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1.
Indian J Tuberc ; 70(3): 329-338, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37562909

RESUMO

BACKGROUND: The biosynthesis of gold nanoparticles using medicinal plants as reducing and stabilizing agent for synthesis is an emerging area of research due to their cost effectiveness and further diversified applications in various fields. People with HIV are prone to these opportunistic infections like TB due to the immunocompromised condition. In the present study, the nanoparticles and nanoconjugates were screened for effective anti-mycobacterial efficiency against opportunistic infections. METHODS: Incidentally, the nanoparticles were biosynthesized using single plant extract. The biosynthesized nanoparticles were initially screened for effective anti-tuberculosis activity against Mycobacterium tuberculosis. Based on the effective antimicrobial activity, a nanoconjugate was biosynthesized combining three plant extracts for a cumulative activity. RESULTS: The biosynthesized gold nanoparticles and nanoconjugates showed MIC demonstrating for 99% inhibition and MIC99 was found to be 6.42 µg/ml. Among all the 15 nanoparticles tested, seven NPs showed exceptional anti-TB activities NP1, NP2, NP6, NP7, NP10, NP12 and NP15 and the other nanoparticles exhibited varying degrees of inhibition - anti-TB activities. In the 12 nanoconjugate tested, seven nanoconjugate demonstrated exceptional anti-TB activities such as NCC1, NCC2, NCC5, NCC6, NCV1, NCV6 and NCV4. CONCLUSION: The objective of the study was to identify the nanoparticles and nanoconjugates which demonstrated potential activity against M. tuberculosis so that a single nanoparticle or nanoconjugate can be targeted to treat patients with TB. Minimum Inhibitory Concentration (MIC) of the biosynthesized gold nanoparticles and nanoconjugates were determined against M. tuberculosis H37Rv.


Assuntos
Nanopartículas Metálicas , Mycobacterium tuberculosis , Infecções Oportunistas , Tuberculose , Humanos , Nanoconjugados/uso terapêutico , Ouro/farmacologia , Ouro/uso terapêutico , Antituberculosos/farmacologia , Antituberculosos/uso terapêutico , Tuberculose/tratamento farmacológico , Infecções Oportunistas/tratamento farmacológico , Testes de Sensibilidade Microbiana
2.
Photodiagnosis Photodyn Ther ; 37: 102678, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34890781

RESUMO

Opportunistic infections are widely described in patients with novel coronavirus disease 2019 (COVID-19); however, very few studies have addressed those affecting the oral cavity. Given the lack of information on the clinical presentations and the available treatment options, the present study aimed to show a case in which a combination of antimicrobial photodynamic therapy (aPDT) and photobiomodulation therapy (PBMT) was used for the management of two concomitant COVID-19-associated opportunistic oral infections (oral pseudomembranous candidiasis and recurrent herpes labialis). Within 7 days and without any systemic drug administration, all the lesions resolved completely, and the patient no longer reported oral pain or discomfort. According to the current case report and taking into consideration the significant gaps in the knowledge and understanding of COVID-19, this combination of phototherapy modalities seems to be a promising tool for managing viral and fungal opportunistic oral infections.


Assuntos
COVID-19 , Infecções Oportunistas , Fotoquimioterapia , Humanos , Infecções Oportunistas/tratamento farmacológico , Fotoquimioterapia/métodos , Fármacos Fotossensibilizantes/uso terapêutico , SARS-CoV-2
3.
Sci Rep ; 11(1): 8417, 2021 04 19.
Artigo em Inglês | MEDLINE | ID: mdl-33875698

RESUMO

Antifungal activity of Monotheca buxifolia methanolic extract and its various fractions were assessed against Macrophomina phaseolina, a soil-borne fungal pathogen of more than 500 vegetal species as well as rare and emerging opportunistic human pathogen. Different concentrations of methanolic extract (3.125 to 200 mg mL-1) inhibited fungal biomass by 39-45%. Isolated n-hexane, chloroform and ethyl acetate fractions suppressed fungal biomass by 32-52%, 29-50% and 29-35%, respectively. Triterpenes lupeol and lupeol acetate (1, 2) were isolated from n-hexane while betulin, ß-sitosterol, ß-amyrin, oleanolic acid (3-6) were isolated from chloroform fraction. Vanillic acid, protocatechuic acid, kaempferol and quercetin (7-10) were isolated from the ethyl acetate fraction and identified using various spectroscopic techniques namely mass spectroscopy and NMR. Antifungal activity of different concentrations (0.0312 to 2 mg mL-1) of the isolated compounds was evaluated and compared with the activity of a broad spectrum fungicide mancozeb. Different concentrations of mencozeb reduced fungal biomass by 83-85%. Among the isolated compounds lupeol acetate (2) was found the highest antifungal against M. phaseolina followed by betulin (3), vanillic acid (7), protocatechuic acid (8), ß-amyrin (5) and oleanolic acid (6) resulting in 79-81%, 77-79%, 74-79%, 67-72%, 68-71% and 68-71%, respectively. Rest of the compounds also showed considerable antifungal activity and reduced M. phaseolina biomass by 41-64%.


Assuntos
Ascomicetos/efeitos dos fármacos , Micoses/tratamento farmacológico , Triterpenos Pentacíclicos/farmacologia , Antifúngicos/farmacologia , Humanos , Maneb/farmacologia , Infecções Oportunistas/tratamento farmacológico , Extratos Vegetais/farmacologia , Zineb/farmacologia
4.
Nephrology (Carlton) ; 26(2): 178-184, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33155329

RESUMO

INTRODUCTION: Rifampicin is one of the most effective components of anti-tuberculous therapy (ATT). Since rifampicin is a hepatic enzyme (CYP3A4) inducer, in a post-renal transplant recipient, the dose of calcineurin inhibitors needs to be up-regulated and frequently monitored. In resource-limited (low- and lower-middle-income countries) setting this is not always feasible. Therefore, we evaluated a non-rifampicin-based ATT using levofloxacin in kidney transplant recipients. METHODS: We retrospectively studied the medical records of renal transplant recipients diagnosed with tuberculosis in our institute between 2014 and 2017. After a brief discussion with patients regarding the nature and course of ATT, those who opted for a non-rifampicin based therapy due to financial constraints were included in the study and followed for a minimum of 6 months period after the completion of ATT. RESULTS: Out of the 550 renal transplant recipients, 67 (12.2%) developed tuberculosis after a median period of 24 (1-228) months following transplantation, of them, 64 patients opted for non-rifampicin-based ATT. The mean age was 37.6 years. Only 25% were given anti-thymocyte globulin based induction, while the majority (56; 87.5%) of them were on tacrolimus-based triple-drug maintenance therapy. Extrapulmonary tuberculosis was noted in 33% of cases, while 12 (18.7%) had disseminated disease. The median duration of treatment was 12 months and the cure rate of 93.7% (n = 60) was achieved at the end of therapy. CONCLUSION: Levofloxacin based ATT appears to be a safe and effective alternative of rifampicin in kidney transplant recipients who cannot afford heightened tacrolimus dosage.


Assuntos
Antituberculosos/uso terapêutico , Transplante de Rim/efeitos adversos , Levofloxacino/uso terapêutico , Infecções Oportunistas/tratamento farmacológico , Tuberculose/tratamento farmacológico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Antituberculosos/efeitos adversos , Países em Desenvolvimento/economia , Custos de Medicamentos , Feminino , Humanos , Hospedeiro Imunocomprometido , Imunossupressores/efeitos adversos , Índia , Transplante de Rim/economia , Levofloxacino/efeitos adversos , Levofloxacino/economia , Masculino , Pessoa de Meia-Idade , Infecções Oportunistas/economia , Infecções Oportunistas/imunologia , Infecções Oportunistas/microbiologia , Indução de Remissão , Estudos Retrospectivos , Fatores de Tempo , Resultado do Tratamento , Tuberculose/economia , Tuberculose/imunologia , Tuberculose/microbiologia , Adulto Jovem
5.
Mycoses ; 63(11): 1203-1214, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33090564

RESUMO

The genera Acremonium and Sarocladium comprise a high diversity of morphologically and genetically related fungi generally found in the environment, although a few species, mainly Sarocladium kiliense and Acremonium egyptiacum, can also be involved in many human infections. Clinical management of opportunistic infections caused by these fungi is very complex, since their correct identification is unreliable, and they generally show poor antifungal response. More than 300 clinical cases involving a broad range of Acremonium/Sarocladium infections have so far been published, and with this review we aim to compile and provide a detailed overview of the current knowledge on Acremonium/Sarocladium human infections in terms of presentation, diagnosis, treatments and prognoses. We also aim to summarise and discuss the data currently available on their antifungal susceptibility, emphasising the promising results obtained with voriconazole as well as their impact in terms of animal infections.


Assuntos
Hypocreales , Micoses , Infecções Oportunistas , Acremonium/classificação , Acremonium/efeitos dos fármacos , Acremonium/isolamento & purificação , Acremonium/patogenicidade , Animais , Antifúngicos/uso terapêutico , Artrite/tratamento farmacológico , Artrite/microbiologia , Sangue/microbiologia , Infecções do Sistema Nervoso Central/tratamento farmacológico , Infecções do Sistema Nervoso Central/microbiologia , Dermatomicoses/tratamento farmacológico , Farmacorresistência Fúngica , Endocardite/tratamento farmacológico , Endocardite/microbiologia , Infecções Oculares/tratamento farmacológico , Infecções Oculares/microbiologia , Humanos , Hypocreales/classificação , Hypocreales/efeitos dos fármacos , Hypocreales/isolamento & purificação , Hypocreales/patogenicidade , Infecções Fúngicas Invasivas/tratamento farmacológico , Infecções Fúngicas Invasivas/patologia , Micetoma/tratamento farmacológico , Micoses/tratamento farmacológico , Micoses/patologia , Micoses/veterinária , Onicomicose/tratamento farmacológico , Onicomicose/microbiologia , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/patologia , Infecções Oportunistas/veterinária , Osteomielite/tratamento farmacológico , Osteomielite/microbiologia , Peritonite/tratamento farmacológico , Peritonite/microbiologia , Infecções Respiratórias/tratamento farmacológico , Infecções Respiratórias/microbiologia , Voriconazol/uso terapêutico
6.
Artigo em Inglês | MEDLINE | ID: mdl-31988099

RESUMO

Amphotericin B (AmB) is the antifungal with the strongest fungicidal activity, but its use has several limitations, mainly associated with its toxicity. Although some lipidic and liposomal formulations that present reduced toxicity are available, their price limits their application in developing countries. Flucytosine (5FC) has shown synergistic effect with AmB for treatment of some fungal infections, such as cryptococcosis, but again, its price is a limitation for its use in many regions. In the present work, we aimed to identify new drugs that have a minor effect on Cryptococcus neoformans, reducing its growth in the presence of subinhibitory concentrations of AmB. In the initial screening, we found fourteen drugs that had this pattern. Later, checkerboard assays of selected compounds, such as erythromycin, riluzole, nortriptyline, chenodiol, nisoldipine, promazine, chlorcyclizine, cloperastine, and glimepiride, were performed and all of them confirmed for their synergistic effect (fractional inhibitory concentration index [FICI] < 0.5). Additionally, toxicity of these drugs in combination with AmB was tested in mammalian cells and in zebrafish embryos. Harmless compounds, such as the antibiotic erythromycin, were found to have synergic activity with AmB, not only against C. neoformans but also against some Candida spp., in particular against Candida albicans In parallel, we identified drugs that had antifungal activity against C. neoformans and found 43 drugs that completely inhibited the growth of this fungus, such as ciclopirox and auranofin. Our results expand our knowledge about antifungal compounds and open new perspectives in the treatment of invasive mycosis based on repurposing off-patent drugs.


Assuntos
Anfotericina B/farmacologia , Antifúngicos/farmacologia , Candida albicans/efeitos dos fármacos , Cryptococcus neoformans/efeitos dos fármacos , Reposicionamento de Medicamentos , Animais , Auranofina/farmacologia , Candidíase/tratamento farmacológico , Linhagem Celular , Ciclopirox/farmacologia , Criptococose/tratamento farmacológico , Avaliação Pré-Clínica de Medicamentos/métodos , Sinergismo Farmacológico , Eritromicina/farmacologia , Flucitosina/farmacologia , Humanos , Camundongos , Testes de Sensibilidade Microbiana , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/microbiologia , Células RAW 264.7 , Peixe-Zebra/embriologia
7.
Artigo em Inglês | MEDLINE | ID: mdl-31964790

RESUMO

Methicillin-resistant Staphylococcus aureus (MRSA) has become a significant acute and chronic respiratory pathogen. While vancomycin is effective against MRSA, its relatively poor penetration into lung secretions and dose-limiting renal toxicity make it less effective in the respiratory setting. As inhaled administration of vancomycin would overcome these limitations, we developed a dry powder formulation suitable for inhalation (AeroVanc). Here, we report a phase I, single-dose, dose-escalating study aimed at demonstrating safety and tolerability of AeroVanc. In part I, 18 healthy subjects received a single dose of 16 mg, 32 mg, or 80 mg of AeroVanc. Two subjects also received a 250-mg dose of intravenous vancomycin. In part 2 of the study, 32 mg and 80 mg AeroVanc were administered to subjects with cystic fibrosis as single doses. There were no serious side effects. A small drop in forced expiratory volume in 1 s (FEV1) was observed in 3 subjects with cystic fibrosis, one of whom required salbutamol. Vancomycin was rapidly absorbed after inhalation. Peak and mean plasma concentrations of vancomycin were dose proportional. The average minimum concentration of vancomycin in sputum remained above the usual MIC values for MRSA for up to 24 h (minimum sputum concentration [Cmin], 32-mg dose = 3.05 µg/ml, 80-mg dose = 8.0 µg/ml). In conclusion, AeroVanc was well tolerated and achieved high levels in sputum with a mean systemic absorption of 49%, making it a potential therapeutic strategy for respiratory infection with MRSA.


Assuntos
Antibacterianos/farmacocinética , Fibrose Cística/tratamento farmacológico , Staphylococcus aureus Resistente à Meticilina/efeitos dos fármacos , Infecções Oportunistas/tratamento farmacológico , Infecções Estafilocócicas/tratamento farmacológico , Vancomicina/farmacocinética , Administração por Inalação , Adolescente , Adulto , Antibacterianos/sangue , Antibacterianos/farmacologia , Fibrose Cística/sangue , Fibrose Cística/microbiologia , Inaladores de Pó Seco , Feminino , Volume Expiratório Forçado/efeitos dos fármacos , Volume Expiratório Forçado/fisiologia , Humanos , Masculino , Staphylococcus aureus Resistente à Meticilina/crescimento & desenvolvimento , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Infecções Oportunistas/sangue , Segurança do Paciente , Pós , Infecções Estafilocócicas/sangue , Vancomicina/sangue , Vancomicina/farmacologia
8.
J Ethnopharmacol ; 246: 112205, 2020 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-31476442

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Currently, more than two thirds of the world's 36.9 million people living with HIV/AIDS reside in Sub-Saharan Africa. Opportunistic infections (OI) associated with HIV are the single most important cause of mortality and morbidity among HIV/AIDS patients in poor countries. There is widespread use of medicinal plant species to manage the HIV infection and it's associated OI in Uganda, even by patients already on antiretroviral drugs (ARV). However, much of this information remains undocumented and unverified. AIM OF STUDY: The aim of this study was to systematically and comprehensively document the traditional indigenous knowledge and practices associated with the management of HIV/AIDS infections by herbalists in Uganda. METHODS: Ethnobotanical data were collected using semi-structured interviews and questionnaires. Ninety traditional medicine practitioners (TMP) or herbalists were interviewed in Arua, Dokolo, Mbale, Bushenyi, Iganga, Rakai, Luwero and Kaabong districts to gather information on the plant species used. Data were analysed and presented using descriptive statistics and the Informant Consensus Factor. RESULTS: We documented 236 medicinal plant species from 70 families and 201 genera. Acacia was the most widely represented genus with five species. The most frequently used medicinal plant species for treating various OI were Erythrina abyssinica (45), Warburgia ugandensis (43), Zanthoxylum chalybeum (38), Acacia hockii (37), Mangifera indica (36), Aloe vera (35), Albizia coriaria (34), Azadirachta indica (32), Psorospermum febrifugum (27) Vernonia amygdalina (22) and Gymnosporia senegalensis (21). Some of the plant species were used for treating all the OI mentioned. There is a high degree of consensus among the TMP on which plant species they use for the different OI, even though they are geographically separated. Herbalists contribute to the widespread practice of simultaneously using herbal medicines and ARV. Some TMP are also engaged in dangerous practices like injecting patients with herbs and encouraging simultaneous use of herbs and ARV. Although the TMP relied on biomedical laboratory diagnoses for confirming the patients' HIV sero status, they were familiar with the signs and symptoms of HIV/AIDS. CONCLUSION: There is wide spread use of a rich diversity of medicinal plants species and practices by TMP to manage OI in HIV/AIDS patients in Uganda.


Assuntos
Infecções por HIV/tratamento farmacológico , Conhecimentos, Atitudes e Prática em Saúde , Medicinas Tradicionais Africanas , Infecções Oportunistas/tratamento farmacológico , Fitoterapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Etnobotânica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Preparações de Plantas/uso terapêutico , Plantas Medicinais , Uganda , Adulto Jovem
9.
Mycoses ; 62(12): 1100-1107, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31365161

RESUMO

Saprochaete clavata is a rare cause of fungaemia with deep organ involvement in patients with haematological malignancies with reported mortality rates of 60%-80%. We describe four cases of S clavata infection in a haematology unit over several months that were treated with voriconazole-based regimens. We also review the literature on factors that could contribute to earlier recognition and effective treatment of S clavata. We included all cases of culture-positive S clavata from sterile sites with associated signs of infection in patients undergoing treatment for a haematological malignancy. Isolates were identified by MALDI-TOF MS, and spectrum profiles were used to prepare clustering analysis of isolates. Susceptibility testing was performed using a commercial microtitre methods. Saprochaete clavata was isolated from the bloodstream in three cases and bronchial alveolar lavage (BAL) fluid in one case. Clustering analysis suggested strains of S clavata were clonal without evidence of divergence although a common source was not identified. Susceptibility testing yielded elevated MICs to fluconazole (8 mg/L) and echinocandins (>1-8 mg/L). All patients were treated with voriconazole-based regimens resulting in survival of 3/4 patients, who continued chemotherapy for their underlying malignancy without evidence of relapse. Saprochaete clavata is a rare but aggressive cause of breakthrough yeast infection in patients undergoing treatment for haematological malignancies, particularly patients with a prior history of echinocandin treatment. Timely initiation of appropriate treatment, aided by more rapid identification in microbiology laboratory, can reduce the risk of deep organ dissemination and patient death.


Assuntos
Fungemia/etiologia , Neoplasias Hematológicas/complicações , Neoplasias Hematológicas/microbiologia , Adulto , Idoso , Antifúngicos/uso terapêutico , Surtos de Doenças , Feminino , Fungemia/tratamento farmacológico , Fungemia/microbiologia , Neoplasias Hematológicas/tratamento farmacológico , Humanos , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/microbiologia , Saccharomycetales/efeitos dos fármacos , Voriconazol/uso terapêutico
10.
J Eukaryot Microbiol ; 65(6): 934-939, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-29722096

RESUMO

The 14th International Workshops on Opportunistic Protists (IWOP-14) was held August 10-12, 2017 in Cincinnati, OH, USA. The IWOP meetings focus on opportunistic protists (OIs); for example, free-living amoebae, Pneumocystis spp., Cryptosporidium spp., Toxoplasma, the Microsporidia, and kinetoplastid flagellates. The highlights of Pneumocystis spp. research included the reports of primary homothallism for mating; a potential requirement for sexual replication in its life cycle; a new antigen on the surface of small asci; roles for CLRs, Dectin-1, and Mincle in host responses; and identification of MSG families and mechanisms used for surface variation. Studies of Cryptosporidia spp. included comparative genomics, a new cryopreservation method; the role of mucin in attachment and invasion, and epidemiological surveys illustrating species diversity in animals. One of the five identified proteins in the polar tube of Microsporidia, PTP4, was shown to play a role in host infection. Zebrafish were used as a low cost vertebrate animal model for an evaluation of potential anti-toxoplasma drugs. Folk medicine compounds with anti-toxoplasma activity were presented, and reports on the chronic toxoplasma infection provided evidence for increased tractability for the study of this difficult life cycle stage. Escape from the parasitophorus vacuole and cell cycle regulation were the topics of the study in the acute phase.


Assuntos
Eucariotos , Infecções Oportunistas/parasitologia , Animais , Antígenos de Protozoários , Congressos como Assunto , Cryptosporidium , Modelos Animais de Doenças , Eucariotos/patogenicidade , Humanos , Kinetoplastida , Lectinas Tipo C/metabolismo , Estágios do Ciclo de Vida , Microsporídios , Mucinas/metabolismo , Ohio , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/epidemiologia , Infecções Oportunistas/imunologia , Pneumocystis , Toxoplasma/patogenicidade , Toxoplasmose/tratamento farmacológico , Peixe-Zebra
11.
J Dermatol ; 45(5): 622-625, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29473215

RESUMO

Primary cutaneous aspergillosis is a rare, life-threatening fungal infection in premature infants. We report a case of primary cutaneous aspergillosis caused by Aspergillus tamarii in an extremely low birthweight infant. The infant was delivered by cesarean section with complications from an intrauterine infection, brain intraventricular hemorrhage, tension pneumothorax and cardiac tamponade. On the 12th day of life, he developed erythematous maceration with erosion on his back. Septate hyphae were detected on two occasions from specimens of the skin lesion. The manifestations of the colony and slide culture showed the characteristics of A. tamarii. The nucleotide sequences of internal transcribed spacer regions of the ribosomal RNA gene, partial sequences of ß-tubulin and calmodulin gene were compatible with those of A. tamarii. Of the known Aspergillus species, Aspergillus fumigatus and Aspergillus flavus have been reported in previous studies as the major causative agents in primary cutaneous aspergillosis, whereas human infection by A. tamarii is rare. We consider that A. tamarii is important as an unusual opportunistic human pathogen among premature infants.


Assuntos
Antifúngicos/uso terapêutico , Aspergilose/microbiologia , Aspergillus/patogenicidade , Dermatomicoses/microbiologia , Infecções Oportunistas/microbiologia , Administração Cutânea , Administração Intravenosa , Anfotericina B/uso terapêutico , Aspergilose/tratamento farmacológico , Aspergillus/isolamento & purificação , Cesárea , Clotrimazol/uso terapêutico , Dermatomicoses/tratamento farmacológico , Humanos , Recém-Nascido de Peso Extremamente Baixo ao Nascer , Recém-Nascido , Recém-Nascido Prematuro , Masculino , Pomadas , Infecções Oportunistas/tratamento farmacológico , Pele/microbiologia , Resultado do Tratamento
12.
Clin Infect Dis ; 67(2): 221-228, 2018 07 02.
Artigo em Inglês | MEDLINE | ID: mdl-29373647

RESUMO

Background: Eggerthella lenta is a anaerobic gram-positive bacilli associated with polymicrobial intraabdominal infections. Recently, E. lenta was recognized as an important cause of anaerobic bloodstream infections (BSIs) associated with high mortality. Eggerthella lenta has been reported to have high minimal inhibitory concentrations (MICs) to piperacillin-tazobactam (TZP), a broad-spectrum antibiotic with anaerobic coverage commonly used in multiple centers for empiric treatment of abdominal sepsis. Methods: We describe a retrospective population-based analysis of invasive E. lenta infections from 2009 through 2015. A logistic regression analysis for 30-day mortality risk factors was conducted. Results: We identified 107 E. lenta infections, 95 (89%) were BSIs, 11 (10%) skin and soft tissue infections, and 1 intraabdominal abscess. Polymicrobial infections were found in 40%; 72% of isolates were from a gastrointestinal source, most commonly appendicitis (33%) of which two-thirds were perforated. TZP MIC50 and MIC90 for E. lenta isolates were 32 µg/mL and 64 µg/mL, respectively. The overall 30-day mortality for BSI was 23% and was independently associated with empiric TZP monotherapy (odds ratio [OR], 4.4; 95% confidence interval [CI], 1.2-16; P = .02) and intensive care unit stay (OR, 6.2; 95% CI, 1.4-27.3; P = .01). Thirty-day mortality rates were significantly influenced by the use of different TZP MIC breakpoints. Conclusions: Our results demonstrate the increased recognition of E. lenta as an anaerobic opportunistic pathogen and highlight the need for improved empiric antimicrobial guidelines and TZP MIC breakpoints with better correlation to clinical outcomes to guide appropriate management of invasive E. lenta infections.


Assuntos
Antibacterianos/uso terapêutico , Bacteriemia/mortalidade , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Infecções por Bactérias Gram-Positivas/mortalidade , Combinação Piperacilina e Tazobactam/uso terapêutico , Actinobacteria/efeitos dos fármacos , Actinobacteria/isolamento & purificação , Idoso , Bacteriemia/tratamento farmacológico , Bactérias Anaeróbias/efeitos dos fármacos , Bactérias Anaeróbias/isolamento & purificação , Gerenciamento Clínico , Feminino , Humanos , Modelos Logísticos , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/microbiologia , Vigilância em Saúde Pública , Estudos Retrospectivos , Fatores de Risco , Resultado do Tratamento
13.
Exp Clin Transplant ; 16(1): 110-113, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27143150

RESUMO

Cryptococcal meningitis is a critical illness affecting 0.2% to 5% solid-organ transplant recipients with a 40% to 50% mortality. We report the case of a 48-year-old lung transplant recipient, who, 15 months after a right lung graft, kept parakeets and developed meningitis due to Cryptococcus neoformans. Immunosuppressive treatment was based on a quadruple sequential immunosuppressive therapy that included induction therapy with thymoglobulin, followed by corticosteroids, calcineurin inhibitors, and mycophenolate mofetil. Antifungal susceptibility testing of Cryptococcus neoformans showed resistance to flucytosine and intermediate sensitivity to fluconazole. Initial treatment adhered to international guidelines; however, the patient could not tolerate an effective double-antifungal therapy during the first 2 months of treatment. Despite this delayed treatment for an aggressive infection in an immunocompromised patient, the patient survived without relapse and received maintenance treatment with fluconazole during the course of 3 years. Administration of calcineurin inhibitors as immunosuppressive treatment may partly explain this outcome, as this therapeutic class is known to protect from severe forms of cryptococcal meningitis.


Assuntos
Antifúngicos/uso terapêutico , Cryptococcus neoformans/efeitos dos fármacos , Farmacorresistência Fúngica , Flucitosina/uso terapêutico , Transplante de Pulmão/efeitos adversos , Meningite Criptocócica/tratamento farmacológico , Infecções Oportunistas/tratamento farmacológico , Cryptococcus neoformans/imunologia , Cryptococcus neoformans/patogenicidade , Substituição de Medicamentos , Feminino , Humanos , Hospedeiro Imunocomprometido , Imunossupressores/efeitos adversos , Meningite Criptocócica/diagnóstico , Meningite Criptocócica/imunologia , Meningite Criptocócica/microbiologia , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Infecções Oportunistas/diagnóstico , Infecções Oportunistas/imunologia , Infecções Oportunistas/microbiologia , Fatores de Risco , Resultado do Tratamento
14.
Int J Tuberc Lung Dis ; 21(11): 1155-1159, 2017 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-29037296

RESUMO

SETTING: Tuberculosis (TB) in solid-organ transplants (SOTs) is an important opportunistic infection associated with mortality and graft loss. SOT recipients carry a higher risk of contracting active TB than the general population. Clinical and radiographic presentations are non-specific, and sputum smear and culture have low yields. TB patients with SOTs require standard anti-tuberculosis treatment. However, rifampicin (RMP) use is associated with a 30% rate of acute graft rejection (AGR) and a 20% rate of transplant loss. OBJECTIVE: To determine treatment outcomes in SOT recipients with active TB. DESIGN: A retrospective study of clinical and microbiological data and TB treatment outcomes. RESULTS: Among the 2349 transplants assessed, active TB was detected in 31 recipients; 55% had pulmonary TB and 40% were sputum smear-positive. In 32% of the patients, TB was diagnosed 30 days after symptom onset, 77% of the patients were cured and 10% died. AGR occurred in 13%. CONCLUSION: TB was diagnosed in <30 days. Anti-tuberculosis treatment without RMP (80% vs. 67%; P = 0.48, OR 0.5, 95%CI 0.07-3.55) and with moxifloxacin yielded higher treatment success rates and a lower risk of AGR.


Assuntos
Antituberculosos/uso terapêutico , Infecções Oportunistas/epidemiologia , Transplantados , Tuberculose/epidemiologia , Adolescente , Adulto , Colômbia/epidemiologia , Feminino , Fluoroquinolonas/uso terapêutico , Rejeição de Enxerto/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Moxifloxacina , Infecções Oportunistas/tratamento farmacológico , Transplante de Órgãos , Estudos Retrospectivos , Rifampina/uso terapêutico , Fatores de Risco , Escarro/microbiologia , Resultado do Tratamento , Tuberculose/tratamento farmacológico , Tuberculose Pulmonar/tratamento farmacológico , Tuberculose Pulmonar/epidemiologia , Adulto Jovem
15.
Ann Hematol ; 96(5): 879-880, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-28213751

Assuntos
Anticorpos Monoclonais Humanizados/efeitos adversos , Imunossupressores/efeitos adversos , Infecções Meningocócicas/fisiopatologia , Neisseria meningitidis Sorogrupo W-135/imunologia , Infecções Oportunistas/fisiopatologia , Microangiopatias Trombóticas/complicações , Síndrome de Waterhouse-Friderichsen/etiologia , Injúria Renal Aguda/complicações , Injúria Renal Aguda/etiologia , Injúria Renal Aguda/imunologia , Injúria Renal Aguda/terapia , Adulto , Antibacterianos/uso terapêutico , Anticorpos Monoclonais Humanizados/uso terapêutico , Ciprofloxacina/uso terapêutico , Terapia Combinada , Coagulação Intravascular Disseminada/complicações , Coagulação Intravascular Disseminada/etiologia , Coagulação Intravascular Disseminada/terapia , Humanos , Hospedeiro Imunocomprometido , Imunossupressores/uso terapêutico , Unidades de Terapia Intensiva , Lúpus Eritematoso Sistêmico/complicações , Lúpus Eritematoso Sistêmico/tratamento farmacológico , Lúpus Eritematoso Sistêmico/imunologia , Lúpus Eritematoso Sistêmico/fisiopatologia , Masculino , Infecções Meningocócicas/complicações , Infecções Meningocócicas/tratamento farmacológico , Infecções Meningocócicas/microbiologia , Neisseria meningitidis Sorogrupo W-135/efeitos dos fármacos , Neisseria meningitidis Sorogrupo W-135/isolamento & purificação , Infecções Oportunistas/complicações , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/microbiologia , Síndrome Respiratória Aguda Grave/complicações , Síndrome Respiratória Aguda Grave/etiologia , Síndrome Respiratória Aguda Grave/imunologia , Síndrome Respiratória Aguda Grave/terapia , Choque Séptico/complicações , Choque Séptico/etiologia , Choque Séptico/imunologia , Choque Séptico/terapia , Microangiopatias Trombóticas/etiologia , Microangiopatias Trombóticas/imunologia , Microangiopatias Trombóticas/prevenção & controle , Resultado do Tratamento , Síndrome de Waterhouse-Friderichsen/imunologia , Síndrome de Waterhouse-Friderichsen/microbiologia , Síndrome de Waterhouse-Friderichsen/prevenção & controle , Adulto Jovem
16.
J Pediatr Hematol Oncol ; 39(4): e211-e215, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-27841827

RESUMO

Rhino-orbital-cerebral mucormycosis (ROCM) is a rare fulminant opportunistic fungal infection that despite relevant treatment has high mortality. We present a case of a 3-year-old girl with acute lymphoblastic leukemia and ROCM, who was treated successfully with excessive surgery, systemic antifungal treatment with amphotericin B (AmB), posaconazole, and terbinafine as well as hyperbaric oxygen. Surgery included, beside extracranial and intracranial removal of infected areas, endoscopic sinus and skull base surgery with local AmB installation and in addition placement of an Ommaya reservoir for 114 intrathecal administrations of AmB. In addition, we review the literature of ROCM in pediatric patients with hematological diseases.


Assuntos
Antifúngicos/uso terapêutico , Mucormicose/tratamento farmacológico , Mucormicose/cirurgia , Leucemia-Linfoma Linfoblástico de Células Precursoras/complicações , Anfotericina B/administração & dosagem , Anfotericina B/uso terapêutico , Encéfalo/microbiologia , Encéfalo/patologia , Pré-Escolar , Feminino , Humanos , Oxigenoterapia Hiperbárica , Mucormicose/patologia , Naftalenos/uso terapêutico , Nariz/microbiologia , Nariz/patologia , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/etiologia , Infecções Oportunistas/cirurgia , Órbita/microbiologia , Órbita/patologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Terbinafina , Triazóis/uso terapêutico
17.
Transpl Infect Dis ; 19(1)2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27775824

RESUMO

Nontuberculous mycobacterial infections can often occur in individuals with adequate immune function. Such infections typically have cutaneous involvement and are caused by rapidly growing mycobacterium. Other nontuberculous mycobacteria species, like Mycobacterium haemophilum, almost always present as opportunistic infections occurring in severely immunocompromised hosts. Here, we present a complicated and protracted course of diagnosing M. haemophilum lower extremity cutaneous infection in a matched-unrelated donor stem cell transplant recipient.


Assuntos
Antibacterianos/uso terapêutico , Celulite (Flegmão)/tratamento farmacológico , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , Leucemia Mieloide Aguda/cirurgia , Infecções por Mycobacterium não Tuberculosas/tratamento farmacológico , Mycobacterium haemophilum/isolamento & purificação , Infecções Oportunistas/tratamento farmacológico , Biópsia , Celulite (Flegmão)/complicações , Celulite (Flegmão)/diagnóstico , Celulite (Flegmão)/microbiologia , Ciprofloxacina/uso terapêutico , Claritromicina/uso terapêutico , Feminino , Doença Enxerto-Hospedeiro/diagnóstico , Doença Enxerto-Hospedeiro/tratamento farmacológico , Humanos , Hospedeiro Imunocomprometido , Terapia de Imunossupressão/efeitos adversos , Imunossupressores/efeitos adversos , Imunossupressores/uso terapêutico , Extremidade Inferior , Pessoa de Meia-Idade , Infecções por Mycobacterium não Tuberculosas/complicações , Infecções por Mycobacterium não Tuberculosas/diagnóstico , Infecções por Mycobacterium não Tuberculosas/microbiologia , Infecções Oportunistas/complicações , Infecções Oportunistas/diagnóstico , Infecções Oportunistas/microbiologia , Rifabutina/uso terapêutico , Tacrolimo/efeitos adversos , Tacrolimo/uso terapêutico , Doadores não Relacionados
18.
Mycopathologia ; 181(3-4): 285-90, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26493614

RESUMO

Trichosporon species are opportunistic yeasts which can cause infections, especially in immunocompromised patients. This is a report of Trichosporon ovoides that caused subcutaneous infection in a patient with underlying ischemic heart disease. The identification of fungal isolate was confirmed by PCR sequencing of ITS and large subunit regions in rRNA gene. In vitro susceptibility study showed that the isolate was susceptible to amphotericin B, fluconazole and voriconazole, and resistant to caspofungin, anidulafungin and itraconazole. The lesion improved after treatment with oral fluconazole and topical miconazole.


Assuntos
Antifúngicos/uso terapêutico , Dermatomicoses/tratamento farmacológico , Hospedeiro Imunocomprometido , Infecções Oportunistas/tratamento farmacológico , Trichosporon/efeitos dos fármacos , Tricosporonose/tratamento farmacológico , DNA Intergênico/genética , Dermatomicoses/microbiologia , Feminino , Fluconazol/uso terapêutico , Humanos , Miconazol/uso terapêutico , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Infecções Oportunistas/microbiologia , Reação em Cadeia da Polimerase , Trichosporon/genética , Trichosporon/isolamento & purificação , Tricosporonose/microbiologia
19.
Vestn Ross Akad Med Nauk ; 71(3): 183-9, 2016.
Artigo em Russo | MEDLINE | ID: mdl-29297622

RESUMO

Background: Antibiotic tolerance (AT) represents one of the causes of the phenomenon of antibiotic resistance that allows escape of non-replicating metabolically inert microorganisms (persisters) from any antibiotics attack because molecular targets of antibiotics are lacking thereby creating the potential for chronic infections. Aims: Determine the heterogeneity of the strains of opportunistic pathogens E. coli and P. aeruginosa isolates from children with hematologic malignancies containing bacterial persisters that cause the AT phenomenon. Methods: Children with hematological malignancies were divided into 2 groups according to the intensity of antibiotic treatment of infectious complications. Ciprofloxacin-induced persisters were quantitatively determined in the biological materials obtained from sick children. Results: Within the clinical isolates of E. coli and P. aeruginosa, about a third of the strains belong to high-persisting. The numbers of persistent forms of bacteria did not correlate with a minimal inhibitory concentration values ciprofloxacin (r=0.148, n=25, p>0.05). Interestingly, higher level of formation of persistent E. coli and P. aeruginosa, is associated with higher frequencies of infection attacks, massive antibiotic use and unfavorable course of the disease in children. Conclusions: Therefore, detecting the persistent forms of bacterial pathogens including those associated with the health-care associated infection, specifically, in immunocompromised patients, should be included into the contemporary algorithms of microbiological observation and monitoring of patients and intrahospital environment.


Assuntos
Ciprofloxacina/uso terapêutico , Tolerância a Medicamentos , Escherichia coli , Neoplasias Hematológicas , Infecções Oportunistas , Pseudomonas aeruginosa , Adolescente , Antibacterianos/uso terapêutico , Criança , Infecção Hospitalar/prevenção & controle , Resistência Microbiana a Medicamentos/efeitos dos fármacos , Escherichia coli/efeitos dos fármacos , Escherichia coli/isolamento & purificação , Feminino , Neoplasias Hematológicas/complicações , Neoplasias Hematológicas/microbiologia , Humanos , Hospedeiro Imunocomprometido/efeitos dos fármacos , Masculino , Testes de Sensibilidade Microbiana/métodos , Infecções Oportunistas/diagnóstico , Infecções Oportunistas/tratamento farmacológico , Infecções Oportunistas/etiologia , Pseudomonas aeruginosa/efeitos dos fármacos , Pseudomonas aeruginosa/isolamento & purificação
20.
J Ethnopharmacol ; 171: 109-15, 2015 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-26023032

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: The aim of the study was to identify and document plants traditionally used to manage HIV and treat its opportunistic infections (OIs) in Mpoza, a rural village located in the Mount Frere Alfred Nzo District, Eastern Cape Province, South Africa. MATERIALS AND METHODS: Semi-structured interviews and focus group discussions (FGDs) were conducted with 18 traditional health practitioners from January 2012 to August 2012 to obtain information about medicinal plants used in the management of HIV and treatment of OIs. RESULTS: Seventeen plant species belonging to 12 families were identified for the management of HIV and treatment of OIs in Mpoza. The identified plant species belonged mostly to the families Asparagaceae (12%), Araliaceae (12%), Apiaceae (12%), Xanthorrhoeaceae (12%) and Lamiaceae (12%). The remaining 40% of identified plant species was evenly split over seven families - Urticaceae, Hypoxidaceae, Leguminosae, Verbenaceae, Rosaceae, Compositae and Rutaceae. The most frequently used medicinal plants were Hypoxis hemerocallidea (85%), Asparagus densiflorus (68%) and Lessertia frutescens (68%). The leaves (43.5%) and roots (21.7%) were the most frequently used plant parts, usually prepared as infusions and decoctions for oral administration. CONCLUSION: This study provides documentation of medicinal plants used in the management of HIV and treatment of commonly associated OIs, which might provide a potential lead that will significantly contribute in reducing the burden of HIV infections in South Africa. We envisage that this paper will provide some background for further studies in developing new, effective, safe and affordable plant-derived medicines.


Assuntos
Infecções por HIV/tratamento farmacológico , Medicinas Tradicionais Africanas , Infecções Oportunistas/tratamento farmacológico , Fitoterapia , Preparações de Plantas/uso terapêutico , Plantas Medicinais , Adulto , Idoso , Idoso de 80 Anos ou mais , Etnobotânica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , África do Sul
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