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[Subtyping of Salmonella enteritidis using a new phage typing protocol]
R Alonso1, A Echeita, M A Usera
1Servicio de Bacteriología, Instituto de Salud Carlos III, Majadahonda, Madrid.
Enfermedades Infecciosas Y Microbiologia Clinica
|April 1, 1994
Summary
New bacteriophages enhance Salmonella Enteritidis subtyping. This improved phage-typing method offers greater discriminatory power for Salmonella Enteritidis isolates compared to previous techniques.
Area of Science:
- Microbiology
- Virology
- Epidemiology
Context:
- Salmonella Enteritidis infections have risen significantly in Spain since 1982.
- Existing phenotypic subtyping methods lack sufficient discriminatory power.
- Alonso's phage-typing method requires enhancement for better resolution.
Purpose:
- To develop novel bacteriophages for improved Salmonella Enteritidis phage-typing.
- To increase the discriminatory power of existing subtyping schemes.
Summary:
- Wild and lysogenic bacteriophages were isolated and selected based on stability, reproducibility, and discriminatory potential.
- Seven wild and two lysogenic bacteriophages were identified.
- A new phage-typing scheme was developed, resulting in ten described phage-types.
Impact:
- The new phage-typing scheme demonstrates superior discriminatory power compared to Alonso's method, as indicated by Simpson's index of diversity.
- Further validation against molecular subtyping methods is recommended to establish its utility as a complementary marker.