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1.
Insect Mol Biol ; 31(5): 537-542, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-35927970

RESUMEN

The choice of criteria to delimit a group or class is a subjective matter, even though the reasoning, the objectives and the criteria themselves should always be clearly stated. This paper is part of a discussion about the criteria used to identify seminal fluid proteins (SFPs) in Drosophila species. SFPs are proteins that are transferred to females during copulation together with sperm. The only way to ascertain that a protein is an SFP is to prove that it is produced in a male reproductive organ and is found in the female reproductive tract after insemination. Nevertheless, the required methodology is labour-intensive and expensive, and therefore this kind of data is unlikely to be available for many species, precluding comparative and evolutionary studies on the subject. To conduct evolutionary analyses, in a previous study, we capitalized on the accumulated knowledge we have in the model species D. melanogaster to recommend a set of criteria for identifying candidate SFPs in other Drosophila species. Those criteria, based on transcriptomic evidence and in silico predictions from sequences, would allow a good balance between sensitivity (the inclusion of true SFPs) and specificity (the exclusion of false positives). In view of the criticism raised by another group, here we defend our criteria on one hand while accepting there is room for improvement on the other. The results are updated sets of criteria and SFPs that we believe can be useful in future evolutionary studies.


Asunto(s)
Proteínas de Drosophila , Drosophila melanogaster , Animales , Drosophila/metabolismo , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/fisiología , Femenino , Masculino , Semen/metabolismo , Proteínas de Plasma Seminal/genética , Proteínas de Plasma Seminal/metabolismo
2.
Insect Mol Biol ; 31(2): 139-158, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-34747062

RESUMEN

While the striking effects of seminal fluid proteins (SFPs) on females are fairly conserved among Diptera, most SFPs lack detectable homologues among the SFP repertoires of phylogenetically distant species. How such a rapidly changing proteome conserves functions across taxa is a fascinating question. However, this and other pivotal aspects of SFPs' evolution remain elusive because discoveries on these proteins have been mainly restricted to the model Drosophila melanogaster. Here, we provide an overview of the current knowledge on the inter-specific divergence of the SFP repertoire in Drosophila and compile the increasing amount of relevant genomic information from multiple species. Capitalizing on the accumulated knowledge in D. melanogaster, we present novel sets of high-confidence SFP candidates and transcription factors presumptively involved in regulating the expression of SFPs. We also address open questions by performing comparative genomic analyses that failed to support the existence of many conserved SFPs shared by most dipterans and indicated that gene co-option is the most frequent mechanism accounting for the origin of Drosophila SFP-coding genes. We hope our update establishes a starting point to integrate further data and thus widen the understanding of the intricate evolution of these proteins.


Asunto(s)
Proteínas de Drosophila , Animales , Drosophila/genética , Drosophila/metabolismo , Proteínas de Drosophila/genética , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/fisiología , Femenino , Proteoma/metabolismo , Proteínas de Plasma Seminal/genética , Proteínas de Plasma Seminal/metabolismo
3.
Infection ; 50(5): 1321-1328, 2022 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-35562568

RESUMEN

PURPOSE: Assess the impact of viral load estimated by cycle threshold (Ct) of reverse transcription real time-polymerase chain reaction (rRT-PCR) and the days from symptoms onset on mortality in hospitalized patients with COVID19. METHODS: Retrospective observational study of 782 patients with a positive rRT-PCR from a nasopharyngeal swab was performed within the first 24 h from admission. Demographic data, clinical manifestations and laboratory parameters were collected. Uni- and multivariate analyses were performed to identify factors associated with mortality at 60 days. RESULTS: Ct was divided into three groups and the mortality rate decreased from 27.3 to 20.7% and 9.8% for Ct values of ≤ 20, 21-25 and > 25, respectively (P = 0.0001). The multivariate analysis identified as predictors of mortality, a Ct value < 20 (OR 3.13, CI 95% 1.38-7.10), between 21-25 (OR 2.47, CI 95% 1.32-4.64) with respect to a Ct value > 25. Days from symptoms onset is a variable associated with mortality as well (DSOA) ≤ 6 (OR 1.86, CI 95% 1.00-3.46), among other factors. Patients requiring hospital admission within 6 DSOA with a Ct value ≤ 25 had the highest mortality rate (28%). CONCLUSIONS: The inclusion of Ct values and DSOA in the characterization of study populations could be a useful tool to evaluate the efficacy of antivirals.


Asunto(s)
COVID-19 , SARS-CoV-2 , Antivirales , Hospitales , Humanos , Carga Viral
4.
Int Tinnitus J ; 25(2): 169-171, 2022 Mar 03.
Artículo en Inglés | MEDLINE | ID: mdl-35239301

RESUMEN

This systematic review was carried out in order to highlight the implementation of ozone therapy as a treatment for nocturnal tinnitus. It is important to note that ozone treatment has resolved nocturnal tinnitus with 100% efficacy in previous studies, producing in turn a symptomatic improvement in the patient. From these results, a high degree of efficacy can be inferred in overcoming nocturnal tinnitus treated with ozone therapy in patients with a severe index of perception of tinnitus.


Asunto(s)
Acúfeno , Humanos , Acúfeno/tratamiento farmacológico , Acúfeno/etiología , Resultado del Tratamiento
5.
J Infect Dis ; 224(8): 1325-1332, 2021 Oct 28.
Artículo en Inglés | MEDLINE | ID: mdl-34329473

RESUMEN

BACKGROUND: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reverse-transcription polymerase chain reaction (RT-PCR) provides a highly variable cycle threshold (Ct) value that cannot distinguish viral infectivity. Subgenomic ribonucleic acid (sgRNA) has been used to monitor active replication. Given the importance of long RT-PCR positivity and the need for work reincorporation and discontinuing isolation, we studied the functionality of normalized viral loads (NVLs) for patient monitoring and sgRNA for viral infectivity detection. METHODS: The NVLs measured through the Nucleocapsid and RNA-dependent-RNA-polymerase genes and sgRNA RT-PCRs were performed in 2 consecutive swabs from 84 healthcare workers. RESULTS: The NVLs provided similar and accurate quantities of both genes of SARS-CoV-2 at 2 different timepoints of infection, overcoming Ct-value and swab collection variability. Among SARS-CoV-2-positive samples, 51.19% were sgRNA-positive in the 1st RT-PCR and 5.95% in the 2nd RT-PCR. All sgRNA-positive samples had >4 log10 RNA copies/1000 cells, whereas samples with ≤1 log10 NVLs were sgRNA-negative. Although NVLs were positive until 29 days after symptom onset, 84.1% of sgRNA-positive samples were from the first 7 days, which correlated with viral culture viability. Multivariate analyses showed that sgRNA, NVLs, and days of symptoms were significantly associated (P < .001). CONCLUSIONS: The NVLs and sgRNA are 2 rapid accessible techniques that could be easily implemented in routine hospital practice providing a useful proxy for viral infectivity and coronavirus disease 2019 patient follow-up.


Asunto(s)
COVID-19/diagnóstico , SARS-CoV-2/aislamiento & purificación , Carga Viral/normas , Adulto , Cuidados Posteriores/normas , COVID-19/terapia , COVID-19/transmisión , COVID-19/virología , Prueba de Ácido Nucleico para COVID-19/estadística & datos numéricos , Toma de Decisiones Clínicas/métodos , Monitoreo Epidemiológico , Femenino , Personal de Salud/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Nasofaringe/patología , Nasofaringe/virología , ARN Viral/aislamiento & purificación , SARS-CoV-2/genética , SARS-CoV-2/patogenicidad
6.
Clin Infect Dis ; 73(Suppl_5): S472-S479, 2021 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-34910176

RESUMEN

BACKGROUND: Infectious diseases' outbreak investigation requires, by definition, conducting a thorough epidemiological assessment while simultaneously obtaining biological samples for an adequate screening of potential responsible pathogens. Complete autopsies remain the gold-standard approach for cause-of-death evaluation and characterization of emerging diseases. However, for highly transmissible infections with a significant associated lethality, such as COVID-19, complete autopsies are seldom performed due to biosafety challenges, especially in low-resource settings. Minimally invasive tissue sampling (MITS) is a validated new approach based on obtaining postmortem samples from key organs and body fluids, a procedure that does not require advanced biosafety measures or a special autopsy room. METHODS: We aimed to review the use of MITS or similar procedures for outbreak investigation up to 27 March 2021 and their performance for evaluating COVID-19 deaths. RESULTS: After a literature review, we analyzed in detail the results of 20 studies conducted at international sites, whereby 216 COVID-19-related deaths were investigated. MITS provided a general and more granular understanding of the pathophysiological changes secondary to the infection and high-quality samples where the extent and degree of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-related damage could be evaluated. CONCLUSIONS: MITS is a useful addition in the investigation and surveillance of infections occurring in outbreaks or epidemics. Its less invasive nature makes the tool more acceptable and feasible and reduces the risk of procedure-associated contagion, using basic biosafety measures. Standardized approaches protocolizing which samples should be collected-and under which exact biosafety measures-are necessary to facilitate and expand its use globally.


Asunto(s)
COVID-19 , Autopsia , Humanos , Pandemias , SARS-CoV-2
7.
Clin Infect Dis ; 73(Suppl_5): S343-S350, 2021 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-34910173

RESUMEN

BACKGROUND: Available information on the causes of death among people living with human immunodeficiency virus (PLHIV) in low- and middle-income countries (LMICs) remains scarce. We aimed to provide data on causes of death in PLHIV from two LMICs, Brazil and Mozambique, to assess the impact of clinical misdiagnosis on mortality rates and to evaluate the accuracy of minimally invasive tissue sampling (MITS) in determining the cause of death in PLHIV. METHODS: We performed coupled MITS and complete autopsy on 164 deceased PLHIV (18 children, 36 maternal deaths, and 110 adults). HIV antibody levels and HIV RNA viral loads were determined from postmortem serum samples. RESULTS: Tuberculosis (22.7%), toxoplasmosis (13.9%), bacterial infections (13.9%), and cryptococcosis (10.9%) were the leading causes of death in adults. In maternal deaths, tuberculosis (13.9%), bacterial infections (13.9%), cryptococcosis (11.1%), and cerebral malaria (8.3%) were the most frequent infections, whereas viral infections, particularly cytomegalovirus (38.9%), bacterial infections (27.8%), pneumocystosis (11.1%), and HIV-associated malignant neoplasms (11.1%) were the leading cause among children. Agreement between the MITS and the complete autopsy was 100% in children, 91% in adults, and 78% in maternal deaths. The MITS correctly identified the microorganism causing death in 89% of cases. CONCLUSIONS: Postmortem studies provide highly granular data on the causes of death in PLHIV. The inaccuracy of clinical diagnosis may play a significant role in the high mortality rates observed among PLHIV in LMICs. MITS might be helpful in monitoring the causes of death in PLHIV and in highlighting the gaps in the management of the infections.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida , Infecciones por VIH , Adulto , Autopsia , Causas de Muerte , Niño , Humanos , Pobreza
8.
Clin Infect Dis ; 73(Suppl_5): S454-S464, 2021 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-34910166

RESUMEN

BACKGROUND: Minimally invasive tissue sampling (MITS), a postmortem procedure that uses core needle biopsy samples and does not require opening the body, may be a valid alternative to complete autopsy (CA) in highly infectious diseases such as coronavirus disease-19 (COVID-19). This study aimed to (1) compare the performance of MITS and CA in a series of COVID-19 deaths and (2) evaluate the safety of the procedure. METHODS: From October 2020 to February 2021, MITS was conducted in 12 adults who tested positive before death for COVID-19, in a standard, well-ventilated autopsy room, where personnel used reinforced personal protective equipment. In 9 cases, a CA was performed after MITS. A thorough histological evaluation was conducted, and the presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was evaluated by real-time reverse-transcription polymerase chain reaction (RT-PCR) and immunohistochemistry. RESULTS: The diagnoses provided by MITS and CA matched almost perfectly. In 9 patients, COVID-19 was in the chain of events leading to death, being responsible for diffuse alveolar damage and mononuclear T-cell inflammatory response in the lungs. No specific COVID-19 features were identified. Three deaths were not related to COVID-19. All personnel involved in MITS repeatedly tested negative for COVID-19. SARS-CoV-2 was identified by RT-PCR and immunohistochemistry in the MITS samples, particularly in the lungs. CONCLUSIONS: MITS is useful for evaluating COVID-19-related deaths in settings where a CA is not feasible. The results of this simplified and safer technique are comparable to those of CA.


Asunto(s)
COVID-19 , Autopsia , Humanos , Equipo de Protección Personal , Reacción en Cadena en Tiempo Real de la Polimerasa , SARS-CoV-2
9.
Gastrointest Endosc ; 93(3): 682-690.e4, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-32961243

RESUMEN

BACKGROUND AND AIMS: Data on colorectal EMR (C-EMR) training are lacking. We aimed to evaluate C-EMR training among advanced endoscopy fellows (AEFs) by using a standardized assessment tool (STAT). METHODS: This multicenter prospective study used a STAT to grade AEF training in C-EMR during their 12-month fellowship. Cumulative sum analysis was used to establish learning curves and competence for cognitive and technical components of C-EMR and overall performance. Sensitivity analysis was performed by varying failure rates. AEFs completed a self-assessment questionnaire to assess their comfort level with performing C-EMR at the completion of their fellowship. RESULTS: Six AEFs (189 C-EMRs; mean per AEF, 31.5 ± 18.5) were included. Mean polyp size was 24.3 ± 12.6 mm, and mean procedure time was 22.6 ± 16.1 minutes. Learning curve analyses revealed that less than 50% of AEFs achieved competence for key cognitive and technical C-EMR endpoints. All 6 AEFs reported feeling comfortable performing C-EMR independently at the end of their training, although only 2 of them achieved competence in their overall performance. The minimum threshold to achieve competence in these 2 AEFs was 25 C-EMRs. CONCLUSIONS: A relatively low proportion of AEFs achieved competence on key cognitive and technical aspects of C-EMR during their 12-month fellowship. The relatively low number of C-EMRs performed by AEFs may be insufficient to achieve competence, in spite of their self-reported readiness for independent practice. These pilot data serve as an initial framework for competence threshold, and suggest the need for validated tools for formal C-EMR training assessment.


Asunto(s)
Neoplasias Colorrectales , Gastroenterología , Competencia Clínica , Neoplasias Colorrectales/cirugía , Gastroenterología/educación , Humanos , Curva de Aprendizaje , Estudios Prospectivos
10.
BMC Infect Dis ; 21(1): 526, 2021 Jun 05.
Artículo en Inglés | MEDLINE | ID: mdl-34090384

RESUMEN

BACKGROUND: Klebsiella spp. are important pathogens associated with bacteremia among admitted children and is among the leading cause of death in children < 5 years in postmortem studies, supporting a larger role than previously considered in childhood mortality. Herein, we compared the antimicrobial susceptibility, mechanisms of resistance, and the virulence profile of Klebsiella spp. from admitted and postmortem children. METHODS: Antimicrobial susceptibility and virulence factors of Klebsiella spp. recovered from blood samples collected upon admission to the hospital (n = 88) and postmortem blood (n = 23) from children < 5 years were assessed by disk diffusion and multiplex PCR. RESULTS: Klebsiella isolates from postmortem blood were likely to be ceftriaxone resistant (69.6%, 16/23 vs. 48.9%, 43/88, p = 0.045) or extended-spectrum ß-lactamase (ESBL) producers (60.9%, 14/23 vs. 25%, 22/88, p = 0.001) compared to those from admitted children. blaCTX-M-15 was the most frequent ESBL gene: 65.3%, 9/14 in postmortem isolates and 22.7% (5/22) from admitted children. We found higher frequency of genes associated with hypermucoviscosity phenotype and invasin in postmortem isolates than those from admitted children: rmpA (30.4%; 7/23 vs. 9.1%, 8/88, p = 0.011), wzi-K1 (34.7%; 8/23 vs. 8%; 7/88, p = 0.002) and traT (60.8%; 14/23 vs. 10.2%; 9/88, p < 0.0001), respectively. Additionally, serine protease auto-transporters of Enterobacteriaceae were detected from 1.8% (pic) to 12.6% (pet) among all isolates. Klebsiella case fatality rate was 30.7% (23/75). CONCLUSION: Multidrug resistant Klebsiella spp. harboring genes associated with hypermucoviscosity phenotype has emerged in Mozambique causing invasive fatal disease in children; highlighting the urgent need for prompt diagnosis, appropriate treatment and effective preventive measures for infection control.


Asunto(s)
Antibacterianos/farmacología , Farmacorresistencia Bacteriana Múltiple/genética , Infecciones por Enterobacteriaceae/mortalidad , Klebsiella/efectos de los fármacos , Klebsiella/genética , Factores de Virulencia/genética , Autopsia , Bacteriemia/epidemiología , Bacteriemia/microbiología , Preescolar , Infecciones por Enterobacteriaceae/microbiología , Femenino , Humanos , Lactante , Recién Nacido , Klebsiella/aislamiento & purificación , Masculino , Pruebas de Sensibilidad Microbiana , Mozambique/epidemiología , beta-Lactamasas/genética
11.
Proc Natl Acad Sci U S A ; 115(26): 6685-6690, 2018 06 26.
Artículo en Inglés | MEDLINE | ID: mdl-29899149

RESUMEN

Combinatorial drug treatment strategies perturb biological networks synergistically to achieve therapeutic effects and represent major opportunities to develop advanced treatments across a variety of human disease areas. However, the discovery of new combinatorial treatments is challenged by the sheer scale of combinatorial chemical space. Here, we report a high-throughput system for nanoliter-scale phenotypic screening that formulates a chemical library in nanoliter droplet emulsions and automates the construction of chemical combinations en masse using parallel droplet processing. We applied this system to predict synergy between more than 4,000 investigational and approved drugs and a panel of 10 antibiotics against Escherichia coli, a model gram-negative pathogen. We found a range of drugs not previously indicated for infectious disease that synergize with antibiotics. Our validated hits include drugs that synergize with the antibiotics vancomycin, erythromycin, and novobiocin, which are used against gram-positive bacteria but are not effective by themselves to resolve gram-negative infections.


Asunto(s)
Técnicas Químicas Combinatorias , Descubrimiento de Drogas/métodos , Evaluación Preclínica de Medicamentos/métodos , Ensayos Analíticos de Alto Rendimiento , Dispositivos Laboratorio en un Chip , Antibacterianos/farmacología , Sinergismo Farmacológico , Eritromicina/farmacología , Escherichia coli/efectos de los fármacos , Análisis por Micromatrices , Pruebas de Sensibilidad Microbiana , Nanotecnología , Novobiocina/farmacología , Pseudomonas aeruginosa/efectos de los fármacos , Bibliotecas de Moléculas Pequeñas/farmacología , Vancomicina/farmacología
12.
J Environ Manage ; 295: 112902, 2021 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-34171775

RESUMEN

While the burden of disease from well-studied drinking water contaminants is declining, risks from emerging chemical and microbial contaminants arise because of social, technological, demographic and climatological developments. At present, emerging chemical and microbial drinking water contaminants are not assessed in a systematic way, but reactively and incidence based. Furthermore, they are assessed separately despite similar pollution sources. As a result, risks might be addressed ineffectively. Integrated risk assessment approaches are thus needed that elucidate the uncertainties in the risk evaluation of emerging drinking water contaminants, while considering risk assessors' values. This study therefore aimed to (1) construct an assessment hierarchy for the integrated evaluation of the potential risks from emerging chemical and microbial contaminants in drinking water and (2) develop a decision support tool, based on the agreed assessment hierarchy, to quantify (uncertain) risk scores. A multi-actor approach was used to construct the assessment hierarchy, involving chemical and microbial risk assessors, drinking water experts and members of responsible authorities. The concept of value-focused thinking was applied to guide the problem-structuring and model-building process. The development of the decision support tool was done using Decisi-o-rama, an open-source Python library. With the developed decision support tool (uncertain) risk scores can be calculated for emerging chemical and microbial drinking water contaminants, which can be used for the evidence-based prioritisation of actions on emerging chemical and microbial drinking water risks. The decision support tool improves existing prioritisation approaches as it combines uncertain indicator levels with a multi-stakeholder approach and integrated the risk assessment of chemical and microbial contaminants. By applying the concept of value-focused thinking, this study addressed difficulties in evidence-based decision-making related to emerging drinking water contaminants. Suggestions to improve the model were made to guide future research in assisting policy makers to effectively protect public health from emerging drinking water risks.


Asunto(s)
Agua Potable , Contaminantes Químicos del Agua , Monitoreo del Ambiente , Políticas , Medición de Riesgo , Contaminantes Químicos del Agua/análisis
13.
Artículo en Inglés | MEDLINE | ID: mdl-32122890

RESUMEN

In this study, the plasmid content of clinical and commensal strains was analyzed and compared. The replicon profile was similar in both populations, except for L, M, A/C, and N (detected only in clinical strains) and HI1 (only in commensal strains). Although I1 and F were the most frequent replicons, only IncI1, sequence type 12 (ST12) was associated with blaCMY-2 in both populations. In contrast, the widespread resistant IncF plasmids were not linked to a single epidemic plasmid.


Asunto(s)
Proteínas Bacterianas/genética , Farmacorresistencia Bacteriana/genética , Escherichia coli/genética , Klebsiella pneumoniae/genética , Plásmidos/genética , beta-Lactamasas/genética , Escherichia coli/aislamiento & purificación , Heces/microbiología , Humanos , Klebsiella pneumoniae/aislamiento & purificación , Tipificación de Secuencias Multilocus
14.
Opt Express ; 28(7): 9393-9404, 2020 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-32225547

RESUMEN

Typically, materials with large optical losses such as metals are used as microheaters for silicon based thermo-optic phase shifters. Consequently, the heater must be placed far from the waveguide, which could come at the expense of the phase shifter performance. Reducing the gap between the waveguide and the heater allows reducing the power consumption or increasing the switching speed. In this work, we propose an ultra-low loss microheater for thermo-optic tuning by using a CMOS-compatible transparent conducting oxide such as indium tin oxide (ITO) with the aim of drastically reducing the gap. Using finite element method simulations, ITO and Ti based heaters are compared for different cladding configurations and TE and TM polarizations. Furthermore, the proposed ITO based microheaters have also been fabricated using the optimum gap and cladding configuration. Experimental results show power consumption to achieve a π phase shift of 10 mW and switching time of a few microseconds for a 50 µm long ITO heater. The obtained results demonstrate the potential of using ITO as an ultra-low loss microheater for high performance silicon thermo-optic tuning and open an alternative way for enabling the large-scale integration of phase shifters required in emerging integrated photonic applications.

15.
Clin Diabetes ; 38(3): 300-303, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32699481

RESUMEN

Quality Improvement Success Stories are published by the American Diabetes Association in collaboration with the American College of Physicians and the National Diabetes Education Program. This series is intended to highlight best practices and strategies from programs and clinics that have successfully improved the quality of care for people with diabetes or related conditions. Each article in the series is reviewed and follows a standard format developed by the editors of Clinical Diabetes. The following article describes a project designed to improve the degree and quality of support for lifestyle change provided to patients with type 2 diabetes and obesity in the outpatient endocrinology clinic of a rural academic medical center.

16.
17.
Eur Respir J ; 54(3)2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-31346005

RESUMEN

Sensitive tools are needed to accurately establish the diagnosis of tuberculosis (TB) at death, especially in low-income countries. The objective of this study was to evaluate the burden of TB in a series of patients who died in a tertiary referral hospital in sub-Saharan Africa using an in-house real time PCR (TB-PCR) and the Xpert MTB/RIF Ultra (Xpert Ultra) assay.Complete diagnostic autopsies were performed in a series of 223 deaths (56.5% being HIV-positive), including 54 children, 57 maternal deaths and 112 other adults occurring at the Maputo Central Hospital, Mozambique. TB-PCR was performed in all lung, cerebrospinal fluid and central nervous system samples in HIV-positive patients. All samples positive for TB-PCR or showing histological findings suggestive of TB were analysed with the Xpert Ultra assay.TB was identified as the cause of death in 31 patients: three out of 54 (6%) children, five out of 57 (9%)maternal deaths and 23 out of 112 (21%) other adults. The sensitivity of the main clinical diagnosis to detect TB as the cause of death was 19.4% (95% CI 7.5-37.5) and the specificity was 97.4% (94.0-99.1) compared to autopsy findings. Concomitant TB (TB disease in a patient dying of other causes) was found in 31 additional cases. Xpert Ultra helped to identify 15 cases of concomitant TB. In 18 patients, Mycobacterium tuberculosis DNA was identified by TB-PCR and Xpert Ultra in the absence of histological TB lesions. Overall, 62 (27.8%) cases had TB disease at death and 80 (35.9%) had TB findings.The use of highly sensitive, easy to perform molecular tests in complete diagnostic autopsies may contribute to identifying TB cases at death that would have otherwise been missed. Routine use of these tools in certain diagnostic algorithms for hospitalised patients needs to be considered. Clinical diagnosis showed poor sensitivity for the diagnosis of TB at death.


Asunto(s)
Meningitis/mortalidad , Tuberculosis Miliar/mortalidad , Tuberculosis Resistente a Múltiples Medicamentos/mortalidad , Tuberculosis Pulmonar/mortalidad , Adolescente , Adulto , Autopsia , Causas de Muerte , Niño , Preescolar , Femenino , Infecciones por VIH/complicaciones , Infecciones por VIH/mortalidad , Humanos , Lactante , Recién Nacido , Masculino , Mortalidad Materna , Mozambique/epidemiología , Mycobacterium tuberculosis , Estudios Prospectivos , Reacción en Cadena en Tiempo Real de la Polimerasa , Centros de Atención Terciaria
18.
Malar J ; 18(1): 136, 2019 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-30999908

RESUMEN

BACKGROUND: Limited health research capacities (HRC) undermine a country's ability to identify and adequately respond to local health needs. Although numerous interventions to strengthen HRC have been conducted in Africa, there is a need to share the lessons learnt by funding organizations, institutes and researchers. The aim of this report is to identify best practices in HRC strengthening by describing a training programme conducted between 2016 and 2017 at the Saint Joseph's Catholic Hospital (SJCH) in Monrovia (Liberia). METHODS: A call for trainees was launched at the SJCH, the Liberia Medicines and Health Products Regulatory Authority (LMHRA), the Ministry of Health and Social Welfare, the Mother Pattern College of Health Sciences (MPCHS) and community members. Selected trainees participated in four workshops on Good Clinical Laboratory Practice (GCLP), standard operating procedures (SOP) and scientific communication, as well as in a 5-months eLearning mentoring programme. After the training, a collectively-designed research project on malaria was conducted. RESULTS: Twenty-one of the 28 trainees (14 from the SJCH, 3 from LMHRA, one from MPCHS, and 10 community representatives) completed the programme satisfactorily. Pre- and post-training questionnaires completed by 9 of the trainees showed a 14% increase in the percentage of correct answers. Trainees participated in a mixed-methods cross-sectional study of Plasmodium falciparum infection among pregnant women at the SJCH. Selected trainees disseminated activities and research outcomes in three international meetings and three scientific publications. CONCLUSION: This training-through-research programme successfully involved SJCH staff and community members in a practical research exercise on malaria during pregnancy. The challenge is to ensure that the SJCH remains active in research. Harmonization of effectiveness indicators for HRC initiatives would strengthen the case for investing in such efforts.


Asunto(s)
Creación de Capacidad/métodos , Malaria/prevención & control , Enseñanza , Atención a la Salud/organización & administración , Fuerza Laboral en Salud/organización & administración , Humanos , Liberia , Investigación Cualitativa
19.
J Hered ; 110(1): 46-57, 2019 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-30107510

RESUMEN

Host plant shifts in herbivorous insects often involve facing new environments that may speed up the evolution of oviposition behavior, performance-related traits, morphology, and, incidentally, reproductive isolation. In the genus Drosophila, cactophilic species of the repleta group include emblematic species in the study of the evolution of host plant utilization. The South American D. buzzatii and its sibling D. koepferae are a model system for the study of differential host plant use. Although these species exhibit a certain degree of niche overlap, the former breeds primarily on decaying cladodes of Opuntia cacti while D. koepferae main hosts are columnar cacti of the genus Trichocereus. Opuntia sulphurea and Trichocereus terscheckii are among the main hosts in nature. These cacti differ in ecological (spatial and temporal predictability) and chemical characteristics. Particularly relevant is the presence of toxic alkaloids in T. terscheckii. Studies of the effects of these cacti and alkaloids revealed the remarkable impact on oviposition behavior, viability, developmental time, wing morphology, mating success, and developmental stability in both species. Recent whole-genome expression studies showed that expression profiles are massively affected by the rearing cactus, and that the presence of alkaloids is the main factor modulating gene expression in D. buzzatii. Functional enrichment analysis indicated that differentially expressed genes are related to detoxification processes and stress response-though genes involved in development are an important part of the transcriptomic response. The implications of our studies in the evolution of host plant use in the repleta group are discussed.


Asunto(s)
Adaptación Biológica , Cactaceae/fisiología , Drosophila/fisiología , Transcriptoma , Alcaloides/metabolismo , Animales , Evolución Biológica , Cactaceae/genética , Cactaceae/parasitología , Drosophila/genética , Ecosistema , Femenino , Masculino , Modelos Biológicos , Oviposición , Reproducción
20.
Endocr Pract ; 25(5): 423-426, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30720336

RESUMEN

Objectives: To our knowledge, no prior research has explored the prevalence of wearing continuous glucose monitors (CGMs) and/or insulin pumps among in-training fellows and their perception of doing so as part of their education. Our objectives therefore were to estimate the frequency with which wearing a CGM and/or insulin pump is used as a learning opportunity and explore the main motivators and perception on its value. Methods: A multiple-choice survey that addressed each fellow's level of training, type of fellowship training program, and use of CGM and/or insulin pump was sent to all Accreditation Council for Graduate Medical Education endocrinology, diabetes, and metabolism program coordinators or program directors. We asked them to forward this survey to their graduating fellows. Their perception on the value of wearing these devices was addressed. Results: Fifty-one graduating fellows responded to the survey; 78.43% and 62.5% of them wore a CGM and insulin pump, respectively. A total of 89.48% and 90% of those who wore a CGM and insulin pump, respectively, thought it was above-average value for their education, and the most common reasons were to learn the technical aspects and understand what patients with diabetes go through. Conclusion: Wearing a CGM and/or insulin pump is perceived by endocrinology graduating fellows as valuable to their education, specifically, to learn the technical aspects, understand the patient's experience, and develop empathy. Abbreviations: ACGME = Accreditation Council for Graduate Medical Education; CGM = continuous glucose monitor.


Asunto(s)
Diabetes Mellitus , Glucemia , Enfermedades del Sistema Endocrino , Becas , Humanos , Sistemas de Infusión de Insulina
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