Transplant Infectious Disease最新文献

Background: Treatment strategies for BK polyomavirus (BKPyV) infection in kidney transplant recipients are heterogeneous among clinicians. We aimed to identify the treatment preferences of key stakeholders for BKPyV infection and measure the trade-offs between treatment outcomes.

Methods: Adult kidney transplant recipients, caregivers, and clinicians were eligible to participate in a discrete choice experiment between February 2021 and June 2022. The five treatment-related attributes were achieving viral clearance and optimal graft function, as well as reducing the risk of graft loss, acute rejection, and complications. Results were analyzed using multinomial logistic models.

Results: In total, 109 participants (57 kidney transplant recipients, 10 caregivers, and 42 health professionals) were included. The most important attribute was the risk of graft loss, followed by side effects and acute rejection. As the risk of graft loss increased, all participants were less inclined to accept an assigned treatment strategy. For instance, if graft loss risk was increased from 1% to 50%, the probability of uptake of a treatment strategy for BKPyV infection was reduced from 87% to 3%.

Conclusion: Graft loss is the predominant concern for patients, caregivers, and health professionals when deciding on the treatment for BKPyV infection, and should be included in intervention trials of BKPyV infection.

Background: Cytomegalovirus (CMV) is a significant cause of morbidity and mortality in solid organ transplant recipients (SOTRs). Secondary prophylaxis (SP) is not routinely recommended by guidelines on the management of CMV in SOTR but may be considered in certain higher-risk situations.

Methods: A comprehensive search of English language publications up to September 2023 was performed. The primary outcome was CMV relapse, defined as the recurrence of DNAemia or disease. Secondary outcomes included graft loss, mortality, and hematological toxicity. Meta-analysis used the random-effects model. The study protocol is registered in PROSPERO (no. CRD42022357028).

Results: Six retrospective comparative studies were included. A total of 520/727 (72%) of SOTR received SP with valganciclovir. The meta-analysis did not demonstrate a significant difference in CMV relapse (odds ratio [OR] 1.15, 95% confidence interval [CI] 0.79-2.63). Heterogeneity between the studies was low (I² = 0%, p = 0.57). SP was significantly associated with a reduction in mortality (OR 0.2, 95% CI 0.07-0.54) but not graft loss (OR 0.67, 0.17-2.63). There was no significant difference in CMV relapse among kidney-specific SOTR (OR 1.38, 95% CI 0.65-2.96).

Conclusion: Evidence from six nonrandomized studies is limited and cannot support a recommendation for or against routine SP in SOTR treated for CMV infection. Awaiting prospective-controlled trials, the decision about SP should depend on individualized risk-profile assessments by experienced clinicians.

Background: The European Union encompasses 30 outermost and overseas countries and territories (OCTs). Despite a recent increasing activity of renal transplantation in these territories, many patients still undergo transplantation in continental Europe, with follow-up care coordinated between health professionals from both their transplant center and their home region. Each territory has its unique infectious epidemiology which must be known to ensure appropriate care for kidney transplant recipients (KTRs).

Aims: This paper proposes a pragmatic approach to optimize pre-transplant check-up and to provide an overview of the specific epidemiological features of each region. It offers practical algorithms to help practitioners in managing infected KTR living in these territories. This work advocates for increased collaborative research among European OCTs.

Background: Development of brain abscess following solid organ transplantation is associated with significant morbidity and mortality. We undertook a descriptive study to evaluate the etiology, clinical manifestations, diagnosis, management, and outcomes of brain abscess in solid organ transplant (SOT) recipients at three major transplant centers in the United States.

Methods: This is a retrospective study of adults with brain abscess following SOT between January 2000 and June 2021 at Mayo Clinic sites in Arizona, Minnesota, and Florida.

Results: A total of 39 patients were diagnosed with a brain abscess following SOT. The most common pathogens were Nocardia sp. (24 cases, 61.5% [Nocardia farcinica, 37.5%]), followed by fungi (12 cases, 30.7% [Aspergillus sp., 83.3%]). The majority were kidney transplant recipients (59%). Median time to brain abscess diagnosis was 1.3 years (range, 29 days-12 years) after SOT; 10 of 12 patients (83%) with fungal brain abscess were diagnosed within 1 year after SOT. Twelve patients underwent brain biopsy for diagnosis (25% Nocardia vs. 50% fungal), eight (20.5%) underwent surgical resection of the abscess, and 31 (79.5%) received antimicrobial therapy alone. Median time to brain abscess resolution was 166 days for Nocardia and 356 days for fungal pathogens. Eleven of 39 patients (28.2%) died as a result of their brain abscess, including four of 24 patients (16%) with Nocardia and six of 10 patients (60%) with Aspergillus brain abscess. All-cause mortality was 43.6%.

Conclusion: Brain abscess remains an uncommon infectious complication following SOT. Nocardia and fungi accounted for 92% of pathogens in our cohort. Fungal brain abscess portends a poor prognosis.

Background: Hematopoietic cell transplant (HCT) survivorship care includes recommendations for post-HCT revaccination to restore immunity to vaccine-preventable diseases (VPDs). However, not all survivors agree to be vaccinated. No existing studies have comprehensively reported barriers and facilitators to adult HCT survivors completing revaccination.

Methods: A cross-sectional survey of 194 adult HCT survivors was analyzed using convergent mixed methods. The analysis used various statistical methods to determine the prevalence of barriers and facilitators and the association between revaccination and the number and specific type of barriers and facilitators. Content analysis was applied to open-ended item responses. Integrated analysis merged quantitative and qualitative findings.

Results: The most frequent barriers included the inability to receive live vaccines because of immunosuppression, identifying a suitable community location for administering childhood vaccines to adults, and delayed immune recovery. The most frequent facilitators were having healthcare insurance and a clear calendar of the revaccination schedule. Complete revaccination rates were lower with each additional reported barrier (OR = 0.58; 95% CI 0.459-0.722) and higher with each additional reported facilitator (OR = 1.31; 95% CI 1.05-1.63). Content analysis suggested that most barriers were practical issues. One significant facilitator highlighted by respondents was for the transplant center to coordinate and serve as the vaccination location for revaccination services. Merged analysis indicated convergence between quantitative and qualitative data.

Conclusion: Practical barriers and facilitators played a consequential role in revaccination uptake, and survivors would like to be revaccinated at the transplant center.

Introduction: Vancomycin-resistant Enterococci (VRE) infections cause significant morbidity and mortality in liver transplant (LT) recipients. Management is challenging, especially in the setting of daptomycin resistance (DR).

Methods: Single-center retrospective review of patients who underwent LT between January 1, 2020, and December 31, 2022, and developed VRE infections. Descriptive statistics were used and Kaplan-Meier curves estimated freedom from treatment failure and survival.

Results: Forty-two patients (median age 58; 64% female; 67% white) were included. Alcohol-related cirrhosis (48%) and metabolic dysfunction-associated steatohepatitis (31%) were the most common indications for LT, and most were from deceased donors (86%). VRE infection occurred at a median of 21 days after LT, and 16% had known prior VRE colonization. Common infection sites were blood (45%, n = 19), intraabdominal (36%, n = 15), and urine (36%, n = 15). Most were initially treated with daptomycin alone (64%) or in combination with other agents (21%); 7% received linezolid alone. Twelve (29%) developed breakthrough infections during treatment and 11 (26%) had recurrent infections after discontinuation of treatment. All-cause mortality was 36% (n = 15) at a median of 90 days after VRE infection diagnosis and was nearly twice as high in patients with DR (63%).

Conclusion: VRE infection in LT recipients relapsed or recurred in over 25%. Mortality was high, especially in cases with DR. More data is needed to establish an optimal treatment approach, particularly for relapse and DR.

Background: Previous studies showed HIV-negative immunocompromised patients are susceptible to Pneumocystis pneumonia (PCP). However, the PCP outcome has not been compared among HIV-negative immunocompromised patients.

Methods: In this retrospective cohort study at the University Health Network, we included all HIV-negative immunocompromised patients who fulfilled the European Organization for Research and Treatment of Cancer (EORTC) PCP diagnosis criteria from December 2018 to December 2019. We compared the demographics, comorbidities, course of illness, and PCP outcome (28-day mortality and composite outcome [i.e., death or intensive care unit (ICU) admission]) between solid organ transplant (SOT) and non-SOT patients.

Results: Of 160 non-HIV patients with PCP diagnoses, 118 patients fulfilled EORTC criteria (76 males [64.4%], median [range] age: 65.5 [21-87] years). PCP presentation in SOT recipients (n = 14) was more severe than non-SOT patients (n = 104): acute presentation (onset <7 days before admission: 11/14 [78.6%] vs. 51/104 [56%], p = .037), shortness of breath (100% vs. 75/104 [74.3%], p = .037), median [range] O₂ saturation (88% [75%, 99%] vs. 92%[70%, 99%], p = .040), and supplemental O₂ requirement (12/14 [85.7%] vs. 59/104 [56.7%], p = .044). The mortality [4/14, (28.6%) vs. 15/104 (14.4%), p = .176], ICU admission (10/14 [71.4%] vs. 18/104 [17.3%], p < .0001), and mechanical ventilation (8/14 [57.1%] vs. 18/104 [17.3%], p = .0007) in SOT patients was different from non-SOT patients. In multivariable analysis, SOT recipients were at greater risk of composite outcome than non-SOT patients (aOR [CI95%]: 12.25 [3.08-48.62], p < .001).

Conclusion: PCP presentation and outcomes in SOT recipients are more severe than in non-SOT patients. Further studies are required to explore the biological reasons for this difference.