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Cryptococcus

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https://www.readbyqxmd.com/read/29150507/divalent-metal-cations-potentiate-the-predatory-capacity-of-amoeba-for-cryptococcus-neoformans
#1
Man Shun Fu, Arturo Casadevall
Among the best studied interaction between soil phagocytic predators and a human pathogenic fungus is that of Acanthamoeba castellanii and Cryptococcus neoformans The experimental conditions used in amoeba-fungal confrontation assays can have major effects on whether the fungus or the protozoan is ascendant in the interaction. In the presence of Mg(2+) and Ca(2+) in PBS, C. neoformans was consistently killed when incubated with A. castellanii. A. castellanii survived better in the presence of Mg(2+) and Ca(2+), even when incubated with C...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29146247/distribution-of-apple-and-blackcurrant-microbiota-in-lithuania-and-the-czech-republic
#2
Iglė Vepštaitė-Monstavičė, Juliana Lukša, Ramunė Stanevičienė, Živilė Strazdaitė-Žielienė, Vyacheslav Yurchenko, Saulius Serva, Elena Servienė
The microbial assemblies on the surface of plants correlate with specific climatic features, suggesting a direct link between environmental conditions and microbial inhabitation patterns. At the same time however, microbial communities demonstrate distinct profiles depending on the plant species and region of origin. In this study, we report Next Generation Sequencing-based metagenomic analysis of microbial communities associated with apple and blackcurrant fruits harvested from Lithuania and the Czech Republic...
January 2018: Microbiological Research
https://www.readbyqxmd.com/read/29144957/fluconazole-levels-in-serum-and-cerebrospinal-fluid-according-to-daily-dosage-in-patients-with-cryptococcosis-and-other-fungal-infections
#3
Letícia Aparecida Schiave, Erika Nascimento, Fernando Crivelenti Vilar, Tissiana Marques de Haes, Osvaldo Massaiti Takayanagui, Cristiane Masetto de Gaitani, Roberto Martinez
Fluconazole is extensively used for the treatment of candidiasis and cryptococcosis. Among other factors, successful treatment is related to appropriate fluconazole levels in blood and cerebrospinal fluid (CSF). In the present study, fluconazole levels were determined in 15 patients, 14 of whom had AIDS and 13 had neurocryptococcosis. The only selection criterion was treatment with fluconazole, which was performed with a generic or similar form of the drug. Fluconazole level was determined by high performance liquid chromatography and the susceptibility profile of Cryptococcus spp...
November 13, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29133871/exploration-of-antifungal-and-immunomodulatory-potentials-of-a-furanone-derivative-to-rescue-disseminated-cryptococosis-in-mice
#4
Sudarshan Singh Rathore, Muthukrishnan Isravel, Sridharan Vellaisamy, David Raj Chellappan, Lalitha Cheepurupalli, Thiagarajan Raman, Jayapradha Ramakrishnan
Cryptococcus neoformans infection is quite complex with both host-pathogen interaction and host immune profile determining disease progress and therapeutic outcome. Hence in the present study, the potential utility of (E)-5-benzylidenedihydrofuran-2(3 H)-one (compound-6) was explored as an effective anticryptococcal compound with immunomodulatory potential. The efficacy of compound-6 in pulmonary cryptococosis model using H99 strain was investigated. The effective dose was found to provide 100% survival, with a significant reduction of yeast burden in lungs and brain...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29130027/cryptococcosis-today-it-is-not-all-about-hiv-infection
#5
Jane A O'Halloran, William G Powderly, Andrej Spec
Purpose of the review: Cryptococcal disease is most often thought of in the context of HIV infection. Much of our knowledge of the disease originates from its management in the HIV-positive population over the last 30 years. While the majority of cases globally continue to occur in the setting of advanced HIV, Cryptococcus species is increasingly responsible for disease in HIV-negative populations including those considered normal hosts and these HIV-negative populations will be the focus of this review...
June 2017: Current Clinical Microbiology Reports
https://www.readbyqxmd.com/read/29129578/cryptococcosis-in-an-infectious-diseases-hospital-of-buenos-aires-argentina-revision-of-2041-cases-diagnosis-clinical-features-and-therapeutics
#6
Alicia Arechavala, Ricardo Negroni, Fernando Messina, Mercedes Romero, Emmanuel Marín, Roxana Depardo, Laura Walker, Gabriela Santiso
BACKGROUND: Cryptococcosis is still a life-threatening mycosis that continues to be of serious concern in Latin American countries, especially among HIV+positive population. However, there is not any reliable information about the prevalence of this disease in this region. AIMS: The aim of this study is to report data of 2041 patients with cryptococcosis that were attended at the Infectious Diseases Hospital F. J. Muñiz over a 30 year-period. METHODS: Information about demographic and clinical data, survival time and the applied treatment, was taken from the Mycology Unit database...
November 9, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/29127615/fungal-and-parasitic-cns-infections
#7
Pratibha Singhi, Arushi Gahlot Saini
Central nervous system fungal infections can be broadly divided into those that infect a healthy host such as Cryptococcus, Coccidioides, Histoplasma, Blastomyces, Sporothrix spp., and those that cause opportunistic infections in an immunocompromised host such as Candida, Aspergillus, Zygomycetes, Trichosporon spp. The clinical manifestations of central nervous system fungal infections commonly seen in children in clinical practice include a chronic meningitis or meningoencephalitis syndrome, brain abscess, rhino-cerebral syndrome and rarely, a fungal ventriculitis...
November 11, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/29125786/novel-recombinant-multiepitope-proteins-for-the-detection-of-anti-cryptococcus-antibodies
#8
Rafael Melo Santos de Serpa Brandão, Angélica Rosa Faria, Hélida Monteiro de Andrade, Liline Maria Soares Martins, Adalberto Socorro da Silva, Semiramis Jamil Hadad do Monte
AIM: To produce and test recombinant multiepitope proteins as an alternative assay for the serological diagnosis of cryptococcosis. MATERIALS & METHODS: Previously, synthetic peptides were used to detect anti-Cryptococcus antibodies, and in silico analyses showed that the union of peptides would improve the results. Here, the coding sequences of these peptides were assembled into synthetic genes. Four genes have been cloned and expressed in Escherichia coli, producing recombinant multiepitope proteins: proteins A, B, C and D...
November 10, 2017: Future Microbiology
https://www.readbyqxmd.com/read/29123908/a-case-of-disseminated-cryptococcosis-with-necrotizing-fasciitis-in-a-non-hiv-patient
#9
Tetsuya Hoshino, Kazuya Omura, Shinichi Kimura, Hiroyuki Takahashi, Katsuhiko Kamei, Misako Ohkusu
Case: Disseminated cryptococcosis is a well-recognized condition among HIV patients, but it also occurs in non-HIV patients. Necrotizing fasciitis caused by cryptococcus is rare. An 81-year-old man who had received steroid therapy presented with erythema and pain in his right thigh. After the rapid progression of symptoms and a failure to respond to antibiotic therapy, a clinical diagnosis of necrotizing fasciitis was made. We performed debridement, and yeasts were detected using a Gram stain of the fascia...
October 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29116307/cryptococcoma-mimicking-a-brain-tumor-in-an-immunocompetent-patient-case-report-of-an-extremely-rare-presentation
#10
Aline Lariessy Campos Paiva, Guilherme Brasileiro de Aguiar, Renan Maximilian Lovato, Arthus Vilar Deolindo Zanetti, Alexandros Theodoros Panagopoulos, José Carlos Esteves Veiga
CONTEXT: Central nervous system (CNS) infectious diseases have high prevalence in developing countries and their proper diagnosis and treatment are very important for public health planning. Cryptococcus neoformans is a fungus that may cause several CNS manifestations, especially in immunocompromised patients. Cryptococcal meningitis is the most common type of involvement. Mass-effect lesions are uncommon: they are described as cryptococcomas and their prevalence is even lower among immunocompetent patients...
November 6, 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/29113016/cryptococcal-dissemination-to-the-central-nervous-system-requires-the-vacuolar-calcium-transporter-pmc1
#11
Eamim D Squizani, Natália K Oliveira, Júlia C V Reuwsaat, Bárbara M Marques, William Lopes, Alexandra L Gerber, Ana Tereza R de Vasconcelos, Sophie Lev, Julianne T Djordjevic, Augusto Schrank, Marilene H Vainstein, Charley C Staats, Lívia Kmetzsch
Cryptococcus neoformans is a basidiomycetous yeast and the cause of cryptococcosis in immunocompromised individuals. The most severe form of the disease is meningoencephalitis, which is one of the leading cause of death in HIV/AIDS patients. In order to access the central nervous system (CNS), C. neoformans relies on the activity of certain virulence factors such as urease, which allows transmigration through the blood-brain barrier (BBB). In the present study, we demonstrate that the calcium transporter Pmc1 enables C...
November 7, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/29109169/environmental-triazole-induces-cross-resistance-to-clinical-drugs-and-affects-morphophysiology-and-virulence-of-cryptococcus-gattii-and-c-neoformans
#12
Rafael Wesley Bastos, Hellem Cristina Silva Carneiro, Lorena Vívien Neves de Oliveira, Karen Maia Rocha, Gustavo José Cota Freitas, Marliete Carvalho Costa, Thaís Furtado Ferreira Magalhães, Vanessa Silva Dutra de Carvalho, Cláudia Emanuela Rocha, Gabriella Freitas Ferreira, Tatiane Alves de Paixão, Frédérique Moyrand, Guilhem Janbon, Daniel Assis Santos
Cryptococcus gattii and Cryptococcus neoformans are environmental fungi that cause cryptococcosis, which is usually treated with amphotericin B and fluconazole. However, therapeutic failure is increasing because of the emergence of resistant strains. Because these species are constantly isolated from vegetal materials and the usage of agrochemicals is growing, we postulate pesticides could be responsible for the altered susceptibility of these fungi to clinical drugs. Therefore, we evaluated the influence of the pesticide tebuconazole on the susceptibility to clinical drugs, morphophysiology, and virulence of C...
November 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29104281/incidental-finding-of-cryptococcus-on-prostate-biopsy-for-prostate-adenocarcinoma-following-cardiac-transplant-case-report-and-review-of-the-literature
#13
Sujal I Shah, Hai Bui, Nelson Velasco, Shilpa Rungta
BACKGROUND Cryptococcus is the third most common invasive fungal organism in immunocompromised patients, including transplant patients, and usually involves the central nervous system and lungs, with a median time to infection of 25 months. We report a case of Cryptococcus of the prostate gland, found as an incidental finding on prostate biopsy for prostate adenocarcinoma, four months following cardiac transplantation. CASE REPORT A 62-year-old male African-American who had a cardiac transplant four months previously, underwent a six-core prostate biopsy for a two-year history of increasing prostate-specific antigen (PSA) levels, and a recent history of non-specific urinary tract symptoms...
November 6, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29103990/a-call-to-arms-quest-for-a-cryptococcal-vaccine
#14
REVIEW
Marley C Caballero Van Dyke, Floyd L Wormley
Cryptococcosis remains a significant cause of morbidity and mortality world-wide, particularly among AIDS patients. Yet, to date, there are no licensed vaccines clinically available to treat or prevent cryptococcosis. In this review, we provide a rationale to support continued investment in Cryptococcus vaccine research, potential challenges that must be overcome along the way, and a literature review of the current progress underway towards developing a vaccine to prevent cryptococcosis.
November 2, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/29102684/overview-of-selected-virulence-attributes-in-aspergillus-fumigatus-candida-albicans-cryptococcus-neoformans-trichophyton-rubrum-and-exophiala-dermatitidis
#15
REVIEW
Hazal Boral, Banu Metin, Aylin Döğen, Seyedmojtaba Seyedmousavi, Macit Ilkit
The incidence of fungal diseases has been increasing since 1980, and is associated with excessive morbidity and mortality, particularly among immunosuppressed patients. Of the known 625 pathogenic fungal species, infections caused by the genera Aspergillus, Candida, Cryptococcus, and Trichophyton are responsible for more than 300 million estimated episodes of acute or chronic infections worldwide. In addition, a rather neglected group of opportunistic fungi known as black yeasts and their filamentous relatives cause a wide variety of recalcitrant infections in both immunocompetent and immunosuppressed hosts...
November 1, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/29102114/in-vivo-probiotic-and-antimicrobial-photodynamic-therapy-as-alternative-therapies-against-cryptococcosis-are-ineffective
#16
Lorena Vívien Neves de Oliveira, Rafael Wesley Bastos, Noelly de Queiroz Ribeiro, Marliete Carvalho Costa, Leonardo Borges Acurcio, Karen Maia Rocha, Julliana Ribeiro Alves Santos, Rosana de Carvalho Cruz, Betânia Maria Soares, Daniel Assis Santos
Cryptococcosis, an invasive fungal infection distributed worldwide that affects both domestic and wild animals, has incredible rates regarding treatment failure, leading to the necessity of the development of new therapies. In this way, we aimed to evaluate the probiotic (Saccharomyces boulardii, Lactobacillus paracasei ST-11, and Lactobacillus rhamnosus GG) and antimicrobial photodynamic alternative therapies against Cryptococcus gattii in a murine model. Although previous studies suggest that these therapies can be promising against cryptococcosis, our experimental conditions for both probiotic and antimicrobial photodynamic therapies (aPDT) were not able to improve the survival of mice with cryptococcosis, even with the treatment combined with fluconazole...
November 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/29095556/antibacterial-and-antifungal-activity-activity-of-pyroligneous-acid-from-wood-of-eucalyptus-urograndis-and-mimosa-tenuiflora
#17
Eduardo de Souza Araújo, Alexandre Santos Pimenta, Francisco M C Feijó, Renato Vinicius Oliveira Castro, Maíra Fasciotti, Thays V C Monteiro, Kássio Michel Gomes de Lima
AIMS: The present work aimed to evaluate the antibacterial and antifungal activity of two types of pyroligneous acid (PA) obtained from slow pyrolysis of wood of Mimosa tenuiflora and of a hybrid of Eucalyptus urophylla x Eucalyptus grandis. METHODS AND RESULTS: Wood wedges were carbonized on a heating rate of 1.25°C/min until 450°C. Pyrolysis smoke was trapped and condensed to yield liquid products. Crude pyrolysis liquids were bi-distilled under 5 mmHg vacuum yielding purified PA...
November 2, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29093251/-magnetic-resonance-imaging-features-of-cryptococcus-infection-in-central-nervous-system-in-patients-with-aids
#18
Chuanjun Xu, Zhiliang Hu, Hongxia Wei, Yongfeng Yang, Chao Du, Jianping Gu
To investigate the magnetic resonance imaging (MRI) features of Cryptococcus infection in central nervous system patients with acquired immune deficiency syndrome (AIDS).
 Methods: The retrospective study on magnetic resonance imaging (MRI) and clinical data of cryptococcal meningitis (CM) was carried out between July 2011 and March 2017. These patients had not received anti-retroviral treatment. Patients with other specific or suspicious diseases in the central nervous system were not included in the analysis...
October 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29091142/-retracted-article-distribution-and-association-between-environmental-and-clinical-isolates-of-cryptococcus-neoformans-in-bogot%C3%A3-colombia-2012-2015
#19
(no author information available yet)
[This retracts the article doi: 10.1590/0074-02760160201].
November 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/29089435/cryptococcus-neoformans-iron-sulfur-protein-biogenesis-machinery-is-a-novel-layer-of-protection-against-cu-stress
#20
Sarela Garcia-Santamarina, Marta A Uzarska, Richard A Festa, Roland Lill, Dennis J Thiele
Copper (Cu) ions serve as catalytic cofactors to drive key biochemical processes, and yet Cu levels that exceed cellular homeostatic control capacity are toxic. The underlying mechanisms for Cu toxicity are poorly understood. During pulmonary infection by the fungal pathogen Cryptococcus neoformans, host alveolar macrophages compartmentalize Cu to the phagosome, and the ability to detoxify Cu is critical for its survival and virulence. Here, we report that iron-sulfur (Fe-S) clusters are critical targets of Cu toxicity in both Saccharomyces cerevisiae and C...
October 31, 2017: MBio
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