Data/hora: 11/06/2024 12:06:52

Provedor de dados: | Revista Brasileira de Zootecnia
País: | Brazil
Título: | Aerobic fungi in the rumen fluid from dairy cattle fed different sources of forage
Autores: | Almeida,Patrícia Natalicia Mendes de; Duarte,Eduardo Robson; Abrão,Flávia Oliveira; Freitas,Cláudio Eduardo Silva; Geraseev,Luciana Castro; Rosa,Carlos Augusto.
Data: | 2012-11-01
Ano: | 2012
Palavras-chave: | Dairy farming; Forage supplementation; Rumen microbiota; Semiarid; Tropical pasture; Yeast.
Resumo: | The objective of this study was to evaluate the aerobic microbiota of the rumen fluid from Holstein cows and heifers fed different tropical forage in the north of Minas Gerais, Brazil. A total of 30 samples of rumen fluid from cows fed with sorghum silage were collected: 32 from cows fed Brachiaria brizantha, 12 from heifers that received sorghum silage and 11 from calves fed sugar cane foliage. The culture was carried out using the agar Sabouraud medium and the solid C medium, containing microcrystalline cellulose. The isolated mycelial fungi were identified by microculture technique and yeasts by micromorphological and physical-chemical analysis. Specific identification for yeasts was confirmed by ribosomal DNA sequence analysis. The presence of fungal colonies was confirmed on the Sabouraud medium for 100% of the samples. No significant differences were observed comparing the concentrations of mycelia fungi in the rumen fluid from cows fed different forages and for the two categories evaluated, fed sorghum silage. Yeast populations in the rumen fluid from heifers fed sugarcane were higher compared with those receiving sorghum silage. The yeast Pichia kudriavzevii (Candida krusei) was the most frequent and among the mycelial fungi, the genus Aspergillus was the most frequently observed, corresponding to 56% of the samples. Future studies should elucidate the variations in the populations of these microorganisms considering the carbohydrate sources in the tropical forages and the animal categories. The ecological or pathogenic role of these microorganisms should also be considered, aiming at improved productivity and health of cattle.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100006
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982012001100006
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.41 n.11 2012
Fonte: | info:eu-repo/semantics/openAccess