Hepatosplenic involvement of tuberculosis: an uncommon presentation that demands attention in specific scenarios.

Abdominal tuberculosis (TB), a potential differential diagnosis for acute and chronic abdomen, should be considered in specific situations, such as immunosuppressant or biological drug use, HIV, or in patients residing in endemic areas. Although the presence of thoracic tuberculosis may indicate abdominal TB, only 15% of patients with abdominal TB have evidence of pulmonary disease. Involvement of the liver and spleen is a common autopsy finding in patients with disseminated TB. However, the most common pattern is of fine miliary lesions. Hepatic involvement with a macronodular pattern, a rare occurrence, is linked to dissemination through the portal vein. The splenic macronodular form, an extremely rare presentation, can manifest as solitary or multiple nodules, oval or round, with a variable appearance reflecting different stages of the disease, adding to the uniqueness of this case.

Six-year experience with GM test in hematological patients in a public Brazilian tertiary hospital.

Invasive fungal infection (IFI) is frequent in patients with hematologic malignancies or submitted hematopoietic stem cell transplantation (HSCT). OBJECTIVES: To evaluate the role of the GM (galactomannan) test in prescribing therapeutic antifungals; to determine invasive aspergillosis (IA) frequency, the factors associated with positive GM test, and the in-hospital mortality. METHODS: We conducted a retrospective observational study including patients aged 18 or over with hematological malignancy or submitted to HSCT. GM test was measured twice weekly. The hypothesis of IFI was considered in patients with neutropenia and persistent fever despite broad-spectrum antibiotics. RESULTS: A total of 496 patients were evaluated; the mean of GM tests performed per patient was 4.2 (+3.1), and 86 (17.3 %) had positive results. IFI was diagnosed in 166 (33.5 %) and IA in 22 (24.6 %) patients. Positive GM test was more frequent in patients with IFI (72.2 % and 25.1 %; OR 8.1; 95 % CI 4.8 - 13.8), and was associated with therapeutic antifungals prescription (52, 9 % and 20.5 %; OR 4.3, 95CI% 2.0 - 9.4), as well as lung abnormalities on HRCT (45.3% vs. 21.5 %; OR 3.0, 95 %CI 1.4 - 6.5). Mortality was 31.6 %. In the multivariate analysis, the variables associated with mortality were the hypothesis of IFI (OR 6.35; 95 % CI 3.63-11.12.0), lung abnormalities on HRCT (57.9 % and 26.9 %; OR 2 0.6; 95 % CI 1.5 - 4.4), and positive GM test (57.9 % and 26.9 %; OR 2.7 95 % CI 1.6 - 4.5). CONCLUSIONS: Positive GM test was associated with lung abnormalities on HRCT and with the introduction of therapeutic antifungals. If adequate anti-mold prophylaxis is available, the GM test should not be used as screening, but to investigate IFI in high-risk patients. The diagnosis of IFI, positive GM test and lung abnormalities on HRCT were predictors of hospital mortality in patients with hematological malignancies or undergoing HSCT.

Six-year experience with GM test in hematological patients in a public Brazilian tertiary hospital

Abstract Invasive fungal infection (IFI) is frequent in patients with hematologic malignancies or submitted hematopoietic stem cell transplantation (HSCT). Objectives To evaluate the role of the GM (galactomannan) test in prescribing therapeutic antifungals; to determine invasive aspergillosis (IA) frequency, the factors associated with positive GM test, and the in-hospital mortality. Methods We conducted a retrospective observational study including patients aged 18 or over with hematological malignancy or submitted to HSCT. GM test was measured twice weekly. The hypothesis of IFI was considered in patients with neutropenia and persistent fever despite broad-spectrum antibiotics. Results A total of 496 patients were evaluated; the mean of GM tests performed per patient was 4.2 (+3.1), and 86 (17.3 %) had positive results. IFI was diagnosed in 166 (33.5 %) and IA in 22 (24.6 %) patients. Positive GM test was more frequent in patients with IFI (72.2 % and 25.1 %; OR 8.1; 95 % CI 4.8 - 13.8), and was associated with therapeutic antifungals prescription (52, 9 % and 20.5 %; OR 4.3, 95CI% 2.0 - 9.4), as well as lung abnormalities on HRCT (45.3% vs. 21.5 %; OR 3.0, 95 %CI 1.4 - 6.5). Mortality was 31.6 %. In the multivariate analysis, the variables associated with mortality were the hypothesis of IFI (OR 6.35; 95 % CI 3.63-11.12.0), lung abnormalities on HRCT (57.9 % and 26.9 %; OR 2 0.6; 95 % CI 1.5 - 4.4), and positive GM test (57.9 % and 26.9 %; OR 2.7 95 % CI 1.6 - 4.5). Conclusions Positive GM test was associated with lung abnormalities on HRCT and with the introduction of therapeutic antifungals. If adequate anti-mold prophylaxis is available, the GM test should not be used as screening, but to investigate IFI in high-risk patients. The diagnosis of IFI, positive GM test and lung abnormalities on HRCT were predictors of hospital mortality in patients with hematological malignancies or undergoing HSCT.

Clinical outcomes of aspergillosis among paediatric and adult inpatients: A multicentre study in a Brazilian metropolitan area.

BACKGROUND: Invasive Aspergillosis (IA) is a disease of significant clinical relevance, especially among immunosuppressed patients, and is associated with high mortality rates. In this study, we evaluated the epidemiological features and clinical outcomes in children and adults with IA. METHODS: This was an observational, multicentre, prospective surveillance study of inpatients with IA at two different hospitals in Campinas, Brazil, between 2018 and 2021. RESULTS: A total of 44 patients were identified (54.5% males), with a median age of 42 years (interquartile range (IQR):19.25-59 years, varying between 1 and 89 years). The following baseline conditions were identified: 61.4% were oncohaematological patients and 20.5% were solid organ transplant recipients. Among oncohaematological patients, 77.8% exhibited severe or persistent neutropenia. The median time between the onset of neutropenia and the diagnosis of fungal infection was 20 days (IQR: 10.5-26 days; range, 0-68 days). The interval between neutropenia onset and fungal infection was longer in paediatric than in general hospital (average, 29 vs. 13.4 days; median 26 vs 11 days; p=0.010). After the diagnosis of IA, the survival rates were 44.2% and 30.0% at 180 and 360 days, respectively. Survival was greater in patients aged ≤ 21 years (p = 0.040; log-rank test). They observed no difference in IA mortality related to COVID-19 pandemic. CONCLUSION: High mortality associated with IA was observed in both hospitals. Individuals over the age of 21 have a lower survival rate than younger patients.

When the adrenals alert us to a systemic fungal disease.

We present a patient referred for investigation of adrenal insufficiency, confirmed due to disseminated paracoccidioidomycosis (PCM), with abdominal and central nervous system (CNS) involvement. Establishing the pathogenesis and immunological processes involved in chronic or latent infections by PCM has been challenging. Medical doctors caring for patients with immunodeficiencies should learn about these fungal infections to properly guide travel planning and have this possibility in the diagnostic arsenal when the patient returns from endemic areas. After 13 months of treatment, the patient showed good clinical evolution, and we repeated imaging exams, showing partial improvement of the preview lesions. Diagnosis and treatment can prevent catastrophic events.

Cohort study of hospitalized patients with COVID-19 at Brazilian tertiary-care hospital: Occurrence of adverse events and mortality.

INTRODUCTION: Patients hospitalized with COVID-19 are often submitted to invasive procedures and they are at risk for hospital-associated adverse events. OBJECTIVES: To evaluate the epidemiological and clinical aspects of patients hospitalized with COVID-19; the occurrence of adverse events and the risk factors for mortality. METHOD: Cohort study that included adult patients hospitalized with a diagnosis of SARSCoV-2 infection, at the tertiary University Hospital of UNICAMP from March 2020 to March 2021. Patients were identified through the hospital epidemiological surveillance system and followed until discharge or death. Descriptive, comparative, and logistic regression analysis was performed. RESULTS: 650 adult patients were included. The main adverse events identified were nosocomial infections (31.5%), renal failure (33.8%), thromboembolic and vascular events (12.6%). Mortality was higher among those with bloodstream infections (30.2% vs. 8.6%; p < 0.0001), ventilator-associated pneumonia (VAP, 52.5% vs. 12.3%; p < 0.0001), catheter associated urinary infection (27.3% vs. 7.2%; p < 0.0001); thromboembolic and vascular events (23.0% vs. 9.9%; p < 0.0001) and renal failure (81.3% vs. 20.9%; p < 0.0001). Klebsiella pneumoniae (15.6%), Pseudomonas aeruginosa (14.4%), Enterococcus faecalis (8.6%) were the most isolated bacteria. Logistic regression analysis identified age, (RR = 1.03; 95% CI 1.02 to 1.05); ICU admission (RR = 3.06; 95% CI 1.59 to 5.87), vasoactive drug use (RR = 3.1; 95% CI 1.79 to 4.82); renal failure (RR = 7.76; 95% CI 4.54 to 13.26); and VAP (RR = 2.2; 95% CI 1.23 to 3.96), independently associated with mortality. CONCLUSION: adverse events have an important impact on the evolution of patients with COVID-19, reinforcing the need for optimized prevention and control measures as an essential part of care for these patients.

Oximetry at admission as a predictor of tomographic and functional impairment after 3-6 months in hospitalized patients with COVID-19.

OBJECTIVE: To investigate characteristics that may be associated with radiologic and functional findings following discharge in patients with severe coronavirus disease 2019 (COVID-19). METHODS: This single-center, prospective, observational cohort study comprised patients aged >18 years who were hospitalized with COVID-19 pneumonia, between May and October 2020. After 3 to 6 months of discharge, patients were clinically evaluated and underwent spirometry, a 6-minute walk test (6MWT), and chest computed tomography (CT). Statistical analysis was performed using association and correlation tests. RESULTS: A total of 134 patients were included (25/114 [22%] were admitted with severe hypoxemia). On the follow-up chest CT, 29/92 (32%) had no abnormalities, regardless of the severity of the initial involvement, and the mean 6MWT distance was 447 m. Patients with desaturation on admission had an increased risk of remaining CT abnormalities: patients with SpO2 between 88 and 92% had a 4.0-fold risk, and those with SpO2 < 88% had a 6.2-fold risk. The group with SpO2 < 88% also walked shorter distances than patients with SpO2 between 88 and 92%. CONCLUSION: Initial hypoxemia was found to be a good predictor of persistent radiological abnormalities in follow-up and was associated with low performance in 6MWT.

Cohort study of hospitalized patients with COVID-19 at Brazilian tertiary-care hospital: Occurrence of adverse events and mortality

ABSTRACT Introduction: Patients hospitalized with COVID-19 are often submitted to invasive procedures and they are at risk for hospital-associated adverse events. Objectives: To evaluate the epidemiological and clinical aspects of patients hospitalized with COVID-19; the occurrence of adverse events and the risk factors for mortality. Method: Cohort study that included adult patients hospitalized with a diagnosis of SAR-SCoV-2 infection, at the tertiary University Hospital of UNICAMP from March 2020 to March 2021. Patients were identified through the hospital epidemiological surveillance system and followed until discharge or death. Descriptive, comparative, and logistic regression analysis was performed. Results: 650 adult patients were included. The main adverse events identified were nosocomial infections (31.5%), renal failure (33.8%), thromboembolic and vascular events (12.6%). Mortality was higher among those with bloodstream infections (30.2% vs. 8.6%; p < 0.0001), ventilator-associated pneumonia (VAP, 52.5% vs. 12.3%; p < 0.0001), catheter associated urinary infection (27.3% vs. 7.2%; p < 0.0001); thromboembolic and vascular events (23.0% vs. 9.9%; p < 0.0001) and renal failure (81.3% vs. 20.9%; p < 0.0001). Klebsiella pneumoniae (15.6%), Pseudomonas aeruginosa (14.4%), Enterococcus faecalis (8.6%) were the most isolated bacteria. Logistic regression analysis identified age, (RR = 1.03; 95% CI 1.02 to 1.05); ICU admission (RR = 3.06; 95% CI 1.59 to 5.87), vasoactive drug use (RR = 3.1; 95% CI 1.79 to 4.82); renal failure (RR = 7.76; 95% CI 4.54 to 13.26); and VAP (RR = 2.2; 95% CI 1.23 to 3.96), independently associated with mortality. Conclusion: adverse events have an important impact on the evolution of patients with COVID-19, reinforcing the need for optimized prevention and control measures as an essential part of care for these patients.

COVID-19 and invasive fungal coinfections: A case series at a Brazilian referral hospital.

BACKGROUND: COVID-19 co-infections have been described with different pathogens, including filamentous and yeast fungi. METHODOLOGY: A retrospective case series study conducted from February to December 2020, at a Brazilian university hospital. Data were collected from two hospital surveillance systems: Invasive fungal infection (IFI) surveillance (Mycosis Resistance Program - MIRE) and COVID-19 surveillance. Data from both surveillance systems were cross-checked to identify individuals diagnosed with SARS-CoV-2 (by positive polymerase chain reaction (PCR)) and IFI during hospital stays within the study period. RESULTS: During the study period, 716 inpatients with COVID-19 and 55 cases of IFI were identified. Fungal co-infection with SARS-CoV-2 was observed in eight (1%) patients: three cases of aspergillosis; four candidemia and one cryptococcosis. The median age of patients was 66 years (IQR 58-71 years; range of 28-77 years) and 62.5% were men. Diagnosis of IFI occurred a median of 11.5 days (IQR 4.5-23 days) after admission and 11 days (IQR 6.5-16 days) after a positive PCR result for SARS-CoV-2. In 75% of cases, IFI was diagnosed in the intensive care unit (ICU). Cases of aspergillosis emerged earlier than those of candidemia: an average of 8.6 and 28.6 days after a positive PCR for SARS-CoV-2, respectively. All the patients with both infections ultimately died. CONCLUSION: A low rate of COVID-19 co-infection with IFI was observed, with high mortality. Most cases were diagnosed in ICU patients. Aspergillosis diagnosis is highly complex in this context and requires different criteria.

Cost-Effectiveness Analysis of Influenza A (H1N1) Chemoprophylaxis in Brazil.

Background: Oseltamivir and zanamivir are recommended for treating and preventing influenza A (H1N1) worldwide. In Brazil, this official recommendation lacks an economic evaluation. Our objective was to assess the efficiency of influenza A chemoprophylaxis in the Brazilian context. Methods: We assessed the cost-effectiveness of oseltamivir and zanamivir for prophylaxis of influenza for high risk population, compared to no prophylaxis, in the perspective of Brazilian public health system. Quality-adjusted life years (QALY) and effectiveness data were based on literature review and costs in Brazilian real (BRL) were estimated from official sources and micro-costing of 2016's H1N1 admissions at a university hospital. We used a decision-tree model considering prophylaxis and no prophylaxis and the probabilities of H1N1, ambulatory care, admission to hospital, intensive care, patient discharge, and death. Adherence and adverse events from prophylaxis were included. Incremental cost-effectiveness ratio was converted to 2016 United States dollar (USD). Uncertainty was assessed with univariated and probabilistic sensitivity analysis. Results: Adherence to prophylaxis was 0.70 [95% confidence interval (CI) 0.54; 0.83]; adverse events, 0.09 (95% CI 0.02; 0.18); relative risk of H1N1 infection in chemoprophylaxis, 0.43 (95% CI 0.33; 0.57); incidence of H1N1, 0.14 (95% CI 0.11; 0.16); ambulatory care, 0.67 (95% CI 0.58; 0.75); hospital admission, 0.43 (CI 95% 0.39; 0.42); hospital mortality, 0.14 (CI 95% 0.12; 0.15); intensive care unit admission, 0.23 (95% CI 0.20; 0.27); and intensive care mortality, 0.40 (95% CI 0.29; 0.52). QALY in H1N1 state was 0.50 (95% CI 0.46; 0.53); in H1N1 inpatients, 0.23 (95% CI 0.18; 0.28); healthy, 0.885 (95% CI 0.879; 0.891); death, 0. Adverse events estimated to affect QALY in -0.185 (95% CI -0.290; -0.050). Cost for chemoprophylaxis was BRL 39.42 [standard deviation (SD) 17.94]; ambulatory care, BRL 12.47 (SD 5.21); hospital admission, BRL 5,727.59 (SD 7,758.28); intensive care admission, BRL 19,217.25 (SD 7,917.33); and adverse events, BRL 292.05 (SD 724.95). Incremental cost-effectiveness ratio was BRL -4,080.63 (USD -1,263.74)/QALY and -982.39 (USD -304.24)/H1N1 prevented. Results were robust to sensitivity analysis. Conclusion: Chemoprophylaxis of influenza A (H1N1) is cost-saving in Brazilian health system context.

Invasive non-type b haemophilus influenzae disease: report of eight cases / Doença invasiva causada por haemophilus influenzae não tipo b: relato de oito casos

ASTRACT Objective: To describe eight cases of invasive non-type b Haemophilus influenzae disease in children admitted to Hospital de Clínicas of Universidade Estadual de Campinas. Cases description: In 2015, there were eight cases of invasive non-type b H. influenzae disease. We tested the ampicillin sensitivity and beta-lactamase production of the strains identified and performed the genotyping. Molecular typing was determined by Pulsed-Field Gel Electrophoresis. Four patients were diagnosed with bacteremia; in two cases, H. influenzae was detected in the pleural fluid, and two patients had meningitis. Patients with comorbidities represented 37.5% of cases. Except for the strain of one patient - not sent to the reference laboratory -, all were ampicillin-sensitive and non-beta-lactamase-producing. Genotyping identified four non-capsular, one type c, and two type a strains. Molecular typing ruled out nosocomial transmission since all serotypes were distinct regarding genotype. Comments: The rise in cases of invasive non-type b H. influenzae infection was real. There was no nosocomial transmission, and we found no justification for the increase. These data indicate the need for surveillance to correctly diagnose, monitor, and understand the spectrum of non-type b H. influenzae disease.

ABSTRACT Objetivo: Descrever oito casos de doença invasiva por Haemophilus influenzae não tipo b em crianças internadas no Hospital de Clínicas da Universidade Estadual de Campinas. Descrição dos casos: Em 2015, ocorreram oito casos de doença invasiva por H. influenzae não tipo b. Nas cepas identificadas, testou-se a sensibilidade à ampicilina e a produção de betalactamase, e realizou-se a genotipagem. A tipagem molecular foi feita por Pulsed Field Gel Electrophoresis. Em quatro pacientes, o diagnóstico foi de bacteremia; em dois casos, H. influenzae foi identificado em líquido pleural, e dois pacientes tiveram meningite. Comorbidades foram encontradas em 37,5% dos pacientes. Com exceção da cepa de um dos pacientes (que não foi enviada ao laboratório de referência), todas eram sensíveis à ampicilina e não produtoras de betalactamase. A genotipagem identificou quatro cepas não capsulares, uma cepa tipo c e duas cepas tipo a. A tipagem molecular descartou a transmissão intra-hospitalar, já que todos os sorotipos eram distintos quanto ao genótipo. Comentários: O aumento dos casos de infecção invasiva por H. influenzae não tipo b foi real. Não houve transmissão intra-hospitalar e não foi encontrada justificativa para o aumento. Esses dados indicam a necessidade de vigilância para diagnosticar corretamente, monitorar e entender o espectro da doença causada por H. influenzae não tipo b.

INVASIVE NON-TYPE B HAEMOPHILUS INFLUENZAE DISEASE: REPORT OF EIGHT CASES.

OBJECTIVE: To describe eight cases of invasive non-type b Haemophilus influenzae disease in children admitted to Hospital de Clínicas of Universidade Estadual de Campinas. CASES DESCRIPTION: In 2015, there were eight cases of invasive non-type b H. influenzae disease. We tested the ampicillin sensitivity and beta-lactamase production of the strains identified and performed the genotyping. Molecular typing was determined by Pulsed-Field Gel Electrophoresis. Four patients were diagnosed with bacteremia; in two cases, H. influenzae was detected in the pleural fluid, and two patients had meningitis. Patients with comorbidities represented 37.5% of cases. Except for the strain of one patient - not sent to the reference laboratory -, all were ampicillin-sensitive and non-beta-lactamase-producing. Genotyping identified four non-capsular, one type c, and two type a strains. Molecular typing ruled out nosocomial transmission since all serotypes were distinct regarding genotype. COMMENTS: The rise in cases of invasive non-type b H. influenzae infection was real. There was no nosocomial transmission, and we found no justification for the increase. These data indicate the need for surveillance to correctly diagnose, monitor, and understand the spectrum of non-type b H. influenzae disease.

Cost-utility analysis of outpatient parenteral antimicrobial therapy (OPAT) in the Brazilian national health system.

BACKGROUND: Outpatient parenteral antimicrobial therapy (OPAT) has been used for decades in different countries to reduce hospitalization rates, with favorable clinical and economic outcomes. This study assesses the cost-utility of OPAT compared to inpatient parenteral antimicrobial therapy (IPAT) from the perspective of a public university hospital and the Brazilian National Health System (Unified Health System -SUS). METHODS: Prospective study with adult patients undergoing OPAT at an infusion center, compared to IPAT. Clinical outcomes and quality-adjusted life year (QALY) were assessed, as well as a micro-costing. Cost-utility analysis from the hospital and SUS perspectives were conducted by means of a decision tree, within a 30-day horizon time. RESULTS: Forty cases of OPAT (1112 days) were included and monitored, with a favorable outcome in 97.50%. OPAT compared to IPAT generated overall savings of 31.86% from the hospital perspective and 26.53% from the SUS perspective. The intervention reduced costs, with an incremental cost-utility ratio of -44,395.68/QALY for the hospital and -48,466.70/QALY for the SUS, with better cost-utility for treatment times greater than 14 days. Sensitivity analysis confirmed the stability of the model. CONCLUSION: Our economic assessment demonstrated that, in the Brazilian context, OPAT is a cost-saving strategy both for hospitals and for the SUS.

First report of African tick-bite fever in a South American traveler.

We report a clinical case of African tick-bite fever in a Brazilian traveler right after his return from South Africa. Definitive diagnosis was supported by seroconversion between acute-phase and convalescent-phase serum samples, detection of rickettsial DNA in skin lesions, and in vitro culture of Rickettsia africae from the patient's skin. Most of the previous reported cases of African tick-bite fever were confirmed solely by serological or/and molecular methods. Through this first confirmed case of African tick-bite fever in Brazil, it is quite possible that other cases are occurring unnoticed by the health authorities, requiring a greater vigilance in traveler's medicine in South America.

A Machine Learning Application Based in Random Forest for Integrating Mass Spectrometry-Based Metabolomic Data: A Simple Screening Method for Patients With Zika Virus.

Recent Zika outbreaks in South America, accompanied by unexpectedly severe clinical complications have brought much interest in fast and reliable screening methods for ZIKV (Zika virus) identification. Reverse-transcriptase polymerase chain reaction (RT-PCR) is currently the method of choice to detect ZIKV in biological samples. This approach, nonetheless, demands a considerable amount of time and resources such as kits and reagents that, in endemic areas, may result in a substantial financial burden over affected individuals and health services veering away from RT-PCR analysis. This study presents a powerful combination of high-resolution mass spectrometry and a machine-learning prediction model for data analysis to assess the existence of ZIKV infection across a series of patients that bear similar symptomatic conditions, but not necessarily are infected with the disease. By using mass spectrometric data that are inputted with the developed decision-making algorithm, we were able to provide a set of features that work as a "fingerprint" for this specific pathophysiological condition, even after the acute phase of infection. Since both mass spectrometry and machine learning approaches are well-established and have largely utilized tools within their respective fields, this combination of methods emerges as a distinct alternative for clinical applications, providing a diagnostic screening-faster and more accurate-with improved cost-effectiveness when compared to existing technologies.

Efficient detection of Zika virus RNA in patients' blood from the 2016 outbreak in Campinas, Brazil.

Infection with Zika virus (ZIKV), a mosquito-borne flavivirus has been casually linked with increased congenital microcephaly in Brazil from 2015 through 2016. Sensitive and specific diagnosis of patients with Zika fever (ZIKF) remains critical for patient management. We developed a ZIKV NS5 qRT-PCR assay by combining primers described by Balm et al. and a new Taqman probe. The assay was evaluated and compared with another assay described by Lanciotti et al. (ZIKV 1107) using 51 blood and 42 urine samples from 54 suspected ZIKV patients. ZIKV NS5 performed better in terms of sensitivity with more samples detected as ZIKV-positive (n = 37) than ZIKV 1107 (n = 34) for urine, and ZIKV-positive (n = 29) than ZIKV 1107 (n = 26) for blood. Both assays displayed good overall agreement for urine (κappa = 0.770) and blood (κappa = 0.825) samples. Improved availability of validated diagnostic tests, such ZIKV NS5 qRT-PCR, will be critical to ensure adequate and accurate ZIKV diagnosis.

Serum markers as an aid in the diagnosis of pulmonary fungal infections in AIDS patients

ABSTRACT Introduction: The etiology of pulmonary infections in HIV patients is determined by several variables including geographic region and availability of antiretroviral therapy. Materials and methods: A cross-sectional prospective study was conducted from 2012 to 2016 to evaluate the occurrence of pulmonary fungal infection in HIV-patients hospitalized due to pulmonary infections. Patients' serums were tested for (1-3)-β-D-Glugan, galactomannan, and lactate dehydrogenase. The association among the variables was analyzed by univariate and multivariate regression analysis. Results: 60 patients were included in the study. The patients were classified in three groups: Pneumocystis jirovecii pneumonia (19 patients), community-acquired pneumonia (18 patients), and other infections (23 patients). The overall mortality was 13.3%. The time since diagnosis of HIV infection was shorter in the pneumocystosis group (4.94 years; p = 0.001) than for the other two groups of patients. The multivariate analysis showed that higher (1-3)-β-D-Glucan level (mean: 241 pg/mL) and lactate dehydrogenase (mean: 762 U/L) were associated with the diagnosis of pneumocystosis. Pneumocystosis was the aids-defining illness in 11 out of 16 newly diagnosed HIV-infected patients. Conclusion: In the era of antiretroviral therapy, PJP was still the most prevalent pulmonary infection and (1-3)-β-D-Glucan and lactate dehydrogenase may be suitable markers to help diagnosing pneumocystosis in our HIV population.

SPECT/CT with radiolabeled somatostatin analogues in the evaluation of systemic granulomatous infections / SPECT/CT com análogos radiomarcados de somatostatina na avaliação de infecções granulomatosas sistêmicas

Abstract Objective: To evaluate SPECT/CT with radiolabeled somatostatin analogues (RSAs) in systemic granulomatous infections in comparison with gallium-67 (67Ga) citrate scintigraphy. Materials and Methods: We studied 28 patients with active systemic granulomatous infections, including tuberculosis, paracoccidioidomycosis, pneumocystosis, cryptococcosis, aspergillosis, leishmaniasis, infectious vasculitis, and an unspecified opportunistic infection. Of the 28 patients, 23 had started specific treatment before the study outset. All patients underwent whole-body SPECT/CT imaging: 7 after injection of 99mTc-EDDA-HYNIC-TOC, and 21 after injection of 111In-DTPA-octreotide. All patients also underwent 67Ga citrate imaging, except for one patient who died before the 67Ga was available. Results: In 20 of the 27 patients who underwent imaging with both tracers, 27 sites of active disease were detected by 67Ga citrate imaging and by SPECT/CT with an RSA. Both tracers had negative results in the other 7 patients. RSA uptake was visually lower than 67Ga uptake in 11 of the 20 patients with positive images and similar to 67Ga uptake in the other 9 patients. The only patient who did not undergo 67Ga scintigraphy underwent 99mTc-EDDA-HYNIC-TOC SPECT/CT-guided biopsy of a lung cavity with focal RSA uptake, which turned to be positive for aspergillosis. Conclusion: SPECT/CT with 99mTc-EDDA-HYNIC-TOC or 111In-DTPA-octreotide seems to be a good alternative to 67Ga citrate imaging for the evaluation of patients with systemic granulomatous disease.

Resumo Objetivo: Avaliar o estudo SPECT/CT com análogos de somatostatina radiomarcados (RSA) em infecções granulomatosas sistêmicas, em comparação com o estudo com gálio-67 (67Ga). Materiais e Métodos: Vinte e oito paciente com infecção granulomatosa sistêmica ativa foram estudados, incluindo tuberculose, paracoccidioidomicose, pneumocistose, criptococose, aspergilose, leishmaniose, vasculite infecciosa e uma infecção oportunista inespecífica. Vinte e três tinham iniciado o tratamento previamente ao estudo. Todos fizeram imagem de varredura e SPECT/CT, 7 deles pós-injeção de 99mTc-EDDA-HYNIC-TOC e os outros 21 pós-injeção de 111In-DTPA-octreotide. Todos os pacientes também fizeram cintilografia com 67Ga, exceto um, que fez biópsia guiada por 99mTc-EDDA-HYNIC-TOC. Resultados: Vinte e sete sítios de atividade foram detectados com 67Ga em 20 de 27 pacientes, também vistos nos estudos com RSA. Ambos foram negativos nos outros 7 pacientes. A captação de RSA foi visualmente menor que a de 67Ga em 11 de 20 pacientes positivos e similar nos outros 9. Um paciente que não pôde fazer cintilografia com 67Ga, fez biópsia guiada por 99mTc-EDDAHYNIC-TOC SPECT/CT em uma cavidade pulmonar com captação desse traçador, que foi positiva para aspergilose. Conclusão: SPECT/CT com 99mTc-EDDA-HYNIC-TOC ou 111In-DTPA-octreotide parece ser uma boa alternativa para o estudo com 67Ga na avaliação de pacientes com doença granulomatosa sistêmica.