In general, most human individuals are thought to be colonized with a single strain of C. albicans that they acquired from their mothers [ 44].
Patients found to be colonized with either ESBL-EC or ESBL-KP are then managed with contact precautions in a single room.
FAQ # 12 Should contact precautions be used for all patients known to be colonized with MRSA?
All patients were known to be colonized with AB.
Bacteriological analysis revealed that all volunteers were colonized with a single S. aureus phenotype over time with the exception of individual A who carried a hemolytic and a non-hemolytic strain simultaneously at the second sampling (table 1).
It should be borne in mind that these findings relate to the adult CF population in Northern Ireland which is unique in that the majority of B. cepacia complex positive patients are colonized with a single strain (B. cenocepacia ET12).
In addition, the S. aureus found in subsequent nasal swabs from the same persons in our study belonged consistently to the same clone as the first cultured isolate, suggesting that these persons were colonized with a single clone each and that the hazard of picking one among several strains of S. aureus for PFGE typing was low.
Importantly, Treg induction within the host was diminished when mice were colonized with only a single strain from this Clostridia collection, as compared to animals colonized with over 15 different Clostridia strains.
Most (64%) study participants colonized with FQ-resistant E. coli harbored a single clonally related strain (clone A); 56% were colonized with strains other than clone A. Thus, the emergence of FQ-resistant E. coli colonization in this patient population appeared to arise from patient-to-patient spread as well as de novo resistance.
Among these patients, 261 patients were colonized or infected with a single VRE species (E. faecium, n = 258; E. faecalis, n = 3), and five patients were colonized with 2 VRE species (E. faecium, n = 5; E. faecalis, n = 4; E. raffinosus, n = 1).
