Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 190
Filtrar
1.
Open Forum Infect Dis ; 7(1): ofz534, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31915715

RESUMO

BACKGROUND: A Diagnostic Laboratory Hub (DLH) was set up in Guatemala to provide opportunistic infection (OI) diagnosis for people with HIV (PWH). METHODS: Patients newly presenting for HIV, PWH not receiving antiretrovirals (ARVs) for >90 days but returned to care (Return/Restart), and PWH on ARVs with symptoms of OIs (ARV treatment) were prospectively included. Screening for tuberculosis, nontuberculous mycobacteria (NTM), histoplasmosis, and cryptococcosis was done. Samples were couriered to the DLH, and results were transmitted electronically. Demographic, diagnostic results, disease burden, treatment, and follow-up to 180 days were analyzed. RESULTS: In 2017, 1953 patients were included, 923 new HIV infections (an estimated 44% of all new HIV infections in Guatemala), 701 on ARV treatment, and 315 Return/Restart. Three hundred seventeen (16.2%) had an OI: 35.9% tuberculosis, 31.2% histoplasmosis, 18.6% cryptococcosis, 4.4% NTM, and 9.8% coinfections. Histoplasmosis was the most frequent AIDS-defining illness; 51.2% of new patients had <200 CD4 cells/mm3 with a 29.4% OI incidence; 14.3% of OIs in new HIV infections occurred with CD4 counts of 200-350 cells/mm3. OIs were the main risk factor for premature death for new HIV infections. At 180 days, patients with OIs and advanced HIV had 73-fold greater risk of death than those without advanced disease who were OI-free. CONCLUSIONS: The DLH OI screening approach provides adequate diagnostic services and obtains relevant data. We propose a CD4 screening threshold of <350 cells/mm3. Mortality remains high, and improved interventions are required, including expansion of the DLH and access to antifungal drugs, especially liposomal amphotericin B and flucytosine.

2.
J Investig Allergol Clin Immunol ; 30(5): 334-339, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31283522

RESUMO

BACKGROUND AND OBJECTIVES: The association between pollen counts and allergen levels in the air is controversial. Objectives: The aims of the study were to quantify total and major allergen levels of Phleum pratense and Olea europaea and to analyze their correlation with grass and olive pollen counts and the number of asthma attacks attended at Complejo Hospitalario Universitario, Cáceres, Spain. MATERIAL AND METHODS: A volumetric air sampler and a Burkard spore trap were used for pollen and aeroallergen collection during April- June 2011. Filters were extracted, and major allergens were quantified using enzyme-linked immunosorbent assay. RESULTS: May was the main grass pollination period, with a maximum peak of 1362 grains/m3 (May 13). The main pollination period for olive was April 30-May 20, with a maximum peak of 851 grains/m3 (May 11). A moderate correlation was observed between asthma exacerbations and grass pollen counts or Phleum total allergen levels; this became stronger when a 3-day offset was introduced. A significant association was observed between asthma exacerbations and total olive allergen or olive pollen grain levels when a 1-day offset was introduced. The maximum correlation (moderate-high) was observed 4 days and 6 days away from the maximum olive pollen peak and the maximum Ole e 1 peak level, respectively. CONCLUSIONS: This study reveals a significant correlation between grass and olive pollination and an increase in the number of visits to the emergency room for asthma attacks. The aerobiological pattern of allergen levels in the air is similar to that of pollen counts during the grass and olive pollination periods.


Assuntos
Alérgenos/imunologia , Asma/diagnóstico , Asma/imunologia , Olea/imunologia , Poaceae/imunologia , Pólen/imunologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Asma/epidemiologia , Biomarcadores , Criança , Pré-Escolar , Progressão da Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Espanha/epidemiologia , Avaliação de Sintomas , Adulto Jovem
3.
Rev Esp Sanid Penit ; 20(2): 40-46, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30231150

RESUMO

INTRODUCTION: The specialized literature has revealed the high prevalence of burnout syndrome in the workforce of different prisons worldwide, as well as the influence of various risk factors associated with sociodemographic and occupational factors linked of the emergence of this occupational health problem. The current study measures the level of burnout and job satisfaction among the group of social workers Spanish prisons. METHODS: A cross-sectional analytical study was carried out on 59 social work professionals at the national level during 2017. Using ad hoc questionnaires, the participants offered information regarding sociodemographic, labour, Maslach Burnout Inventory and job satisfaction from Warr, Cook and Wall information. RESULTS: The values obtained were 20.1 (standard deviation [SD]: 11.9) in the emotional exhaustion dimension, 10.6 (SD: 5.0) in depersonalization and 27.7 (SD: 23.2), for personal accomplishment, and a general level of satisfaction of 55.3 (SD: 11.9). We found statistically significant associations and predictive values between the different dimensions of burnout and job satisfaction at sociodemographic (age) and work level (time in the profession) level. CONCLUSIONS: In line with the scientific literature, social workers in prison have a high level of burnout, especially emotional exhaustion, in addition to a moderate level of job satisfaction. The information offered could be useful in the elaboration of prevention strategies aimed at improving the occupational health of this group.


Assuntos
Esgotamento Profissional/epidemiologia , Satisfação no Emprego , Prisões , Serviço Social , Assistentes Sociais/psicologia , Adulto , Idoso , Esgotamento Profissional/diagnóstico , Esgotamento Profissional/psicologia , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Espanha/epidemiologia
4.
Allergy ; 73(4): 875-884, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29319882

RESUMO

BACKGROUND: Polymerized allergoids coupled to nonoxidized mannan (PM-allergoids) may represent novel vaccines targeting dendritic cells (DCs). PM-allergoids are better captured by DCs than native allergens and favor Th1/Treg cell responses upon subcutaneous injection. Herein we have studied in mice the in vivo immunogenicity of PM-allergoids administered sublingually in comparison with native allergens. METHODS: Three immunization protocols (4-8 weeks long) were used in Balb/c mice. Serum antibody levels were tested by ELISA. Cell responses (proliferation, cytokines, and Tregs) were assayed by flow cytometry in spleen and lymph nodes (LNs). Allergen uptake was measured by flow cytometry in myeloid sublingual cells. RESULTS: A quick antibody response and higher IgG2a/IgE ratio were observed with PM-allergoids. Moreover, stronger specific proliferative responses were seen in both submandibular LNs and spleen cells assayed in vitro. This was accompanied by a higher IFNγ/IL-4 ratio with a quick IL-10 production by submandibular LN cells. An increase in CD4+ CD25high FOXP3+ Treg cells was detected in LNs and spleen of mice treated with PM-allergoids. These allergoids were better captured than native allergens by antigen-presenting (CD45+ MHC-II+ ) cells obtained from the sublingual mucosa, including DCs (CD11b+ ) and macrophages (CD64+ ). Importantly, all the differential effects induced by PM-allergoids were abolished when using oxidized instead of nonoxidized PM-allergoids. CONCLUSION: Our results demonstrate for the first time that PM-allergoids administered through the sublingual route promote the generation of Th1 and FOXP3+ Treg cells in a greater extent than native allergens by mechanisms that might well involve their better uptake by oral antigen-presenting cells.


Assuntos
Administração Sublingual , Mananas/administração & dosagem , Extratos Vegetais/administração & dosagem , Linfócitos T Reguladores/imunologia , Células Th1/imunologia , Alergoides , Animais , Células Apresentadoras de Antígenos/imunologia , Feminino , Mananas/imunologia , Camundongos , Camundongos Endogâmicos BALB C , Mucosa Bucal/imunologia , Células Mieloides/imunologia , Extratos Vegetais/imunologia , Imunoterapia Sublingual/métodos
5.
Mem Cognit ; 46(4): 544-557, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29330686

RESUMO

Is there a learning mechanism triggered by mere expectation violation? Is there some form of memory enhancement inherent to an event mismatching our predictions? Across seven experiments, we explore this issue by means of a validity paradigm. Although our manipulation clearly succeeded in generating an expectation and breaking it, the memory consequences of that expectation mismatch are not so obvious. We report here evidence of a null effect of expectation on memory formation. Our results (1) show that enhanced memory for unexpected events is not easily achieved and (2) call for a reevaluation of previous accounts of memory enhancements based on prediction error or difficulty of processing. Limitations of this study and possible implications for the field are discussed in detail.


Assuntos
Antecipação Psicológica/fisiologia , Atenção/fisiologia , Memória/fisiologia , Adulto , Humanos , Adulto Jovem
6.
Rev. esp. sanid. penit ; 20(2): 40-47, 2018. tab
Artigo em Espanhol | IBECS | ID: ibc-179455

RESUMO

Introducción: La literatura especializada ha puesto de manifiesto la elevada prevalencia del síndrome de burnout en el personal laboral de diferentes centros penitenciarios a nivel mundial, además de la influencia de diversos factores de riesgo asociados al nivel sociodemográfico y laboral ante la aparición de este problema de salud laboral. El presente estudio mide el nivel de burnout y de satisfacción laboral en el colectivo de trabajadores sociales en las prisiones de España. Material y métodos: Se realizó un estudio de carácter transversal analítico sobre 59 profesionales del trabajo social a nivel nacional durante el año 2017. Mediante un cuestionario ad hoc, los participantes ofrecieron información a nivel sociodemográfico y laboral, cuestionario de Maslach Burnout Inventory y de satisfacción laboral de Warr, Cook y Wall. Resultados: Los valores obtenidos fueron de 20,1 (desviación típica [DT]: 11,9) en la dimensión de cansancio emocional, 10,6 (DT: 5,0) en despersonalización y 27,7 (DT: 23,2), para realización personal y un nivel de satisfacción general de 55,3 (DT: 11,9). Se encontraron asociaciones estadísticamente significativas y valores predictivos entre las diferentes dimensiones de burnout y de satisfacción laboral a nivel sociodemográfico (edad) y laboral (tiempo en la profesión). Conclusiones: En línea con la literatura científica, los trabajadores sociales en prisión presentan un elevado grado de burnout, especialmente de cansancio emocional, además de un moderado nivel de satisfacción laboral. La información ofrecida podría ser de utilidad a la hora de elaborar estrategias de prevención destinadas a mejorar la salud laboral de este colectivo


Introduction: The specialized literature has revealed the high prevalence of burnout syndrome in the workforce of different prisons worldwide, as well as the influence of various risk factors associated with sociodemographic and occupational factors linked of the emergence of this occupational health problem. The current study measures the level of burnout and job satisfaction among the group of social workers Spanish prisons. Methods: A cross-sectional analytical study was carried out on 59 social work professionals at the national level during 2017. Using ad hoc questionnaires, the participants offered information regarding sociodemographic, labour, Maslach Burnout Inventory and job satisfaction from Warr, Cook and Wall information. Results: The values obtained were 20.1 (standard deviation [SD]: 11.9) in the emotional exhaustion dimension, 10.6 (SD: 5.0) in depersonalization and 27.7 (SD: 23.2), for personal accomplishment, and a general level of satisfaction of 55.3 (SD: 11.9). We found statistically significant associations and predictive values between the different dimensions of burnout and job satisfaction at sociodemographic (age) and work level (time in the profession) level. Conclusions: In line with the scientific literature, social workers in prison have a high level of burnout, especially emotional exhaustion, in addition to a moderate level of job satisfaction. The information offered could be useful in the elaboration of prevention strategies aimed at improving the occupational health of this group


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Satisfação no Emprego , Estresse Psicológico/psicologia , Violência no Trabalho/psicologia , Esgotamento Profissional/epidemiologia , Estudos Transversais , Prisões , Hostilidade , 16360 , Serviço Social/tendências
7.
Rev. clín. esp. (Ed. impr.) ; 217(1): 30-34, ene.-feb. 2017. ilus
Artigo em Espanhol | IBECS | ID: ibc-159530

RESUMO

Al cumplirse 10 años del descubrimiento de las células pluripotenciales inducidas se revisan los principales resultados en sus distintos campos de aplicación, los obstáculos con los que se ha encontrado su experimentación, así como las posibles aplicaciones en la práctica clínica. La eficacia de las células pluripotenciales inducidas en la experimentación clínica puede equipararse a la de las células troncales embrionarias humanas, pero, a diferencia de estas, no presentan la grave dificultad ética que conlleva la necesidad de destruir embriones humanos para su obtención. El hallazgo de estas células, que constituyó en su día un verdadero hito científico merecedor de un Premio Nobel de Medicina, está hoy rodeado de luces y sombras: grandes esperanzas en la medicina regenerativa frente a riesgos aún no bien controlados de reacciones imprevisibles, tanto en los procesos de desdiferenciación como en la posterior diferenciación hacia las estirpes celulares empleadas con fines terapéuticos o de experimentación (AU)


On the 10-year anniversary of the discovery of induced pluripotent stem cells, we review the main results from their various fields of application, the obstacles encountered during experimentation and the potential applications in clinical practice. The efficacy of induced pluripotent cells in clinical experimentation can be equated to that of human embryonic stem cells; however, unlike stem cells, induced pluripotent cells do not involve the severe ethical difficulties entailed by the need to destroy human embryos to obtain them. The finding of these cells, which was in its day a true scientific milestone worthy of a Nobel Prize in Medicine, is currently enveloped by light and shadow: high hopes for regenerative medicine versus the, as of yet, poorly controlled risks of unpredictable reactions, both in the processes of dedifferentiation and subsequent differentiation to the cell strains employed for therapeutic or experimentation goals (AU)


Assuntos
Humanos , Masculino , Feminino , Células-Tronco Pluripotentes Induzidas/fisiologia , Células-Tronco/patologia , Células-Tronco/fisiologia , Medicina Regenerativa/história , Medicina Regenerativa/métodos , Reprogramação Celular/fisiologia , Medicina Regenerativa/organização & administração , Medicina Regenerativa/normas , Medicina Regenerativa/tendências , Reprogramação Celular/genética , Técnicas de Reprogramação Celular/instrumentação , Técnicas de Reprogramação Celular/normas
8.
Rev Clin Esp (Barc) ; 217(1): 30-34, 2017.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-27717488

RESUMO

On the 10-year anniversary of the discovery of induced pluripotent stem cells, we review the main results from their various fields of application, the obstacles encountered during experimentation and the potential applications in clinical practice. The efficacy of induced pluripotent cells in clinical experimentation can be equated to that of human embryonic stem cells; however, unlike stem cells, induced pluripotent cells do not involve the severe ethical difficulties entailed by the need to destroy human embryos to obtain them. The finding of these cells, which was in its day a true scientific milestone worthy of a Nobel Prize in Medicine, is currently enveloped by light and shadow: high hopes for regenerative medicine versus the, as of yet, poorly controlled risks of unpredictable reactions, both in the processes of dedifferentiation and subsequent differentiation to the cell strains employed for therapeutic or experimentation goals.

9.
Food Microbiol ; 49: 173-81, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25846928

RESUMO

There is a timely need to evaluate the effect agricultural factors and meteorological conditions on fresh produce contamination. This study evaluated those risk factors and described, for the first time, the distribution of indicator microorganisms (Escherichia coli, Enterococcus, coliforms, and Enterobacteriaceae) and the prevalence of foodborne pathogens (Enterohaemorrhagic E. coli, Listeria monocytogenes and Salmonella spp.) in baby spinach grown in the Southeast of Spain. A longitudinal study was conducted on three farms (2011-2013). Results obtained for E. coli highlighted soil and irrigation water as important factors affecting the microbial safety of baby spinach. Significant differences in the proportion of E. coli positive samples were found between treated (46.1%) and untreated (100%) irrigation water. However, the microbial quality of irrigation water didn't affect E. coli prevalence in produce. All E. coli positive spinach samples were detected at the highest observed temperature range suggesting that ambient temperature affects the probability and extent of spinach contamination. Salmonella spp. was detected by RT-PCR in manure, soil, irrigation water and baby spinach but only two of them (manure and irrigation water) were confirmed by isolation in culture media. Salmonella RT-PCR positive samples showed higher levels of E. coli than Salmonella negative samples. This preliminary finding supports recent identification of E. coli as a suitable parameter for the hygiene criterion at the primary production of leafy greens.


Assuntos
Bactérias/crescimento & desenvolvimento , Água Doce/microbiologia , Microbiologia do Solo , Spinacia oleracea/crescimento & desenvolvimento , Irrigação Agrícola , Agricultura , Bactérias/genética , Bactérias/isolamento & purificação , Clima , Ecossistema , Inocuidade dos Alimentos , Água Doce/química , Esterco/microbiologia , Espanha , Spinacia oleracea/microbiologia
10.
Clin Microbiol Infect ; 21(2): 183-9, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25658565

RESUMO

Estimates of the incidence and prevalence of serious fungal infections, based on epidemiological data, are essential in order to inform public health priorities given the lack of resources dedicated to the diagnosis and treatment of these serious fungal diseases. However, epidemiology of these infections is largely unknown, except for candidaemia and cryptococcosis. The aim of this work is to calculate the burden of serious fungal infections in Spain. All published epidemiology papers reporting fungal infection rates from Spain were identified. Where no data existed, we used specific populations at risk and fungal infection frequencies in those populations to estimate national incidence or prevalence, depending on the condition. Around 8.1 million people suffer a fungal infection every year. Most of them are skin or mucosal infections causing no deaths. Candidaemia is more common than in other European countries and has risen by 1.88-fold in frequency in the last decade (8.1 cases × 100,000). Good estimates of invasive aspergillosis (2.75 cases × 100,000) and mucormycosis (0.04 × 100,000) are available. Fungal infections with a high mortality such as invasive aspergillosis, candidaemia, Pneumocystis pneumonia and mucormycosis are not numerous in Spain, but they affect those with severe underlying diseases and are therefore linked to poor outcomes. Additional studies are required, especially for high burden diseases such as recurrent thrush in women (∼9000 cases × 100,000 women), allergic bronchopulmonary aspergillosis (126 cases × 100,000) and severe asthma with fungal sensitisation (198 cases × 100,000).


Assuntos
Micoses/epidemiologia , Adolescente , Adulto , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Prevalência , Espanha/epidemiologia , Inquéritos e Questionários , Análise de Sobrevida , Adulto Jovem
11.
J Clin Microbiol ; 52(5): 1737-40, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24574295

RESUMO

A retrospective analysis of real-time PCR (RT-PCR) results for 151 biopsy samples obtained from 132 patients with proven invasive fungal diseases was performed. PCR-based techniques proved to be fast and sensitive and enabled definitive diagnosis in all cases studied, with detection of a total of 28 fungal species.


Assuntos
Fungos/genética , Micoses/diagnóstico , Micoses/microbiologia , Biópsia/métodos , DNA Fúngico/genética , Humanos , Reação em Cadeia da Polimerase/métodos , Estudos Retrospectivos
12.
Persoonia ; 30: 11-47, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24027345

RESUMO

The order Mucorales comprises predominantly fast-growing saprotrophic fungi, some of which are used for the fermentation of foodstuffs but it also includes species known to cause infections in patients with severe immune or metabolic impairments. To inventory biodiversity in Mucorales ITS barcodes of 668 strains in 203 taxa were generated covering more than two thirds of the recognised species. Using the ITS sequences, Molecular Operational Taxonomic Units were defined by a similarity threshold of 99 %. An LSU sequence was generated for each unit as well. Analysis of the LSU sequences revealed that conventional phenotypic classifications of the Mucoraceae are highly artificial. The LSU- and ITS-based trees suggest that characters, such as rhizoids and sporangiola, traditionally used in mucoralean taxonomy are plesiomorphic traits. The ITS region turned out to be an appropriate barcoding marker in Mucorales. It could be sequenced directly in 82 % of the strains and its variability was sufficient to resolve most of the morphospecies. Molecular identification turned out to be problematic only for the species complexes of Mucor circinelloides, M. flavus, M. piriformis and Zygorhynchus moelleri. As many as 12 possibly undescribed species were detected. Intraspecific variability differed widely among mucorealean species ranging from 0 % in Backusella circina to 13.3 % in Cunninghamella echinulata. A high proportion of clinical strains was included for molecular identification. Clinical isolates of Cunninghamella elegans were identified molecularly for the first time. As a result of the phylogenetic analyses several taxonomic and nomenclatural changes became necessary. The genus Backusella was emended to include all species with transitorily recurved sporangiophores. Since this matched molecular data all Mucor species possessing this character were transferred to Backusella. The genus Zygorhynchus was shown to be polyphyletic based on ITS and LSU data. Consequently, Zygorhynchus was abandoned and all species were reclassified in Mucor. Our phylogenetic analyses showed, furthermore, that all non-thermophilic Rhizomucor species belong to Mucor. Accordingly, Rhizomucor endophyticus was transferred to Mucor and Rhizomucor chlamydosporus was synonymised with Mucor indicus. Lecto-, epi- or neotypes were designated for several taxa.

13.
Antimicrob Agents Chemother ; 57(7): 3380-7, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23669377

RESUMO

A population-based survey was conducted to investigate the epidemiology of and antifungal resistance in Spanish clinical strains of filamentous fungi isolated from deep tissue samples, blood cultures, and respiratory samples. The study was conducted in two different periods (October 2010 and May 2011) to analyze seasonal variations. A total of 325 strains were isolated in 29 different hospitals. The average prevalence was 0.016/1,000 inhabitants [corrected]. Strains were identified by sequencing of DNA targets and susceptibility testing by the European Committee for Antimicrobial Susceptibility Testing reference procedure. The most frequently isolated genus was Aspergillus, accounting for 86.3% of the isolates, followed by Scedosporium at 4.7%; the order Mucorales at 2.5%; Penicillium at 2.2%, and Fusarium at 1.2%. The most frequent species was Aspergillus fumigatus (48.5%), followed by A. flavus (8.4%), A. terreus (8.1%), A. tubingensis (6.8%), and A. niger (6.5%). Cryptic/sibling Aspergillus species accounted for 12% of the cases. Resistance to amphotericin B was found in 10.8% of the isolates tested, while extended-spectrum triazole resistance ranged from 10 to 12.7%, depending on the azole tested. Antifungal resistance was more common among emerging species such as those of Scedosporium and Mucorales and also among cryptic species of Aspergillus, with 40% of these isolates showing resistance to all of the antifungal compounds tested. Cryptic Aspergillus species seem to be underestimated, and their correct classification could be clinically relevant. The performance of antifungal susceptibility testing of the strains implicated in deep infections and multicentric studies is recommended to evaluate the incidence of these cryptic species in other geographic areas.


Assuntos
Antifúngicos/farmacologia , Dermatomicoses/tratamento farmacológico , Dermatomicoses/epidemiologia , Farmacorresistência Fúngica , Fungos/efeitos dos fármacos , Anfotericina B/farmacologia , Aspergillus/efeitos dos fármacos , Aspergillus/isolamento & purificação , Sequência de Bases , Dermatomicoses/microbiologia , Fungos/classificação , Fungos/isolamento & purificação , Fusarium/efeitos dos fármacos , Fusarium/isolamento & purificação , Humanos , Testes de Sensibilidade Microbiana , Penicillium/efeitos dos fármacos , Penicillium/isolamento & purificação , Scedosporium/efeitos dos fármacos , Scedosporium/isolamento & purificação , Análise de Sequência de DNA , Espanha , Triazóis/farmacologia
14.
Clin Microbiol Infect ; 19(6): E271-7, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23464751

RESUMO

The performance of a pan-fungal PCR-based technique was evaluated to assess the aetiology of invasive fungal diseases (IFDs). A total of 89 formalin-fixed paraffin-embedded biopsy samples from 84 patients with proven IFD were studied. Culture of tissue was performed in 68 (81%) patients. The sensitivities of the PCR-based technique and microbiological culture of tissues were 89% and 56%, respectively (p <0.01). According to PCR results, Aspergillus species accounted for 67%, Candida species for 13%, zygomycetes for 11%, and rare and emerging fungi for 9%. Aspergillus species were significantly associated with lung samples (79.6%, p <0.01), Mucorales were associated with skin/subcutaneous samples, and Candida species were associated with gastrointestinal samples. Regarding biopsy samples with Aspergillus species, Aspergillus fumigatus DNA was detected in 43 of 50 (86%), and Aspergillus flavus in six of 50 (12%). PCR was positive in 24 of 30 (80%) cases with negative culture. In nine of the 84 patients, the PCR technique failed to amplify the DNA. Six also had negative cultures, and in the remaining three cases culture was positive (Rhizopus microsporus, Rhizopus arrhizus, and Sakseneae vasiformis), suggesting that the PCR technique was not as effective in amplifying the DNA of some species of Zygomycetes. In five cases, there was no correlation between culture results and those obtained with DNA amplification, indicating the possibility of a mixed infection or the presence of colonizer/contaminant microorganisms. In summary, PCR-based techniques for DNA amplification should be implemented in histopathology and microbiology departments, as they appear to be complementary to conventional methods for IFD detection.


Assuntos
DNA Fúngico , Micoses/diagnóstico , Técnicas de Amplificação de Ácido Nucleico , Biópsia , Humanos , Micoses/microbiologia , Técnicas de Amplificação de Ácido Nucleico/métodos , Reação em Cadeia da Polimerase em Tempo Real , Reprodutibilidade dos Testes , Estudos Retrospectivos , Sensibilidade e Especificidade
15.
Clin Microbiol Infect ; 19(1): E1-E7, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22925434

RESUMO

Mucormycetes infections are very difficult to treat and a delay in diagnosis could be fatal for the outcome of the patient. A molecular diagnostic technique based on Real Time PCR was developed for the simultaneous detection of Rhizopus oryzae, Rhizopus microsporus and the genus Mucor spp. in both culture and clinical samples. The methodology used was Molecular beacon species-specific probes with an internal control. This multiplex real-time PCR (MRT-PCR) was tested in 22 cultured strains and 12 clinical samples from patients suffering from a proven mucormycosis. Results showed 100% specificity and a detection limit of 1 fg of DNA per microlitre of sample. The sensitivity was 100% for clinical cultured strains and for clinical samples containing species detected by the PCR assay. Other mucormycetes species were not detected in clinical samples. This technique can be useful for clinical diagnosis and further studies are warranted.


Assuntos
Mucor/isolamento & purificação , Mucormicose/microbiologia , Reação em Cadeia da Polimerase Multiplex/métodos , Reação em Cadeia da Polimerase em Tempo Real/métodos , Humanos , Limite de Detecção , Tipagem Molecular/métodos , Mucor/genética , Rhizopus/genética , Rhizopus/isolamento & purificação
17.
Mycopathologia ; 174(2): 171-6, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22437261

RESUMO

Zygomycosis encompasses infections due to two distinct orders of fungi, Mucorales and Entomophthorales. With rare exception, Entomophthorales are restricted to tropical areas. By contrast, mucorales are ubiquitous opportunistic fungi, which play a crucial part in the natural decay process. In human pathology, they may be opportunistic agents and be responsible for rare infection called (Mucormycosis) zygomycosis. We report two cases of zygomycosis from Madhya Pradesh, Central India, one caused by Rhizopus oryzae in a diabetic patient and another caused by Rhizopus microsporus in an apparently healthy patient. The cases were diagnosed by direct microscopy, histopathological examination and culture. Both the patients were successfully treated with liposomal amphotericin B. Rhizopus microsporus is, for the first time reported from Madhya Pradesh, India, causing rhino-maxillary orbital zygomycosis.


Assuntos
Rhizopus/isolamento & purificação , Zigomicose/diagnóstico , Zigomicose/patologia , Adulto , DNA Fúngico/química , DNA Fúngico/genética , Feminino , Histocitoquímica , Humanos , Índia , Masculino , Microscopia , Pessoa de Meia-Idade , Dados de Sequência Molecular , Rhizopus/classificação , Rhizopus/citologia , Rhizopus/genética , Análise de Sequência de DNA
18.
Clin Microbiol Infect ; 18(12): 1229-35, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22192527

RESUMO

In this paper we report on the development and validation of two different methods for posaconazole quantification from serum samples, HPLC/UV and bioassay. Both methods have been validated according to international guidelines and were also applied to the analysis of 61 trough serum samples from treated patients. A good correlation between both methods was observed. The HPLC method, more laborious and expensive, was demonstrated to be more accurate, precise and faster (analytical range 0.125-16 µg/mL, accuracy between -2.48 and 3.70% and precision between 2.77 and 5.93%, with an analytical run time of 11 min), making it a valuable tool for reference laboratories that centralize high numbers of samples. The microbiological method, however, is simple and offers sufficient precision and accuracy (analytical range 0.125-16 µg/mL, accuracy between -8.10 and 3.77% and a precision between 4.52 and 10.07%), to be used to monitor posaconazole. It may be a valid alternative to chromatographic methods in clinical laboratories without specialized facilities.


Assuntos
Antifúngicos/sangue , Bioensaio/métodos , Cromatografia Líquida de Alta Pressão/métodos , Soro/química , Espectrofotometria Ultravioleta/métodos , Triazóis/sangue , Humanos , Masculino
19.
Clin Microbiol Infect ; 17(12): E27-9, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22011310

RESUMO

The European Committee on Antimicrobial Susceptibility Testing-Subcommittee on Antifungal Susceptibility Testing (EUCAST-AFST) has determined breakpoints for amphotericin B for Candida spp. This Technical Note is based on the EUCAST amphotericin B rationale document (available on the EUCAST website: http://www.eucast.org). Species-specific breakpoints for C. albicans, C. glabrata, C. krusei, C. parapsilosis and C. tropicalis are S: MIC ≤1 mg/L, R: MIC > 1 mg/L. There are insufficient data to set breakpoints for other species. The breakpoints are based upon pharmacokinetic data, epidemiological cut-ff values and clinical experience. Breakpoints will be reviewed regularly.


Assuntos
Anfotericina B/farmacologia , Antifúngicos/farmacologia , Candida/efeitos dos fármacos , Candidíase/microbiologia , Farmacorresistência Fúngica , Anfotericina B/administração & dosagem , Anfotericina B/farmacocinética , Antifúngicos/administração & dosagem , Antifúngicos/farmacocinética , Candida/isolamento & purificação , Candidíase/tratamento farmacológico , Humanos , Testes de Sensibilidade Microbiana/métodos , Testes de Sensibilidade Microbiana/normas
20.
Clin Microbiol Infect ; 17(11): E18-20, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21923778

RESUMO

The European Committee on Antimicrobial Susceptibility Testing-Subcommittee on Antifungal Susceptibility Testing has determined breakpoints for anidulafungin for Candida spp. This Technical Note is based on the EUCAST anidulafungin rationale document (available at: http://www.eucast.org). Species-specific breakpoints for C. albicans are S ≤0.03 mg/L and R >0.03 mg/L and for C. glabrata, C. tropicalis and C. krusei S ≤0.06 mg/L and R >0.06 mg/L. C. parapsilosis was not regarded a good target for anidulafungin. There are insufficient data to set breakpoints for other species. The breakpoints are based upon pharmacokinetic data, epidemiological cut-off values and clinical experience. Breakpoints will be reviewed regularly.


Assuntos
Antifúngicos/farmacologia , Candida/efeitos dos fármacos , Equinocandinas/farmacologia , Anidulafungina , Antifúngicos/farmacocinética , Equinocandinas/farmacocinética , Humanos , Testes de Sensibilidade Microbiana/métodos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...