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Leila M Lopes-Bezerra, Hector M Mora-Montes, Yu Zhang, Gustavo Nino-Vega, Anderson Messias Rodrigues, Zoilo Pires de Camargo, Sybren de Hoog
The description of cryptic species with different pathogenic potentials has changed the perspectives on sporotrichosis. Sporothrix schenckii causes a benign chronic subcutaneous mycosis, Sporothrix brasiliensis is highly virulent, and Sporothrix globosa mainly causes fixed cutaneous lesions. Furthermore, S. brasiliensis is the prevalent species related to cat-transmitted sporotrichosis. Sources of infection, transmission, and distribution patterns also differ between species, and variability differs between species because of different degrees of clonality...
April 1, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
Leila M Lopes-Bezerra, Louise A Walker, Gustavo Niño-Vega, Héctor M Mora-Montes, Gabriela W P Neves, Hector Villalobos-Duno, Laura Barreto, Karina Garcia, Bernardo Franco, José A Martínez-Álvarez, Carol A Munro, Neil A R Gow
Sporotrichosis is a subcutaneous mycosis caused by pathogenic species of the Sporothrix genus. A new emerging species, Sporothrix brasiliensis, is related to cat-transmitted sporotrichosis and has severe clinical manifestations. The cell wall of pathogenic fungi is a unique structure and impacts directly on the host immune response. We reveal and compare the cell wall structures of Sporothrix schenckii and S. brasiliensis using high-pressure freezing electron microscopy to study the cell wall organization of both species...
March 9, 2018: PLoS Neglected Tropical Diseases
José Roberto Fogaça de Almeida, Grasielle Pereira Jannuzzi, Gilberto Hideo Kaihami, Leandro Carvalho Dantas Breda, Karen Spadari Ferreira, Sandro Rogério de Almeida
Sporothrix brasiliensis is the most virulent fungus of the Sporothrix complex and is the main species recovered in the sporotrichosis zoonotic hyperendemic area in Rio de Janeiro. A vaccine against S. brasiliensis could improve the current sporotrichosis situation. Here, we show 3 peptides from S. brasiliensis immunogenic proteins that have a higher likelihood for engaging MHC-class II molecules. We investigated the efficiency of the peptides as vaccines for preventing subcutaneous sporotrichosis. In this study, we observed a decrease in lesion diameters in peptide-immunized mice, showing that the peptides could induce a protective immune response against subcutaneous sporotrichosis...
March 8, 2018: Scientific Reports
Luz A López-Ramírez, Nahúm V Hernández, Nancy E Lozoya-Pérez, Leila M Lopes-Bezerra, Héctor M Mora-Montes
Sporothrix schenckii is one of the causative agents of the deep-seated mycosis sporotrichosis, a fungal infection with worldwide distribution. Fungus-specific molecules and biosynthetic pathways are potential targets for the development of new antifungal drugs. The MNT1/KRE2 gene family is a group of genes that encode fungus-specific Golgi-resident mannosyltransferases that participate in the synthesis of O-linked and N-linked glycans. While this family is composed of five and nine members in Candida albicans and Saccharomyces cerevisiae, respectively, the S...
February 21, 2018: Research in Microbiology
Luana S M Forezi, Luana P Borba-Santos, Mariana F C Cardoso, Vitor F Ferreira, Sonia Rozental, Fernando De Carvalho Da Silva
Sporotrichosis is a serious public health problem in Brazil that affects human patients and domestic animals, mainly cats. Thus, the search for new antifungal agents is required also due to the emergence and to the lack of effective drugs available in the therapeutic arsenal. The aim of this study was to evaluate the in vitro antifungal profile of two synthetic series of coumarin derivatives against Sporothrix schenckii and Sporothrix brasiliensis. The three-components synthetic routes used for the preparation of coumarin derivatives have proved to be quite efficient and compounds 16 and 17 have been prepared in good yields...
February 20, 2018: Current Topics in Medicinal Chemistry
Yong He, Chelsea Ma, Maxwell Fung, Sarah Fitzmaurice
Sporotrichosis is a subcutaneous mycotic infection caused by Sporothrix schenckii, a group of common saprophytes of soil, plants, and organic debris. Disseminated forms may be seen in the setting of immunosuppression and are typically treated initially with intravenous lipidized amphotericin B. We report an unusual case of a 65-year-old woman who developed disseminated cutaneous sporotrichosis with extensive facial involvement in the absence of a known primary inoculation. Her cutaneous lesions completely resolved after treatment with intravenous posaconazole without amphotericin B...
July 15, 2017: Dermatology Online Journal
F N Morgado, L M V de Carvalho, J Leite-Silva, A J Seba, M I F Pimentel, A Fagundes, M F Madeira, M R Lyra, M M Oliveira, A O Schubach, F Conceição-Silva
The clinical presentations of skin diseases produced by different pathogens, as American tegumentary leishmaniasis (ATL) and sporotrichosis can be similar and possibly influenced by the skin immune system (SIS). The aim of the study was to understand the underlying mechanisms of skin inflammation produced by different pathogens. We used immunohistochemistry to analyze 96 patients: a- localized cutaneous leishmaniasis (LCL-ATL); b- sporotrichoid cutaneous leishmaniasis (SCL-ATL); c-lymphocutaneous (LC-SP); d- fixed (F-SP) sporotrichosis...
February 13, 2018: Scientific Reports
Jéssica Sepulveda Boechat, Manoel Marques Evangelista Oliveira, Rodrigo Almeida-Paes, Isabella Dib Ferreira Gremião, Ana Caroline de Sá Machado, Raquel de Vasconcelos Carvalhaes Oliveira, Anna Barreto Fernandes Figueiredo, Vanessa Brito de Souza Rabello, Karoline Benevides de Lima Silva, Rosely Maria Zancopé-Oliveira, Tânia Maria Pacheco Schubach, Sandro Antonio Pereira
BACKGROUND: Sporotrichosis is caused by species of the genus Sporothrix. From 1998 to 2015, 4,703 cats were diagnosed at the Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil. Even after the description of the Sporothrix species, the characterisation of feline isolates is not performed routinely. OBJECTIVES: To characterise the clinical isolates from cats at the species level and correlate them with the clinical and epidemiological characteristics of the cats...
March 2018: Memórias do Instituto Oswaldo Cruz
Lucia Rangel-Gamboa, Fernando Martinez-Hernandez, Pablo Maravilla, Ana Flisser
BACKGROUND: Sporotrichosis is a subcutaneous mycosis that is caused by diverse species of Sporothrix. High levels of genetic diversity in Sporothrix isolates have been reported, but few population genetics analyses have been documented. AIM: To analyze the genetic variability and population genetics relations of Sporothrix schenckii Mexican clinical isolates and to compare them with other reported isolates. METHODS: We studied the partial sequences of calmodulin and calcium/calmodulin-dependent kinase genes in 24 isolates; 22 from Mexico, one fromColombia, and one ATCC® 6331™ ; the latter was used as a positive control...
February 2, 2018: Mycoses
Krista N Larson, Shaily Pandey, William Hoover, Natalie Z Sun
No abstract text is available yet for this article.
January 2018: JAAD Case Reports
Min Chen, Yuan Xu, Nan Hong, Yali Yang, Wenzhi Lei, Lin Du, Jingjun Zhao, Xia Lei, Lin Xiong, Langqi Cai, Hui Xu, Weihua Pan, Wanqing Liao
With the increasing number of immunocompromised hosts, the epidemiological characteristics of fungal infections have undergone enormous changes worldwide, including in China. In this paper, we reviewed the existing data on mycosis across China to summarize available epidemiological profiles. We found that the general incidence of superficial fungal infections in China has been stable, but the incidence of tinea capitis has decreased and the transmission route has changed. By contrast, the overall incidence of invasive fungal infections has continued to rise...
February 2018: Frontiers of Medicine
Alexandro Bonifaz, Andrés Tirado-Sánchez
Sporotrichosis is an implantation or inoculation mycosis caused by species of Sporothrix schenckii complex; its main manifestations are limited to skin; however, cutaneous-disseminated, disseminated (visceral) and extracutaneous variants of sporotrichosis can be associated with immunosuppression, including HIV-AIDS, chronic alcoholism or more virulent strains. The most common extracutaneous form of sporotrichosis includes pulmonary, osteoarticular and meningeal. The laboratory diagnosis requires observing yeast forms and isolating the fungus; the two main causative agents are Sporothrix schenckii (ss) and Sporothrix brasiliensis...
February 10, 2017: Journal of Fungi (Basel, Switzerland)
Pãmella A Macêdo-Sales, Simone R L S Souto, Carolina A Destefani, Ricardo P Lucena, Ricardo Luiz D Machado, Marcia R Pinto, Anderson M Rodrigues, Leila M Lopes-Bezerra, Elisabeth M S Rocha, Andréa Regina S Baptista
BACKGROUND: Sporotrichosis is a neglected zoonosis caused by pathogenic fungi belonging to the Sporothrix schenckii complex. In Rio de Janeiro state, this disease reached an epidemic status with over 4700 domestic felines and around 4000 humans affected since the mid-90s. The present study evaluated clinical and epidemiological aspects and also the frequency of colonization and infection by these fungi in healthy cats and among those with suspicious cutaneous lesions, inhabiting four Rio de Janeiro state distinct areas...
January 18, 2018: BMC Veterinary Research
Ana Maria Benvegnú, Juliana Stramari, Lia Natália Diehl Dallazem, Raíssa Massaia Londero Chemello, André Avelino Costa Beber
Sporotrichosis is the most prevalent subcutaneous mycosis and is characterized by a subacute or chronic development of a cutaneous or subcutaneous nodular lesion. It is caused by the dimorphic fungus Sporothrix spp, which may manifest in different clinical forms. The disseminated cutaneous form is uncommon and is more likely to occur in immunocompromised patients. We report a 47-year-old male patient with multiple cutaneous and subcutaneous nodules. The patient was diagnosed with disseminated cutaneous sporotrichosis based on the isolation and identification of Sporothrix spp...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
João Paulo M Yamagata, Fabiana B Rudolph, Maria Clara L Nobre, Leninha V Nascimento, Felipe Maurício S Sampaio, Andrea Arinelli, Dayvison F Freitas
Purpose: Sporotrichosis is a subcutaneous mycosis caused by Sporothrix sp., a dimorphic fungus. Although the cutaneous form is the most frequent form, the ocular presentation has been increasingly diagnosed in epidemic areas. We describe three cases of ocular sporotrichosis with the involvement of the ocular adnexa due to autoinoculation without trauma with successful antifungal treatment. Observations: Patient 1: A 68-year-old woman presented with granulomatous conjunctivitis of the right eye with an ulcerated nodule on the right temporal region for 5 months...
December 2017: American Journal of Ophthalmology Case Reports
Paula Gonçalves Viana, Anna Barreto Fernandes Figueiredo, Isabella Dib Ferreira Gremião, Luisa Helena Monteiro de Miranda, Isabela Maria da Silva Antonio, Jéssica Sepulveda Boechat, Ana Caroline de Sá Machado, Manoel Marques Evangelista de Oliveira, Sandro Antonio Pereira
Sporotrichosis occurs worldwide, and the metropolitan region of Rio de Janeiro, Brazil, is a main endemic area, with a large number of human and animal cases in the last 19 years. This mycosis is more frequently described in cats rather than in dogs. There are a limited number of oral antifungal agents for the treatment of sporotrichosis in animals. In this context, the effectiveness of terbinafine in the treatment of sporotrichosis in humans, as well as the promising results of in vitro susceptibility tests, inspired us to use this drug in the therapy of this mycosis in dogs...
April 2018: Mycopathologia
Myrna Sabanero López, Lérida L Flores Villavicencio, Karla Soto Arredondo, Gloria Barbosa Sabanero, Julio César Villagómez-Castro, Gustavo Cruz Jiménez, Gerardo Sandoval Bernal, Haydee Torres Guerrero
BACKGROUND: Sporotrichosis is a fungal infection caused by the Sporothrix schenckii complex. The adhesion of the fungus to the host tissue has been considered the key step in the colonization and invasion, but little is known about the early events in the host-parasite interaction. AIMS: To evaluate the proteolytic activity of S. schenckii on epithelial cells. METHODS: The proteolytic system (at pH 5 and 7) was evaluated using azocoll and zymograms...
January 2018: Revista Iberoamericana de Micología
Pooja Arora, M Raihan, Asha Kubba, Ram K Gautam
Sporotrichosis is a subcutaneous mycotic infection caused by Sporothrix schenckii that is acquired by traumatic implantation. The diagnosis is established by demonstration of fungal elements on histopathology and culture. Potassium iodide, azole antifungals, and terbinafine are the treatment options available. In this article, we report a 60-year-old female with lymphocutaneous sporotrichosis that responded well to potassium iodide. However, subclinical hypothyroidism (Wolff-Chaikoff effect) was encountered as a side effect of therapy which was managed with thyroxine replacement...
November 2017: Indian Dermatology Online Journal
Rodrigo Vettorato, Daiane Heidrich, Fernanda Fraga, Amanda Carvalho Ribeiro, Danielle Machado Pagani, Carina Timotheo, Tais Guarienti Amaro, Gerson Vettorato, Maria Lúcia Scroferneker
We report a case of a patient with lymphocutaneous sporotrichosis in the right upper limb. The fungus was identified as Sporothrix schenckii senso stricto by calmodulin gene sequencing. The initial treatment was itraconazole (200 mg/day), but in vitro antifungal susceptibility demonstrated high resistant to this and another six antifungals, with exception to terbinafine. The lesions did not regress with itraconazole treatment. Thus, 500 mg/day of terbinafine was prescribed and clinical cure was obtained after four months...
March 2018: Medical Mycology Case Reports
Rosane Orofino-Costa, Priscila Marques de Macedo, Anderson Messias Rodrigues, Andréa Reis Bernardes-Engemann
In the late 90's there was a change in both the route of transmission and the people at risk for sporotrichosis. This zoonotic cat-man alternative transmission route elicited changes in strategies to control the epidemic. There was a progressive increase in the number of cases involving especially children and the elderly. In addition to becoming hyperendemic, uncommon clinical pictures like immunoreactive clinical presentations or severe systemic cases have emerged. New species were identified and classified through molecular tools using more virulent clinical isolates, like S...
September 2017: Anais Brasileiros de Dermatologia
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