RESUMO
Treatment of tularemia during pregnancy is challenging due to toxicity of standard treatment regimens. Here, we report a 31-year-old woman with glandular tularemia who was successfully treated with intravenous azithromycin. Follow-up examinations over a 6-month period showed a sustained response to treatment. She later gave birth to a healthy child.
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Antibacterianos , Azitromicina , Complicações Infecciosas na Gravidez , Tularemia , Humanos , Feminino , Tularemia/tratamento farmacológico , Tularemia/diagnóstico , Azitromicina/uso terapêutico , Gravidez , Adulto , Antibacterianos/uso terapêutico , Complicações Infecciosas na Gravidez/tratamento farmacológico , Complicações Infecciosas na Gravidez/microbiologia , Áustria , Resultado do Tratamento , Francisella tularensis/efeitos dos fármacos , Francisella tularensis/isolamento & purificaçãoRESUMO
OBJECTIVES: A third COVID-19 vaccination is recommended for immunosuppressed patients. However, data on immunogenicity and safety of a third COVID-19 vaccination in patients with immune-mediated inflammatory diseases (IMIDs) are sparse and therefore addressed within this clinical trial. METHODS: 60 immunosuppressed patients and 48 healthy controls (HCs) received a third vaccination with an mRNA vaccine. The primary endpoint was defined as the presence of antibody levels against the receptor-binding domain (RBD)>1500 BAU/mL in patients with IMIDs versus HCs. Further endpoints included differences in neutralising antibodies and cellular immune responses after the third vaccination. Reactogenicity was recorded for 7 days, and safety was evaluated until week 4. RESULTS: Rate of individuals with anti-RBD antibodies>1500 BAU/mL was not significantly different after the third vaccination between patients with IMIDs and HCs (91% vs 100% p=0.101). Anti-RBD and neutralising antibody levels were significantly lower in patients with IMIDs after the third vaccination than in HCs (p=0.002 and p=0.016, respectively). In contrast, fold increase in antibody levels between week 0 and 4 was higher in patients with IMIDs. Treatment with biological (b) disease-modifying anti-rheumatic drugs (DMARD) or combination of bDMARDs and conventional synthetic DMARDs was associated with reduced antibody levels. Enhanced cellular immune response to wild type and Omicron peptide stimulation was observed after the third vaccination. No serious adverse event was attributed to the third vaccination. CONCLUSION: Our clinical trial data support the immunogenicity and safety of a third COVID-19 vaccination in patients with IMIDs. However, effects of DMARD therapy on immunogenicity should be considered. TRIAL REGISTRATION NUMBER: EudraCT No: 2021-002693-10.
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Vacinas contra COVID-19 , Humanos , Anticorpos Antivirais , Antirreumáticos , COVID-19 , Vacinas contra COVID-19/efeitos adversos , Imunogenicidade da Vacina , Agentes de Imunomodulação , VacinaçãoRESUMO
OBJECTIVE: The study was undertaken to assess the impact of B cell depletion on humoral and cellular immune responses to severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) vaccination in patients with various neuroimmunologic disorders on anti-CD20 therapy. This included an analysis of the T cell vaccine response to the SARS-CoV-2 Delta variant. METHODS: We investigated prospectively humoral and cellular responses to SARS-CoV-2 mRNA vaccination in 82 patients with neuroimmunologic disorders on anti-CD20 therapy and 82 age- and sex-matched healthy controls. For quantification of antibodies, the Elecsys anti-SARS-CoV-2 viral spike (S) immunoassay against the receptor-binding domain (RBD) was used. IFN-gamma enzyme-linked immunosorbent spot assays were performed to assess T cell responses against the SARS-CoV-2 Wuhan strain and the Delta variant. RESULTS: SARS-CoV-2-specific antibodies were found less frequently in patients (70% [57/82]) compared with controls (82/82 [100%], p < 0.001). In patients without detectable B cells (<1 B cell/mcl), seroconversion rates and antibody levels were lower compared to nondepleted (≥1 B cell/mcl) patients (p < 0.001). B cell levels ≥1 cell/mcl were sufficient to induce seroconversion in our cohort of anti-CD20 treated patients. In contrast to the antibody response, the T-cell response against the Wuhan strain and the Delta variant was more pronounced in frequency (p < 0.05) and magnitude (p < 0.01) in B-cell depleted compared to nondepleted patients. INTERPRETATION: Antibody responses to SARS-CoV-2 mRNA vaccinnation can be attained in patients on anti-CD20 therapy by the onset of B cell repopulation. In the absence of B cells, a strong T cell response is generated which may help to protect against severe coronavirus disease 2019 (COVID-19) in this high-risk population. ANN NEUROL 2022;91:342-352.
Assuntos
Doenças Autoimunes do Sistema Nervoso/imunologia , Linfócitos B/imunologia , Vacinas contra COVID-19/administração & dosagem , Imunidade Celular/imunologia , Imunidade Humoral/imunologia , SARS-CoV-2/imunologia , Adulto , Doenças Autoimunes do Sistema Nervoso/sangue , Doenças Autoimunes do Sistema Nervoso/epidemiologia , Linfócitos B/metabolismo , COVID-19/epidemiologia , COVID-19/prevenção & controle , Estudos de Coortes , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neuroimunomodulação/imunologia , Estudos Prospectivos , SARS-CoV-2/metabolismoRESUMO
PURPOSE: This study aimed to compare treatment outcomes for bloodstream infections (BSI) caused by a piperacillin/tazobactam (PIP/TAZ)-susceptible E. coli among three patient groups: BSI caused by ampicillin/sulbactam (AMP/SLB)-resistant isolates treated with PIP/TAZ, BSI caused by AMP/SLB-sensitive isolates treated with PIP/TAZ, and BSI caused by AMP/SLB-resistant isolates treated with another monotherapy. METHODS: This retrospective study was conducted in two academic centres in Europe. Adult patients with E. coli BSI were screened from 2014 to 2020. Inclusion criteria were non-ESBL BSI and initial monotherapy for ≥ 72 h. To reduce the expected bias between the patient groups, propensity score matching was performed. The primary outcome was early treatment response after 72 h and required absence of SOFA score increase in ICU/IMC patients, as well as resolution of fever, leukocytosis, and bacteraemia. RESULTS: Of the 1707 patients screened, 315 (18.5%) were included in the final analysis. Urinary tract infection was the most common source of BSI (54.9%). Monotherapies other than PIP/TAZ were cephalosporins (48.6%), carbapenems (34.3%), and quinolones (17.1%). Enhanced early treatment response rate was detected (p = 0.04) in patients with BSI caused by AMP/SLB-resistant isolates treated with another monotherapy (74.3%) compared to those treated with PIP/TAZ (57.1%), and was mainly driven by the use of cephalosporins and quinolones (p ≤ 0.03). Clinical success, 28-day mortality, and rate of relapsing BSI did not significantly differ between the groups. CONCLUSIONS: Our study suggests that initial use of PIP/TAZ may be associated with reduced early treatment response in E. coli BSI caused by AMP/SLB-resistant isolates compared to alternative monotherapies.
Assuntos
Bacteriemia , Infecções por Escherichia coli , Quinolonas , Adulto , Humanos , Sulbactam/uso terapêutico , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Piperacilina/farmacologia , Piperacilina/uso terapêutico , Estudos de Coortes , Escherichia coli , Estudos Retrospectivos , Ácido Penicilânico/farmacologia , Ácido Penicilânico/uso terapêutico , Combinação Piperacilina e Tazobactam/uso terapêutico , Ampicilina/farmacologia , Ampicilina/uso terapêutico , Infecções por Escherichia coli/tratamento farmacológico , Cefalosporinas , Bacteriemia/tratamento farmacológicoRESUMO
Patients suffering from autoimmune hepatitis, a chronic immune-mediated liver disease with an incidence of 0.9 to 2 per 100,000 population per year in Europe, are considered to have a particularly increased risk for coronavirus disease 2019 (Covid-19)-associated hospitalization and death.1,2 Severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) vaccination provides an essential tool to reduce morbidity and mortality in this cohort. However, a large multicenter study in China has shown a lower immunogenic response to inactivated whole-virion SARS-CoV-2 vaccines of chronic liver disease patients in comparison with the healthy population.3 Furthermore, reports from inflammatory bowel diseases or rheumatic disorders showed a reduced serologic response in patients taking glucocorticoids or thiopurine.4,5 The decrease in vaccine-induced antibodies over time, as well as the emergence of variants of concern, led to the recommendation of an additional vaccination in immunocompromised patients.
Assuntos
COVID-19 , Hepatite Autoimune , Vacinas Virais , Anticorpos Antivirais , Vacinas contra COVID-19 , Humanos , SARS-CoV-2 , VacinaçãoRESUMO
OBJECTIVES: To assess the kinetics of humoral response after the first and second dose of messenger RNA (mRNA) vaccines in patients with inflammatory joint diseases compared with healthy controls (HC). To analyse factors influencing the quantity of the immune response. METHODS: We enrolled patients with rheumatoid arthritis (RA) and seronegative spondyloarthritis (SpA), excluding those receiving B-cell depleting therapies and assessed the humoral response to mRNA vaccines after the first and the second dose of the vaccine in terms of seroconversion rate and titre. We compared the results to a HC group and analysed the influence of therapies as well as other characteristics on the humoral response. RESULTS: Samples from 53 patients with RA, 46 patients with SpA and 169 healthy participants were analysed. Seroconversion rates after the first immunisation were only 54% in patients with inflammatory arthritis compared with 98% in the HC group. However, seroconversion rates were 100% in all groups after second immunisation. Patients developed reduced antibody titres after the first vaccination compared with HC, but there was no difference after the second dose. While disease modifying anti-rheumatic drug (DMARD) monotherapy did not affect antibody levels, seroconversion rates as well as titre levels were reduced in patients receiving a combination of DMARDs compared with HC. CONCLUSIONS: Patients with inflammatory joint diseases under DMARD therapy show impaired humoral responses to the first vaccine dose but excellent final responses to vaccination with mRNA vaccines. Therefore, the full course of two immunisations is necessary for efficient vaccination responses in patients with inflammatory arthritis under DMARD therapy.
Assuntos
Artrite Reumatoide/imunologia , Vacinas contra COVID-19/imunologia , COVID-19/prevenção & controle , SARS-CoV-2/imunologia , Espondilartrite/imunologia , Antirreumáticos/imunologia , Artrite Reumatoide/tratamento farmacológico , COVID-19/imunologia , Estudos de Casos e Controles , Feminino , Humanos , Imunidade Humoral/efeitos dos fármacos , Imunogenicidade da Vacina/efeitos dos fármacos , Masculino , Pessoa de Meia-Idade , Soroconversão/efeitos dos fármacos , Espondilartrite/tratamento farmacológicoRESUMO
OBJECTIVE: To assess the humoral response to messenger RNA (mRNA) vaccine of patients with systemic autoimmune rheumatic disease (SARD) and the effect of immunosuppressive medication in a matched cohort study. METHODS: Patients with SARD were enrolled and matched 1:1 for sex and age with healthy control (HC) subjects. Differences in humoral response to two doses of an mRNA vaccine in terms of seroconversion rate (SCR) and SARS-CoV-2 antibody level between the two groups and the impact of treatment within patients with SARD were assessed. RESULTS: We enrolled 82 patients with SARD and 82 matched HC. SCR after the first dose was lower among the patient group than that of HC (65% compared with 100% in HC, p<0.0001) but levelled up after the second dose (94% vs 100%). After the second dose, SCR was lower for patients on combination disease-modifying antirheumatic drug (DMARD) therapy compared with all other groups (81% compared with 95% for monotherapy, p=0.01; 100% for both no DMARD therapy and HC, both p<0.0001). In addition, antibody levels after both doses were lower in patients compared with HC. We found that vaccination response was determined primarily by the number of DMARDs and/or glucocorticoids received, with patients receiving combination therapy (dual and triple therapy) showing the poorest response. CONCLUSIONS: Patients with SARD showed a good response after the second vaccination with an mRNA vaccine. However, the choice of immunosuppressive medication has a marked effect on both SCR and overall antibody level, and the number of different immunomodulatory therapies determines vaccination response.
Assuntos
Antirreumáticos , COVID-19 , Doenças Reumáticas , Antirreumáticos/uso terapêutico , COVID-19/prevenção & controle , Vacinas contra COVID-19 , Estudos de Coortes , Humanos , Imunossupressores/uso terapêutico , Estudos Prospectivos , Doenças Reumáticas/tratamento farmacológico , SARS-CoV-2 , Vacinação , Vacinas Sintéticas , Vacinas de mRNARESUMO
OBJECTIVES: SARS-CoV-2-induced COVID-19 has led to exponentially rising mortality, particularly in immunosuppressed patients, who inadequately respond to conventional COVID-19 vaccination. METHODS: In this blinded randomised clinical trial, we compare the efficacy and safety of an additional booster vaccination with a vector versus mRNA vaccine in non-seroconverted patients. We assigned 60 patients under rituximab treatment, who did not seroconvert after their primary mRNA vaccination with either BNT162b2 (Pfizer-BioNTech) or mRNA-1273 (Moderna), to receive a third dose, either using the same mRNA or the vector vaccine ChAdOx1 nCoV-19 (Oxford-AstraZeneca). Patients were stratified according to the presence of peripheral B cells. The primary efficacy endpoint was the difference in the SARS-CoV-2 antibody seroconversion rate between vector (heterologous) and mRNA (homologous) vaccinated patients by week 4. Key secondary endpoints included the overall seroconversion and cellular immune response; safety was assessed at week 1 and week 4. RESULTS: Seroconversion rates at week 4 were comparable between vector (6/27 patients, 22%) and mRNA (9/28, 32%) vaccines (p=0.6). Overall, 27% of patients seroconverted; specific T cell responses were observed in 20/20 (100%) vector versus 13/16 (81%) mRNA vaccinated patients. Newly induced humoral and/or cellular responses occurred in 9/11 (82%) patients. 3/37 (8%) of patients without and 12/18 (67%) of the patients with detectable peripheral B cells seroconverted. No serious adverse events, related to immunisation, were observed. CONCLUSIONS: This enhanced humoral and/or cellular immune response supports an additional booster vaccination in non-seroconverted patients irrespective of a heterologous or homologous vaccination regimen.
Assuntos
COVID-19 , SARS-CoV-2 , Anticorpos Antivirais , Vacina BNT162 , COVID-19/prevenção & controle , Vacinas contra COVID-19/efeitos adversos , ChAdOx1 nCoV-19 , Humanos , RNA Mensageiro , Soroconversão , Vacinação , Vacinas Sintéticas , Vacinas de mRNARESUMO
OBJECTIVES: Evidence suggests that B cell-depleting therapy with rituximab (RTX) affects humoral immune response after vaccination. It remains unclear whether RTX-treated patients can develop a humoral and T-cell-mediated immune response against SARS-CoV-2 after immunisation. METHODS: Patients under RTX treatment (n=74) were vaccinated twice with either mRNA-1273 or BNT162b2. Antibodies were quantified using the Elecsys Anti-SARS-CoV-2 S immunoassay against the receptor-binding domain (RBD) of the spike protein and neutralisation tests. SARS-CoV-2-specific T-cell responses were quantified by IFN-γ enzyme-linked immunosorbent spot assays. Prepandemic healthy individuals (n=5), as well as healthy individuals (n=10) vaccinated with BNT162b2, served as controls. RESULTS: All healthy controls developed antibodies against the SARS-CoV-2 RBD of the spike protein, but only 39% of the patients under RTX treatment seroconverted. Antibodies against SARS-CoV-2 RBD significantly correlated with neutralising antibodies (τ=0.74, p<0.001). Patients without detectable CD19+ peripheral B cells (n=36) did not develop specific antibodies, except for one patient. Circulating B cells correlated with the levels of antibodies (τ=0.4, p<0.001). However, even patients with a low number of B cells (<1%) mounted detectable SARS-CoV-2-specific antibody responses. SARS-CoV-2-specific T cells were detected in 58% of the patients, independent of a humoral immune response. CONCLUSIONS: The data suggest that vaccination can induce SARS-CoV-2-specific antibodies in RTX-treated patients, once peripheral B cells at least partially repopulate. Moreover, SARS-CoV-2-specific T cells that evolved in more than half of the vaccinated patients may exert protective effects independent of humoral immune responses.
Assuntos
Antirreumáticos/uso terapêutico , Vacinas contra COVID-19/imunologia , COVID-19/prevenção & controle , Hospedeiro Imunocomprometido/imunologia , Imunogenicidade da Vacina/imunologia , Rituximab/uso terapêutico , Adulto , Idoso , Anticorpos Neutralizantes/sangue , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/sangue , Anticorpos Antivirais/imunologia , Doenças Autoimunes/tratamento farmacológico , Doenças Autoimunes/imunologia , Linfócitos B/imunologia , Feminino , Humanos , Imunidade Celular/imunologia , Imunidade Humoral/imunologia , Imunogenicidade da Vacina/efeitos dos fármacos , Masculino , Pessoa de Meia-Idade , SARS-CoV-2 , Linfócitos T/imunologiaRESUMO
OBJECTIVES: Medication-related osteonecrosis of the jaw (MRONJ) is a severe and difficult-to-treat adverse event of bone-modifying agents. Therefore predictive strategies determining patients at risk for a prolonged healing duration are needed to optimize treatment. Thus, the present study evaluates whether or not bone turnover markers can be used to predict the healing duration in MRONJ patients. MATERIALS AND METHODS: The present study is a retrospective data analysis of patients suffering from MRONJ and positive histology for Actinomyces spp., who were identified at the General Hospital Vienna from 2014 to 2018. During the first visit, the patients' demographics and levels of bone formation parameters were compiled. Healing times were analysed by Cox regression in dependence on these factors. RESULTS: A total of 52 patients were identified who fulfilled the inclusion criteria. The indication for bone-modifying agents was breast cancer (n = 21), prostate cancer (n = 14), multiple myeloma (n = 6) and other malignant diseases (n = 11). In 43 (82.7%) of our patients, we were able to document complete mucosal healing. Furthermore, patients who responded faster to therapy showed higher levels of C-telopeptide (P < 0.05), osteocalcin (P < 0.05) and bone-specific alkaline phosphatase (P < 0.05), but lower levels of 1.25-dihydroxyvitamin D (P < 0.05) than slower responding patients. No correlation was found regarding parathyroid hormone or calcitonin levels. Interestingly, patients who had a slower response were less likely to report dental procedures, but more likely to report a history of chemotherapy. CONCLUSION: CTX and osteocalcin levels may be used for predicting healing duration for MRONJ.
Assuntos
Osteonecrose da Arcada Osseodentária Associada a Difosfonatos , Mieloma Múltiplo , Remodelação Óssea , Difosfonatos , Humanos , Masculino , Estudos RetrospectivosRESUMO
We report a human case of Borrelia miyamotoi infection diagnosed in Austria. Spirochetes were detected in Giemsa-stained blood smears. The presence of B. miyamotoi in the patient's blood was confirmed by PCR, and phylogenetic analysis identified an infection with a strain from Europe.
Assuntos
Borrelia , Ixodes , Animais , Áustria , Borrelia/genética , Europa (Continente) , Humanos , FilogeniaRESUMO
The original version of this article unfortunately contained a mistake. The presentation of Fig. 1 was incorrect. The corrected figure is given below.
RESUMO
PURPOSE: Dalbavancin is a novel lipoglycopeptide with potent activity against several gram-positive pathogens, an excellent safety profile and a long elimination half-life. METHODS: In this case series observed at the University Hospital of Vienna between 2015 and 2017, all adult patients with gram-positive infections who received at least one dosage of dalbavancin were screened (n = 118). A total of 72 patients were included in the final analysis. The number of included patients stratified by the source of infection was: skin and soft tissue infection (SSTI) (n = 26), osteomyelitis (n = 20), spondylodiscitis (n = 14), acute septic arthritis (n = 4) and prosthetic joint infection (n = 8). RESULTS: In 46 patients (64%), clinical cure was detected at the end of dalbavancin therapy without additional antibiotic therapy. Of the 26 patients who received additional antibiotic therapy other than dalbavancin, 15 patients (21%) showed no clinical improvement under dalbavancin therapy, four patients (5%) had side effects (nausea n = 1, exanthema n = 2, hyperglycemia n = 1), and in seven patients (10%) clinical improvement under dalbavancin therapy was detected but antibiotic therapy was de-escalated to an oral drug. CONCLUSION: We demonstrated high clinical effectiveness of dalbavancin for acute gram-positive infections primarily acute SSTI, acute septic arthritis, acute osteomyelitis and spondylodiscitis. In patients with biofilm-associated infection (chronic infection or joint prosthesis), source control was absolutely necessary for treatment success.
Assuntos
Antibacterianos/uso terapêutico , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Dermatopatias Infecciosas/tratamento farmacológico , Infecções dos Tecidos Moles/tratamento farmacológico , Teicoplanina/análogos & derivados , Adulto , Idoso , Idoso de 80 Anos ou mais , Áustria , Feminino , Infecções por Bactérias Gram-Positivas/microbiologia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Dermatopatias Infecciosas/microbiologia , Infecções dos Tecidos Moles/microbiologia , Teicoplanina/uso terapêutico , Adulto JovemRESUMO
BACKGROUND: One of the most commonly identified pathogens responsible for orthopaedic implant infection is Staphylococcus epidermidis, which can form biofilms on surfaces. Currently, orthopaedic implants made of various surface materials are available, each with features influencing osseointegration, biocompatibility, and adherence of bacteria to the surface, which is the first step in biofilm formation. The aim of this experimental study was to investigate the effect of a high tribologic-resistant 2.5-µm zirconium nitride top coat on an antiallergic multilayer ceramic-covered cobalt-chromium-molybdenum surface on the formation of S. epidermidis biofilm compared with other commonly used smooth and rough orthopaedic implant surface materials. QUESTIONS/PURPOSES: (1) When evaluating the surfaces of a cobalt-chromium-molybdenum (CoCrMo) alloy with a zirconium (Zr) nitride coating, a CoCrMo alloy without a coating, titanium alloy, a titanium alloy with a corundum-blasted rough surface, and stainless steel with a corundum-blasted rough surface, does a Zr coating reduce the number of colony-forming units of S. epidermidis in an in vitro setting? (2) Is there quantitatively less biofilm surface area on Zr-coated surfaces than on the other surfaces tested in this in vitro model? METHODS: To determine bacterial adhesion, five different experimental implant surface discs were incubated separately with one of 31 different S. epidermidis strains each and subsequently sonicated. Twenty test strains were obtained from orthopaedic patients undergoing emergency hip prosthesis surgeries or revision of implant infection and 10 further strains were obtained from the skin of healthy individuals. Additionally, one reference strain, S. epidermidis DSM 3269, was tested. After serial dilutions, the number of bacteria was counted and expressed as colony-forming units (CFUs)/mL. For biofilm detection, discs were stained with 0.1% Safranin-O for 15 minutes, photographed, and analyzed with computer imaging software. RESULTS: The lowest bacterial count was found in the CoCrMo + Zr surface disc (6.6 x 10 CFU/mL ± 4.6 x 10 SD) followed by the CoCrMo surface (1.1 x 10 CFU/mL ± 1.9 x 10 SD), the titanium surface (1.36 x 10 CFU/mL ± 1.8 x 10 SD), the rough stainless steel surface (2.65 x 10 CFU/mL ± 3.8 x 10 SD), and the rough titanium surface (2.1 x 10 CFU/mL ± 3.0 x 10 SD). The mean CFU count was lower for CoCrMo + Zr discs compared with the rough stainless steel surface (mean difference: 2.0 x 10, p = 0.021), the rough titanium alloy surface (mean difference: 1.4 x 10, p = 0.002), and the smooth titanium surface (mean difference: 7.0 x 10, p = 0.016). The results of biofilm formation quantification show that the mean covered area of the surface of the CoCrMo + Zr discs was 19% (± 16 SD), which was lower than CoCrMo surfaces (35% ± 23 SD), titanium alloy surface (46% ± 20 SD), rough titanium alloy surface (66% ± 23 SD), and rough stainless steel surface (58% ± 18 SD). CONCLUSIONS: These results demonstrate that a multilayer, ceramic-covered, CoCrMo surface with a 2.5-µm zirconium nitride top coat showed less S. epidermidis biofilm formation compared with other surface materials used for orthopaedic implants. CLINICAL RELEVANCE: CoCrMo with a 2.5-µm zirconium nitride top coat seems to be a promising surface modification technology able to reduce bacterial attachment on the surface of an implant and, hence, may further prevent implant infection with S. epidermidis biofilm formation.
Assuntos
Antibacterianos/farmacologia , Biofilmes/efeitos dos fármacos , Materiais Revestidos Biocompatíveis/efeitos adversos , Prótese Articular/efeitos adversos , Infecções Relacionadas à Prótese/prevenção & controle , Infecções Estafilocócicas/prevenção & controle , Staphylococcus epidermidis/efeitos dos fármacos , Zircônio/farmacologia , Aderência Bacteriana/efeitos dos fármacos , Biofilmes/crescimento & desenvolvimento , Prótese Articular/microbiologia , Teste de Materiais , Desenho de Prótese , Infecções Relacionadas à Prótese/microbiologia , Infecções Estafilocócicas/microbiologia , Staphylococcus epidermidis/crescimento & desenvolvimento , Propriedades de SuperfícieRESUMO
The clinical outcomes and safety of dalbavancin as primary and sequential treatment of gram-positive bacteremia with infective endocarditis were evaluated retrospectively. The clinical success rate was high (92.6%), but in 24 of 27 patients dalbavancin was used only after clearance of bacteria from the bloodstream.
Assuntos
Antibacterianos/uso terapêutico , Endocardite Bacteriana/tratamento farmacológico , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Teicoplanina/análogos & derivados , Adulto , Idoso , Idoso de 80 Anos ou mais , Áustria , Bacteriemia/tratamento farmacológico , Feminino , Infecções por Bactérias Gram-Positivas/sangue , Hospitais Gerais , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Teicoplanina/uso terapêutico , Resultado do TratamentoRESUMO
Peritoneal dialysis fluids (PDFs) impair microorganisms' growth, which may compromise effectivity of some antimicrobials. The purpose of this study was to investigate the effect of three different PDFs (lactate/bicarbonate-buffered Physioneal 40® with 2.2% glucose, lactate-buffered Nutrineal PD4® with 1.1% amino acid, and lactate-buffered Extraneal® with 7.5% icodextrin) on biofilm formation of four different Candida spp and antibiofilm effectiveness of anidulafungin, caspofungin and micafungin against Candida spp. biofilm in PDFs. All tested PDFs attained inhibitory effect on the biofilm formation but also reduced biofilm effectiveness of echinocandins against biofilm in PDFs was detected.
Assuntos
Antifúngicos/metabolismo , Biofilmes/efeitos dos fármacos , Candida/efeitos dos fármacos , Candida/fisiologia , Soluções para Diálise/metabolismo , Interações Medicamentosas , Equinocandinas/metabolismo , Soluções para Diálise/química , Humanos , Diálise PeritonealRESUMO
BACKGROUND: Allogeneic hematopoietic stem cell transplant (HSCT) recipients experience an increased risk for invasive fungal diseases (IFDs). METHODS: This retrospective cohort study at the Medical University of Vienna aspired to assess the incidence, characteristics and the outcome of IFDs as well as the associated risk factors in a setting where only 43 % of patients were given systemic antifungal prophylaxis during aplasia. IFDs were classified as probable or proven according to the EORTC/MSG consensus group. All adult patients (n = 242) receiving an allogeneic HSCT at the University Hospital of Vienna from January 2009 to December 2013 were enrolled. RESULTS: The primary outcome of this study was the one-year incidence for IFDs after HSCT, which was 10.3 % (25/242). Overall 28 patients experienced an IFD - 20 probable and 8 proven - with invasive aspergillosis being the predominant IFD (n = 18), followed by invasive candidiasis (n = 7) and pneumocystis pneumonia (n = 3). Patients with an IFD were more likely to be admitted to an intensive care unit (64 % versus 12 %, p < 0.0001) and had a significantly higher mortality in the first year after HSCT (48 % versus 25 %, p = 0.02). Multivariate regression analysis revealed that intensified immunosuppressive therapy (high-dose cortisone and basiliximab or etanercept) because of severe graft-versus-host disease (adjusted odds ratio (AOR) 3.6, p = 0.01) and transplant-associated microangiopathy (AOR 3.7, p = 0.04) were associated with an increased risk for IFD, while antifungal prophylaxis given during aplasia and post-engraftment was associated with a decreased risk (AOR 0.3, p = 0.02). CONCLUSIONS: We documented a one-year incidence for IFDs of 10.3 % and no selection of rare pathogens at a centre with moderate use of antifungal prophylaxis. Intensified immunosuppressive therapy and transplant-associated microangiopathy were significant risk factors for IFDs.
Assuntos
Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Micoses/epidemiologia , Transplante Homólogo/efeitos adversos , Adulto , Idoso , Antifúngicos/uso terapêutico , Aspergilose/epidemiologia , Aspergilose/etiologia , Áustria/epidemiologia , Candidíase Invasiva/epidemiologia , Candidíase Invasiva/etiologia , Estudos de Coortes , Feminino , Doença Enxerto-Hospedeiro/prevenção & controle , Humanos , Imunossupressores/uso terapêutico , Incidência , Masculino , Pessoa de Meia-Idade , Micoses/tratamento farmacológico , Micoses/etiologia , Micoses/microbiologia , Pneumonia por Pneumocystis/epidemiologia , Pneumonia por Pneumocystis/etiologia , Estudos Retrospectivos , Fatores de RiscoRESUMO
The peritoneal dialysis (PD)-associated peritonitis caused by fungi is a relatively rare, but very serious disease. PD fluids (PDFs) affect inhibitory efficacy on the microorganisms' growth, which may compromise the affectivity of some antimicrobials. The purpose of this study was to investigate in vitro the fungicidal effectiveness of echinocandins in diverse PDFs. The fungicidal efficacy of caspofungin (CAS), anidulafungin (ANA), micafungin (MYC) against five clinical isolates of Candida albicans was studied in the different PDFs using time-kill curves. As control substance amphotericin B was used. Echinocandins showed slower and reduced killing of C. albicans in PDFs when compared with the time-kill curves in control bouillon. At concentration of 8 × minimal inhibitory concentration (MIC) the greatest reduction in the growth of C. albicans was seen by ANA in lactate-buffered Nutrineal PD4(®) with 1.1% amino acid (2.33 ± 0.52 log10 CFU ml(-1) ), and by CAS and MYC in lactate-buffered Dianeal PD4(®) with 1.36% glucose (2.36 ± 0.89 log10 CFU ml(-1) and 2.36 ± 0.99 log10 CFU ml(-1) respectively). Using high concentration of 128 × MIC echinocandins achieved fungicidal effect in all PDFs. PDFs may significantly impair the activities of echinocandins, but fungicidal activity of drugs can be achieved at high concentration of 128 × MIC.
Assuntos
Antifúngicos/farmacologia , Candida albicans/efeitos dos fármacos , Soluções para Diálise , Equinocandinas/farmacologia , Lipopeptídeos/farmacologia , Testes de Sensibilidade Microbiana/métodos , Anidulafungina , Caspofungina , Humanos , Micafungina , Viabilidade Microbiana/efeitos dos fármacos , Diálise Peritoneal , Fatores de TempoRESUMO
Invasive systemic fungal infections are a major cause of morbidity and mortality in patients after hematopoietic stem cell transplantation. We report the case of a fatal infection with Hormographiella aspergillata in a patient undergoing allogenic peripheral blood stem cell transplantation for acute myeloid leukaemia.