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ABSTRACT: Sporotrichosis is a subcutaneous mycosis, which affects mainly small animals, and is considered an important public health disease. This paper describes the epidemiological and laboratory characteristics of 103 clinical cases of sporotrichosis diagnosed over a 10-year period in southern Brazil. The 92 cats and 11 dogs from eight municipalities in Rio Grande do Sul State developed especially the disseminated cutaneous and fixed cutaneous forms of the disease. Respiratory signs such as sneezing, serous nasal discharge and dyspnea were found in about 57% of the animals. The detection of Sporothrix schenckii in different clinical samples showed highest isolation in testicles (46.6%), oral cavity (45.2%) and conjunctival mucosa (38.1%). A differentiated histological pattern was found between the fixed cutaneous and disseminated cutaneous (DC) manifestations of the disease; well-organized granulomas of nodular distribution and various fungal structures prevailed in the DC form in cats. Melanin detection in S. schenckii cells by the Fontana-Masson technique was positive in 45.4% of the samples. The study revealed that the State of Rio Grande do Sul is an endemic sporotrichosis area and demonstrated the possibility of involvement of other pathways in the infection and spread of the disease. In addition, it emphasized the importance of laboratory tests for mycosis confirmation, especially in dogs that develop clinical manifestations without the presence of cutaneous lesions.
Mycopathologia 12/2011; 173(4):265-73. · 1.65 Impact Factor
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ABSTRACT: The close contact between dogs and humans poses a high risk of exposure to Toxocara canis eggs, which can lead to Visceral Larva Migrans (VLM) syndrome. The objective of this study was to investigate the existence of these nematode eggs on the hair of the perianal region in stray and owned dogs. Samples of hair from 104 dogs of different ages were collected: 25 (24%) were positive for T. canis eggs, with mean of 614.8 eggs per gram of hair. Puppies were responsible for 99% of the total number of eggs. The ages of the animal and hair length were factors that influenced the intensity of the observed eggs. This study showed that dog hair contaminated by T. canis eggs in different developmental stages represents a potential source of VLM infection for humans.
Veterinary Parasitology 11/2010; 174(1-2):115-8. · 2.58 Impact Factor
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ABSTRACT: Cryptococcus neoformans is an encapsulated yeast and is the etiological agent for human and animal cryptococcosis. It is found in sources within the environment, including pigeon excrement, and is an important cause of mortality among immunocompromised individuals worldwide.
Seventy different environments in the city of Pelotas, Rio Grande do Sul, were surveyed for the purpose of investigating Cryptococcus neoformans occurrences in pigeon excreta. The environments included buildings, public squares and outdoor locations in the city. After collection, chloramphenicol saline solution was added to the excreta, which were then homogenized and seeded onto Sabouraud agar with chloramphenicol and onto Niger agar, and incubated at 32 degrees C. Identification was performed by direct examination and by means of the phenoloxidase and urease tests, carbohydrate assimilation and culturing in CGB medium.
Out of the sites investigated (n = 70), 26 (37.1%) of them contained pigeon excreta. These included historical buildings (n = 8), a church tower (n = 1), rice mills and warehouses (n = 7), a public square (n = 1) and outdoor locations (n = 9). Cryptococcus neoformans was isolated from 26.9% (n = 7/26) of these locations.
This study draws attention to isolation of this fungus in urban areas that present large accumulations of pigeon excrement. This represents a risk to public health, especially for immunocompromised individuals.
Revista da Sociedade Brasileira de Medicina Tropical 04/2010; 43(2):198-200. · 0.68 Impact Factor
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ABSTRACT: Dermatophytic pseudomycetoma is a subcutaneous fungal infection by Microsporum canis.
This work describes a case of dermatophytic pseudomycetoma in a Persian cat.
A 3-year old female Persian cat showing alopecia, scaling and ulcerated nodules throughout the body, with presence of ulcerated nodules with yellow granular discharges on the dorsum, close to the tail. Mycological and histopathological examinations were realized.
Diagnosis of dermatophytic pseudomycetoma was established. The cat was treated with griseofulvin, and surgical excision was carried out. Response to therapy was effective during the first months, during which a reduction in nodule frequency was observed. However, despite maintaining the therapy levels, the lesions relapsed and progressed to the point of causing the animal's death.
The clinic evolution showed the progressive and recurrent character of dermatophytic pseudomycetoma.
Revista Iberoamericana de Micología 03/2010; 27(2):98-100. · 1.16 Impact Factor
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Ana Raquel Mano Meinerz,
Tatiana de Ávila Antunes,
Lorena Leonardo de Souza,
Patrícia da Silva Nascente,
Renata Osório de Faria,
Marlete Brum Cleff,
Fabiane Resende Gomes, Márcia de Oliveira Nobre,
Reischak Dilmara,
Luis Filipe Damé Schuch,
Mário Carlos Araújo Meireles
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ABSTRACT: Considering the importance of FeLV in the feline clinic, as well as the likely agent spread from a symptomatic or asymptomatic feline bearer, this work has as objective the study of the frequency of FeLV in felines residents in the cities of the Pelotas and Rio Grande, municipalities located in the south area of Brazil. For that, the blood of 120 semi-domiciled animals was collected for the detection of the retrovirus through the Indirect Immunofluorescence technique (IFA). FeLV was detected in 38,3% (46/120) of the studied animals, representing a larger frequency considering other studies accomplished in other areas of Brazil, what confirms the importance of FeLV in the studied region.KEY WORDS: FeLV, felines, immunofluorescence, retrovirus. Considerando a importância do VLFe na clínica felina, assim como a possível disseminação do agente a partir de um felino portador sintomático ou assintomático, o estudo tem como objetivo verificar a frequência de viremia pelo VLFe em felinos residentes em Pelotas e Rio Grande, municípios situados na região sul do Brasil. Para isso foi coletado sangue de 120 animais semidomiciliados para a detecção do retrovírus através da técnica de imunofluorescência indireta (IFI). Detectou-se a viremia em 38,3% (46/120) dos animais estudados, representando uma frequência maior em relação a outros estudos realizados no Brasil, o que confirma a importância deste agente na região estudada.PALAVRAS-CHAVES: Felinos, imunofluorescência, retrovírus, VLFe.
Ciência Animal Brasileira. 01/2010;
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ABSTRACT: The aim of this study was to evaluate the in vivo activity of itraconazole and terbinafine for treating experimental cutaneous sporotrichosis. Eighty Wistar rats were used, divided into four groups (TERB20, TERB30, ITRA and CONT). They were inoculated in the left plantar pad with 0.2 ml of solution containing 2x10(3) cell/ml of Sporothrix schenckii and treated with terbinafine (20 and 30 mg/kg), itraconazole (10 mg/kg) or placebo for 13 weeks. The lesions at the inoculation site were evaluated and measured weekly, along with their dissemination. Mycological and histopathological analyses were performed subsequently. The results showed that the animals in the ITRA group differed statistically in all parameters evaluated, in relation to CONT. For terbinafine, there were no statistical differences between the treated and control groups. It could be confirmed that itraconazole presented good activity for treating sporotrichosis, while terbinafine was ineffective for this disease at the doses used. However, more studies on the latter antifungal agent are needed.
Revista da Sociedade Brasileira de Medicina Tropical 12/2009; 42(6):706-10. · 0.68 Impact Factor
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ABSTRACT: In this study, we evaluate the clinical, histopathological and ultra structural aspects of the infection by field strain (MEL(+)) and mutated strain (MEL(-)) of Sporothrix schenckii. The development of sporotrichosis at the inoculation sites was similar for both groups of animals after the second week of the experimental period. Statistical differences appeared only at weeks 3 and 5. The pigmented isolate had greater tissue invasive capacity, promoting the formation of multifocal granulomas, whereas the albino isolate induced an enhanced inflammatory response, restraining the agent to the core of the granulomas.
Microbes and Infection 10/2009; 12(2):162-5. · 3.10 Impact Factor
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Ana Raquel Mano Meinerz,
Patrícia da Silva Nascente,
Luiz Filipe Damé Schuch,
Renata Osório de Faria,
Santin Rosema,
Marlete Brum Cleff,
Isabel Martins Madrid,
Anelise Afonso Martins, Márcia de Oliveira Nobre,
Mário Cardoso Araújo Meireles,
João Roberto de Braga Mello
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ABSTRACT: o felino doméstico com esporotricose representa um papel importante na transmissão do S. schenckii a ou-tros animais e para o homem sendo crescente o aumento do número de casos zoonóticos da micose. o estudo des-creve três casos de esporotricose em gatos semidomicilia-dos, convivendo no mesmo bairro. os felinos apresenta-ram lesões cutâneas ulceradas e crostosas, sendo realizada a confirmação do diagnóstico após a análise micológica com o isolamento do S. schenckii. o estudo ressalta a im-portância dos felinos domésticos como propagadores da esporotricose para animais e para o homem.PALAVRAS-CHAVE: Esporotricose, zoonose, felino, Sporothrix schenckii. the domestic feline with sporotrichosis represents an important role in the transmission of the S. schenckii schenckii to other animal species and for the man being growing the increase of the number of zoonotic cases of the mycosis. the study reports three cases of feline sporo-trichosis in semi-domiciled cats, living together in the same neighborhood. the feline presented cutaneous ulcerated and crusted injuries being accomplished the confirmation of the diagnosis after the analysis micológica with the isolation of S. schenckii. the study emphasizes the importance of the domestic feline as diffuser of the sporotrichosis for other animals and for the man itself.KEY-WORDS: feline, sporotrichosis, zoonosis, Sporothrix schenckii.
Ciência Animal Brasileira. 01/2007;
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ABSTRACT: Sporotrichosis is a chronic subcutaneous mycosis caused by Sporothrix schenckii. This work aimed to evaluate the virulence of two different isolates of S. schenckii from cutaneous (CUT) and systemic (SYS) forms of feline sporotrichosis. A standard inoculum with 2 x 10(3) yeast cells/ml was prepared from each of the isolates. The experimental infection was carried out with 0.1 ml of the inoculum from both isolates and then injected in the paw pads of Swiss albino mice of groups CUT and SYS. The clinical evolution of the disease and the diameter of the lesion at the inoculated sites were evaluated during nine weeks. Four necropsies were done to collect material from the lesions (p < 0.01). Group CUT demonstrated a more evident clinical evolution of the disease from week two to week five; large lesions in the paw pad on week four (p < 0.01); and a higher incidence of lesions in other parts of the body (p < 0.01) than group SYS (p < 0.01). S. schenckii was isolated from the inoculated site in groups SYS and CUT until days 30 and 45, respectively. Granulomas with yeast cells usually localized in the central area were observed in histopathology sections on days 15 and 30 post-inoculations. Those yeast cells decreased on day 45 being absent on day 62 when tissue repair initiated. The results showed that distinct clinical isolates of S. schenckii cause significant differences in the clinical evolution of sporotrichosis.
Mycopathologia 09/2005; 160(1):43-9. · 1.65 Impact Factor
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ABSTRACT: The study objective was to determine the in vitro activity of terbinafine and itraconazole through the microdilution technique in broth (NCCLSM27-A2), adapted for dimorphic fungus, in relation to 12 isolates of Sporothrix schenckii. Six were from feline sporotrichosis, three from human sporotrichosis, one from a dog and two from human isolates originating from Instituto Oswaldo Cruz. The inoculum and antifungal concentrates were distributed on microplates that were incubated at 35 degrees C for five days. Minimum inhibitory concentration readings were made at the end of this period. The MIC for terbinafine ranged from 0.055 microg/ml to 0.109 microg/ml, and the MIC for itraconazole ranged from 0.219 microg/ml to 1.75 microg/ml. For both drugs, the MIC from the isolates from IOC was 0.875 microg/ml. The present study demonstrates the high susceptibility of Sporothrix schenckii to terbinafine. Further studies to correlate the in vitro susceptibility tests with the clinical response of patients with sporotrichosis are needed.
Revista da Sociedade Brasileira de Medicina Tropical 40(1):60-2. · 0.68 Impact Factor
