Corynebacterium Bovis
Mostrando 13-24 de 45 artigos, teses e dissertações.
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13. Etiologia das infecções intramamárias em vacas primíparas ao longo dos primeiros quatro meses de lactação
De 88 vacas primíparas, oriundas de quatro rebanhos leiteiros, foram colhidas 1985 amostras de leite, ao longo dos 120 dias pós-parto, das quais 457 (23,02%) apresentaram resultados microbiológicos positivos. Os estafilococos coagulase negativos (ECN) foram isolados em 316 (69,14%) amostras, Corynebacterium bovis em 56 (12,25%), estreptococos em 41 (8,97%
Ciência Rural. Publicado em: 2001-12
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14. Controle da mamite subclínica de vacas em lactação através da antibioticoterapia
Neste trabalho foi avaliada a eficiência da antibioticoterapia como estratégia para o controle de mamite subclínica em vacas em lactação. Foram tratados 86 tetos infectados de 39 animais em três propriedades leiteiras, divididos em fases de lactação de 15 a 100 dias e 101 a 200 dias. Foram aplicadas, duas ou três doses de 250 mg de cefacetril sódic
Publicado em: 2000
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15. Susceptibilities of Corynebacterium bovis and Corynebacterium amylocolatum Isolates from Bovine Mammary Glands to 15 Antimicrobial Agents
Coryneform bacteria are frequently isolated from bovine mastitis and are associated with economic losses. Generally, the MICs of the 15 antimicrobial agents tested at which 90% of the isolates tested are inhibited for 46 Corynebacterium bovis and 13 Corynebacterium amylocolatum strains were low. These are the first quantitative antimicrobial susceptibility d
American Society for Microbiology.
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16. Characterization of strains of Corynebacterium bovis.
The biochemical and morphological characteristics of 104 strains of Corynebacterium bovis isolated from bovine milk samples and the C. bovis reference strain were found to be uniform. Valuable criteria for identification were presence of catalase and oxidase, production of acid from glucose and fructose and a requirement for enriched basal media. Six strains
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17. An observational study of Corynebacterium bovis in selected Ontario dairy herds.
An observational study of Corynebacterium bovis was conducted in 74 Ontario dairy herds. The levels of infection with C. bovis were 19.9, 36.2 and 85.6% at the quarter, cow and herd level, respectively. Teat disinfection was found to be the variable best able to distinguish between herds with a high or low C. bovis quarter infection rate. Mean total milk som
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18. The susceptibility of bovine udder quarters colonized with Corynebacterium bovis to experimental infection with Staphylococcus aureus or Streptococcus agalactiae.
Twenty bovine udder quarters colonized with Corynebacterium bovis SR6 and 20 uncolonized quarters were challenged by inoculation of Staphylococcus aureus Newbould 305 (ATCC 29740) into the teat cistern. The percentage of infection in quarters colonized with C. bovis (50%) was significantly lower than that in controls (100%). By similar challenge no significa
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19. Experimental colonization of the bovine teat duct with Corynebacterium bovis and the effect on milk somatic cell counts.
Colonization with Corynebacterium bovis was established in 59 of 64 (92%), 58 of 59 (98%) and 19 of 34 (56%) of uninfected bovine mammary quarters following inoculation of 83.3 X 10(4) colony-forming units (CFU) of the organism into the teat cistern, 4.7 X 10(3) CFU 5 mm into the teat duct or by exposure of the teat orifice to a milk culture containing 1.6 X
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20. Cell Wall Composition in Corynebacterium bovis and Some Other Corynebacteria
The cell wall compositions of two strains of Corynebacterium bovis were found to differ: one contained lysine, rhamnose, mannose, and glucose, the other meso-α, ε, diaminopimelic acid (DAP), arabinose, galactose, and mannose. The walls of a strain of C. nephridii were characterized by l-DAP and galactose. Those of a strain of C. paurometabolum and of two s
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21. Characteristics of Rare or Recently Described Corynebacterium Species Recovered from Human Clinical Material in Canada
Nineteen new Corynebacterium species or taxa described since 1995 have been associated with human disease. We report the characteristics of 72 strains identified as or most closely resembling 14 of these newer, medically relevant Corynebacterium species or taxa, as well as describe in brief an isolate of Corynebacterium bovis, a rare pathogen for humans. The
American Society for Microbiology.
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22. Lack of biological significance of in vitro Brugia malayi microfilarial cytotoxicity mediated by Propionibacterium acnes ("Corynebacterium parvum")-and Mycobacterium bovis BCG-activated macrophages.
The effect of nonspecific activation of host macrophages by Propionibacterium acnes ("Corynebacterium parvum") or Mycobacterium bovis BCG on Brugia malayi microfilariae was determined by in vitro and in vivo studies. Intraperitoneal injection of C. parvum or BCG stimulated peritoneal exudate cells, which were toxic to microfilariae. Microfilariae were equall
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23. Protein G-based enzyme-linked immunosorbent assay for anti-MPB70 antibodies in bovine tuberculosis.
MPB70 is a highly species specific protein which is secreted from Mycobacterium bovis during culture. To investigate whether antibodies against MPB70 can be used as an indicator of infection with M. bovis, an enzyme-linked immunosorbent assay was developed, based on the use of biotinylated protein G, to provide a common indicator for antibody formation in di
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24. Increased toxicity of endotoxin for tumor-bearing mice and mice responding to bacterial pathogens: macrophage activation as a common denominator.
Mice bearing the syngeneic SA-1 sarcoma or treated with live Mycobacterium bovis BCG or Formalin-killed Corynebacterium parvum acquired a greatly increased susceptibility to the lethal effects of endotoxin. In all three experimental models, the acquisition of increased sensitivity to endotoxin was concordant with the generation of a systemically activated ma