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Bio-energetics Investigation of Candida albicans Using Real-time Extracellular Flux Analysis
Published on: March 19, 2019
Fungal infections in marrow transplant recipients under antifungal prophylaxis with fluconazole
J S R Oliveira1, F R Kerbauy, A L Colombo
1Disciplina de Hematologia e Hemoterapia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil. salvador@hemato.epm.br
Abstract:
Fungal infection is one of the most important causes of morbidity and mortality in bone marrow transplant (BMT) recipients. The growing incidence of these infections is related to several factors including prolonged granulocytopenia, use of broad-spectrum antibiotics, conditioning regimens, and use of immunosuppression to avoid graft-versus-host disease (GvHD). In the present series, we report five cases of invasive mold infections documented among 64 BMT recipients undergoing fluconazole antifungal prophylaxis: 1) A strain of Scedosporium prolificans was isolated from a skin lesion that developed on day +72 after BMT in a chronic myeloid leukemic patient. 2) Invasive pulmonary aspergillosis (Aspergillus fumigatus) was diagnosed on day +29 in a patient with a long period of hospitalization before being transplanted for severe aplastic anemia. 3) A tumoral lung lesion due to Rhizopus arrhizus (zygomycosis) was observed in a transplanted patient who presented severe chronic GvHD. 4) A tumoral lesion due to Aspergillus spp involving the 7th, 8th and 9th right ribs and local soft tissue was diagnosed in a BMT patient on day +110. 5) A patient with a history of Ph1-positive acute lymphocytic leukemia exhibited a cerebral lesion on day +477 after receiving a BMT during an episode of severe chronic GvHD. At that time, blood and spinal fluid cultures yielded Fusarium sp. Opportunistic infections due to fungi other than Candida spp are becoming a major problem among BMT patients receiving systemic antifungal prophylaxis with fluconazole.
Insights
Invasive mold infections pose a significant threat to bone marrow transplant (BMT) recipients. Fluconazole prophylaxis is insufficient against emerging fungal pathogens in these immunocompromised patients.
Area of Science:
- Mycology
- Hematology
- Transplant Medicine
Background:
- Fungal infections are a leading cause of morbidity and mortality in bone marrow transplant (BMT) recipients.
- Factors contributing to increased incidence include prolonged granulocytopenia, broad-spectrum antibiotics, conditioning regimens, and immunosuppression for graft-versus-host disease (GvHD).
Observation:
- This series reports five cases of invasive mold infections in 64 BMT recipients receiving fluconazole prophylaxis.
- Infections documented include Scedosporium prolificans, Aspergillus fumigatus, Rhizopus arrhizus (zygomycosis), Aspergillus spp., and Fusarium sp.
Findings:
- Invasive mold infections occurred despite fluconazole prophylaxis.
- Documented cases involved various fungal species and affected different sites, including skin, lungs, ribs, and brain.
- Specific cases highlight infections in patients with chronic myeloid leukemia, severe aplastic anemia, GvHD, and acute lymphocytic leukemia.
Implications:
- Opportunistic fungal infections beyond Candida are a growing concern in BMT patients on fluconazole.
- Current antifungal prophylaxis strategies may require re-evaluation for BMT recipients.
- Further research is needed to optimize antifungal management in this vulnerable population.
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