Abstract Objective To synthesize and critically evaluate the scientific evidence from observational studies on biosurveillance systems and adverse event reporting in organ donation and transplantation. Methods Systematic review of observational studies following the recommendations of the Methodological Guidelines (REBRATS) and Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA). Primary studies and case reports on biosurveillance and/or adverse events in organ donation and/or transplantation, without restriction of publication date or language were included. Six electronic databases were used in the scientific literature search: Medical Literature Analysis and Retrieval System Online (MEDLINE) (via PubMed), Excerpta Medica Database (Embase), Web of Science, LILACS, Scopus and the electronic library Scielo. A data search was also performed in the following secondary databases: Notify - World Health Organization (WHO), Pan American Health Organization (PAHO) and Google Scholar. The MINORS tool was used to assess the quality of studies. Results 551 studies were identified, and after the evaluation steps, eight of them were included in the systematic review. These were divided into results, processes and strategies for preventing adverse events. Regarding the classification of the quality of studies, two obtained a good classification. Conclusion The results indicate the occurrence of adverse events at some stage of the organ and tissue donation and transplantation process, such as: adverse drug-related reactions; neurotoxicity; longer length of hospital stay; surgical reinterventions; falls; coma; death; graft failure or loss. The fact that adverse events are possibly still underreported is noteworthy.

Resumen Objetivo Sintetizar y evaluar críticamente las evidencias científicas provenientes de estudios observacionales sobre sistemas de biovigilancia y notificación de eventos adversos en la donación y trasplante de órganos. Métodos Revisión sistemática de estudios observacionales guiada por las recomendaciones de las Directrices Metodológicas (REBRATS) y Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA). Se incluyeron estudios primarios y relatos de caso realizados sobre biovigilancia o eventos adversos en la donación o trasplante de órganos, sin restricción de fecha de publicación o idioma. Se utilizaron seis bases de datos electrónicas para realizar las búsquedas en la literatura científica: Medical Literature Analysis and Retrieval System Online (MEDLINE) (via PubMed), Excerpta Medica Database (Embase), Web of Science, LILACS, Scopus y la biblioteca electrónica Scielo. También se realizó la búsqueda de datos en las siguientes bases secundarias: Notify - World Health Organization (WHO), Organización Panamericana de la Salud (OPS) y Google Scholar. Para evaluar la calidad de los estudios se utilizó la herramienta MINORS. Resultados Se identificaron 551 estudios y, luego de las etapas de evaluación, se incluyeron ocho en la revisión sistemática, que fueron divididos entre resultados, procesos y estrategias de prevención de eventos adversos. Respecto a la clasificación de la calidad de los estudios, dos obtuvieron una clasificación buena. Conclusión Los resultados indican casos de eventos adversos ocurridos en alguna etapa del proceso de donación y trasplante de órganos y tejidos, como: reacciones adversas relacionadas con medicamentos, neurotoxicidad, aumento del tiempo de hospitalización, reintervenciones quirúrgicas, caída, coma, fallecimiento, falla o pérdida del injerto. Se destaca que los eventos adversos probablemente aún son subnotificados.

Resumo Objetivo Sintetizar e avaliar criticamente as evidências científicas oriundas de estudos observacionais sobre sistemas de biovigilância e notificação de eventos adversos na doação e transplante de órgãos. Métodos Revisão sistemática de estudos observacionais seguindo as recomendações das Diretrizes Metodológicas (REBRATS) e Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA). Foram incluídos estudos primários e relatos de caso conduzidos sobre biovigilância e/ou eventos adversos na doação e/ou transplante de órgãos, sem restrição de data de publicação ou idioma. Foram utilizadas seis bases de dados eletrônicas para a realização das buscas na literatura científica: - Medical Literature Analysis and Retrieval System Online (MEDLINE) (via PubMed), Excerpta Medica Database (Embase), Web of Science, LILACS, Scopus e a biblioteca eletrônica Scielo. Realizou-se também busca de dados nas seguintes bases secundárias: Notify - World Health Organization (WHO), Organização Pan-Americana de Saúde (OPAS) e Google Scholar. Para a avaliação da qualidade dos estudos foi utilizada a ferramenta MINORS. Resultados Foram identificados 551 estudos, após as etapas de avaliação, foram incluídos oito deles para a revisão sistemática. Estes foram divididos entre resultados, processos e estratégias de prevenção de eventos adversos. Quanto a classificação da qualidade dos estudos, dois obtiveram classificação boa. Conclusão Os resultados apontam a ocorrência de eventos adversos ocorridos em alguma etapa do processo de doação e transplante de órgãos e tecidos, como: reações adversas relacionadas a medicamentos; neurotoxicidade; aumento do tempo de hospitalização; reintervenções cirúrgicas; queda; coma; óbito; falha ou perda do enxerto. Destaca-se que os eventos adversos possivelmente ainda são subnotificados.

ABSTRACT This report shows the contribution of next-generation metagenomic sequencing (mNGS) as an alternative to challenging diagnostic infection in immunosuppressed individuals. Herein, we report three acute leukemia patients who developed severe invasive infections due to different etiologies: fungi, viruses, and protozoa. mNGS improved the diagnosis of the infections and provided the opportunity for adequate therapy. The mNGS is a hypothesis-free diagnostic platform, increasing potential in challenging diseases in hematological patients due to the extended diagnostic panel and the expedite access to the result.

Human immunodeficiency virus (HIV) infection was considered a contraindication for solid organ transplantation (SOT) in the past. However, HIV management has improved since highly active antiretroviral therapy (HAART) became available in 1996, and the long-term survival of patients living with HIV has led many transplant programs to reevaluate their policies regarding the exclusion of patients with HIV infection. Based on the available data in the medical literature and the cumulative experience of transplantation in HIV-positive patients at our hospital, the aim of the present article is to outline the criteria for transplantation in HIV-positive patients as recommended by the Immunocompromised Host Committee of the Hospital das Clínicas of the University of São Paulo.

OBJECTIVES: Hyperinfection or disseminated strongyloidiasis has been frequently reported after transplants and is related to high mortality. This study aimed to screen for strongyloidiasis using serological diagnoses in transplant candidates. METHODS: An ELISA test was performed with filariform larvae of Strongyloides venezuelensis as a source of antigen. RESULTS: In the serum from transplant candidates, anti-Strongyloides IgG antibodies were detected in 35/150 (23.3%) samples by soluble fractions in phosphate buffered saline (PBS), 31/150 (20.7%) samples by soluble fractions in Tris-HCl, 27/150 (18.0%) samples by membrane fractions in PBS and 22/150 (14.7%) samples by membrane fractions in Tris-HCl. CONCLUSIONS: The present results suggest the ELISA test, ideally using soluble fractions of filariform larvae S. venezuelensis in PBS, as an additional strategy for the diagnosis of strongyloidiasis in transplant candidates.

Abstract Objectives: This study aimed to verify the presence of polyomavirus BK (BKPyV) in the saliva of kidney transplant recipients and to correlate it with blood viremia. Material and Methods: We have conducted a cross-sectional study with a sample involving 126 renal transplant recipients. 126 samples of saliva and 52 samples of blood were collected from these patients. Detection and quantification of BKPyV were performed using a real-time PCR. To compare the presence of BKPyV in blood and saliva, the binomial proportion test was used. To verify associations between salivary shedding BKPyV and post-transplant periods (in months), the Mann-Whitney test was used. Spearman's correlation was used to correlate the viral load in the saliva with blood of kidney transplant recipients. Results: The mean age of the study group was 51.11±12.45 years old, and 69 participants (54.8%) were female, with a mean post-transplantation time of 4.80±6.04 months. BKPyV was quantified in several samples of saliva and blood, with medians of 1,108 cp/mL and 1,255 cp/mL, respectively. Only 16/52 (30.8%) participants presented BKPyV in blood, and 59/126 (46.8%) excreted the virus in saliva (p=0.004). BKPyV shedding was found in patients at a shorter post-transplantation period (3.86±5.25, p=0.100). A weak correlation was observed between viral quantification in saliva and blood (Spearman's correlation coefficient=0.193). Conclusion: The results of this study suggested that, although saliva excretes more BKPyV than blood, there is no reliable correlation between salivary shedding and blood viremia, showing two independent compartments of viral replication.

Cytomegalovirus infection is a frequent complication after transplantation. This infection occurs due to transmission from the transplanted organ, due to reactivation of latent infection, or after a primary infection in seronegative patients and can be defined as follows: latent infection, active infection, viral syndrome or invasive disease. This condition occurs mainly between 30 and 90 days after transplantation. In hematopoietic stem cell transplantation in particular, infection usually occurs within the first 30 days after transplantation and in the presence of graft-versus-host disease. The major risk factors are when the recipient is cytomegalovirus seronegative and the donor is seropositive as well as when lymphocyte-depleting antibodies are used. There are two methods for the diagnosis of cytomegalovirus infection: the pp65 antigenemia assay and polymerase chain reaction. Serology has no value for the diagnosis of active disease, whereas histology of the affected tissue and bronchoalveolar lavage analysis are useful in the diagnosis of invasive disease. Cytomegalovirus disease can be prevented by prophylaxis (the administration of antiviral drugs to all or to a subgroup of patients who are at higher risk of viral replication) or by preemptive therapy (the early diagnosis of viral replication before development of the disease and prescription of antiviral treatment to prevent the appearance of clinical disease). The drug used is intravenous or oral ganciclovir; oral valganciclovir; or, less frequently, valacyclovir. Prophylaxis should continue for 90 to 180 days. Treatment is always indicated in cytomegalovirus disease, and the gold-standard drug is intravenous ganciclovir. Treatment should be given for 2 to 3 weeks and should be continued for an additional 7 days after the first negative result for viremia.

Epstein-Barr virus (EBV)-related post-transplant lymphoproliferative disease (PTLD) is one of the most serious complications associated with solid organ and hematopoietic stem cell transplantation. PTLD is most frequently seen with primary EBV infection post-transplant, a common scenario for pediatric solid organ recipients. Risk factors for infection or reactivation of EBV following solid organ transplant are stronger immunosuppressive therapy regimens, and being seronegative for receptor. For hematopoietic stem cell transplantation, the risk factors relate to the type of transplant, human leukocyte antigen disparity, the use of stronger immunosuppressants, T-cell depletion, and severe graft-versus-host disease. Mortality is high, and most frequent in patients who develop PTLD in the first six months post-transplant. The primary goal of this article is to provide an overview of the clinical manifestations, diagnosis, accepted therapies, and management of EBV infection in transplant recipients, and to suggest that the adoption of monitoring protocols could contribute to a reduction in related complications.