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  • Title: Bloodstream infections in organ transplant recipients receiving alemtuzumab: no evidence of occurrence of organisms typically associated with profound T cell depletion.
    Author: Silveira FP, Marcos A, Kwak EJ, Husain S, Shapiro R, Thai N, McCurry KR, Abu-Elmagd K, Paterson DL.
    Journal: J Infect; 2006 Oct; 53(4):241-7. PubMed ID: 16403576.
    Abstract:
    BACKGROUND: Alemtuzumab is a humanized monoclonal antibody directed against CD52, a cell surface antigen expressed on B and T lymphocytes, monocytes and NK cells. Its use results in a profound decrease in CD4 positive T lymphocytes. Alemtuzumab is used as induction immunosuppression and therapy for rejection in organ transplant recipients in some centers. We followed a cohort of 449 consecutive transplant recipients who received alemtuzumab to determine the occurrence of bloodstream infections, particularly those previously associated with decrease in CD4 positive T lymphocytes. PATIENTS AND METHODS: Fifteen percent (69/449) patients had at least one episode of bloodstream infection. However, no patient had bacteremia with Streptococcus pneumoniae, Listeria monocytogenes, non-typhoidal Salmonella or Mycobacterium avium complex. Fungaemia was rare, occurring in 1.5% of patients. The most common organisms isolated from the blood were Staphylococcus aureus (21 episodes), coagulase negative Staphylococcus (14 episodes), Klebsiella pneumoniae (12 episodes), Enterococcus faecium (11 episodes), Pseudomonas aeruginosa (10 episodes), Enterococcus faecalis (9 episodes) and Escherichia coli (7 episodes). DISCUSSION: We conclude that although alemtuzumab use is associated with profound CD4 positive T lymphocyte depletion, alemtuzumab does not seem to be associated with an increased risk of bloodstream infection with pathogens typically seen in other disorders of CD4 cell depletion, such as acquired immunodeficiency syndrome.
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