Screening and Evaluation of the Ruminal Cellulolytic Bacteria and Their Potential Application As Probiotics

Overview

Journal Iran J Microbiol

Publisher Tehran University of Medical Sciences

Specialty Infectious Diseases

Date 2024 Jul 15

PMID 39005608

Authors

Seyyed Ehsan Ghiasi

Maryam Gheibipour

Hossein Motamedi

Mudasir A Dar

Affiliations

Soon will be listed here.

Abstract

Background And Objectives: Rumen microbiologists are looking for new probiotics to improve the digestibility of livestock diets. This study intended to screen and evaluate the ruminal cellulolytic bacteria (CBs) and their potential application as probiotics.

Materials And Methods: Microbial culture and molecular techniques performed to isolate CBs from the rumen of camels, deer and rams. Their antibacterial and antibiogram tests were done using disc diffusion method. Their potential to degrade cellulose, starch, tannin and protein were investigated using clear zone halo, and spectrophotometric techniques. Bilious, saline, and acidic broth media were used to study the resistance of isolates in intestinal conditions.

Results: The phylogenetic analysis revealed that the strains belonged to Firmicutes and Proteobacteria phyla, and . The highest cellulase (CAS) activity was recorded by Dez wildlife13A (2.98 UmL), whereas Loot desert 111A (1.14 Uml) was produced the lowest enzyme. The isolates were highly resistant to synthetic conditions of intestine (pH 2.5-3.5, bile 0.3-2%), as well as tolerated higher concentrations of NaCl (up to 10%). They effectively inhibited standard pathogen strains, and showed sensitivity to the used antibiotics.

Conclusion: This study reports the cellulolytic Tabbas desert 32A for the first time from the rumen, which will have potential biotechnological applications.

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