Phage typing of Klebsiella strains in epidemiological studies

B Byczyńska1, A Przondo-Mordarska, J Kurlenda

  • 1Department of Microbiology, Medical Academy, Wrocław.

Insights

Bacteriophage typing of Klebsiella pneumoniae and Klebsiella oxytoca revealed distinct lysotypes specific to different locations and time periods between 1983-1986. This study highlights geographic and temporal variations in these bacterial strains.

Area of Science:

  • Microbiology
  • Bacteriology
  • Epidemiology

Background:

  • Klebsiella pneumoniae and Klebsiella oxytoca are significant opportunistic pathogens.
  • Bacteriophage typing is a method for differentiating bacterial strains.
  • Understanding strain diversity is crucial for infection control.

Purpose of the Study:

  • To characterize Klebsiella pneumoniae and Klebsiella oxytoca strains using bacteriophage typing.
  • To investigate geographic and temporal variations in lysotypes.

Main Methods:

  • Utilized a set of 14 routinely applied bacteriophages.
  • Performed phage typing on Klebsiella strains isolated from patients between 1983 and 1986.
  • Analyzed strain sensitivity and lysotype distribution.

Main Results:

  • 65% of isolated strains were sensitive to the applied bacteriophages.
  • Distinct lysotypes were identified in Wrocław, Gdańsk, Wernigerode, and Włocławek.
  • Lysotype patterns showed variations over the 10-year study period.

Conclusions:

  • Bacteriophage typing effectively differentiated Klebsiella strains.
  • Geographic location and isolation time influenced the occurrence of specific lysotypes.
  • The findings provide insights into the epidemiology of Klebsiella infections.

Related Concept Videos

Lytic Cycle of Bacteriophages01:30

Lytic Cycle of Bacteriophages

Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the lytic replication...
Lysogenic Cycle of Bacteriophages00:43

Lysogenic Cycle of Bacteriophages

In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
Methods of Classification and Identification01:28

Methods of Classification and Identification

Bacterial identification relies on a diverse array of techniques to classify and understand microorganisms, each tailored to uncover specific characteristics. Traditional morphological approaches, while still valuable, are limited for closely related or structurally simple organisms. Modern methods integrate biochemical, serological, genetic, and advanced molecular tools to achieve greater accuracy.Morphological and Biochemical TechniquesMorphological characteristics, such as cell shape and...
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...