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Identification of 43 C. neoformans isolates from human sources were performed using the Beijerinck auxonogram method modified by Araujo and the MicroScan® DADE BEHRING automatic test. Identification of the isolates was achieved... more
Identification of 43 C. neoformans isolates from human sources were performed using the Beijerinck auxonogram method modified by Araujo and the MicroScan® DADE BEHRING automatic test. Identification of the isolates was achieved reliably by both tests. Therefore the Araujo Auxonogram method may be applied in small laboratories with limited resources as an inexpensive, simple and reliable method.
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Se ha observado un incremento de las infecciones causadas por Histoplasma capsulatum, particularmente en pacientes inmunocomprometidos. El objetivo del estudio fue determinar las caracteristicas de la histoplasmosis en pacientes con... more
Se ha observado un incremento de las infecciones causadas por Histoplasma capsulatum, particularmente en pacientes inmunocomprometidos. El objetivo del estudio fue determinar las caracteristicas de la histoplasmosis en pacientes con leucemias y linfomas del Hospital Universitario de Caracas, Clinica Atias y Hospital Miguel Perez Carreno, cuyo diagnostico etiologico fue realizado en la Seccion de Micologia Medica del Instituto de Medicina Tropical, UCV, en los ultimos siete anos. Se diagnosticaron 30 pacientes con histoplasmosis, 25 fueron adultos y 5 pediatricos. El 83% provenia de la Gran Caracas. 2 estaban embarazadas. El 46% tenian leucemia mieloide aguda, 20% leucemia linfoide aguda, 23% linfomas. En 83% de los casos el diagnostico se hizo durante la neutropenia febril y la enfermedad de base no estaba en remision. Los pacientes se encontraban en tratamiento segun la enfermedad de base, de acuerdo con los protocolos establecidos por los servicios de hemato-oncologia de los respe...
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Research Interests: Humanities and Medicine
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"... more
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 f...
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... Pp. 157. 14. Roberts D, Horstmeier D, Land A, and Foxworth H. (1978). Rapid Urea Broth Test for Yeasts. Journal of Clinical Microbiology. ... 10: 380-381. 19. Ruane J, Walker J, and Lance W. (1988). Disseminated Infection caused by... more
... Pp. 157. 14. Roberts D, Horstmeier D, Land A, and Foxworth H. (1978). Rapid Urea Broth Test for Yeasts. Journal of Clinical Microbiology. ... 10: 380-381. 19. Ruane J, Walker J, and Lance W. (1988). Disseminated Infection caused by Urease Negative Cryptococcus neoformans. ...
Research Interests: Humanities and Biology
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... more
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.
Research Interests: Microbiology, Plant Biology, Medical Microbiology, Biology, Medicine, and 15 moreHumans, Candida, Fluconazole, Candida albicans, Fungal Infection, Hiv Infection, Phenotype, Human immunodeficiency virus, Genotype, Mouth, Antifungal Agents, Microbial Sensitivity Tests, Oral Cavity, Candida dubliniensis, and HIV infections
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... more
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.
Research Interests: Plant Biology, Venezuela, Adolescent, Young People, Medicine, and 10 moreMedical Mycology, Humans, Child, Female, Male, Adult, Hand, Ascomycota, Child preschool, and Tinea
Research Interests: Plant Biology, Dermatology, Medicine, Humans, Child, and 10 moreFemale, Candida, Male, Aged, Middle Aged, Adult, Antifungal Agents, Thymol, Paronychia, and Chloroform
In the last five years, as HAART has become standard therapy in HIV seropositive or AIDS patients, changes have been noted in the numbers and types of opportunistic fungal infections in these cohorts of patients. Particularly,... more
In the last five years, as HAART has become standard therapy in HIV seropositive or AIDS patients, changes have been noted in the numbers and types of opportunistic fungal infections in these cohorts of patients. Particularly, oropharyngeal candidiasis have become rare in HIV infected patients since the introduction of new anti-HIV drugs of the protease inhibitors type. At the Immunology
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Research Interests: Microbiology, Medical Microbiology, Biology, Antibiotic Susceptibility Testing, Infectious Diseases, and 15 moreMedicine, Humans, Candida, Fluconazole, Candidiasis, Candida albicans, Antifungal, Candida Glabrata, Antifungal Agents, Microbial Sensitivity Tests, Itraconazole, Antimicrobial susceptibility testing, Candida Tropicalis, Posaconazole, and Thallophyta
Base de dados : LILACS. Pesquisa : 399683 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos... more
Base de dados : LILACS. Pesquisa : 399683 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos relacionados. Id: 399683. ...
Se describe en esta nota técnica las modificaciones realizadas al sistema ID-Fungal anticuer-pos de la línea IMMY para serología de hongos. De las cuales la primera se relaciona con el incre-mento de la sensibilidad de la técnica a través... more
Se describe en esta nota técnica las modificaciones realizadas al sistema ID-Fungal anticuer-pos de la línea IMMY para serología de hongos. De las cuales la primera se relaciona con el incre-mento de la sensibilidad de la técnica a través de la concentración del ...
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Base de dados : LILACS. Pesquisa : 399675 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos... more
Base de dados : LILACS. Pesquisa : 399675 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos relacionados. Id: 399675. ...
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... Auxonogram Method Modified by Araujo Pérez, Celina; Hernández, Yumaira; ... Page 12. kasmera32(1)completa Arechavala Al. Robles AM, Negroni R, Bianchi MH, Taborda A. Valor de los métodos directos e indirectos de diagnóstico en las... more
... Auxonogram Method Modified by Araujo Pérez, Celina; Hernández, Yumaira; ... Page 12. kasmera32(1)completa Arechavala Al. Robles AM, Negroni R, Bianchi MH, Taborda A. Valor de los métodos directos e indirectos de diagnóstico en las micosis sistémicas asociadas al SIDA. ...