The aim of this study was evaluate the in vitro antifungal activity of crude extracts from Eugenia uniflora, Libidibia ferrea and Psidium guajava. The extracts were obtained by turbo-extraction using water (AQ) or acetone-water (AC-W) (7:3, v/v) as solvents and lyophilized to obtain the crude extracts (CE). The CE were characterized by UV-Vis, TLC and HPLC. The activity of CEs was investigated against clinical isolates of Candida spp. and the Minimum Inhibitory Concentration (MIC), MIC50 and MIC90 were determinated. The analysis by TLC showed that all CEs presented polyphenols (flavonoids and tannins). The CEs from E. uniflora showed higher amount of polyphenols (30.35 ± 2.15%, AC-W) and the HPLC analysis revealed the tannins in all extracts. The CEs of E. uniflora showed MIC range from 1.9 to 500.0 µg/mL, and lower values of MIC50 and MIC90 against non-albicans Candida isolates. Regarding L. ferrea and P. guajava, the results showing MIC from 3.9 to 1000.0 µg/mL (CE-AQ) against C. albicans. The results demonstrate antifungal performance from CE against various species of Candida spp., suggesting that the herbal species may be use as new potential antifungal agents. Additionally, the polyphenol content can play a pivotal role in the antifungal properties of CE.

ABSTRACT Vulvovaginal candidiasis (VVC) in HIV-infected (HIV+) women is a serious public health problem. However, little is known about the virulence mechanisms of vaginal Candida albicans from HIV+ women in the post-highly active antiretroviral therapy (HAART) era. Here, we report a comparative analysis of the expression of key virulence factors and genetic variability of 26 vaginal C. albicans strains isolated from HIV+ women undergoing HAART and 18 from HIV-uninfected (HIV-) women. In general, we observed that C. albicans from HIV+ women receiving HAART showed lower expression of virulence factors compared with C. albicans from HIV- women, except for the proteinase activity which is highly expressed. The results in HIV-women further suggest that virulence factors appear to be expressed in response to the yeast stress, in the presence of an adequate immune response. Furthermore, the RAPD results showed a high heterogeneity among isolates from both groups of women. These findings in HIV+ women using HAART will help to improve the monitoring of vaginal yeast infections and the quality of life of patients.

Trichophyton rubrum and Trichophyton mentagrophytes complex, or Trichophyton spp. are the main etiologic agents of dermatophytosis, whose treatment is limited by the high cost of antifungal treatments, their various side effects, and the emergence of resistance amongst these species. This study evaluated the in vitro antidermatophytic activity of 23 crude extracts from nine plant species of semiarid vegetation (caatinga) found in Brazil. The extracts were tested at concentrations ranging from 1.95 to 1,000.0 mg/mL by broth microdilution assay against the reference strains T. rubrum ATCC 28189 and T. mentagrophytesATCC 11481, and 33 clinical isolates of dermatophytes. All plants showed a fungicidal effect against both fungal species, with MIC/MFC values of the active extracts ranging from 15.6 to 250.0 µg/mL. Selected extracts of Eugenia uniflora (AcE), Libidibia ferrea (AE), and Persea americana (AcE) also exhibited a fungicidal effect against all clinical isolates of T. rubrum and T. mentagrophytes complex. This is the first report of the antifungal activity of Schinus terebinthifolius, Piptadenia colubrina, Parapiptadenia rigida, Mimosa ophthalmocentra, and Persea americana against both dermatophyte species.

Candida albicans is an opportunistic human pathogen that is capable of causing superficial and systemic infections in immunocompromised patients. Extracts of Sapindus saponaria have been used as antimicrobial agents against various organisms. In the present study, we used a combination of two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) to identify the changes in protein abundance of C. albicans after exposure to the minimal inhibitory concentration (MIC) and sub-minimal inhibitory concentration (sub-MIC) of the butanolic extract (BUTE) of S. saponaria and also to fluconazole. A total of six different proteins with greater than 1.5 fold induction or repression relative to the untreated control cells were identified among the three treatments. In general, proteins/enzymes involved with the glycolysis (GPM1, ENO1, FBA1), amino acid metabolism (ILV5, PDC11) and protein synthesis (ASC1) pathways were detected. In conclusion, our findings reveal antifungal-induced changes in protein abundance of C. albicans. By using the previously identified components of the BUTE of S. saponaria (e.g., saponins and sesquiterpene oligoglycosides), it will be possible to compare the behavior of compounds with unknown mechanisms of action, and this knowledge will help to focus the subsequent biochemical work aimed at defining the effects of these compounds.

A dermatofitose é uma zoonose comum nos centros urbanos. Cães e gatos têm desempenhado um papel importante como seus disseminadores. A descontaminação ambiental é essencial para a prevenção da propagação da infecção em seres humanos e animais. No entanto, desinfetantes ou sanitizantes com atividade antifúngica que estão disponíveis atualmente têm alta toxicidade. O presente estudo avaliou os efeitos in vitro de um extrato de Cymbopogon nardus (citronela) em 31 Microsporum canis isolados de animais e meio ambiente doméstico. Os testes de susceptibilidade foram realizados com base no documento M38-A2 (2008) do Clinical and Laboratory Standards Institute com modificações para os produtos naturais. Embora tenha sido observada variação de susceptibilidade entre os fungos testados, as concentrações que inibiram o crescimento de 50% e 90% dos microrganismos foram baixas (19,5 e 78 µg/mL, respectivamente). Assim, o extrato de citronela mostrou potente atividade fungistática e fungicida contra M. canis isolados de animais e meio ambiente doméstico. Portanto, este extrato pode ser uma alternativa para a profilaxia da dermatofitose no ambiente doméstico.

Dermatophytosis is a common zoonosis in urban centers. Dogs and cats have played an important role as its disseminators. Environmental decontamination is essential for the prevention of its propagation to humans and animals. However, sanitizers or disinfectants with antifungal activity, currently available, have high toxicity. The present study evaluated the in vitro effects of an extract of citronella (Cymbopogon nardus) on 31 Microsporum canis isolates from animals and home environments. Susceptibility tests were performed based on document M38-A2 (2008) of the Clinical and Laboratory Standards Institute with modifications for natural products. Although susceptibility variation was observed between the fungus tested, the concentrations that inhibited the growth of 50 and 90% of the microorganisms were low (19.5 and 78 µg/mL, respectively). Thus, this citronella extract showed potent fungistatic and fungicide activities against M. canis isolated from animals and home environments. Therefore, it could be an alternative for dermatophytosis prophylaxis in the home environment.

Candidíase vulvovaginal (CVV) em mulheres infectadas pelo HIV contribuiu substancialmente para a diminuição da sua qualidade de vida. O objetivo deste estudo foi avaliar o efeito do uso de terapia anti-retroviral altamente ativa (HAART) no isolamento de Candida spp. vaginais em mulheres HIV positivas comparado às não infectadas por HIV. Este estudo transversal incluiu 178 mulheres infectadas pelo HIV (grupo HIV) e 200 mulheres não infectadas (grupo controle) acompanhadas no Serviço de Assistência Especializada (SAE) para as doenças sexualmente transmissíveis (DST)/AIDS da cidade de Maringá/Brasil, de 1 abril a 30 de outubro de 2011. As leveduras foram isoladas e identificadas por métodos fenotípicos e moleculares. A susceptibilidade in vitro aos antifúngicos fluconazol, itraconazol, nistatina e anfotericina B foi avaliada pelo método de referência de microdiluição. Nós encontramos maior frequência de isolamento vaginal total de Candida spp. no grupo HIV do que no grupo controle. Entretanto, foi observada frequência similar de colonização e CVV entre os dois grupos. Apesar de C. albicans ser a mais frequente e sensível a azólicos e polienos em mulheres infectadas pelo HIV e não infectadas, foi detectada emergente resistência de C. glabrata a AMB nas mulheres infectadas pelo HIV. Embora tenha sido observada maior frequência de isolamento vaginal de Candida spp. nas mulheres infectadas pelo HIV do que nas não infectadas, colonização e CVV apresentaram frequência similar em ambos os grupos, o que indica que HAART parece proteger contra colonização vaginal e CVV.

 Vulvovaginal candidiasis (VVC) in HIV-infected women contributed to the impairment of their quality of life. The aim of this study was to evaluate the effect of highly active antiretroviral therapy (HAART) use on the vaginal Candida spp. isolation in HIV-infected compared to HIV-uninfected women. This cross-sectional study included 178 HIV-infected (HIV group) and 200 HIV-uninfected women (control) that were studied at the Specialized Assistance Service (SAE) for sexually transmitted diseases (STD)/AIDS of the city of Maringá, Brazil, from April 1 to October 30, 2011. The yeasts were isolated and identified by phenotypic and molecular methods. The in vitro antifungal susceptibility to fluconazole, itraconazole, nystatin and amphotericin B was tested by the reference microdilution method. Higher frequencies of total vaginal Candida spp. isolation were found in the HIV-infected group than in the control group. However, both groups showed a similar frequency of colonization and VVC. Although C. albicans was the most frequent and sensitive to azolics and polyenes in both HIV-infected and uninfected women, the emerging resistance of C. glabrata to amphotericin B in the HIV-infected women was observed. Although higher frequency of vaginal Candida spp. isolation had been observed in the HIV-infected than in HIV-uninfected women, colonization and VVC showed similar frequency in both groups, indicating that HAART appears to protect against vaginal colonization and VVC.

O uso de cateter venoso central (CVC) e antibióticos de amplo espectro estão entre os principais fatores de risco para o desenvolvimento da candidemia em pacientes internados em unidades de terapia intensiva (UTI). É conhecido que alguns antibióticos aumentam a resistência das leveduras aos antifúngicos azólicos. Assim, o objetivo deste estudo foi avaliar se leveduras presentes em colonização de CVC expostas a antibióticos que atuam em parede celular se beneficiam de uma redução na suscetibilidade ao fluconazol e voriconazol e se obtêm maior capacidade de formar biofilme. Candida albicans, C. tropicalis, C. glabrata,C. parapsilosis e C. guilhermondii foram semeadas em placas de Mueller-Hinton Agar, com gradientes de antibióticos (cefepima, meropenem, vancomicina e piperacilina-tazobactam). A suscetibilidade e a formação de biofilme das leveduras foram testadas antes e após a exposição aos antibióticos. Nenhum dos antibióticos provocou alterações detectáveis in vitro sobre a suscetibilidade das leveduras aos antifúngicos ou à capacidade de formar biofilme. Estes resultados sugerem que o aumento da candidemia na UTI não seria atribuído a possíveis alterações provocadas nas leveduras e sim pelo enfraquecimento da condição geral do paciente após longa exposição à infecção.

The use of central venous catheters (CVC) and broad-spectrum antibacterials are among the main risk factors for the development of candidemia in patients admitted to intensive care units (ICU). It is known that some antibacterials increase the resistance of these yeasts to azole antifungals. Thus, the aim of this research was to determine whether yeast present in CVC colonizations previously exposed to cell-wall targeted antibacterials benefit from a reduction in susceptibility to fluconazole and voriconazole, facilitating their ability to form biofilms. Candida albicans, C. tropicalis, C. glabrata, C. parapsilosis and C. guilhermondii were seeded into antibacterial (cefepime, meropenem, vancomycin, and piperacillin-tazobactam) gradient plates produced in Mueller-Hinton Agar. The susceptibility to fluconazole and voriconazole and the biofilm formation of the yeasts were tested before and after exposure to the antibacterials. None of the antibacterials exerted a significant effect on the in vitro susceptibility of the yeasts to the antifungal agents or on their ability to form biofilms. These results suggest that increased candidemia in ICU patients is not attributable to possible alterations in the yeasts, but is more likely caused by a weakening of the patient's general condition after long exposure to infection.

CONTEXTO E OBJETIVO: Candidíase vulvovaginal (CVV) é causada pelo crescimento anormal de fungos do tipo leveduras na mucosa do trato genital feminino. Pacientes com diabetes mellitus (DM) são mais susceptíveis a infecções fúngicas, incluindo por espécies de Candida. O presente estudo investigou a frequência de isolamento total de Candida spp. vaginal, e diferentes quadros clínicos (CVV e CVV recorrente- CVVR) em mulheres com DM tipo 2 comparadas às não diabéticas. A razão de cura do tratamento com fluconazol também foi avaliada. TIPO DE ESTUDO E LOCAL: Estudo transversal realizado no sistema público de saúde de Maringá, Paraná, Brazil. MÉTODO: O estudo envolveu 717 mulheres de 17-74 anos de idade e, destas, 48 (6,7%) tinham DM 2 (média de 53,7 anos), independentemente de sinais e sintomas de CVV. As leveduras foram isoladas e identificadas por métodos fenotípicos clássicos. RESULTADOS: No grupo de não diabéticas (controle), leveduras vaginais totais foram isoladas em 79 (11,8%) mulheres, e no grupo de diabéticas, em 9 (18,8%) (P = 0,000). O grupo de diabéticas mostrou mais mulheres sintomáticas (CVV + CVVR = 66,66%) do que colonizadas (33.33%), e significativamente mais colonização, CVV e CVVR, que as controle. A razão média de cura com fluconazol foi de 75.0% no grupo diabéticas e 86.7% no controle (P = 0.51). CONCLUSÃO: Nós encontramos que DM 2 em mulheres brasileiras associou-se com colonização vaginal por leveduras, CVV e CVVR, razão similar de isolamento de C. albicans e espécies não albicans. Boa taxa de cura foi obtida com fluconazol em ambos os grupos.

CONTEXT AND OBJECTIVE: Vulvovaginal candidiasis (VVC) is caused by abnormal growth of yeast-like fungi on the female genital tract mucosa. Patients with diabetes mellitus (DM) are more susceptible to fungal infections, including those caused by species of Candida. The present study investigated the frequency of total isolation of vaginal Candida spp., and its different clinical profiles - colonization, VVC and recurrent VVC (RVVC) - in women with DM type 2, compared with non-diabetic women. The cure rate using fluconazole treatment was also evaluated. DESIGN AND SETTING: Cross-sectional study conducted in the public healthcare system of Maringá, Paraná, Brazil. METHODS: The study involved 717 women aged 17-74 years, of whom 48 (6.7%) had DM type 2 (mean age: 53.7 years), regardless of signs and symptoms of VVC. The yeasts were isolated and identified using classical phenotypic methods. RESULTS: In the non-diabetic group (controls), total vaginal yeast isolation occurred in 79 (11.8%) women, and in the diabetic group in 9 (18.8%) (P = 0.000). The diabetic group showed more symptomatic (VVC + RVVC = 66.66%) than colonized (33.33%) women, and showed significantly more colonization, VVC and RVVC than seen among the controls. The mean cure rate using fluconazole was 75.0% in the diabetic group and 86.7% in the control group (P = 0.51). CONCLUSION: We found that DM type 2 in Brazilian women was associated with yeast colonization, VVC and RVVC, and similar isolation rates for C. albicans and non-albicans species. Good cure rates were obtained using fluconazole in both groups.

RESUMOIntrodução: A maioria das infecções fúngicas hospitalares são causadas por Candida spp. e C. albicans é a espécie mais comumente identificada. Métodos moleculares são ferramentas importantes para a avaliação da origem das leveduras isoladas em hospitais.Métodos: Este é um estudo sobre o perfil genético de 39 isolados clínicos nosocomiais de C. albicans através das técnicas de RAPD e microssatélite, foram usados dois diferentes iniciadores para cada técnica.Resultados: RAPD forneceu 10 e 11 diferentes perfis com valores de SAB 0,84 ± 0,126 e 0,88 ± 0,08 para os primers M2 e P4, respectivamente. A análise de microssatélites, usando os marcadores CDC3 e HIS3 permitiu a observação de seis e sete diferentes alelos respectivamente, com poder discriminatório combinado de 0,91.Conclusões: Embora seja clara a variabilidade genética, foi possível identificar alta similaridade, sugerindo origem comum para pelo menos parte deles. É importante enfatizar que foi comprovada origem comum de leveduras isoladas de colonização (urina, cateter ou secreção orotraqueal) e hemocultura do mesmo paciente, indicando que a candidemia deve ter iniciado a partir de um sítio de colonização. A combinação das técnicas RAPD e microssatélites fornece uma análise rápida e eficiente para investigação de similaridade entre isolados nosocomiais de C. albicans.

SUMMARYIntroduction: The majority of nosocomial fungal infections are caused by Candida spp. where C. albicans is the species most commonly identified. Molecular methods are important tools for assessing the origin of the yeasts isolated in hospitals.Methods: This is a study on the genetic profifiles of 39 nosocomial clinical isolates of C. albicans using two typing methods: random amplifified polymorphic DNA (RAPD) and microsatellite, two different primers for each technique were used.Results: RAPD provided 10 and 11 different profiles with values for SAB of 0.84 ± 0.126 and 0.88 ± 0.08 for primers M2 and P4, respectively. Microsatellite using two markers, CDC3 and HIS3, allowed the observation of six and seven different alleles, respectively, with combined discriminatory power of 0.91.Conclusions: Although genetic variability is clear, it was possible to identify high similarity, suggesting a common origin for at least a part of isolates. It is important to emphasize that common origin was proven from yeasts isolated from colonization (urine, catheter or endotracheal secretions) and blood culture from the same patient, indicating that the candidemia must have started from a site of colonization. The combination of RAPD and microsatellite provides a quick and efficient analysis for investigation of similarity among nosocomial isolates of C. albicans.

Introduction Hospital infections caused by Candida spp. are a leading cause of morbidity and mortality in hospitalized patients, particularly those that are critically ill or immunocompromised. In this study, the distribution of Candida species in isolates from the University Hospital of the Federal University at Grande Dourados and their in vitro susceptibility to antifungal drugs were analyzed. Methods Yeasts were phenotypically identified using classical methodologies. Antifungal susceptibility tests to amphotericin B and fluconazole were performed using the broth microdilution technique. Results A total of 50 Candida isolates were obtained from hospitalized patients during the study period. We analyzed yeast isolates from urine (n=31; 62%), blood (n=12; 24%), and tracheal secretions (n=7; 14%). The following Candida species were identified: C. tropicalis (n=21; 42%), C. albicans (n=18; 36%), C. glabrata (n=10; 20%), and C. krusei (n=1; 2%). Antifungal susceptibility tests demonstrated that C. albicans was susceptible to both antifungal agents. However, 31.2% of the non-C. albicans Candida isolates displayed dose-dependent susceptibility to fluconazole, and 3.1% were resistant to amphotericin B. Conclusions In contrast to previous reports, our results indicated that C. tropicalis was the most commonly isolated yeast species among the hospital patients. The predominance of non-C. albicans Candida infections confirms the importance of species-level identification for implementing appropriate antifungal therapies.

INTRODUÇÃO: No ambiente hospitalar, são frequentes as infecções por leveduras do gênero Candida spp., o que torna esse assunto um importante alvo de estudos. OBJETIVO: Avaliar o perfil de suscetibilidade aos antifúngicos de espécies de Candida de pacientes internados no Hospital Universitário Regional de Maringá-PR (HURM). MATERIAL E MÉTODOS: As amostras foram submetidas ao teste de microdiluição em caldo (MD), segundo o documento M27-A3 para determinação da concentração inibitória mínima (CIM), e ao teste de difusão em disco de acordo com o documento M44-A2, ambos do Clinical Laboratory Standarts Institute (CLSI). RESULTADOS E DISCUSSÃO: Foram obtidos 91 isolados provenientes de amostras de urina, hemocultura, ponta de cateter, secreção orotraqueal, entre outros, sendo 38 Candida albicans, 23 C. tropicalis, 16 C. gabrata, 10 C. parapsilosis e quatro C. krusei. Dos antifúngicos testados, anfotericina B, voriconazol e anidulafungina foram os mais eficazes. CONCLUSÃO: A comparação entre as metodologias de microdiluição em caldo e disco difusão (DD) mostrou boa correlação para fluconazol para a maioria das espécies de Candida spp., sendo possível destacar que a DD é útil para triagem dos principais antifúngicos usados na prática clínica. No entanto, casos de resistência detectados por DD devem ser confirmados por meio do método de MD, evitando, assim, resultados falsos resistentes, melhorando a eficácia e a segurança do tratamento.

INTRODUCTION: Due to the ubiquity of nosocomial yeast infections of the genus Candida spp., studies in this area have become increasingly relevant. OBJECTIVE: To evaluate the antifungal Candida spp. susceptibility profile of hospitalized patients from the Regional University Hospital of Maringá-PR (HURM). MATERIAL AND METHODS: The samples were submitted to broth microdilution test (MD) according to protocol M27-A3 in order to determine the minimum inhibitory concentration (MIC) and disk diffusion test according to protocol M44-A2, both from Clinical Laboratory Standards Institute (CLSI). RESULTS AND DISCUSSION: We obtained 91 isolates from urine samples, blood culture, catheter tip, endotracheal secretions, among others, from which 38 were Candida albicans, 23 were C. tropicalis, 16 were C. gabrata, 10 were C. parapsilosis, and four were C. krusei. Among the tested antifungal medications, amphotericin B, voriconazole and anidulafungin proved to be the most effective. CONCLUSION: In the comparison between broth microdilution and disk diffusion (DD) methods, fluconazole showed good correlation for most Candida spp., which corroborates the usefulness of DD in the screening of main antifungal agents used in clinical practice. Nonetheless, cases of resistance detected by DD need to be confirmed by MD method, which avoids false-resistant results and maximizes the treatment efficacy and reliability.

A terapia HAART (terapia antirretroviral altamente ativa) é usada em pacientes infectados pelo vírus da imunodeficiência humana (HIV) e demonstrou diminuição significativa de infecções oportunistas, tais como as causadas por vírus, fungos, protozoários e bactérias. O uso da HAART está associado com a reconstituição imunológica e diminuição na prevalência de candidíase oral. A terapia antirretroviral beneficia pacientes co-infectados pelo HIV, vírus herpes humano 8 (HHV-8), vírus Epstein-Barr (EBV), vírus da hepatite B (HBV), parvovírus B19 e citomegalovírus (CMV). A HAART também apresentou redução significativa da incidência e modificou as características da bacteremia por agentes etiológicos, tais como Staphylococcus aureus, espécies não-tifóides de Salmonella, Streptococcus pneumoniae, Pseudomonas aeruginosa, Mycobacterium tuberculosis. A HAART é capaz de modificar significativamente a história natural da criptosporidiose e microsporidiose. HAART pode efetivamente restaurar a imunidade da mucosa, levando à erradicação de Cryptosporidium parvum. Semelhante restauração da resposta imune ocorre em infecções por Toxoplasma gondii. O declínio na incidência de co-infecção leishmaniose visceral/HIV pode ser observada após a introdução da terapia com inibidores da protease. Os resultados atuais são altamente relevantes para a medicina clínica e podem proporcionar diminuição no número de prescrições medicamentosas e, consequentemente, melhor qualidade de vida para pacientes com doenças oportunistas.

Highly active antiretroviral therapy (HAART) is used in patients infected with HIV. This treatment has been shown to significantly decrease opportunist infections such as those caused by viruses, fungi and particularly, protozoa. The use of HAART in HIV-positive persons is associated with immune reconstitution as well as decreased prevalence of oral candidiasis and candidal carriage. Antiretroviral therapy benefits patients who are co-infected by the human immunodeficiency virus (HIV), human herpes virus 8 (HHV-8), Epstein-Barr virus, hepatitis B virus (HBV), parvovirus B19 and cytomegalovirus (CMV). HAART has also led to a significant reduction in the incidence, and the modification of characteristics, of bacteremia by etiological agents such as Staphylococcus aureus, coagulase negative staphylococcus, non-typhoid species of Salmonella, Streptococcus pneumoniae, Pseudomonas aeruginosa, and Mycobacterium tuberculosis. HAART can modify the natural history of cryptosporidiosis and microsporidiosis, and restore mucosal immunity, leading to the eradication of Cryptosporidium parvum. A similar restoration of immune response occurs in infections by Toxoplasma gondii. The decline in the incidence of visceral leishmaniasis/HIV co-infection can be observed after the introduction of protease inhibitor therapy. Current findings are highly relevant for clinical medicine and may serve to reduce the number of prescribed drugs thereby improving the quality of life of patients with opportunistic diseases.

Trichophyton tonsurans é um fungo dermatófito antropofílico de alta transmissibilidade que invade tecidos queratinizados. Relatamos um caso de microepidemia familiar causada por esse dermatófito no qual, apesar das ótimas condições de higiene, o fungo se manteve viável por vários anos, disseminando-se para todos os membros da família. A hipótese de que estivesse sendo mantido na residência da família foi confirmada após análise de amostras do domicílio, em que foram isoladas e identificadas culturas puras do fungo. Após o diagnóstico, a residência foi desinfetada e todos os membros da família receberam tratamento oral concomitantemente.

Trichophyton tonsurans is a highly transmissible anthropophilic dermatophyte fungus, which invades keratinized tissues. This study reports a case of family microepidemic caused by this dermato phyte. Despite their excellent hygiene conditions, it remained active for several years, spreading to all family members. The hypothesis that the fungus was being kept alive in the family home was confirmed after samples collected from it were analyzed. Pure cultures of the fungus were isolated and identified. After diagnosis, the house was disinfected with concomitant oral treatment for all family members.

Fungos oportunistas são aqueles que normalmente não causariam doenças em pessoas saudáveis, mas eles são capazes de causar problemas sob certas circunstâncias e, para isso, eles necessitam possuir algum potencial de virulência. O objetivo deste trabalho foi identificar amostras de fungos filamentosos isolados de granjas de aves em Cascavel, Paraná, e também avaliar o seu potencial de virulência, verificando a produção de proteinase, atividade hemolítica, produção de urease e crescimento a 37 ºC. Foram avaliados Acremonium hyalinulum (01), Aspergillus sp (12), Beauveria bassiana (01), Curvularia brachyspora (01), Paecylomices variotti (01) e Penicillium sp (02). Das 18 amostras, 44,4% apresentaram atividade proteolítica usando como substrato a albumina e 66,7% com caseína; 66,7% demonstraram atividade hemolítica, 83,3% foram uréia positivas e 88,9% cresceram em temperatura de 37 ºC. Os resultados demonstram que a maioria dos isolados expressaram fatores de virulência e, portanto, têm potencial para causar danos a hospedeiros humanos como os trabalhadores dos aviários, sobretudo em indivíduos predispostos ou suscetíveis.

Opportunistic fungi are those that normally would not cause diseases in otherwise healthy people, but are able to cause problems under some circumstances, and for this they need to possess a certain virulence potential. The objective of this study was to identify samples of filamentous fungi isolated from poultry barns in Cascavel, Paraná, and also to evaluate their virulence potential by assessing proteinase production, hemolytic activity, urease production, and growth rate at 37 ºC. We have evaluated the following samples: Acremonium hyalinulum (1 sample), Aspergillus sp. (12), Beauveria bassiana (1), Curvularia brachyspora (1), Paecilomyces variotti (1), and Penicillium sp. (2). Out of the 18 samples analyzed, 44.4% showed proteolytic activity using albumin as the substrate versus 66.7% when using casein; 66.7% showed hemolytic activity, 83.3% were positive for urea, and 88.9% grew at a temperature of 37 ºC. The results demonstrated that the majority of the isolates expressed virulence factors. Therefore, these isolates have the potential to harm human hosts, such as those working at poultry barns, especially predisposed or susceptible individuals.