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Título: | A quantitative study of enterotoxin production by sheep milk staphylococci |
Autor: | Bautista, L.; Gaya Sicilia, María Pilar; Medina, Milagros CSIC ORCID; Núñez Gutiérrez, Manuel | Fecha de publicación: | 1988 | Editor: | American Society for Microbiology | Citación: | Applied and Environmental Microbiology 54(2): 566-569 (1988) | Resumen: | Of 124 staphylococcal strains isolated from sheep milk, 78 produced enterotoxin A, B, C, or D when evaluated by an enzyme-linked immunosorbent assay. Enterotoxins A and D, elaborated by 44 and 43 strains, respectively, showed the highest incidence. Enterotoxin production by coagulase-negative strains (one Staphylococcus cohnii, three S. epidermidis, five S. haemolyticus, and four S. xylosus) was detected. Linear and logarithmic-logarithmic regressions of optical density on enterotoxin concentration yielded the best-fitting equations for enterotoxin quantitation. A significantly higher incidence of enterotoxin producers and significantly higher levels of enterotoxins produced were recorded for coagulase-positive, thermostable nuclease-positive, hemolysis-positive, or mannitol-positive strains. Mannitol utilization was the best test for discriminating between enterotoxigenic and nonenterotoxigenic staphylococci. | URI: | http://hdl.handle.net/10261/291847 | ISSN: | 0099-2240 | E-ISSN: | 1098-5336 |
Aparece en las colecciones: | (INIA) Artículos |
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