Granulomatous mastitis due to coinfection with Histoplasma sp. and Paracoccidioides sp.: A case report.

A 51 years old female patient with granulomatous mastitis diagnosis, was referred to the Medical Mycology Department "Dr. Dante Borelli" at the Instituto de Medicina Tropical, Universidad Central de Venezuela (IMT-UCV). Mycological diagnosis demonstrated the presence of intracellular yeast structures suggesting Histoplasma sp. and also multi-budding structures compatible with Paracoccidioides sp. To the best of our knowledge, this is the first case report of a granulomatous mastitits due to coinfection of both fungi. 2012 Elsevier Ltd. All rights reserved.

Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates.

Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates. Paracoccidioidomycosis (PCM) is a progressive systemic mycosis caused by the fungus Paraccocidioides brasiliensis (Pb), endemic to Venezuela and Latin America. In this study, eight different Venezuelan isolates obtained from patients with PCM, were inoculated intraperitoneally in Syrian hamsters (Cricetus auratus) and studied by immune-serum. Each strain was collected by gently scraping the surface of the culture medium (Sabouraud Dextrose Agar) and suspended in 3 ml of 0.15 M phosphate-buffered saline. The antigen obtained was called Paraccocidioides brasiliensis Crude Antigen (CAP). Immunoblotting results showed that the immune-sera from hamsters recognized at least 3 bands: one over 200 kDa, and two of 80 and 15-20 kDa. This study suggests that IgG anti-CAP can reveal a significant variability in the eight Venezuelan isolates. Sera from 88 infected hamsters were evaluated by ELISA with eight different CAPs and Western blot with CAP 37383. ELISA results showed that, the antigen of the virulent isolate 37383 had the highest percentage (38%) of positivity, while the nonvirulent isolate 1458 had the lowest one (13.6%). Furthermore, scanning densitometry revealed that the isolate 37383 had less bands than the non-virulent isolates. These results suggest that the ELISA test with CAP 37383 can detect circulating antibodies, and that this virulent isolate may be useful for the diagnosis of PCM, and to monitor disease responses to treatments.

Histoplasmosis: a study of 158 cases in Venezuela, 2000-2005.

Histoplasmosis, a granulomatous disease caused by Histoplasma capsulatum, is endemic in Venezuela. We conducted the current study to appraise retrospectively the demographic data, clinical features, diagnostic methods, and treatment of patients with histoplasmosis from January 2000 to December 2005. We reviewed the medical records of outpatient cases with a diagnosis of histoplasmosis and considered clinical samples processed at our laboratory. We collected demographic, epidemiologic, and clinical data from each case as available, including results of any mycologic examinations performed. Treatment and outcome data were available for some patients. We assessed 158 cases of histoplasmosis: 103 (65.2%) patients came from the Caracas metropolitan area; 53 were associated with acquired immunodeficiency syndrome (AIDS), 14 with tuberculosis, and 8 with paracoccidioidomycosis. Six pediatric patients were malnourished. Epidemiologic data suggested histoplasmosis in most cases. Patients received treatment with itraconazole and/or amphotericin B. Our results may reflect changes in the epidemiology occurring in Venezuela, perhaps due to environmental changes and the presence of AIDS. Several mycologic exams are necessary to ensure a proper diagnosis. More reliable data and statistics on this infection are necessary to monitor outbreaks closely and to establish if there is an epidemic pattern.

Pulmonary histoplasmosis: unusual histopathologic findings.

Four patients with clinical diagnosis of interstitial lung disease (ILD) are presented. In these patients, lung biopsies revealed bronchocentric granulomatosis (BG), pulmonary alveolar proteinosis (PAP), diffuse alveolar damage (DAD), and in one biopsy, the clinical manifestations suggested tuberculous primo-infection with systemic dissemination. Three patients died without diagnosis. In all four cases, specific histological stains found Histoplasma capsulatum. Histoplasmosis may mimic other infectious or non-infectious pulmonary diseases, such as interstitial and granulomatous pulmonary disease. Therefore, the absolute need for identification of the organism by culture or special stains cannot be over-emphasized and may lead to a proper mycological diagnosis. This highlights the importance of differential diagnosis with systemic infectious diseases, especially in areas where deep-seated mycosis are endemic.

Nasal Septum Perforation Associated to Histoplasmosis: A Retrospective Study

Abstract Objective: To determine the prevalence of nasal septum perforation associated to Histoplasma sp. Material and Methods: A retrospective descriptive study was conducted with patients who developed nasal septum perforation associated to histoplasmosis. The diagnosis was made based on clinical manifestations and confirmed with mycological direct examination with Giemsa stain, culture, serologic tests (immunodiffusion method), and histopathology with hematoxylin-eosin, Grocott methenamine (GMS) and Periodic Acid-Schiff stain (PAS). Results: Out of 1654 medical records reviewed with diagnosis of histoplasmosis in the study period, we found 22 cases with nasal septum perforation. Autoimmune disease was present in 6 patients; all six were on immunosuppressive treatment. Two patients had HIV/AIDS, one of them had also paracoccidiodomycoses and the remaining had no apparent underlying disease or conditions. Conclusion: Physicians of endemic areas such as Venezuela, must consider this entity in the differential diagnosis with other diseases.

Aislamiento microbiológico en trabajadores de salud posterior a la higiene de manos

Introducción: La higiene de manos es un paso fundamental para prevenir la transmisión y diseminación de infecciones asociadas a la atención en salud (IAAS), por esto, es de vital importancia su correcta ejecución según los 5 momentos sugeridos por la Organización Mundial de la Salud (OMS). Objetivo: Aislar bacterias y hongos posterior a la higiene de las manos en el personal de salud. Métodos: Estudio descriptivo, experimental, transversal, con una muestra de 16 individuos que laboraban en el Servicio de Enfermedades Infecciosas del Adulto del Hospital Universitario de Caracas, divididos en dos grupos de 8 participantes, quienes realizaron la higiene de manos de acuerdo a las técnicas descritas por la Organización Mundial de la Salud con agua y jabón (grupo A) y con gel antibacterial a base de alcohol al 70 % (grupo B). Consecutivamente, se tomó muestra de las manos mediante aposición en placas de Petri, en Agar Endo (HiMedia™) y Agar Sabouraud (Oxoid™). Los crecimientos positivos fueron repicados a otros agares y se realizaron pruebas bioquímicas para su identificación. Resultados: En 56,25 % (9/16) de las muestras hubo crecimiento de levaduras, a partir de las cuales se identificaron C. parapsilosis (77,7 %), C. tropicalis (11,3 %) y C. kefyr (11,3 %). Por su parte, 50 % (8/16) tuvieron crecimiento positivo para bacilos Gram negativos fermentadores y no fermentadores. Conclusiones: En las manos de los trabajadores de salud se aislaron bacilos Gram negativos fermentadores y no fermentadores, así como especies de Candida. Se observó una mayor eficacia antimicrobiana con el uso de agua y jabón líquido con respecto a la eliminación de Candida spp.

Introduction: Hand washing is a key tool to prevent transmission and dissemination of hospital associated infections; thus it is a very important to elaborate the proper technique to achieve hand antisepsis, throughout several methods including the 5 times to hand washing proposed by World Health Organization (WHO). Aim: To isolate bacteria and fungi after handwashing in a group of healthcare personnel. Methods: This was an experimental, descriptive and cross-sectional study carried out with 16 healthcare personnel from the Adult Infectious Disease Department at the Hospital Universitario de Caracas, divided in 2 groups (A and B) of 8 participants who was asked and instructed to performed the handwashing technique stablished by the WHO. Group A used conventional soap and water, while group B used 70 % alcohol-based hand sanitizer. After hand sanitization with any of both substances, sample collection was performed throughout hand apposition in Petri dishes with Endo agar (HiMedia™) and Sabouraud dextrose agar with chloramphenicol (Oxoid™) and incubated during 36h in an aerobic 37 °C atmosphere. Positive growth in each case was replied and biochemical tests were performed to each isolation to confirm its identification. Results: 56.25 % (9/16) of the growth was represented by Candida sp: C. parapsilosis (77.7 %), C. tropicalis (11.33 %) and C. kefyr (11.3 %). About bacteria, 50 % (8/16) of the samples collected had growth for gram negative fermenting and nonfermenting bacilli. Conclusions: There were presence of gram-negative bacilli and fungi after handwashing in the hands of the healthcare personnel studied. It was observed that water and soap had a better antimicrobial outcome in comparison with alcohol-based sanitizer to eliminate Candida sp.

Case report: severe juvenile type paracoccidioidomycosis with hepatitis C.

We present the case of a 34-year-old man with previous history of hepatitis C and severe juvenile type of paracoccidioidomycosis characterized by involvement of the reticuloendothelial system, eosinophilia, lung compromise (pleural effusion), retinal hemorrhage, and blood culture positive to Paracoccidioides brasiliensis. The immune evaluation showed four precipitation lines to P. brasiliensis by the double immunodiffusion test. Treatment with amphotericin B and itraconazol resulted in resolution of the disease.

Candida albicans osteomyelitis: case report and literature review.

OBJECTIVE: Osteomyelitis due to Candida species is an unusual but recognized entity. However, with the increasing occurrence of factors predisposing to candidemia and invasive candidiasis, candidal osteomyelitis is being diagnosed more frequently. An unusual case of Candida albicans osteomyelitis is reported here, along with a review of the published literature on previously reported cases of this disease. METHODS: Report of the case and literature review. RESULTS: In this case, Candida albicans was isolated from the talus; however, the diagnosis was made after several cultures were performed. Only one other case of Candida osteomyelitis located in foot bones was found in the review. CONCLUSIONS: It is thought that this is the first case reported in Venezuela, and only the second in international literature.

Epidemiology of sporotrichosis in Venezuela.

BACKGROUND: Sporotrichosis is one of the most common subcutaneous mycoses in Venezuela. It is a granulomatous chronic infection with cutaneous or subcutaneous tissue lesions. Regional lymphatic involvement may be present; extracutaneous disease is rare. The causal fungus Sporothrix schenckii has been isolated from soil, vegetation, and animals on numerous occasions and in many localities throughout the world. The aim of this study is to describe clinical and epidemiological features of cases of sporotrichosis observed in Venezuela and review of the literature. PATIENTS AND METHODS: We included the demographic data, clinical features, diagnostic methods, treatment, and follow-up of patients with sporotrichosis from 1963 to 2009, diagnosed at the Department of Medical Mycology. RESULTS: One-hundred and thirty-three sporotrichosis cases were diagnosed. Most patients were under the age of 30 years (66.15%). In 61.6% of them, the mode of transmission was not identified. The predominant clinical form in this population was lymphocutaneous (63.15%). Direct microscopic diagnosis was performed in 123 cases, and 57.9% yielded positive results for asteroid body. CONCLUSIONS: Sporotrichosis is an endemic subcutaneous mycosis in Venezuela. There are no reports to this date of disseminated forms of the disease, even amongst patients with acquired immunodeficiency syndrome. Direct microscopic examination of wet mount slides with saline solution or distilled water in the search for asteroid bodies is paramount. Saturated sodium and potassium iodine solutions continue to be extremely efficacious and affordable to most of our patients, therefore our treatment of choice.

Isolation of Fungi and Gram Negative Bacteria from Toothbrushes and Bathroom Bioaerosols

Objective: To identify, using phenotypic methods, FGNB, NFGNB and Candida sp. in toothbrushes, and environmental samples of bathroom air in a group of students from the Dentistry School of the Universidad Central de Venezuela. Material and Methods: Thirty-four toothbrushes were supplied to the cohort during a 60-day period; environmental samples were collected in the rooms where toothbrushes were kept during this period. All samples were processed by traditional methods of microbiological counting isolation and phenotypic identification using selective and differential agar based on the international guidelines of the United States Pharmacopeia (USP) 38. Results: 82.36% of the toothbrush samples were positive to bacteria and fungi and 91.17% of the environmental samples were positive to enterobacteria. Conclusion: It is necessary to establish antiseptic protocols for the management, storage and disinfection of toothbrushes. The high rate of contamination may represent an opportunity for enterobacteria colonization of oral biofilms, reservoir to infection foci and metastatic infections in certain populations.

Oral Manifestations Associated to Paracoccidioidomicosis and Histoplasmosis

Objective: To determine the frequency and clinical forms of oral manifestations associated to Paracoccidioidomycosis (PCM) and Histoplasmosis. Material and Methods: 481 medical records of outpatients referred to the Medical Mycology Department were reviewed since 2009 to 2016. Data were analyzed using descriptive statistical methods. Results: 47 (9.77%) cases had oral manifestations, 29 (61.70%) were associated to PCM and 18 (38.29%) to histoplasmosis. For PCM, male-female ratio was 8:1 and 1:1 for histoplasmosis. The average age for PCM was 48 years old and 53 for histoplasmosis. All the PCM patients had more than 1 oral structure affected: 44.82% were gingival lesions and 27.58% palate. In patients with histoplasmosis, 6 (33.33%) were lesions affecting palate and 6 (33.33%) involving tongue. For both entities, painful ulcers and granulomatous-like lesions were the most prevalent clinical forms; however, we observed a wide range of other oral manifestations. Regarding PCM patient's comorbidities, 3 (10.34%) cases had HIV/AIDS, 8 (27.58%) histoplasmosis and 2 (6.89%) carcinomas. Whereas the comorbidities of patients with histoplasmosis, 2 (11.11%) had HIV/AIDS and 1 (5.55%) had carcinoma. Conclusion: In endemic countries for both mycoses, dentists must be aware of patients with mouth lesions, take advantage of epidemiologic clues that suggest risk factors and be acquainted with all the current diagnostic tests in order to make a quick diagnosis and treatment in highly suspicious cases.

Presentaciones atípicas de histoplasmosis: anemia hemolítica. Descripción de un caso y revisión de la literatura / Atypical presentations of histoplasmosis: hemolytic anemia. Case report and literature review

La histoplasmosis es una enfermedad granulomatosa, producida por Histoplasma capsulatum. Causa un amplio espectro de manifestaciones clínicas, la más frecuente es la pulmonar. En algunos casos se presentan formas diseminadas, con afectación de uno o múltiples órganos, con características atípicas, difíciles de reconocer. Reporte del caso: Se presenta el caso de un paciente masculino de 70 años de edad, procedente de Barinas, quien trabajó en una granja de gallinas, con diagnóstico de histoplasmosis y anemia hemolítica, las cuales se resolvieron con tratamiento antifúngico. Conclusiones: En Venezuela, zona endémica para esta micosis, el médico está obligado a tener un alto índice de sospecha acerca de la misma, teniendo en cuenta factores como la edad y la epidemiología. A la luz de nuestros conocimientos, es el tercer caso reportado.

Histoplasmosis is a granulomatous disease, produced by Histoplasma capsulatum. This fungus causes a wide range of clinical manifestations; the most common is the pulmonary form. In some cases, atypical presentations are described. Case report: a 70 year old male patient, from Barinas, Venezuela, who worked in a chicken farm, with diagnosis of histoplasmosis and hemolytic anemia is described. The patient improved with antifungal treatment. Conclusions: in Venezuela, an endemic area for this mycosis, clinicians must have a high suspicion index for this disease, taking into account risk factors, such as age and epidemiology. To our knowledge, this is the third case report in the literature.

Presentaciones atípicas de histoplasmosis / Atypical presentations of histoplasmosis

La histoplasmosis es una enfermedad granulomatosa, producida por Histoplasma capsulatum. Causa un amplio espectro de manifestaciones clínicas, la más frecuente es la pulmonar. En algunos casos se presentan formas diseminadas con afectación de uno o múltiples órganos, de características atípicas difíciles de reconocer. La patogenia de esta enfermedad es igual a la de tuberculosis y se ha descrito coinfección. Se reportan tres casos de histoplasmosis de presentación infrecuente: ancianos, coinfección con micobacterias, localizaciones atípicas y revisión de la literatura. El primer caso fue el de un paciente de 19 años de edad con absceso cerebral. El segundo y tercer caso correspondieron a personas mayores de 60 años, con coinfección por Histoplasma capsulatum y Mycobacterium sp, de presentación articular y enfermedad ginecológica, respectivamente. En Venezuela, zona endémica para esta micosis, el médico está obligado a tener un alto índice de sospecha acerca de la misma, teniendo en cuenta factores como la edad y la epidemiología. (Acta Med Colomb 2015; 40: 254-259).

Histoplasmosis is a granulomatous disease caused by Histoplasma capsulatum. It causes a wide spectrum of clinical manifestations, being the pulmonary the most common one. In some cases disseminated forms with involvement of one or multiple organs are manifested with atypical characteristics difficult to recognize. The pathogenesis of this disease is equal to that of TB and co-infection has been described. Three cases of infrequent presentation of histoplasmosis: elderly, co-infection with mycobacteria, atypical presentations and review of the literature are presented. The first case involved a 19-year-old with cerebral abscess. The second and third cases were for people over 60, co-infected with Histoplasma capsulatum and Mycobacterium sp, with joint involvement and gynecological disease, respectively. In Venezuela, endemic area for histoplasmosis, the doctor is required to have a high index of suspicion about this entity, taking into account factors such as age and epidemiology. (Acta Med Colomb 2015; 40: 254-259).

Paracoccidioidomicosis: clínica, epidemiología y tratamiento / Paracoccidioidomicosis: clinical considerations, epidemiology and treatment

Objetivo: caracterizar desde el punto de vista clínico, epidemiológico y de tratamiento, los pacientes con diagnóstico de paracoccidioidomicosis evaluados en la Consulta Externa de la Sección de Micología Médica del IMT-UCV y procedentes de otros hospitales del área de la Gran Caracas, cuyas muestras fueron procesadas en dicha Sección, entre los años 2001-2011. Métodos: estudio descriptivo de registros, donde se tomaron en cuenta las historias de los pacientes con diagnóstico de paracoccidioidomicosis. Resultados: la relación hombre:mujer obtenida fue de 6,5:1, sólo el 29,16% de los pacientes tenían ocupaciones agrícolas. Los síntomas más frecuentes fueron tos (50%) y pérdida de peso (45,06%) y los signos más comunes fueron lesiones en orofaringe (53,6%) y adenopatías (27,2%). 7,65% cursaron concomitantemente con infección por VIH/SIDA, 5,61% con tuberculosis y 6,63% con histoplasmosis. En cuanto al diagnóstico, el examen directo fue positivo en 87,5% de los casos, el cultivo en el 62,90% y la serología en el 88,46%. La mortalidad general fue de 4,11%. Discusión: La paracoccidioidomicosis es una enfermedad que puede ocurrir en pacientes inmunocompetentes e inmunocomprometidos; tiende a observarse ahora con mayor frecuencia en los pacientes con SIDA. El número de casos entre los pacientes del sexo femenino ha aumentado. La investigación acerca del lugar de origen, de la procedencia y la ocupación del paciente es importante a la hora de plantearse el diagnóstico. Esto debe ser tomado en consideración en un país endémico como el nuestro. Su diagnóstico es relativamente fácil en manos de personal entrenado.

Objective: to characterize from the clinical, epidemiological and treatment viewpoints, patients diagnosed with paracoccidioidomycosis and evaluated in the outpatient clinic of the Medical Mycology Section, at the IMT-UCV and from other hospitals in the greater Caracas area, whose samples were processed in this section between 2001-2011. Methods: descriptive study of records, taking into account the histories of patients diagnosed with paracoccidioidomicosis. Results: the male:female ratio obtained was 6.5:1; only 29.16% of the patients had agricultural occupations. The most common symptoms were cough (50%) and weight loss (45.06%), and the most common signs were oropharyngeal lesions (53.6%) and adenopathy (27.2%). Concomitantly, 7.65% had HIV/AIDS infection, 5.61% tuberculosis and 6.63% histoplasmosis. In terms of diagnosis, the direct exam was positive in 87.5% of cases, the culture in 62.90% and serology in 88.46%. Overall mortality was 4.11%. Discussion: paracoccidioidomycosis is a disease that can occur in immunocompetent and immunocompromised patients; currently, it tends to appear more frequently in patients with AIDS. The number of cases among female patients has increased. Research about the place of birth, the origin and the occupation of the patient is important when considering the diagnosis; this should be taken into consideration in an endemic country like Venezuela. Its diagnosis is relatively easy in the hands of trained personnel.

Respiratory allergies in Venezuela: are fungi responsible?

Exposure to fungi in the indoor environment may trigger hypersensitivity to a variety of fungi and is known to be an influencing factor in allergic rhinitis and asthma. A wide list of airborne fungal spores and dust containing fungi have been described for different environments; however, their clinical relevance is seldom clear. In this survey we measure levels of fungi indoor and outdoor of domestic dwellings of 10 patients with known chronic allergic respiratory disease to fungi. To measure hypersensitivity to fungi, Prick (sensitivity to fungi), RAST (specific serum IgE levels) and PAR (persistent allergic rhinitis) severity are assessed in relation to fungal load in the environment. Only association of PAR and indoor fungal load were found to be significant (P = 0.1648). No direct causality with sensitivity to the amount of exposure, or a hypersensitivity to a specific fungal genus could be established. There is still no consensus on the most relevant methods for measuring personal exposure and 'no safe levels' have been established yet.

Tinea nigra: report of twelve cases in Venezuela.

Tinea nigra is a superficial mycotic infection produced by Hortaea werneckii, formerly known as Phaeoannelomyces werneckii, formerly known as Exophiala werneckii, and Stenella araguata, the latter autochthonous in Venezuela, it was first described and named as Cladosporium castellanii in 1973. The present report describes 12 cases in the period of 1972-2002, diagnosed at the Medical Mycology Section at the Tropical Institute of the Universidad Central de Venezuela, in Caracas. This mycosis is more prevalent among young people, with fair skin, from 3 to 28 years of age, who visited beaches and in whom the lesions are more evident. Out of these 12 patients, 8 (66.66%) had Phaeoannelomyces werneckii as the causal agent and 2 (16.67%) Stenella araguata was isolated. Two patients had more than one macule, and curiously in these cases, each lesion was caused by a different species of the aforementioned fungus.

Neonatal candidiasis in Venezuela: clinical and epidemiological aspects.

A prospective study of the clinical and epidemiological aspects of Candida spp. sepsis was performed to assess the frequency, etiology, and risk factors in the neonatology service of the Pediatrics Hospital "Dr. Elías Toro" (2002-2003). Forty four out of 128 neonatal intensive care patients, with clinical sepsis and suspected fungal etiology, were chosen randomly for this study. Infant blood, urine, gastrointestinal tract, oral and skin samples were cultured. Samples were also taken from health care worker hands and the environment. The antifungal susceptibility patterns of the isolates were evaluated. The prevalence of Candida spp. from the clinical samples was: C. albicans (72.06%), C. parapsilosis (13.24%), C. tropicalis (10.29 %), C. guilliermondii (2.94%), and C. glabrata (1.47%). Due to the similarity of the susceptibility pattern of some isolates from infants and health care workers, we speculate a horizontal nosocomial infection. Statistical analysis revealed the following significant risk factors associated with Candida spp. isolation: prolonged hospitalization (p < 0.05), missing prenatal birth control (p < 0.05), and parenteral nutrition (p < 0.05). Blood cultures were all negative for bacteria and only 2.90% were positive for Candida spp. All 44 neonates receiving empirical therapy with amphotericin B (0.5-1.0 mg/k/day) evolved satisfactorily.

Detection of Candida dubliniensis in Venezuela.

Over the past decades there has been a significant increase in fungal infections caused by Candida species, and continues to be common in immunocompromised individuals infected with the human immunodeficiency virus (HIV). Although Candida albicans remains the fungal species most frequently isolated as an opportunistic oral pathogen, other non-albicans are often identified in this cohort of patients, including C. dubliniensis. This yeast is closely related to and shares many phenotypic characteristics with C. albicans. Colonies of these two species appear morphologically identical when not grown on special media. The shared phenotypic characteristics of C. dubliniensis and C. albicans suggest that many C. dubliniensis isolates may have been misidentified as C. albicans in the past. The present studies aim is to recover and identify C. dubliniensis, and presumptive clinical C. albicans, from the oral cavities of HIV-seropositive individuals, comparing conventional media to obtain a simple, low-cost and reliable identification system for C. dubliniensis. A total of 16 isolates (3,98%) had been obtained from 402 HIV infected individuals with recurrent oropharyngitis and were identified as C. dubliniensis. Out of these C. dubliniensis isolates 19% were resistant, with MICs above 64 microg/ml to fluconazole. This constitutes, to the authors knowledge the first recovery of this organism in Venezuela.

Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates

Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates. Paracoccidioidomycosis (PCM) is a progressive systemic mycosis caused by the fungus Paraccocidioides brasiliensis (Pb), endemic to Venezuela and Latin America. In this study, eight different Venezuelan isolates obtained from patients with PCM, were inoculated intraperitoneally in Syrian hamsters (Cricetus auratus) and studied by immune-serum. Each strain was collected by gently scraping the surface of the culture medium (Sabouraud Dextrose Agar) and suspended in 3ml of 0.15 M phosphate-buffered saline. The antigen obtained was called Paraccocidioides brasiliensis Crude Antigen (CAP). Immunoblotting results showed that the immune-sera from hamsters recognized at least 3 bands: one over 200 kDa, and two of 80 and 15-20 kDa. This study suggests that IgG anti-CAP can reveal a significant variability in the eight Venezuelan isolates. Sera from 88 infected hamsters were evaluated by ELISA with eight different CAPs and Western blot with CAP 37383. ELISA results showed that, the antigen of the virulent isolate 37383 had the highest percentage (38%) of positivity, while the non-virulent isolate 1458 had the lowest one (13.6%). Furthermore, scanning densitometry revealed that the isolate 37383 had less bands than the non-virulent isolates. These results suggest that the ELISA test with CAP 37383 can detect circulating antibodies, and that this virulent isolate may be useful for the diagnosis of PCM, and to monitor disease responses to treatments. Rev. Biol. Trop. 57 (3): 505-513. Epub 2009 September 30.

La Paracoccidioidomicosis (PCM), es una micosis sistémica causada por el hongo Paraccocidioides brasiliensis (Pb), endémica en Venezuela y Latino América. En este estudio ocho diferentes aislados venezolanos, obtenidos de pacientes con PCM, fueron inoculados intraperitonealmente en hámsteres y fueron estudiados por ELISA e inmunoblotting. Los antígenos obtenidos de P. brasiliensis fueron llamados, Antígeno Crudo (CAP). Los resultados del immunoblotting mostraron que los sueros inmunes de hámsteres reconocieron al menos tres bandas: una sobre 200, y otras de 80, y 15-20 kDa. Este estudio sugiere que la IgG anti-CAP muestra una variabilidad en los ocho aislados Venezolanos. Sueros de 88 hámsteres infectados fueron evaluados usando ELISA, el antígeno del aislado virulento 37383 mostró el más alto porcentaje de positividad (38%) en los sueros de los hámsteres estudiados. El aislado novirulento 1458 mostró un porcentaje bajo de positividad (13.6%). Además, un escaneo densitométrico reveló que el aislado 37383 tiene menos bandas que el otro aislado no-virulento. Por lo tanto, estos resultados sugieren que el ensayo de ELISA con CAP 37383 puede detectar anticuerpos circulantes y este aislado virulento puede ser útil para el diagnostico de PCM, y para el monitoreo de la respuesta al tratamiento de la enfermedad.

Aspergillus species in patients with chronic rhinosinusitis.

The aim of this study was to determine the frequency of Aspergillus spp. in the paranasal cavities of 40 patients with suspicion of chronic rhinosinusitis, by standard mycological as well as serological examinations. We found Aspergillus in nine of 37 patients.