Results 111 to 120 of about 1,527 (165)
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American Journal of Veterinary Research, 1984
SUMMARY Moraxella bovis hemolysin was readily filterable through polycarbonate membrane filters, but not through nitrocellulose filters. The hemolysin was filterable through polycarbonate filters with pore diameters of ≥ 0.015 μm (apd). Of the hemolytic activity of cell-free filtrates, 74% could be pelleted by ultracentrifugation at 100,000 × g for 2½ ...
A G, Ostle, R F, Rosenbusch
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SUMMARY Moraxella bovis hemolysin was readily filterable through polycarbonate membrane filters, but not through nitrocellulose filters. The hemolysin was filterable through polycarbonate filters with pore diameters of ≥ 0.015 μm (apd). Of the hemolytic activity of cell-free filtrates, 74% could be pelleted by ultracentrifugation at 100,000 × g for 2½ ...
A G, Ostle, R F, Rosenbusch
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Hydrolytic enzymes of Moraxella bovis
Journal of Clinical Microbiology, 1981Certain strains of Moraxella bovis produce tissue-damaging enzymes which may initiate or potentiate infectious bovine keratoconjunctivitis. Thirteen reference strains of this species were characterized physiologically and screened for production of various enzymes by some conventional biochemical tests and the API ZYM system (Analytab Products ...
S K, Frank, J D, Gerber
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Characterization of the plasmids of Moraxella bovis
American Journal of Veterinary Research, 1989SUMMARY Restriction endonuclease digestions were performed on plasmids purified from Moraxella bovis isolates GRS, Newport, and IBH64. It was determined from single and double digestions of plasmid dna that GRS and Newport isolates carried 3 large plasmids having molecular sizes of 43.8, 41.3, and 32.8 kilobases (kb).
G R, Wilt, G, Wu, R C, Bird
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Extracellular Antigens of Moraxella bovis
American Journal of Veterinary Research, 1976SUMMARY The extracellular antigens of 2 isolates of Moraxella bovis were isolated by ammonium sulfate precipitation of cell-free culture filtrate, purified by filtration and differentiated by immunodiffusion and immunoelectrophoretic techniques. The extracellular filtrate from rough types had 2 specific extracellular antigens in addition to those in ...
T S, Sandhu, F H, White
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Antimicrobial susceptibility of Moraxella bovis
Veterinary Microbiology, 1998The antimicrobial susceptibility of 55 isolates of Moraxella bovis to seven antibiotics was evaluated by broth microdilution procedures. The isolates had an MIC90 of < or = 1 mg/l to erythromycin, ceftiofur, and ampicillin; 4 mg/l to tilmicosin; 16 mg/l to tylosin and gentamicin; and had MIC90s of > or = 32 mg/l for oxytetracycline.
T R, Shryock, D W, White, C S, Werner
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Immunogenicity of Moraxella bovis hemolysin
American Journal of Veterinary Research, 1985SUMMARY Anti-Moraxella bovis hemolysin activity was observed in 35 cattle exposed to field infections of infectious bovine keratoconjunctivitis (ibk). All cattle in infected herds seroconverted with respect to antihemolysin whether or not clinical ibk was noted.
A G, Ostle, R F, Rosenbusch
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Partial characterization of a Moraxella bovis cytolysin
Veterinary Microbiology, 1995Moraxella bovis (M. bovis) is the etiologic agent of infectious bovine keratoconjunctivitis and M. bovis hemolysin is believed to be an important virulence factor. Two strains of M. bovis were compared, Epp 63(300) (Epp), a known virulent and hemolytic strain, and IBH 63 (IBH), a known avirulent and nonhemolytic strain.
J T, Gray +2 more
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