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Published on: January 27, 2021
Demonstration of two cryptic plasmids in Salmonella pullorum MS53
Journal of Bacteriology
|May 1, 1972
Abstract:
Two cryptic plasmids designated PO-1 and PO-2 that had molecular weights of 1.5 x 10(6) and 45 x 10(6) daltons, respectively, were isolated from Salmonella pullorum MS53. A 150 to 1 ratio of PO-1 to PO-2 plasmids was estimated to occur.
Insights
Researchers identified two cryptic plasmids, PO-1 and PO-2, in Salmonella pullorum MS53. These plasmids, with distinct molecular weights, were found in a significant ratio, offering insights into bacterial genetics.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Salmonella pullorum is a significant pathogen in poultry.
- Understanding the genetic elements of bacterial pathogens is crucial for developing control strategies.
- Cryptic plasmids can influence bacterial phenotype and evolution.
Purpose of the Study:
- To isolate and characterize cryptic plasmids from Salmonella pullorum MS53.
- To determine the molecular weights and relative abundance of these plasmids.
Main Methods:
- Isolation of plasmids from Salmonella pullorum MS53.
- Estimation of plasmid molecular weights.
- Quantification of relative plasmid ratios.
Main Results:
- Two cryptic plasmids, designated PO-1 and PO-2, were successfully isolated.
- PO-1 has a molecular weight of 1.5 x 10^6 daltons; PO-2 has a molecular weight of 45 x 10^6 daltons.
- A high ratio of PO-1 to PO-2 plasmids (approximately 150:1) was observed.
Conclusions:
- Salmonella pullorum MS53 harbors at least two distinct cryptic plasmids.
- The significant difference in molecular weight and abundance between PO-1 and PO-2 suggests different roles or replication mechanisms.
- Further research is warranted to investigate the functional significance of these plasmids in Salmonella pathogenesis.
