Transplant Infectious Disease最新文献

Background: Trimethoprim-sulfamethoxazole prophylaxis effectively prevents opportunistic and non-opportunistic infections in kidney transplantation, but optimal duration remains uncertain. This study investigated whether extending TMP-SMX prophylaxis is associated with lower infection rates.

Methods: This target trial emulation using observational data from the Swiss Transplant Cohort Study compared short (< 7 months) versus long (≥ 7 months) TMP-SMX prophylaxis. The primary outcome was bacterial infection potentially susceptible to TMP-SMX up to 12-months post-transplant. Inverse probability weighting (IPW) adjusted for confounders including age, living donation, lymphocyte counts, use of antithymocyte globulin, acute rejection, CMV infection, and transplant center. All bacterial and opportunistic infections, kidney function, and patient and allograft survival were summarized descriptively.

Results: A total of 1700 KTRs fulfilled inclusion criteria; 1325 (78%) participants received a short prophylaxis and 375 (22%) received a long prophylaxis. Median TMP-SMX duration was 179 days in the short group and 280 days in the long group. At 12-month post-transplant, the primary outcome was observed in 120/1325 (9.1%) in the short group and 43/375 (11.5%) in the long group. IPW analysis estimated an adjusted risk difference of 2.11% (95% CI -0.47% to 5.27%). Center, rejection, and use of ATG were associated with longer TMP-SMX duration, but risk difference was similar before and after weighting. Urinary tract infection was the most common bacterial infection. Opportunistic and overall infection rates, kidney function, and patient and graft survival were similar among groups.

Conclusions: In this target trial emulation, no differences in bacterial infection rates at 12-month post-transplant was observed between short and long TMP-SMX prophylaxis.

Trimethoprim/sulfamethoxazole (TMP/SMX) prophylaxis can prevent Pneumocystis jirovecii pneumonia (PJP) and other opportunistic infections (OI). We sought to assess the frequency, causative factors, and impact of early TMP/SMX discontinuation in abdominal solid organ transplant (SOT). This is a single-center, retrospective cohort study of abdominal SOT recipients at Mayo Clinic Arizona (MCA) between January 2021 and June 2023. Primary study goals were to determine the rate and reasons behind early TMP/SMX discontinuation and whether TMP/SMX prophylaxis was reinitiated. Secondary outcomes included mean duration of therapy, alternative prophylactic agent utilized, and incidence of TMP/SMX-preventable OI. A total of 930 abdominal SOT recipients were included (592 kidney, 253 liver, 85 multiorgan transplants). TMP/SMX was discontinued early in 184 (20%) patients: 77 kidney, 84 liver, 23 multiorgan. Predominant reasons for discontinuation were hyperkalemia (39%) and cytopenias (35%). Median duration of TMP/SMX prophylaxis before discontinuation was 54.5 (18.0, 93.2) days. TMP/SMX was not resumed in 62% of cases (36% kidney, 89% liver, 52% multi-organ). The predominant reason for non-resumption was alternative prophylaxis with no clear intent to rechallenge TMP/SMX (70%). Alternative prophylaxis included pentamidine (43%), none (30%), dapsone (22%), and atovaquone (5%). Of patients reinitiated, 86% (59/69) successfully remained on TMP/SMX through the prophylaxis period. One TMP-SMX-preventable OI (nocardiosis) was observed in the TMP/SMX discontinuation group. TMP/SMX is often discontinued prematurely in SOT recipients without resumption despite resolution of the offending cause. TMP/SMX prophylaxis should be maintained where possible, as alternative therapy may not offer the same broad spectrum of protection against OI.

Background: Updated benchmark data on invasive fungal disease (IFD) in solid organ transplantation (SOT) and hematopoietic cell transplantation (HCT) recipients are necessary to increase clinical recognition and inform treatment and prevention strategies. We estimated IFD incidence and potential risk factors in transplant recipients in a large US commercial health insurance database.

Methods: We observed patients who received SOT or HCT during 2018-2022 until IFD development, disenrollment, or database end date (July 31, 2023). We calculated incidence (per 1000 person-years) and time to IFD development, comparing demographic features and underlying conditions for IFD versus non-IFD patients.

Results: Overall, 9143 patients received an SOT (5667 kidney, 2025 liver, 759 heart, 650 lung, 39 pancreas, 3 intestine), and 5693 patients received an HCT (3519 autologous, 2114 allogeneic, 60 unspecified type). Among SOT patients, 360 developed an IFD (incidence: 21.0 [per 1000 person-years]). Mold infections had the highest incidence (7.1), followed by unspecified mycoses (3.9) and endemic mycoses (3.3). Among HCT patients, 292 developed an IFD (incidence: 28.5), with higher incidence among allogeneic (58.4) versus autologous (12.8) HCT recipients; among all HCT recipients, unspecified mycoses had the highest incidence (8.3), then pneumocystosis (7.6), and mold infections (6.7). Median time to IFD was 173.5 days for SOT recipients and 197.5 days for HCT recipients. IFD risk varied substantially by transplant type, region, and certain underlying conditions.

Conclusion: Our results suggest that IFDs remain an important cause of infection among SOT and HCT recipients, particularly later in the posttransplant period, and highlight the need for prevention strategies.

The case discussed involves a 41-year-old Italian man who was a candidate for chimeric antigen receptor T-cell therapy (CAR-T) for mediastinal diffuse large B-cell lymphoma. His CAR-T treatment was postponed several times due to prolonged relapsing COVID-19 and new onset of pulmonary Mycobacterium tuberculosis diseases. After 11 weeks of antimycobacterial treatment, CAR T-cell therapy was performed, but complicated by cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS). Two months after CAR-T, the patient developed invasive pulmonary aspergillosis due to A. fumigatus. He was successfully treated with a 6-month course of antitubercular therapy and an 8-month course of antifungal therapy with isavuconazole. Lobectomy was performed due to episodes of severe hemoptysis. The challenging issues of diagnosis, choice, and management of treatments, including drug-drug interactions and length of therapy, are discussed.