O efeito de probióticos fúngicos adicionados a uma dieta rica em grãos no trato gastrointestinal de ovinos
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Data
2022-03-21
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Universidade Federal de Goiás
Resumo
This study aimed to evaluate the microbiological and physicochemical characteristics of the ruminal fluid and histological
characteristics of the gastrointestinal tract (GIT) of sheep on a high-grain diet containing the probiotic fungi Aspergillus terreus and
Rhizomucor spp. The study included four treatment groups (without probiotic, with Rhizomucor spp., with Aspergillus terreus, and
with a mixture of both fungi), and two types of corn (ground/whole), in a Completely Randomized Design (CRD) arranged in 4 x
2 factorial design. Santa Inês x Dorper lambs were housed in eight pens with five lambs each for 75 days. Rumen fluid was collected
to study the rumen microbiological profile, macroscopic characteristics, ammonia nitrogen concentration, and microbiological
activity. In addition, GIT samples were taken for histological analysis. Fluid analyses showed that the animals presented a low
acidosis index. The samples presented a predominantly aromatic odor and blackish-brown color, indicating a neutral pH and high
microbial activity. The rumen pH differed (P < 0.05) according to the level of processed corn consumed, being higher for ground
grain corn (GGC). There was no difference for any of the microbiological communities analyzed (P > 0.05) (Lac+ and Lac- bacteria,
fungi, yeasts, and protozoa). Six genera of facultative anaerobic fungi were identified in 15 observations. Cladosporium spp. was
the most prevalent genus (46.66%), followed by Aspergillus spp. (26,66%). The width of the base of rumen papillae showed
significant correlation being greater for GCG (P < 0.05) with Rhizomucor and for the control (P < 0.05). The rumen fluid of sheep
on a high-grain diet with added Aspergillus terreus and Rhizomucor spp. showed no microbiological and physicochemical changes.
Descrição
Palavras-chave
Bactéria ruminal, Microbiota ruminal, Pequenos ruminantes, Protozoários, Rúmen, Rumen bacteria, Rumen microbiota, Protozoa, Small ruminants
Citação
FABIANO NETO, Ronaildo; PESSOA, Flávia Oliveira Abrão; SILVA, Thiago Dias; MIYAGI, Eliane Sayuri; SANTANA NETO, Victor Vieira; GODOY, Marcelo Marcondes de; LIMA, Danne Kelle Siqueira; SILVA, Jose Roberto de Moura; BRAINER, Mônica Maria de Almeida. O efeito de probióticos fúngicos adicionados a uma dieta rica em grãos no trato gastrointestinal de ovinos. Ciência Animal Brasileira, Goiânia, v. 23, n. 1, e70905P, 2022. Disponível em: https://www.revistas.ufg.br/vet/article/view/70605.