This study reports on the capacity of actinomycete strains isolated from Cuban soils to produce antifungal agents. The antimicrobial activities were determined by susceptibility disk assay methods. We isolated 563 different actinomycetes and 286 produced compounds with antifungal activity. Our screening method indicated the presence of many possible polyene macrolide antibiotics and the important antifungal activity in the soils rich in minerals.
We report in this study the frequency of Streptomyces strains to produce macrolide‐lincosamide‐streptogramin (MLS) antibiotics isolated from Cuban soils. The screening assay is based on the induction of MLS‐resistance phenotype in a clinical isolated strain of Staphylococcus aureus S‐18. Our results suggest that of 800 Streptomyces strains isolated from different soil samples, 6% were positives in the screening test used. The ferralitic red soil from Pinar del Río (north) provided the major percentage (3·6%) of MLS producing strains. The other soil samples tested belonging to Guira de Melena and Bauta in Havana, Matanzas City, Topes De Collantes (Villa Clara), and Soroa Mountains (Pinar del Rio) hill reached very low percentages.
El objetivo fue identificar y contar la población de nematodos gastrointestinales (NGI) en un centro de producción ovina en Atlapexco, Se realizó un estudio coprológico mediante la técnica de McMaster, a 42 ovinos de raza Dorper, en los meses de septiembre a noviembre de 2017. Se efectuó estadística descriptiva a las variables evaluadas (identificación y conteo de NGI, edad de los animales) con el STATISTICA® V 7.1. Los géneros de helmintos encontrados fueron Trichostrongylus spp., Trichurys spp. y Moniezia spp. Se encontró que los ovinos mayores a 12 meses presentaron mayor carga de parásitos, la cual fue de 4742.8, mientras que los ovinos de menor a 6 meses de edad tuvieron 3800.0 NGI y los de 6-11 meses fue de 2561.1 NGI. La identificación y el número de NGI presentes en los ovinos nos permitirán tomar decisiones preventivas para reducir cargas parasitarias en ovinos Dorper.
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