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1.

Introduction

MED13L-related intellectual disability is characterized by moderate intellectual disability (ID), speech impairment, and dysmorphic facial features. We present 8 patients with MED13L-related intellectual disability and review the literature for phenotypical and genetic aspects of previously described patients.

Materials and methods

In the search for genetic aberrations in individuals with ID, two of the patients were identified by chromosomal microarray analysis, and five by exome sequencing. One of the individuals, suspected of MED13L-related intellectual disability, based on clinical features, was identified by Sanger sequencing.

Results

All 8 individuals had de novo MED13L aberrations, including two intragenic microdeletions, two frameshift, three nonsense variants, and one missense variant. Phenotypically, they all had intellectual disability, speech and motor delay, and features of the mouth (open mouth appearance, macroglossia, and/or macrostomia). Two individuals were diagnosed with autism, and one had autistic features. One had complex congenital heart defect, and one had persistent foramen ovale. The literature was reviewed with respect to clinical and dysmorphic features, and genetic aberrations.

Conclusions

Even if most clinical features of MED13L-related intellectual disability are rather non-specific, the syndrome may be suspected in some individuals based on the association of developmental delay, speech impairment, bulbous nasal tip, and macroglossia, macrostomia, or open mouth appearance.  相似文献   

2.

Background

Leptospirosis is under-diagnosed by clinicians in many high-incidence countries, because reference diagnostic tests are largely unavailable. Lateral flow assays (LFA) that use antigen derived from heat-treated whole cell Leptospira biflexa serovar Patoc have the potential to improve leptospirosis diagnosis in resource-limited settings.

Objectives

We sought to summarize estimates of sensitivity and specificity of LFA by conducting a systematic review and meta-analysis of evaluations of the accuracy of LFA to diagnose human leptospirosis.

Data sources

On 4 July 2017 we searched three medical databases.Study eligibility criteriaArticles were included if they were a study of LFA sensitivity and specificity.

Participants

Patients with suspected leptospirosis.

Interventions

Nil.

Methods

For included articles, we assessed study quality, characteristics of participants and diagnostic testing methods. We estimated sensitivity and specificity for each study against the study-defined case definition as the reference standard, and performed a meta-analysis using a random-effects bivariate model.

Results

Our search identified 225 unique reports, of which we included nine (4%) published reports containing 11 studies. We classified one (9%) study as high quality. Nine (82%) studies used reference tests with considerable risk of misclassification. Our pooled estimates of sensitivity and specificity were 79% (95% CI 70%–86%) and 92% (95% CI 85%–96%), respectively.

Conclusions

As the evidence base for determining the accuracy of LFA is small and at risk of bias, pooled estimates of sensitivity and specificity should be interpreted with caution. Further studies should use either reference tests with high sensitivity and specificity or statistical techniques that account for an imperfect reference standard.  相似文献   

3.

Background

Penicillin allergy is the most commonly reported drug allergy in hospitalized patients, resulting in increased second-line antibiotic use, nosocomial infections, and health care use. Given that most patients are not truly allergic, a safe strategy that empowers the admitting physician is needed.

Objective

To assess the effect on antibiotic prescribing practices for hospitalized patients with penicillin allergy using a validated intervention.

Methods

An intervention was implemented to educate health care professionals on management of patients with penicillin allergy using a validated risk stratification algorithm to guide testing and antibiotic use. Thirty days of control data using current standard of care was compared with 60 days of postintervention data measuring documentation of penicillin allergy history and antibiotic selection.

Results

The relative use of cephalosporin and penicillin antibiotics increased by 121.2% (P = .03) and 256% (P = .04), respectively, without an increase in adverse drug reactions. There was a decrease in the use of broad-spectrum antibiotics: vancomycin, 67.2% (P = .04); quinolones, 33.3% (P = .31); carbapenems, 81.9% (P = .08); and aztreonam, 73.8% (P = .18).

Conclusion

The antibiotic choice in patients admitted to the hospital with a reported penicillin allergy can be improved by better evaluation of the allergy history and the use of a risk stratification guideline.  相似文献   

4.
5.

Background

Intensive care unit (ICU) admission is a risk factor for fatal asthma. Little is known about risk factors for pediatric ICU admissions for asthma.

Objective

To examine characteristics of underserved minority children with prior ICU admissions for asthma.

Methods

Baseline survey data, salivary cotinine levels, and allergen specific IgE serologic test results were obtained from children with uncontrolled asthma enrolled in a randomized clinical trial of a behavioral education environmental control intervention. Characteristics of children with and without prior ICU admission were compared using χ2 and t tests. Logistic regression assessed significance of higher odds of prior ICU admission comparing factor-level categories.

Results

Patients included 222 primarily African American (93.7%), male (56%), Medicaid-insured (92.8%) children with a mean (SD) age of 6.4 (2.7) years with uncontrolled asthma. Most (57.9%) had detectable cotinine levels, 82.6% were sensitized to more than 1 environmental allergen, and 27.9% had prior ICU admissions. Prior ICU patients were more likely to be very poor (<$10,000 per year) and sensitized to more than 1 allergen tested (most importantly mouse) (P < .05). Allergen sensitization in the groups did not differ for cockroach, cat, dog, Alternaria, Aspergillus, dust mite, grass, or tree. Although more ICU patients received combination controller therapy, they also overused albuterol. Only 27.4% of ICU patients received specialty care in the previous 2 years, which was not significantly different from non-ICU patients.

Conclusion

Children with high mortality risk, including history of ICU admission, were twice as likely to live in extreme poverty, have atopy (particularly mouse allergen), use combination controller therapy, and overuse albuterol.

Trial Registration

ClinicalTrials.gov Identifier: NCT01981564.  相似文献   

6.

Background

Dyslipidemia is among the most significant risk factors of cardiovascular disease. Many patients with dyslipidemia fail to meet certain therapeutic targets as a result of clinical inertia.

Aims

To explore the views and opinions of physicians who often see and provide healthcare to patients with dyslipidemia on clinical inertia and to achieve consensus on the factors they believed promote clinical inertia in the Palestinian clinical practice.

Methods

This study was conducted in an observational design using the Delphi technique as a formal consensus method. A panel of fifty physicians participated this study. A two Delphi rounds were followed to achieve consensus on a list of factors they believed promoted clinical inertia.

Results

The majority (86%) of the panelists believed that clinical inertia was prevalent in caring for patients with dyslipidemia. Of the 40 factors initially included in the questionnaire, consensus was achieved on 21 (52.5%) factors related to the physician, 10 (25.0%) factors related to the patient, and 5 (12.5%) factors related to the office and healthcare system as promoters of clinical inertia in the first and second Delphi rounds.

Discussion

This study highlights factors promoting clinical inertia in managing dyslipidemia from the views of physicians who often provide healthcare to patients with dyslipidemia.

Conclusion

Consensus was achieved on factors related to the physician, patient, and healthcare system that promote clinical inertia in caring for patients with dyslipidemia in the Palestinian clinical practice by a panel of physicians who often provide healthcare to those patients. Further studies are still needed to design strategies to eliminate or reduce the phenomenon of clinical inertia in caring for patients with dyslipidemia and improve patient outcomes.  相似文献   

7.

Background

Encephalitis and meningoencephalitis are severe, sometime life-threatening infections of the central nervous system. Travellers may be exposed to a variety of neurotropic pathogens.

Aims

We propose to review known infectious causes of encephalitis in adults acquired outside Europe, and how to identify them.

Sources

We used Pubmed and Embase, to search the most relevant publications over the last years.

Content

Microbiologic tests and radiological tools to best identify the causative pathogen in travellers presenting with encephalitis and ME are presented in this narrative review, as well as a diagnostic approach tailored to the visited area and types of exposures.

Implications

This review highlights the diagnostic difficulties inherent to exotic causes of central nervous system infections, and attempts to guide clinicians with respect to which microbiological tests to consider, in addition to brain MRI, when approaching a returning traveller presenting with encephalitis.  相似文献   

8.

Objective

To review the published medical literature on the clinical presentation, risk factors, and natural history of hypersensitivity reactions to progestogens.

Data Sources

Through the use of PubMed, we conducted a review of allergy, dermatology, and obstetric literature for cases and case series of patients with hypersensitivity reactions to exogenous or endogenous progestogens. There are no longitudinal, prospective studies related to progestogen hypersensitivity.

Study Selections

Publications were selected that described cases that were clinically consistent with progesterone hypersensitivity and positive test results or clear symptoms with exposure to progestogens to confirm the diagnosis.

Results

Progestogen hypersensitivity symptoms can be triggered by endogenous progesterone or exogenous progestins used for contraception or fertility treatments. Symptoms are varied and include dermatitis, urticaria, asthma, and anaphylaxis.

Conclusion

Although the medical literature on progestogen hypersensitivity is limited to case reports and small case series, significant heterogeneity exists in clinical presentation among patients.  相似文献   

9.

Background

Encephalitis and meningoencephalitis imply inflammation of the brain parenchyma, and comprise many diagnostic entities, such as various infections and causes of dysimmunity. The cause remains unknown in around 50% of cases.

Objectives

To summarize the main infectious causes of encephalitis and meningoencephalitis acquired in Europe, and the diagnostic means to identify them.

Sources

PubMed, ECDC and WHO websites, personal experience.

Content

The principal infectious causes of encephalitis and meningoencephalitis acquired in Europe in adults are discussed in this review, with special emphasis on the microbiological and imaging diagnostic approaches. The role of electroencephalography in diagnosing encephalitis is also mentioned. Among infections, viruses are more frequent than other pathogen types, and their epidemiology varies according to geographic area. A few bacteria, such as Listeria monocytogenes and Mycobacterium tuberculosis, are also to be considered. In contrast, parasites and fungi are rare encephalitis causes in Europe.

Implications

Identifying the causative pathogen of infectious encephalitis and meningoencephalitis is complex because of the variety of pathogens, the epidemiology of which is determined by geography and environmental factors. Furthermore, despite extensive microbiological testing, many cases of encephalitis remain of unknown origin. Brain magnetic resonance imaging and electroencephalography are useful complementary diagnostic tools, and newer unbiased sequencing technologies might help to fill in the diagnostic gap.  相似文献   

10.

Background/Aim

Primary ovarian insufficiency (POI) is characterized by primary or secondary amenorrhea, infertility, low estradiol levels, and increased gonadotropin levels. Most cases of POI remain unsolved even after exhaustive investigation. Here, we performed a targeted massively parallel sequencing to identify the genetic diagnosis of primary ovarian insufficiency (POI) in a Brazilian patient.

Patient and methods

An adopted 21-year-old Brazilian woman with isolated POI was selected. A custom SureSelectXT DNA target enrichment panel was designed and sequenced on an Illumina NextSeq 500 sequencer. The variants were confirmed using Sanger sequencing.

Results

Two rare heterozygous pathogenic variants in the STAG3 gene were identified in our patient. An unpublished 1-bp duplication c.291dupC (p.Asn98Glnfs*2) and one stop codon variant c.1950C > A (p.Tyr650*) were identified in the STAG3 gene. Both undescribed heterozygous variants were absent in the public databases [1000Genomes, Exome Aggregation Consortium (ExAC), National Heart, Lung, and Blood Institute Exome Variant Server (NHLBI/EVS), database of Single Nucleotide Polymorphisms (dbSNP), Genome Aggregation Database (gnomAD)], and Online Archive of Brazilian Mutations (ABraOM) databases. Moreover, neither heterozygous variants were found in 400 alleles from fertile Brazilian women screened by Sanger sequencing. The parents' DNA was not available to segregate these variants.

Conclusion

Our results suggested that POI is caused by pathogenic compound heterozygous variants in the STAG3 gene, supporting the key role of the STAG3 gene in the etiology of primary ovarian insufficiency.  相似文献   

11.

Background

Variants in GBA are the most common genetic risk factor for Parkinson's disease (PD), and are especially prevalent in the Ashkenazi Jewish (AJ) population. However, most studies on GBA in AJ genotype only seven selected Gaucher-associated pathogenic variants rather than sequencing the whole gene, which may leave carriers of PD-associated GBA variants undiscovered.

Methods

GBA was fully sequenced using molecular inversion probes (MIPs) and Sanger sequencing in 735 AJ PD patients and 662 AJ controls, from Israel and New York. Additional AJ control data (n?=?3044) from the Inflammatory Bowel Disease Exome Portal was used.

Results

Full GBA sequencing increased the number of variants discovered by 17.4%, compared to targeted genotyping. An additional 17 PD patients were identified with GBA-associated PD. The p.E326K variant was found in 1.6% of AJ PD patients, making it the second most common PD-associated GBA variant in AJ. GBA variants were found in 18% of PD patients and 7.5% of controls (OR?=?2.7, 95%CI?=?1.9–3.8, p?<?0.0001).

Conclusion

Without full sequencing of GBA, or at minimum including p.E326K in the genotyping panel, a significant proportion of variant carriers go undiscovered and may be incorrectly assigned as non-carriers in studies or clinical trials.  相似文献   

12.

Background

The development of an in vitro diagnostic test from a good idea to a clinically relevant tool takes several steps, with more stringent requirements at every step.

Objectives

This article aims to summarize the necessary questions to be asked about a test and to illustrate study designs answering these questions. We also aim to relate Regulation (EU) 2017/746 to the needs of evidence-based diagnostic testing, where applicable.

Sources

We used literature on evidence-based diagnostics, a text book on clinical trials in the development and marketing of medical devices and the English version of Regulation 2017/746 of the European Parliament and of the Council on in vitro diagnostic medical devices.

Content

The combination of different test uses and different stages of development determine the required test characteristics and suitability of study designs. In an earlier stage of test development it may be crucial to know whether a test can differentiate diseased persons from healthy controls, although this tells us little about how a test will perform in practice. Later stages focus on the diagnostic accuracy of a test in a clinically relevant situation. However, a test that perfectly distinguishes between patients with and without a certain condition may still have little effect on patient outcomes. Therefore, randomized controlled trials of testing may be needed, as well as post-marketing monitoring.

Implications

Both researchers and users of tests need to be aware of the limitations of diagnostic test accuracy and realize that accuracy is only indirectly linked to people's health status.  相似文献   

13.

Objective

This article reviews the latest science and epidemiologic studies related to drug allergy in children and adults to explore possible mechanisms related to female propensity for drug allergy.

Data Sources

PubMed literature review, focusing primarily on the last 5 years.

Study Selections

Articles reviewing the science behind female predisposition to atopic and asthmatic conditions and epidemiologic studies reviewing drug allergy and drug-induced anaphylaxis.

Results

Despite adult female predilection for atopic conditions, few laboratory studies explore sex-specific mechanisms in atopic/allergic diseases, and most are focused on autoimmunity and asthma. Drug allergy is more frequently reported in adult females compared with adult males. Adult females are also more likely to have drug-induced anaphylaxis (DIA), although no clear sex predominance has been reported in fatal or severe DIA. Studies in children suggest the reverse picture, with prepubertal males more likely to have drug allergy and DIA than prepubertal girls.

Conclusion

Possible explanations for female predisposition for drug allergy are multifactorial and include disproportionate utilization of health care with more exposure to antibiotics or medications, genetic factors related to the X chromosome, epigenetic changes, and discrepant hormonal interactions with immune cells.  相似文献   

14.
15.

Background

Developmental delay (DD) is a neurological disorder that presents with defects in gross motor, fine motor, language and cognition functions. WD repeat domain 45 (WDR45) is one of the disease-causing genes of DD. Previously, WDR45 de novo mutations were reported in certain adult and pediatric patients due to iron accumulation.

Clinical report

We report five pediatric female patients with DD and epilepsy. Their ages were below 3?years?at the first consultation, and precise diagnoses were difficult based on the available clinical information and phenotype.

Methods

Children with DD and/or epilepsy presenting to the molecular diagnostic center of Children's Hospital of Fudan University between May 2016 and May 2017 were enrolled. The patients and their parents were subjected to whole-exome sequencing (WES), and we characterized the phenotypes of the patients carrying WDR45 variants. Furthermore, we overexpressed the candidate variants in HeLa cells and evaluated their effect on autophagy through Western blot and immunofluorescence staining with confocal microscopy.

Results

Five WDR45 de novo mutations, namely, c.19C > T (p.Arg7*), c.401G > C (p.Arg134Pro), c.503G > A (p.Gly168Glu), c.700C > T (p.Arg234*), and c.912delT (p.Ala305Leufs*25), were detected in 623 enrolled pediatric patients (274 females; 487 patients younger than 6 years). All five patients with WDR45 variants presented with DD and epilepsy. Compared with the control HeLa cells, the cells with the p. Arg134Pro and p. Gly168Glu missense mutations showed accumulation of LC3-containing autophagic structures and an abnormally enlarged cell volume, and Western blotting revealed a significant increase in LC3II/GAPDH.

Conclusion

The identification of WDR45 mutations provides further evidence that WES plays an important role in the diagnosis of neurological disorders with common phenotypes and that WDR45 mutations are associated with neurological disorders and are not very rare in Chinese female pediatric patients with DD and/or epilepsy. The diagnosis of patients with WDR45 mutations would enable more precise genetic counseling for the parents of these children.  相似文献   

16.

Objective

To review the current state of the literature regarding the socioeconomics of atopic dermatitis (AD)—more specifically how socioeconomic status (SES) affects AD risk and how the presence of AD may affect one’s SES—as well as discuss the cost of the disease to society.

Data Sources

A PubMed search was performed to include English-language articles with the keywords atopic dermatitis, cost, finances, economic, income, career, socioeconomic, with preference to those written in the last 5 years.

Study Selections

Studies were included if they provided information pertaining to socioeconomics in relation to disease severity, disease incidence, direct costs, indirect costs, and effects on work, education, and career choice.

Results

Many studies have reported that higher SES is associated with increased AD prevalence, whereas lower SES is associated with increased AD severity. Regardless of patient SES, AD creates substantial direct costs that affect the patient, patient’s family, and the payer. Additionally, the effects of the disease create indirect costs from absenteeism and presenteeism, as well as opportunity costs from hinderances in learning, affecting patient SES and the economy.

Conclusion

Given the substantial and growing burden on the patient and the economy when access to appropriate treatment is limited, the socioeconomic burden of AD represents a tangible public health concern that must be addressed.  相似文献   

17.

Background

Rhodococcus equi is a recognized cause of disease in humans, especially in individuals who are immunocompromised. Because diphtheroids are regarded as part of normal respiratory flora, the importance of R. equi as a pulmonary pathogen may not be fully appreciated and its prevalence may be underestimated. Most treatment recommendations for R. equi infection were established before antiretroviral drugs became available for human immunodeficiency virus/AIDS therapy, and therapeutic strategies may need to be updated.

Objectives

To review the role of R. equi as a cause of pulmonary infection; to highlight its importance for clinicians and microbiologists; and to challenge current approaches to treatment, whether in immunodeficient or immunocompetent individuals.

Sources

A PubMed search using combinations of the following terms: ‘Rhodococcus (automatically including Corynebacterium) equi’ AND ‘pneumonia’ OR ‘pulmonary’ infection, then cross-checking references in the resulting cases, case series and reviews.

Content

We provide a review that details the challenges in the diagnosis, microbiology and pathogenesis of pulmonary infection caused by R. equi and the options for treatment.

Implications

Ten to 14 days of treatment may be effective for pneumonia due to R. equi. Our review suggests that longer courses of therapy are needed for cavitary lesions and lung masses. However, recommendations for excessively prolonged treatment of all pulmonary infections arose during a time when many cases occurred in individuals with AIDS and before effective antiretroviral therapy was available. We suggest that the rationale for prolonged therapy with multiple antibiotics needs to be re-evaluated.  相似文献   

18.

Background

Data on the prevalence of allergic disorders over time are limited. Recent studies have noted marked increase in the prevalence of allergic conditions in different parts of the world.

Objective

To examine time trends in the prevalence of anaphylaxis, angioedema, and urticaria in the United States.

Methods

Using the largest inpatient National Inpatient Sample data in the United States from 2001 to 2014, adults admitted with a primary diagnosis of anaphylaxis, angioedema, or urticaria were identified based on International Classification of Diseases, Ninth Revision codes. Yearly distribution of hospital admissions was stratified per different age groups, and yearly trends of hospitalizations related to anaphylaxis, angioedema, and urticaria were calculated.

Results

Although an increasing trend in the rate of hospitalizations was seen for angioedema (annual percentage change [APC], 4.48), a decreasing trend (APC, ?2.19) was observed for urticaria-related hospitalizations. Overall anaphylaxis-related hospitalizations were noted to be stable, but a significant increasing trend was observed among those aged 5 to 14 years (APC, 4.19), mostly because of the subgroup of food-related hospitalizations (APC, 5.86). Angioedema-related hospitalizations were highest among the 35- to 64-year age group (APC, 5.38).

Conclusion

An increasing trend of hospitalizations has been observed for allergic conditions, with varying age distribution according to the nature of eliciting agent and susceptibility of different age groups. Although angioedema has been observed as an increasing problem in older populations, food-induced anaphylaxis is an increasing concern in the younger population.  相似文献   

19.

Background

The paucity of licensed monoclonal antibodies (mAbs) in the infectious diseases arena strongly contrasts with the ready availability of these therapeutics for use in other conditions.

Aims

This narrative review aims to assess the potential of monoclonal antibody-based interventions for infectious diseases.

Sources

A review of the literature via the Medline database was performed and complemented by published official documents on licensed anti-infective mAbs. In addition, ongoing trials were identified through a search of the clinical trial registration platform ClinicalTrials.gov.

Content

We identified the few infections for which mAbs have been added to the therapeutic armamentarium and stressed their potential in representing a readily available protection tool against biothreats and newly emerging and reemerging infectious agents. In reviewing the historical context and main features of mAbs, we assert a potentially wider applicability and cite relevant examples of ongoing therapeutic developments. Factors hindering successful introduction of mAbs on a larger scale are outlined and thoughts are offered on how to possibly address some of these limitations.

Implications

mAbs may represent important tools in treating or preventing infections occurring with reasonably sufficient prevalence to justify demand and for which existing alternatives are not deemed fully adequate. Future initiatives need to address the prohibitive costs encountered in the development process. The feasibility of more large-scale administration of alternative modalities merits further exploration. In order to ensure optimal prospect of regulatory success, an early dialogue with competent authorities is encouraged.  相似文献   

20.

Background

Disease activity may correlate with environmental aeroallergen exposure in eosinophilic esophagitis. The association between seasons and flares of eosinophilic esophagitis (EoE) histologic activity has not been extensively studied.

Objective

We aimed to assess the frequency of seasonal exacerbations of eosinophilic esophagitis, as well as changes in symptom reporting, endoscopic findings, and histologic findings attributed to aeroallergens in an EoE cohort.

Methods

In this retrospective cohort study, we analyzed EoE patients in histologic remission (<15 eosinophil/high-power field) but who doubled the esophageal eosinophil count between seasons without change in eosinophilic esophagitis–specific therapy. Outcomes were: symptomatic global worsening (yes/no); change in endoscopic severity (EREFS scoring system); and histologic change (peak eosinophil count).

Results

Of 782 patients, 13 (4%) met inclusion criteria (mean age: 36.2; 85% male; 86% white; 85% atopic disease diagnosis), and 14 exacerbations were recorded. Of these, 71% occurred in fall and summer months. Peak eosinophil counts increased from 6.8 to 86.8 eosinophil per high-power field (P < .001). Four patients (31%) reported worsening of seasonal allergies and 5 (38%) a global worsening of symptoms. Endoscopic severity was also significantly worse during seasonal exacerbations (total EREFS 3.7 vs 1.7; P = .01). Baseline features differed by atopic diagnoses and endoscopic findings between patients with and without seasonal exacerbations.

Conclusion

Seasonal exacerbations of eosinophilic esophagitis were uncommon in this cohort and most commonly recorded over the summer and fall months. These data support a role of aeroallergens in the pathogenesis of eosinophilic esophagitis in some patients, and clinicians should consider aeroallergens as a potential cause of disease exacerbation.  相似文献   

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