepalus (Boophilus) microplus, Haematobia irritans e Dermatobia hominis.
Em regiões de clima tropical, a resistência dos bovinos a ectoparasitas é fator importante na determinação da eficiência dos sistemas de produção. Os objetivos neste trabalho foram avaliar o grau de resistência de fêmeas Nelore (NE) e cruzadas Canchim x Nelore (CN), Aberdeen Angus x Nelore (AN) e Simental x Nelore (SN) de diversas idades ao carrapa
Publicado em: 2006
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28. Levels of metabolizable energy and crude protein in rations formulated according to the concept of ideal protein and phytase for piglets of 15 to 35 kg / NÃveis de energia metabolizÃvel e de proteÃna bruta em raÃÃes formuladas segundo o conceito de proteÃna ideal e fitase para leitÃes dos 15 aos 35 kg
Two experiments were conducted in the Swine Production Sector of the Animal Science Department at UFLA to verify by using the metabolism, performance assay, blood parameters and comparative slaughter, the effects of different levels of metabolizable energy (ME) and crude protein (CP) in rations formulated according to the ideal protein concept and phytase fo
Publicado em: 2006
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29. QTL mapping for tick resistence, birth weight and weight after sixty days on chromossome 23 from F2 design breeding of bovines Holstein x Gir. / Mapeamento de QTL para características de resistência a carrapato, peso ao nascimento e peso a desmama no cromossomo 23 de bovinos da geração F2, cruzamento Holandês x GIR.
A F2 design population had been developed from the breeding between four male holstein with twenty eight female Gir, generating a F1 with one hundred and fifty animals, from these sample four male have been chosen based on their fertility for matching. They have been breed with sixty eight females, producing the F2 generation with about four hundred individu
Publicado em: 2005
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30. Hunting expressed mammary gland genes related to mastitis in dairy cattle / Descobrindo genes expressos na glândula mamária e relacionados à ocorrência e controle da mastite bovina
Brazil is the largest cattle commercial herd in the world, mainly based in zebu (Bos indicus) with lower genetic potential than taurus-derived animals. Molecular genetics brought the possibility of better selection of animals for breeding, which increases production levels. The use of molecular methods for studying genetic variation is especially advantageou
Publicado em: 2003
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31. A malaria experimental por Plasmodium chabaudi chabaudi em camundongo SCID
The NK cells secrete the citoquinas INF-gamma and TNF-alpha - molecules associated with the immune protective mediated by cells of the type Th1 - in response to infection for Plasmodium. Instead the induction of these cells with IL- 12 helps to reduce the mortality by P. chabaudi. Although studies was related the NK cells and its citoquinas play a important
Publicado em: 2003
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32. Damage and biology of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: noctuidae) on maize genotypes. / Danos e biologia de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) em genótipos de milho.
Plant resistance is a usefui component of integrated pest management and its value has been increasing in plant breeding programs, ln this study, 12 maize genotypes were evaluated to damage of fali armyworm Spodoptera frugíperda (J.E. Smith, 1797) in field conditions. The effect of these genotypes on fali armyworm biology was evaluated in laboratory conditi
Publicado em: 2002
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33. Organization of the Antiseptic Resistance Gene qacA and Tn552-Related β-Lactamase Genes in Multidrug- Resistant Staphylococcus haemolyticus Strains of Animal and Human Origins
A part (12 kb) of a plasmid containing the β-lactamase genes of Tn552, the disinfectant resistance gene qacA, and flanking DNA has been cloned from a Staphylococcus haemolyticus isolate and sequenced. This region was used to map the corresponding regions in six other multiresistant S. haemolyticus isolates of human and animal origin. The organizations of th
American Society for Microbiology.
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34. Molecular Analysis of Tn1546 in Enterococcus faecium Isolated from Animals and Humans
The internal areas and the position of integration of the glycopeptide resistance element Tn1546 were characterized by using PCR fragment length polymorphism, sequencing, and DNA hybridization techniques with 38 high-level vancomycin-resistant Enterococcus faecium isolates of human and animal origins from Europe and the United States. Only minor variations i
American Society for Microbiology.
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35. High genetic homology between plasmids of human and animal origins conferring resistance to the aminoglycosides gentamicin and apramycin.
Escherichia coli and Salmonella strains resistant to gentamicin and apramycin were isolated from cattle in France and Belgium and from patients in hospitals. Homology between plasmids of both human and animal origins encoding aminoglycoside 3-N-acetyltransferase was revealed by digestion with several restriction endonucleases and confirmed by hybridization w
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36. Membrane mutants of animal cells: rapid identification of those with a primary defect in glycosylation.
Membrane mutants of animal cells have been isolated by several laboratories, using a variety of selection protocols. The majority are lectin receptor mutants arising from altered glycosylation of membrane molecules. They have been obtained by selection for resistance to cytotoxic plant lectins or by alternative protocols designed, in many cases, to isolate d