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Related Experiment Videos

Colonization priority among Staphylococcus aureus strains--correlation with phage-type.

V T Rosdahl1, H Laursen, M W Bentzon

  • 1Staphylococcus Laboratory, Hvidovre Hospital, Copenhagen, Denmark.

The Journal of Hospital Infection
|October 1, 1988
PubMed
Summary
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Staphylococcus aureus strains were studied in burn patients. Certain phage types, like type 95, show high colonization priority and recurrence, suggesting their frequent occurrence is due to strong colonization ability.

Area of Science:

  • Microbiology
  • Epidemiology

Background:

  • Staphylococcus aureus is a significant pathogen, particularly in healthcare settings like burn units.
  • Understanding the dynamics of S. aureus strain distribution and colonization is crucial for infection control.

Purpose of the Study:

  • To investigate the distribution and recurrence patterns of Staphylococcus aureus phage types in burn unit patients.
  • To identify specific S. aureus strains with high colonization priority.

Main Methods:

  • Phage-typing of Staphylococcus aureus strains isolated from sequential patient swabs.
  • Analysis of strain recurrence and replacement over observation periods.
  • Comparison of recurrence rates for different phage types, including epidemic strains.

Main Results:

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  • The same phage type persisted in 51 patients, while new types were introduced in 20, and strains were replaced in 23 patients.
  • Strains of phage type 95 demonstrated high colonization priority, and group III strains showed low priority.
  • Recurrence of the same phage type was observed in 70% of patients when comparing the first and fourth samples.
  • Epidemic strains (phage type 95 and the 94,96 complex) exhibited high recurrence rates (over 80% for adjacent samples, 68-69% for first/fourth samples).

Conclusions:

  • Specific Staphylococcus aureus strains, particularly epidemic types like 95 and the 94,96 complex, possess superior colonization capacities.
  • This enhanced colonization ability likely contributes to their frequent prevalence in clinical settings, even with limited antibiotic resistance.