Animals Strains Selection
Mostrando 1-12 de 36 artigos, teses e dissertações.
1. Antibiotic resistance and integrons in Shiga toxin-producing Escherichia coli (STEC)
Shiga toxin-producing Escherichia coli (STEC) cause hemorrhagic colitis (HC) and hemolytic-uremic syndrome in humans (HUS). Cattle are the main reservoir of STEC and transmission to humans occurs through contaminated food and water. Antibiotics are used in pig production systems to combat disease and improve productivity and play a key role in the disseminat
Braz. J. Microbiol.. Publicado em: 2015-03
2. Caracterização molecular de rotavírus genotipo P de origem humana em um foco de diarreia neonatal suína
Neonatal diarrhea is the major piglet health problem in swine production systems worldwide.In intensive production the porcine serogroup A rotaviruses (PoRV-A) are common cause of diarrhea in suckling and recently weaned piglets. The VP4 and VP7 proteins of the outer layer viral capsid of RV-A are relevant for immunity against rotavirus infection by inducing
Publicado em: 2010
3. Strains selection and effect of temperature and food in the performance of Trichogramma galloi Zucchi, 1988 (Hymenoptera: Trichogrammatidae) for the control of Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) in corn / Seleção de linhagens e efeito da temperatura e do alimento no desempenho de Trichogramma galloi Zucchi, 1988 (Hymenoptera: Trichogrammatidae) para o controle de Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) em milho
O objetivo da presente pesquisa foi fornecer subsídios, visando ao controle de Diatraea saccharalis (Fabricius, 1794) em milho, com o parasitóide de ovos Trichogramma galloi Zucchi, 1988. Foram realizados estudos do parasitóide, incluindo seleção de linhagens, efeito de fatores abióticos (temperatura e alimento) sobre parâmetros biológicos e de paras
Publicado em: 2009
4. Grafts of supplementary thymuses injected with allogeneic pancreatic islets protect nonobese diabetic mice against diabetes
In nonobese diabetic (NOD) mice, the autoimmune attack of the β-cells in pancreatic islets is now believed to result from abnormal thymic selection. Accordingly, grafts of thymic epithelium from NOD donors to athymic recipients promote autoimmune islet inflammation in normal strains, and intrathymic islet grafts decrease the incidence of disease in NOD anim
The National Academy of Sciences.
5. Emergence of Resistance to Cefamandole: Possible Role of Cefoxitin-Inducible Beta-Lactamases
Selection of resistance to cefamandole has been observed, and the drug has failed to protect animals lethally infected with certain Enterobacteriaceae that appeared to be highly susceptible in vitro. Using spectrophotometric assays, some of these organisms were found to produce beta-lactamases highly active against cefamandole. Cefoxitin, a poor enzyme subst
6. Abnormal T cell selection on nod thymic epithelium is sufficient to induce autoimmune manifestations in C57BL/6 athymic nude mice
To investigate the role of primary T cell repertoire selection in the immunopathogenesis of autoimmune diseases, pure thymic epithelium (TE) from nonobese diabetic (NOD) embryos was grafted into non autoimmune prone newborn C57BL/6 athymic mice. The results show that NOD TE selects host T cell repertoires that establish autoimmunity in otherwise nondiabetic
The National Academy of Sciences of the USA.
7. Selection of Resistant Streptococcus pneumoniae during Penicillin Treatment In Vitro and in Three Animal Models
Pharmacokinetic (PK) and pharmacodynamic (PD) properties for the selection of resistant pneumococci were studied by using three strains of the same serotype (6B) for mixed-culture infection in time-kill experiments in vitro and in three different animal models, the mouse peritonitis, the mouse thigh, and the rabbit tissue cage models. Treatment regimens with
American Society for Microbiology.
8. Single and Combination Antibiotic Therapy of Staphylococcus aureus Experimental Endocarditis: Emergence of Gentamicin-Resistant Mutants
The efficacy of nafcillin and gentamicin used alone and in combination at doses giving serum concentrations comparable to those achieved in patients was studied in rabbits with experimental Staphylococcus aureus endocarditis. The organism used was a penicillinase-producing, methicillin-susceptible, clinical isolate. The addition of gentamicin to nafcillin si
9. Is there a role for lactobacilli in prevention of urogenital and intestinal infections?
This review describes the importance of microbial adhesion in the ecology of the urogenital and intestinal tracts and the influence of host and microbial factors in bacterial interference. In a recent revival of interest in bacterial interference, lactobacillus administration has been studied as a means of treating and preventing disease. Although evidence i
10. Genetic Variability of the β-Tubulin Genes in Benzimidazole-Susceptible and -Resistant Strains of Haemonchus Contortus
Benzimidazole anthelmintics are the most common chemotherapeutic agents used to remove intestinal helminths from farm animals. The development of drug resistance within helminth populations is wide-spread and can render these drugs essentially useless. The mechanism of benzimidazole resistance appears to be common to many species ranging from fungi to nemato
11. Effect of Tetracycline on Transfer and Establishment of the Tetracycline-Inducible Conjugative Transposon Tn916 in the Guts of Gnotobiotic Rats
We have investigated the transfer of Tn916 among strains of Enterococcus faecalis OG1 colonizing in the intestines of gnotobiotic rats. This animal model allows a low limit of detection and efficient colonization of the chosen bacteria. The animals continuously received tetracycline in drinking water. A tetracycline-sensitive recipient strain was allowed to
American Society for Microbiology.
12. Identification of a Major Locus Contributing to Erythrocyte 2,3-Diphosphoglycerate Variability in Hooded (Long-Evans) Rats
The erythrocyte glycolytic intermediate 2,3-diphosphoglycerate (DPG) and adenosine triphosphate (ATP) play an important role in oxygen transport and delivery by binding to hemoglobin (Hb) and reducing its affinity for oxygen. Considerable quantitative variability in the levels of DPG and ATP exists in human populations and in a population of hooded (Long-Eva