Related Experiment Video
Updated: Jun 20, 2026
13:24
An Optimized Enrichment Technique for the Isolation of Arthrobacter Bacteriophage Species from Soil Sample Isolates
Published on: April 9, 2015
19.8K
Optimizing bacteriophage screening and isolation methods for microbial samples derived from different body sites of
Gabriela Magossi1, Samat Amat1
1Microbiological Sciences Department, North Dakota State University, Fargo, ND.
Biorxiv : the Preprint Server for Biology
|July 9, 2025
Summary
Researchers isolated 83 bacteriophages from cattle, primarily targeting commensal bacteria. While effective against some bacteria, no phages were found against key bovine pathogens, highlighting a need for further research in phage therapy for cattle.
Area of Science:
- Bacteriophage research
- Animal health and nutrition
- Microbiome manipulation
Background:
- Bacteriophages (phages) show promise as alternatives to antibiotics and tools for microbiome modulation in cattle to improve health and feed efficiency.
- Current challenges include phage specificity, microbial ecosystem variability, and a lack of effective screening methods for cattle applications.
- Effective phage isolation and characterization are crucial for developing phage-based strategies in bovine health.
Purpose of the Study:
- To optimize phage screening methods for diverse cattle body sites.
- To isolate and identify lytic phages targeting key bovine pathogens and commensal bacteria.
- To characterize isolated phages and their corresponding bacterial hosts.
Main Methods:
- Screened 1,214 samples from cattle body sites and environmental sources using 13 distinct phage detection methods, including a high-throughput approach.
- Isolated 83 phages, with the majority originating from ruminal fluid and feces.
- Identified bacterial hosts, with Bacillus, Escherichia/Shigella, and Shouchella being the most frequently inhibited genera.
Main Results:
- Eighty-three phages were successfully isolated, primarily from ruminal fluid (59) and feces (15).
- The isolated phages inhibited bacteria from 29 genera, with Bacillus (34 isolates) being the most common target.
- Notably, no phages were identified against critical bovine pathogens such as Trueperella pyogenes, Mannheimia haemolytica, Pasteurella multocida, or Moraxella bovis.
Conclusions:
- Method 12 proved most efficient for phage recovery, especially from ruminal samples.
- The isolation of phages targeting commensal bacteria suggests potential for microbiome modulation to enhance cattle health and feed efficiency.
- Further research is essential to develop phages specifically targeting bovine pathogens for therapeutic applications.
Keywords:
Bacteriophagesantibiotic alternativebovine pathogenscattlecommensalsphage screening methodswhole-genome sequencing
