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Coagulase-negative staphylococci in hematological malignancy
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- Ahlstrand, Erik, 1974- (author)
- Örebro universitet,Institutionen för hälsovetenskap och medicin
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- Söderquist, Bo, Professor (thesis advisor)
- Örebro universitet,Institutionen för läkarutbildning
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- Tidefelt, Ulf, Professor (thesis advisor)
- Örebro universitet,Institutionen för hälsovetenskap och medicin
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- Pauksens, Karlis, Docent (opponent)
- docent, överläkare, Inst f medicinska vetenskaper, Uppsala universitet samt Infektionskliniken Akademiska sjukhuset Uppsala
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(creator_code:org_t)
- ISBN 9789176689707
- Örebro : Örebro universitet, 2013
- English 56 s.
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Series: Örebro Studies in Medicine, 1652-4063 ; 95
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Abstract
Subject headings
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- Bacterial infections are common in hematological malignancy. Coagulase-negative staphylococci (CoNS) are among the most prevalent causes of bacteremia in patients with hematological malignancies.In this thesis, different aspects of CoNS in hematological malignancy have been studied in four papers:In paper 1, CoNS blood culture isolates from patients with hematological malignancies treated at the University Hospital of Örebro from 1980 to 2009 were revaluated for the presence of reduced sensitivity to glycopeptides. A high incidence of heterogeneous-intermediate glycopeptide resistance was observed and there was a trend towards increasing incidence of this phenotype over time.In paper 2, the colonization pattern of CoNS among patients undergoing intensive chemotherapy for hematological malignancy was investigated. A successive homogenization and an accumulation of CoNS phenotypes mutually present in a majority of included patients were demonstrated.In paper 3, a PCR method to determine the clinical significance of positive blood cultures of the CoNS species Staphylococcus epidermidis was evaluated. The test failed to discriminate bloodstream infection from blood culture contamination.Finally, in paper 4, the long-term molecular epidemiology of S. epidermidis blood culture isolates from patients with hematological malignancies was studied with multilocus sequence typing. A predominance of sequence type 2 was demonstrated during the entire 30 year study period.In conclusion, the results are consistent with that CoNS have established as important pathogens by its capacity to colonize the human skin, its ability to reside and spread in the hospital environment and its rapid adaptation to stressors such as antimicrobials.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Hematologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Hematology (hsv//eng)
Keyword
- coagulase-negative staphylococci
- hematological malignancy
- Staphylococcus epidermidis
- healthcare-associated infection
- antibiotic susceptibility
- molecular epidemiology
- bloddstream infection
- bacteremia
- Medicine
- Medicin
Publication and Content Type
- vet (subject category)
- dok (subject category)
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