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1.
BMC Infect Dis ; 23(1): 693, 2023 Oct 17.
Artículo en Inglés | MEDLINE | ID: mdl-37848811

RESUMEN

BACKGROUND: Pneumocystis jirovecii pneumonia (PCP) and SARS-CoV2 share some similarities in their effects on the respiratory system, clinical presentation, and management. The COVID-19 pandemic required rapid action to curb transmission and mitigate its lethiferous impact. Non-pharmaceutical interventions (NPIs) were globally adopted. We hypothesized that these measures reduced the transmission and acquisition of P. jirovecii in both hospital and community settings. METHODS: We conducted a retrospective observational study on 2950 respiratory specimens from patients with suspected pulmonary infection, analyzed at the Laboratory of Parasitology Unit of the Policlinico Tor Vergata of Rome, Italy, from January 2014 to December 2022. RESULTS: We show a significant reduction in the frequency of PCP in the COVID-19 pandemic era compared to the previous period. Among the four sequence types of P. jirovecii identified, genotype 1 was the most prevalent (37%). We observed a non-significant trend of decreasing cases with genotype 1 and increasing cases with genotype 3 over the study period. CONCLUSIONS: The nationwide implementation of NPIs against COVID-19 may have changed the microbiological landscape of exposure, thereby decreasing the exposure to P. jirovecii and consequently reducing the incidence of PCP.


Asunto(s)
COVID-19 , Pneumocystis carinii , Neumonía por Pneumocystis , Humanos , Neumonía por Pneumocystis/microbiología , Estudios Retrospectivos , Pneumocystis carinii/genética , Pandemias , ARN Viral , COVID-19/epidemiología , SARS-CoV-2/genética
2.
Dig Dis Sci ; 67(5): 1539-1552, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-34383197

RESUMEN

Mark Hanscom Courtney Stead Harris Feldman Neil B. Marya David Cave.


Asunto(s)
Endoscopía Capsular , Endoscopía Gastrointestinal , Hemorragia Gastrointestinal , Humanos , Intestino Delgado
3.
Mycoses ; 65(2): 233-238, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34883533

RESUMEN

BACKGROUND: Several studies in immunocompromised patients, such as those with HIV infection, undergoing cancer chemotherapy or organ transplant, have led to the development of guidelines on the use of prophylaxis to prevent Pneumocystis jirovecii pneumonia (PJP), in these specific conditions. Instead, since the association between PJP and acute myeloid leukaemia (AML) is not clearly defined, the role of prophylaxis in patients with AML is not yet established. METHODS: We retrospectively analysed 251 consecutive patients with newly diagnosed non-M3-AML, admitted at the Hematology Unit of University Tor Vergata in Rome, during the period 2010-2020. The aim of the study was to evaluate the incidence of PJP among AML patients during their first hospital admission, and to identify subjects at a high risk to develop PJP. RESULTS: Among 251 consecutive patients with non-M3-AML, 67 bronchoalveolar lavages (BAL) were performed. PJP was proven in 11/67 (16.7%) subjects undergoing BAL (11 males, median age 71 years), with an incidence of 4.3%. The most common reason for BAL execution were radiological findings such as ground-glass opacities (6/11, 55%) and atypical patterns like consolidations and nodules (5/11, 45%). One patient died because of PJP after 11 days of trimethoprim/sulfamethoxazole therapy. In multivariate analysis older age and smoking habit were independent factors significantly associated with PJP (p = .021 and 0.017 respectively). CONCLUSION: We conclude that PJP infection is not uncommon among patients with AML. If intensive chemotherapy is planned, physicians should be aware of this risk and prophylaxis should be considered, particularly in older patients.


Asunto(s)
Leucemia Mieloide Aguda , Neumonía por Pneumocystis , Anciano , Femenino , Humanos , Leucemia Mieloide Aguda/complicaciones , Masculino , Pneumocystis carinii , Neumonía por Pneumocystis/epidemiología , Estudios Retrospectivos
4.
J Clin Gastroenterol ; 55(9): 792-797, 2021 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-32947375

RESUMEN

INTRODUCTION: Since 2001, device-assisted enteroscopy (DAE) has revolutionized the diagnostic and therapeutic capabilities for managing small bowel pathology. Though commonly performed, there have been no recent large studies to assess the use, yield, and risks of DAE and none that include all 3 DAE modalities. We hypothesized that DAE is safe with high diagnostic and therapeutic yields achieved within reasonable procedure duration and here we present a large retrospective multicenter US study evaluating the use, yield, and complications of DAE. METHODS: After obtaining institutional review board approval, electronic records were used to identify all DAE's performed for luminal small bowel evaluation in adult patients at 4 US referral centers (Duke University Medical Center, New York University Langone Medical Center, Louisiana State University Health Sciences Center, and University of Massachusetts Medical Center) from January 1, 2014 to January 1, 2019. Electronic medical records were reviewed to collect and analyze a variety of procedure-related outcomes. Using the data pooled across centers, descriptive statistics were generated for the patient and procedure-related characteristics and outcomes; relationships between characteristics and outcomes were explored. RESULTS: A total of 1787 DAE's were performed over this 5-year period (392 at Duke University Medical Center, 887 at Louisiana State University Health Sciences Center, 312 at New York University Langone Medical Center, and 195 at University of Massachusetts Medical Center). Of these, there were 1017 (57%) double-balloon, 391 (29%) single-balloon, and 378 (21%) spiral enteroscopies. The mean age of patients undergoing DAE was 66 years and 53% of examinations were performed on women; 18% of patients in the cohort underwent >1 DAE over this time span. A total of 53% of examinations were performed for suspected small bowel bleeding, 31% were directly guided by video capsule endoscopy findings and 8% were performed for abnormal imaging. A total of 85% of examinations used an antegrade approach and DAE took a mean of 45 minutes to complete; 76% of examinations revealed abnormal findings, with vascular, inflammatory, and neoplastic findings seen in 49%, 17%, and 15% of the cohort, respectively. Older age was significantly associated with any abnormal finding, including arteriovenous malformations (P<0.0001); 50% of examinations included a therapeutic maneuver, most commonly argon plasma coagulation/cautery (43%). There were complications in 16 examinations (0.9%) including 2 perforations (0.1%), 6 cases with bleeding (0.3%) and 1 episode of pancreatitis (0.1%). CONCLUSIONS: DAE is most commonly performed to evaluate suspected small bowel bleeding and is commonly directed by video capsule findings. DAE is safe, has a high diagnostic yield, with 76% of examinations showing abnormal findings, and frequently features therapeutic maneuvers. Advancing age is associated with abnormal findings on DAE.


Asunto(s)
Endoscopía Capsular , Enfermedades Intestinales , Adulto , Anciano , Enteroscopía de Doble Balón , Femenino , Hemorragia Gastrointestinal/diagnóstico , Hemorragia Gastrointestinal/etiología , Humanos , Enfermedades Intestinales/diagnóstico , Intestino Delgado/diagnóstico por imagen , Estudios Retrospectivos , Estados Unidos
5.
Dig Dis Sci ; 65(5): 1307-1314, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-32162121

RESUMEN

Bleeding from the small intestine remains a clinically challenging diagnostic and therapeutic problem. It may be minor, requiring only supplemental iron treatment, to patients who have severe overt bleeding that requires multimodal intervention. This article provides an up-to-date review of the state-of-the-art of diagnosis and treatment of small intestinal bleeding.


Asunto(s)
Endoscopía Capsular/métodos , Hemorragia Gastrointestinal/diagnóstico , Enfermedades Intestinales/diagnóstico , Melena/diagnóstico , Adulto , Anciano , Diagnóstico Diferencial , Femenino , Hemorragia Gastrointestinal/complicaciones , Humanos , Enfermedades Intestinales/complicaciones , Intestino Delgado/diagnóstico por imagen , Masculino , Melena/etiología , Persona de Mediana Edad
6.
Am J Emerg Med ; 38(6): 1245-1252, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32229221

RESUMEN

OBJECTIVE: The assessment of the severity of upper gastrointestinal hemorrhage in emergency department (ED) patients is difficult to assess with commonly available diagnostic tools. Small studies have shown that video capsule endoscopy (VCE) is a promising risk-stratification method and may be better than current clinical decision rules such as the Rockall score and the Glasgow Blatchford score. This review aims to assess the accuracy of VCE to detect active upper gastrointestinal hemorrhage compared to a reference standard. METHODS: The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) methodology was used to perform a review of studies that have measured the diagnostic accuracy of VCE. Studies were included if they measured ED use of VCE for upper GI hemorrhage as compared to a reference standard of an esophagogastroduodenoscopy (EGD). A meta-analysis was performed on select patients using a fixed effects and random-effects model to determine the primary outcome of diagnostic test accuracy. RESULTS: 40 studies were screened for eligibility and five studies representing 193 patients met the inclusion and exclusion criteria. All patients received both a VCE and an EGD. The sensitivity and specificity of VCE were 0.724 and 0.748, respectively. The diagnostic odds ratio was 6.29 (95% CI: 3.23-12.25) and the summary receiver operating characteristic curve was 0.782. CONCLUSIONS: VCE demonstrated high accuracy for detecting upper GI hemorrhage in this meta-analysis of existing studies. In light of the potential advantages of VCE in the ED, further research is warranted to further establish its role.


Asunto(s)
Endoscopía Capsular/métodos , Hemorragia Gastrointestinal/diagnóstico por imagen , Tracto Gastrointestinal Superior/anomalías , Adulto , Endoscopía Capsular/normas , Servicio de Urgencia en Hospital/organización & administración , Hemorragia Gastrointestinal/diagnóstico , Hemorragia Gastrointestinal/fisiopatología , Humanos , Sensibilidad y Especificidad , Tracto Gastrointestinal Superior/irrigación sanguínea , Tracto Gastrointestinal Superior/diagnóstico por imagen
7.
Gastrointest Endosc ; 89(1): 33-43.e4, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-29935143

RESUMEN

BACKGROUND AND AIMS: Patients presenting with nonhematemesis GI bleeding (NHGIB) represent a diagnostic challenge for physicians. We performed a randomized controlled trial to assess the benefits of deployment of a video capsule soon after admission in the management of patients presenting with melena, hematochezia, or severe anemia compared with standard of care management. METHODS: Patients admitted with NHGIB were randomized and placed into 1 of 2 study groups. In the experimental group, patients ingested a video capsule soon after admission to the hospital. These patients had further endoscopic workup based on the findings from the capsule. Patients in the control group underwent endoscopic evaluation (ie, upper endoscopy, capsule endoscopy, and/or colonoscopy) to identify the source of bleeding as directed by the attending gastroenterologist's interpretation of their clinical presentation. The primary endpoint for this study was the rate of localization of bleeding during hospitalization. RESULTS: Eighty-seven patients were included in this study: 45 randomized to the standard of care arm and 42 to the early capsule arm. A bleeding source was localized in 64.3% of the patients in the early capsule arm and in 31.1% of the patients in the standard of care arm (P < .01). The likelihood of endoscopic localization of bleeding over time was greater for patients receiving early capsule endoscopy compared with those in the standard of care arm (adjusted hazard ratio, 2.77; 95% confidence interval, 1.36-5.64). CONCLUSIONS: For patients admitted to the hospital for NHGIB, early capsule endoscopy is a safe and effective alternative for the detection of the source of bleeding. (Clinical trial registration number: NCT02442830.).


Asunto(s)
Endoscopía Capsular/métodos , Hemorragia Gastrointestinal/diagnóstico , Anciano , Anciano de 80 o más Años , Anemia/etiología , Colonoscopía/métodos , Diagnóstico Precoz , Endoscopía del Sistema Digestivo/métodos , Femenino , Humanos , Estimación de Kaplan-Meier , Modelos Logísticos , Masculino , Melena , Persona de Mediana Edad , Análisis Multivariante , Modelos de Riesgos Proporcionales , Nivel de Atención , Factores de Tiempo
8.
Dig Dis Sci ; 64(11): 3040-3047, 2019 11.
Artículo en Inglés | MEDLINE | ID: mdl-31468267

RESUMEN

Video capsule endoscopy became a reality in 2001. This device enabled us to directly view the mucosa of the small intestine for the first time. The main indications for the video capsule remain the detection of small intestinal bleeding and iron deficiency anemia, diagnosis and management of Crohn's disease, and detection of tumors. The device is extraordinarily safe and can be used in the very young to the very old. However, there remain several areas of controversy and difficulty. These are covered in this article and include details of indications and contraindications, whether to prepare patients, whether or not to use simethicone and prokinetics. Detection of location of the capsule remains a major engineering challenge. Reading the videos reliably and quickly remains challenging. However, artificial intelligence and machine learning are already on the horizon to provide assistance. New uses for capsule endoscopy promise more accurate diagnosis and hence improved management of acute gastrointestinal bleeding. The colon capsule may eventually help those who refuse conventional colonoscopy, and robotically controlled capsules may be helpful in screening for serious disease in patients with upper abdominal complaints. The advent of the broadening use of video capsule endoscopy is, though it will be controversial, embraced by some and derided by others; such is the nature of technological development. In the long run, if the use of the video capsule, based on sound evidence-based studies, can be shown to improve the care of our patients and reduce the cost of health care, its use will continue to expand.


Asunto(s)
Endoscopía Capsular/normas , Endoscopía Gastrointestinal/normas , Enfermedades Intestinales/diagnóstico por imagen , Intestino Delgado/diagnóstico por imagen , Endoscopía Capsular/métodos , Endoscopía Gastrointestinal/métodos , Humanos , Enfermedades Intestinales/cirugía , Intestino Delgado/cirugía
9.
Scand J Gastroenterol ; 53(2): 168-172, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-29235392

RESUMEN

INTRODUCTION: Patients with Crohn's disease (CD) are at increased risk for osteoporosis and fractures as compared to the general population. Recently, various cytokines including tumor necrosis factor (TNF)-alpha are found to play a major role in bone health. In this study, we aimed to gain a better understanding of the risk factors for osteoporosis and vitamin D deficiency in the era of TNF-alpha inhibitors. METHODS: We conducted a retrospective review of 464 consecutive patients with CD in our GI clinic between 2008 and 2015. Statistical analysis was performed using the student t-test and chi-square test. RESULTS: CD patients treated with TNF-alpha inhibitors (TNF) and those who are anti-TNF naïve (NB) had similar rates of vitamin D deficiency, insufficiency and normal vitamin D-25-OH levels. Similarly, rates of osteoporosis (16% vs 18%), osteopenia (53% vs 57%) and normal bone density (31% vs 25%) were comparable between the TNF and NB groups respectively. However, Z-scores at the spine (-0.47 vs -0.05) were significantly lower in the TNF group (p = .03). Interestingly, rates of osteoporosis in the NB group were drastically different before and after age 60 (3.6% vs 30%) with no major difference in the TNF group (15% vs 18%). Bone density was positively correlated with BMI (Pearson's R = 0.39) and negatively correlated with age and smoking status (R= -0.25). CONCLUSIONS: TNF group patients were diagnosed with osteoporosis from an earlier age compared to NB group but with a smaller increase in osteoporosis after menopause. Further prospective studies are necessary to further determine the role of anti-TNF medications in osteoporosis.


Asunto(s)
Enfermedad de Crohn/tratamiento farmacológico , Fracturas Óseas/epidemiología , Osteoporosis/epidemiología , Factor de Necrosis Tumoral alfa/antagonistas & inhibidores , Adulto , Anciano , Densidad Ósea , Enfermedad de Crohn/complicaciones , Femenino , Humanos , Masculino , Massachusetts , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Vitamina D/sangre
10.
Dig Dis Sci ; 63(12): 3448-3456, 2018 12.
Artículo en Inglés | MEDLINE | ID: mdl-30136044

RESUMEN

BACKGROUND: Location of bleeding can present a diagnostic challenge in patients without hematemesis more so than those with hematemesis. AIM: To describe endoscopic diagnostic yields in both hematemesis and non-hematemesis gastrointestinal bleeding patient populations. METHODS: A retrospective analysis on a cohort of 343 consecutively identified gastrointestinal bleeding patients admitted to a tertiary care center emergency department with hematemesis and non-hematemesis over a 12-month period. Data obtained included presenting symptoms, diagnostic lesions, procedure types with diagnostic yields, and hours to diagnosis. RESULTS: The hematemesis group (n = 105) took on average 15.6 h to reach a diagnosis versus 30.0 h in the non-hematemesis group (n = 231), (p = 0.005). In the non-hematemesis group, the first procedure was diagnostic only 53% of the time versus 71% in the hematemesis group (p = 0.02). 25% of patients in the non-hematemesis group required multiple procedures versus 10% in the hematemesis group (p = 0.004). Diagnostic yield for a primary esophagogastroduodenoscopy was 71% for the hematemesis group versus 50% for the non-hematemesis group (p = 0.01). Primary colonoscopies were diagnostic in 54% of patients and 12.5% as a secondary procedure in the non-hematemesis group. A primary video capsule endoscopy yielded a diagnosis in 79% of non-hematemesis patients (n = 14) and had a 70% overall diagnostic rate (n = 33). CONCLUSION: Non-hematemesis gastrointestinal bleeding patients undergo multiple non-diagnostic tests and have longer times to diagnosis and then compared those with hematemesis. The high yield of video capsule endoscopy in the non-hematemesis group suggests a role for this device in this context and warrants further investigation.


Asunto(s)
Endoscopía Capsular , Colonoscopía , Diagnóstico Tardío/prevención & control , Endoscopía del Sistema Digestivo , Hemorragia Gastrointestinal , Hematemesis , Adulto , Anciano , Endoscopía Capsular/métodos , Endoscopía Capsular/estadística & datos numéricos , Colonoscopía/métodos , Colonoscopía/estadística & datos numéricos , Endoscopía del Sistema Digestivo/métodos , Endoscopía del Sistema Digestivo/estadística & datos numéricos , Femenino , Hemorragia Gastrointestinal/complicaciones , Hemorragia Gastrointestinal/diagnóstico , Tracto Gastrointestinal/diagnóstico por imagen , Tracto Gastrointestinal/patología , Hematemesis/diagnóstico , Hematemesis/etiología , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Resultado en la Atención de Salud , Estudios Retrospectivos , Factores de Riesgo , Factores de Tiempo , Estados Unidos , Procedimientos Innecesarios/estadística & datos numéricos
11.
New Microbiol ; 41(1): 83-85, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29505068

RESUMEN

Acanthamoeba ocular infections, known as Acanthamoeba keratitis, are an emerging problem among contact lens wearers. Infections mediated by Acanthamoeba are uncommon, but they can be underestimated due to poor awareness and delayed diagnosis. The routine use of rapid and cost-effective molecular methods like Real Time PCR for the diagnosis of this important pathogen could improve diagnosis and therapy outcome. This report describes the detection by Real Time PCR assay of six T4 and one T3 Acanthamoeba infections, as the first reported cases in Tuscany, Italy.


Asunto(s)
Queratitis por Acanthamoeba/epidemiología , Acanthamoeba/aislamiento & purificación , Lentes de Contacto , Acanthamoeba/genética , Adulto , Anciano , Lentes de Contacto/parasitología , Femenino , Humanos , Italia/epidemiología , Masculino , Persona de Mediana Edad , Filogenia , Reacción en Cadena en Tiempo Real de la Polimerasa/métodos , Adulto Joven
12.
J Clin Gastroenterol ; 51(8): 720-727, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27557115

RESUMEN

BACKGROUND: Gastrointestinal angioectasias (AEs) represent the most common vascular malformation within the gastrointestinal tract. This study sought to characterize epidemiologic/comorbid risk factors for AEs, rebleeding, and patterns of anatomic distribution within the small intestine. STUDY: This retrospective observational cohort study included 158 patients with AEs on capsule endoscopy (CE) from 2007 to 2015. Epidemiologic/comorbid data were collected and incorporated into final analysis. Each AE was categorized by location using a small bowel transit time-based quartile system. Rebleeding was evaluated following CE. Multivariate logistic regression was applied to statistically significant factors on univariate analysis to determine independent risk factors for rebleeding. RESULTS: Most lesions were found in the first quartile (67.1%). Rebleeding occurred in 46 (29.7%) of the 156 patients for whom data were available. Rates of rebleeding were significantly higher among older patients (74.4 vs. 67.7 y, P=0.001), those with active bleeding on CE (41.3% vs. 16.5%, P=0.001), those with a history of aortic stenosis (21.7% vs. 9.2%, P=0.033), and those with AEs presents in quartile 3 (26.1% vs. 8.3%, P=0.003). Age, active bleeding on CE, and AE presence in quartile 3 were independently associated with rebleeding in multivariate analysis (P=0.009, 0.023, and 0.008, respectively). CONCLUSIONS: These data help improve our knowledge of AEs regarding risk factors for rebleeding, and utilizes a novel small bowel transit time-based quartile localization method that may simplify future research and comparisons of anatomic distribution and behavior of small bowel AEs.


Asunto(s)
Malformaciones Arteriovenosas/epidemiología , Hemorragia Gastrointestinal/epidemiología , Intestino Delgado , Anciano , Malformaciones Arteriovenosas/etiología , Malformaciones Arteriovenosas/patología , Malformaciones Arteriovenosas/prevención & control , Endoscopía Capsular , Estudios de Cohortes , Femenino , Hemorragia Gastrointestinal/etiología , Hemorragia Gastrointestinal/patología , Hemorragia Gastrointestinal/prevención & control , Humanos , Masculino , Massachusetts/epidemiología , Registros Médicos , Recurrencia , Estudios Retrospectivos , Factores de Riesgo
13.
Parasitol Res ; 116(4): 1273-1284, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28190156

RESUMEN

Free-living amoebae of the genus Acanthamoeba are worldwide present in natural and artificial environments, and are also clinically important, as causative agents of diseases in humans and other animals. Acanthamoeba comprises several species, historically assigned to one of the three groups based on their cyst morphology, but presently recognized as at least 20 genotypes (T1-T20) on the basis of their nuclear 18S ribosomal RNA (rRNA) gene (18S rDNA) sequences. While strain identification may usually be achieved targeting short (<500 bp) 18S ribosomal DNA (rDNA) fragments, the use of full-length gene sequences (>2200 bp) is necessary for correct genotype description and reliable molecular phylogenetic inference. The genotype T15, corresponding to Acanthamoeba jacobsi, is the only genotype described on the basis of partial sequences (~1500 bp). While this feature does not prevent the correct identification of the strains, having only partial sequences renders the genotype T15 not completely defined and may furthermore affect its position in the Acanthamoeba molecular tree. Here, we complete this gap, by obtaining full-length 18S rDNA sequences from eight A. jacobsi strains, genotype T15. Morphologies and physiological features of isolated strains are reported. Molecular phylogeny based on full 18S rDNA confirms some previous suggestions for a genetic link between T15 and T13, T16, and T19, with T19 as sister-group to T15.


Asunto(s)
Acanthamoeba/genética , ADN Protozoario/genética , ADN Ribosómico/genética , Genotipo , ARN Ribosómico 18S/genética , Animales , Humanos , Filogenia
14.
New Microbiol ; 40(3): 208-211, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-28920631

RESUMEN

Respiratory samples from Pneumocystis jirovecii pneumonia (PJP) cases collected at a tertiary-care university hospital in Modena were analyzed for the presence of specific polymorphisms in the mitochondrial large subunit ribosomal RNA (mtLSU-rRNA). Retrospectively, 57 cases were selected in a six-year period and 34 out of the 57 processed BAL samples returned PCR positive results, thus allowing further molecular analysis. The following P.jirovecii genotype distribution was observed: genotype 3 (50%), genotype 2 (23%), genotype 1 (18%), genotypes 1 or 4 (9%). These data add novel insights on P.jirovecii epidemiology, investigating a previously unstudied area of Northern Italy. A peculiar local distribution is highlighted with respect to other areas within the national panorama, thus encouraging further in-depth studies in an attempt to better understand the overall situation concerning P.jirovecii genotype circulation.


Asunto(s)
Pneumocystis carinii/clasificación , Neumonía por Pneumocystis/microbiología , Polimorfismo Genético , ARN de Hongos/genética , ARN/genética , Síndrome de Inmunodeficiencia Adquirida/complicaciones , Adulto , Anciano , Anciano de 80 o más Años , Líquido del Lavado Bronquioalveolar/microbiología , Femenino , Genotipo , Técnicas de Genotipaje , Humanos , Italia , Linfoma/complicaciones , Masculino , Persona de Mediana Edad , Proyectos Piloto , Pneumocystis carinii/genética , Neumonía por Pneumocystis/complicaciones , Enfermedad Pulmonar Obstructiva Crónica/complicaciones , ARN Mitocondrial , Estudios Retrospectivos , Centros de Atención Terciaria
15.
Exp Parasitol ; 170: 82-89, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27663468

RESUMEN

Over the years, the potential pathogenicity of Acanthamoeba for humans and animals has gained increasing attention from the scientific community. More than 24 species belong to this genus, however only some of them are causative agents of keratitis and encephalitis in humans. Due to technical difficulties in diagnosis, these infections are likely to be under-detected. The introduction of 18S rDNA amplification for the identification of Acanthamoeba has dramatically enhanced diagnosis performances, but the attestation of genotyping requires supplementary sequencing-based procedures. In this study, 15 Acanthamoeba strains were collected and grown on nutrient agar media. Each strain was genotyped by end-point PCR assay for the amplification of the 18S rDNA gene and the genotype was assigned by sequencing analysis through neighbor joining phylogenetic tree. In order to optimize standardization of the MALDI-TOF MS assay, we established the collection time point at the cystic phase. Two strains of each genotype were randomly chosen to customize the biotyper database. For all strains, 24 spectral measurements were acquired and submitted to identification and cluster analysis of spectra. The obtained results highlighted the correct identification of Acanthamoeba strains and the overlapping of spectra dendrogram clusters to the 18S genotype assignations. In conclusion, the MALDI-TOF MS Biotyper revealed the capability to identify and genotype the Acanthamoeba strains, providing a new frontier in the diagnostic identification of amaebae and in taxonomic and phylogenetic studies.


Asunto(s)
Queratitis por Acanthamoeba/parasitología , Acanthamoeba/clasificación , Acanthamoeba/aislamiento & purificación , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción , Acanthamoeba/genética , Acanthamoeba/crecimiento & desarrollo , Análisis por Conglomerados , ADN Protozoario/química , ADN Protozoario/aislamiento & purificación , ADN Ribosómico/genética , Genotipo , Técnicas de Genotipaje/métodos , Técnicas de Genotipaje/normas , Humanos , Fenotipo , Filogenia , Reacción en Cadena de la Polimerasa , Proteómica/métodos , ARN Ribosómico 18S/genética , Reproducibilidad de los Resultados
16.
Am J Gastroenterol ; 110(9): 1265-87; quiz 1288, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26303132

RESUMEN

Bleeding from the small intestine remains a relatively uncommon event, accounting for ~5-10% of all patients presenting with gastrointestinal (GI) bleeding. Given advances in small bowel imaging with video capsule endoscopy (VCE), deep enteroscopy, and radiographic imaging, the cause of bleeding in the small bowel can now be identified in most patients. The term small bowel bleeding is therefore proposed as a replacement for the previous classification of obscure GI bleeding (OGIB). We recommend that the term OGIB should be reserved for patients in whom a source of bleeding cannot be identified anywhere in the GI tract. A source of small bowel bleeding should be considered in patients with GI bleeding after performance of a normal upper and lower endoscopic examination. Second-look examinations using upper endoscopy, push enteroscopy, and/or colonoscopy can be performed if indicated before small bowel evaluation. VCE should be considered a first-line procedure for small bowel investigation. Any method of deep enteroscopy can be used when endoscopic evaluation and therapy are required. VCE should be performed before deep enteroscopy if there is no contraindication. Computed tomographic enterography should be performed in patients with suspected obstruction before VCE or after negative VCE examinations. When there is acute overt hemorrhage in the unstable patient, angiography should be performed emergently. In patients with occult hemorrhage or stable patients with active overt bleeding, multiphasic computed tomography should be performed after VCE or CTE to identify the source of bleeding and to guide further management. If a source of bleeding is identified in the small bowel that is associated with significant ongoing anemia and/or active bleeding, the patient should be managed with endoscopic therapy. Conservative management is recommended for patients without a source found after small bowel investigation, whereas repeat diagnostic investigations are recommended for patients with initial negative small bowel evaluations and ongoing overt or occult bleeding.


Asunto(s)
Endoscopía Capsular/métodos , Colonoscopía/métodos , Manejo de la Enfermedad , Hemorragia Gastrointestinal/diagnóstico , Hemorragia Gastrointestinal/terapia , Intestino Delgado , Tomografía Computarizada por Rayos X/métodos , Humanos , Estados Unidos
17.
Clin Gastroenterol Hepatol ; 12(4): 609-15, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24075891

RESUMEN

BACKGROUND & AIMS: Evaluation of the small intestine for inflammation has traditionally relied on small-bowel follow-through (SBFT), but multiple studies have demonstrated its low diagnostic accuracy. Capsule endoscopy (CE) transmits high-quality images of the small intestinal mucosa; it can be used to visualize the entire length of the small bowel and much of the mucosa. We compared the diagnostic yields of CE vs SBFT in a prospective study of patients with suspected small-bowel Crohn's disease. METHODS: Eighty patients with signs and/or symptoms of small-bowel Crohn's disease (age, 10-65 years) underwent CE, followed by SBFT and ileocolonoscopy. Readers were blinded to other test results. The primary outcome was the diagnostic yield for inflammatory lesions found with CE before ileocolonoscopy compared with SBFT and ileocolonoscopy. A secondary outcome was the incremental diagnostic yield of CE compared with ileocolonoscopy and CE compared with SBFT. RESULTS: The combination of CE and ileocolonoscopy detected 107 of 110 inflammatory lesions (97.3%), whereas the combination of SBFT and ileocolonoscopy detected only 63 lesions (57.3%) (P < .001). The diagnostic yield of CE compared with ileocolonoscopy was not different (P = .09). The diagnostic yield was higher for CE than for SBFT (P < .001). Of the 80 patients with suspected Crohn's disease, 25 (31.3%) had the diagnosis confirmed. Eleven were diagnosed by CE findings alone and 5 by ileocolonoscopy findings alone. In the remaining 9 patients, diagnostic findings were identified by at least 2 of the 3 modalities. No diagnoses were made on the basis of SBFT findings alone. CONCLUSIONS: CE was better than SBFT and equivalent to ileocolonoscopy in detecting small-bowel inflammation. Although ileocolonoscopy remains the initial diagnostic test of choice, CE is safe and can establish the diagnosis of Crohn's disease in patients when ileocolonoscopy results are negative or the terminal ileum cannot be evaluated. ClinicalTrials.gov Number: NCT00487396.


Asunto(s)
Endoscopía Capsular/métodos , Enfermedad de Crohn/diagnóstico , Enfermedad de Crohn/patología , Endoscopía Gastrointestinal/métodos , Intestino Delgado/patología , Adolescente , Adulto , Anciano , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Adulto Joven
18.
Gastrointest Endosc ; 90(4): 702-703, 2019 10.
Artículo en Inglés | MEDLINE | ID: mdl-31540642
19.
Gastrointest Endosc ; 79(4): 669-74, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24424401

RESUMEN

BACKGROUND: Wireless video capsule endoscopy allows the noninvasive visualization of the small intestine. Currently, capsules do not provide localization information while traversing the GI tract. OBJECTIVE: To report on the radiological validation of 3-dimensional localization software incorporated in a newly developed capsule. By using radiofrequency transmission, the software measures the strength of the capsule's signal to locate the position of the capsule. SETTING: This study was performed at the University of Massachusetts Medical Center, Worcester, Mass. PATIENTS: Thirty healthy volunteers consented to the experimental procedure. DESIGN: After ingestion of the capsule, subjects had 5 sets of anteroposterior and lateral radiographs taken every 30 minutes while the software calculated the position of the capsule. By using the radiographs, we calculated the location of the capsule in the abdominal cavity and compared the results with those generated by the software. RESULTS: Average error (and standard deviation) among the 3-dimensional coordinates was X, 2.00 cm (1.64); Y, 2.64 cm (2.39); and Z, 2.51 cm (1.83). The average total spatial error among all measurements was 13.26 cm(3) (22.72). There was a correlation between increased subject body mass index and the 3-dimensional software measurement error. LIMITATIONS: This study was performed in healthy volunteers and needs further validation in patients with small intestinal disorders. CONCLUSIONS: The new 3-dimensional software provides localization of the capsule consistent with radiological observations. However, further validation of the software's clinical utility is required with a prospective clinical trial.


Asunto(s)
Cavidad Abdominal/diagnóstico por imagen , Endoscopía Capsular , Imagenología Tridimensional , Intensificación de Imagen Radiográfica , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Programas Informáticos
20.
Nutr J ; 13: 5, 2014 Jan 16.
Artículo en Inglés | MEDLINE | ID: mdl-24428901

RESUMEN

BACKGROUND: The Anti-Inflammatory Diet (IBD-AID) is a nutritional regimen for inflammatory bowel disease (IBD) that restricts the intake of certain carbohydrates, includes the ingestion of pre- and probiotic foods, and modifies dietary fatty acids to demonstrate the potential of an adjunct dietary therapy for the treatment of IBD. METHODS: Forty patients with IBD were consecutively offered the IBD-AID to help treat their disease, and were retrospectively reviewed. Medical records of 11 of those patients underwent further review to determine changes in the Harvey Bradshaw Index (HBI) or Modified Truelove and Witts Severity Index (MTLWSI), before and after the diet. RESULTS: Of the 40 patients with IBD, 13 patients chose not to attempt the diet (33%). Twenty-four patients had either a good or very good response after reaching compliance (60%), and 3 patients' results were mixed (7%). Of those 11 adult patients who underwent further medical record review, 8 with CD, and 3 with UC, the age range was 19-70 years, and they followed the diet for 4 or more weeks. After following the IBD-AID, all (100%) patients were able to discontinue at least one of their prior IBD medications, and all patients had symptom reduction including bowel frequency. The mean baseline HBI was 11 (range 1-20), and the mean follow-up score was 1.5 (range 0-3). The mean baseline MTLWSI was 7 (range 6-8), and the mean follow-up score was 0. The average decrease in the HBI was 9.5 and the average decrease in the MTLWSI was 7. CONCLUSION: This case series indicates potential for the IBD-AID as an adjunct dietary therapy for the treatment of IBD. A randomized clinical trial is warranted.


Asunto(s)
Enfermedades Inflamatorias del Intestino/dietoterapia , Adulto , Anciano , Antiinflamatorios/uso terapéutico , Fibras de la Dieta/efectos adversos , Humanos , Intestinos/microbiología , Persona de Mediana Edad , Cooperación del Paciente , Probióticos/administración & dosificación , Estudios Retrospectivos , Autoinforme
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