Publications by authors named "Ricardo La Hoz"

The prevalence of donor-derived Bartonella quintana infection poses an emerging issue in solid organ transplantation. Further studies are needed to validate criteria for donor screening to prevent transmission without negatively affecting organ utilization.

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Background: In the phase 3 SOLSTICE study (NCT02931539), maribavir was superior to investigator-assigned therapy (IAT) for confirmed cytomegalovirus viremia clearance at study week 8 in hematopoietic cell/solid organ transplant (HCT/SOT) recipients. We report additional efficacy and safety analyses from the SOT subgroup.

Methods: Eligible SOT recipients (n=211) received maribavir 400 mg twice daily (n=142) or IAT (n=69) for 8 weeks (12 weeks' follow-up).

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Background: Donor screening and antimicrobial management processes are inconsistent across organ procurement organizations (OPOs) and transplant centers. As part of a Controversies Conference addressing the evaluation and management of infectious diseases (ID) in deceased donors sponsored by the American Society of Transplantation (AST), two online pre-meeting surveys were developed to inform conference proceedings and assess current practices and opinions on donor screening and antimicrobial management.

Methods: Survey 1 addressed the current state of deceased donor ID testing, culture data communication, antimicrobial utilization, and involvement of transplant ID during donor management and was distributed to all 56 United States OPOs.

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Background: The purpose of this study was to understand how transplant infectious disease (TID) physicians assess a potential donor with known or suspected infection and describe posttransplant management.

Methods: We designed a survey of 10 organ offer scenarios and asked questions pertaining to organ acceptability for transplantation and management posttransplant. The survey was distributed to TID clinicians via transplant society listservs and email.

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The Disease Transmission Advisory Committee (DTAC) of the Organ Procurement and Transplantation Network focuses on issues related to the transmission of disease through organ transplantation. Providing a review of potential cases of transmission, translating aggregate data into actionable education and guidance for the transplant community, and providing input for policy development, DTAC aims to improve the safety of organ transplantation through a reduction in donor-derived transmission events. Through its nearly 20-year history, DTAC has provided education, guidance, and policy, addressed numerous emerging infections, and continuously focused on the community's understanding of risk assessment related to donor-derived transmission.

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Sodium-glucose cotransporter 2 inhibitors (SGLT2is) improve clinical outcomes in persons with heart failure (HF). This class of agents has been consistently associated with an increased risk of mycotic genital infections (MGIs), and in some, but not all trials, urinary tract infections (UTIs). Other medications widely used for cardiac conditions do not cause MGIs and UTIs, so cardiologists and their supporting teams will be encountering clinical questions that they previously did not have to address.

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Pretransplant mortality rates in the US remain high and are connected to effective organ donation and utilization. Thus, there is a need to maximize the utilization of available donors. In some cases, this has been safely achieved using organs from donors with infectious complications.

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The number of transplant infectious disease (TID) fellowship programs has expanded rapidly in the past 5 years, with the creation of many new programs and the expansion of training tracks and dedicated years as the demand for TID physicians grows drastically. This editorial focuses on major factors and complexities that programs should consider in TID fellowship creation, as well as highlighting examples of formative experiences, programmatic structure, and fellow resources that trainees can use to identify their desired career path in TID.

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Patients can be immunocompromised from a diverse range of disease and treatment factors, including malignancies, autoimmune disorders and their treatments, and organ and stem-cell transplantation. Infections are a leading cause of morbidity and mortality in immunocompromised patients, and the disease treatment landscape is continually evolving. Despite being a critical but preventable and curable adverse event, the reporting of infection events in randomised trials lacks sufficient detail while inconsistency of categorisation and definition of infections in observational and registry studies limits comparability and future pooling of data.

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Article Synopsis
  • A recent study examined the use of PASA16 phage therapy in 16 patients with stubborn Pseudomonas aeruginosa infections, highlighting the largest compassionate-use series of its kind.
  • The phages were administered either intravenously or topically, showing good results in 13 out of 15 cases, with only minor side effects reported.
  • The findings suggest that combining PASA16 with traditional antibiotics is a promising option for patients who haven't responded to standard treatments, paving the way for future clinical trials.
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Herein, we review the current knowledge of donor-derived disease and current US Organ Procurement and Transplantation Network policies to minimize the risk. During the process, we also consider actions to further mitigate the risk of donor-derived disease. The overarching goal is to provide an infectious disease perspective on the complex decision of organ acceptance for transplant programs and candidates.

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Background: Decisions to transplant organs from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acid test-positive (NAT+) donors must balance risk of donor-derived transmission events (DDTE) with the scarcity of available organs.

Methods: Organ Procurement and Transplantation Network (OPTN) data were used to compare organ utilization and recipient outcomes between SARS-CoV-2 NAT+ and NAT- donors. NAT+ was defined by either a positive upper or lower respiratory tract (LRT) sample within 21 days of procurement.

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Article Synopsis
  • * The clinical symptoms associated with the Omicron infection were more severe compared to the Delta infection, raising concerns about its impact on lung transplant patients.
  • * The study calls for further investigation into the effects of new COVID-19 variants on lung transplant patients and suggests keeping a cautious approach until more data is available.
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Purpose Of The Review: This review examines the most recent literature on the epidemiology and treatment of Chagas Disease and the risk of Chagas Disease Reactivation and donor-derived disease in solid organ transplant recipients.

Recent Findings: Chagas disease is caused by infection with the parasite Trypansoma cruzi . In nonendemic countries the disease is seen primarily in immigrants from Mexico, Central America and South America where the disease is endemic.

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Background: There are limited data regarding the clinical efficacy of COVID-19 vaccines among lung transplant (LT) patients.

Methods: We included all LT patients diagnosed with COVID-19 between March 1, 2020, and December 10, 2021 (n = 84; median age 55, range, 20-73 years; males 65.5%).

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Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is transmissible through lung transplantation, and outcomes among infected organ recipients may be severe. Transmission risk to extrapulmonary organ recipients and recent (within 30 days of transplantation) SARS-CoV-2-infected recipient outcomes are unclear.

Methods: During March 2020-March 2021, potential SARS-CoV-2 transmissions through solid organ transplantation were investigated.

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Objective: In this study, we aim to assess short-term allograft outcomes following deceased donor kidney transplantation from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) lower respiratory tract (LRT) nucleic acid testing (NAT) positive donors.

Methods: From September to December 2021, SARS-CoV-2 NAT positive organ donors, whose solid abdominal organs were transplanted at our academic medical center were identified. Donors were stratified into having tested positive for SARS-CoV-2 in an upper respiratory tract (URT) or LRT sample.

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