23 research outputs found
Epstein Barr Virus detection and latent membrane protein 1 in oral hairy leukoplakia in HIV+ Venezuelan patients
Purpose: To determine the prevalence of Epstein Barr Virus (EBV) in oral hairy leukoplakia lesions (OHL) in HIV+ Venezuelan patients. Material and Method: In this case study, we evaluated 21 HIV+ adult patients with clinically present OHL lesions, 11 who were undergoing antiretroviral therapy, 10 who were not undergoing therapy and 10 HIV-negative adult patients with hyperkeratotic oral mucosal lesions. All of the subjects were assessed at the Infectious Disease Center, Faculty of Dentistry, Central University of Venezuela, and were clinically examined to detect oral mucosal lesions with the confirmed histopathologic diagnosis. Nested-PCR was used to determine the EBV infection and the latent membrane protein-1 (LMP-1) expression by immunohistochemistry. Results: Of the subjects, 16/21 (76%) of the HIV+/AIDS patients tested positive for EBV, whereas 5/10 (50%) of the HIV-negative subjects tested positive for EBV. Conclusions: In the present study, a higher EBV prevalence was observed in HIV-positive patients when compared to HIV-negative patients without oral hairy leukoplakia, confirming the etiologic role in this entity. The LMP-1 in OHL patients who were both HIV+ and EBV+ was highly expressed (60%) at the epithelial basal cells. No association between the alcohol and tobacco consumption was observed among the EBV-positive cases
Prevalencia de lesiones bucales en pacientes VIH +, relación con contaje de células CD4+ y carga viral en una población Venezolana
Objetivo: Determinar la prevalencia de las lesiones bucales en un grupo de pacientes VIH+, su relación con el contaje de linfocitos CD4 y la carga viral, en una muestra de la población venezolana
Materiales y métodos: En el presente estudio se evaluaron 75 pacientes adultos VIH+, provenientes del Centro para la Atención de Pacientes con Enfermedades Infectocontagiosas de la Facultad de Odontología de la Universidad Central de Venezuela. Cada uno de ellos fue examinado clínicamente para la detección de las lesiones presentes en la mucosa bucal. Igualmente se les determinó el contaje de células CD4+ mediante citometría de flujo, así como la carga viral mediante la técnica TR-RCP (Transcriptasa Reversa-Reacción en Cadena de la Polimerasa) (Amplicor HIV-1-RNA, TM test 1.5, Roche).
Resultados: 85% (64/75) de los pacientes VIH/SIDA presentaron lesiones asociadas a la infección por VIH. Entre ellas, la Candidiasis constituyó la forma más frecuente representando un 61% (39/64), seguida por la Leucoplasia Vellosa con 53% (34/64), Leucoplasia Bucal 34% (22/64), Hiperpigmentación Melánica 38% (18/64). Papiloma 13% (6/64), Eritema Gingival Lineal 8% (5/64), Estomatitis Aftosa Recidivante 5% (4/64), Sarcoma de Kaposi 5% (3/64). Se presentó un solo caso (2%) de cada una de las lesiones que se enumeran a continuación: Linfoma No Hodgkin, Hiperplasia Epitelial Multifocal, Herpes Labial, Histoplasmosis y Molusco Contagioso. Los pacientes con una carga viral de 30.000 copias/mm3, presentaron lesiones bucales relacionadas con VIH independientemente del contaje de células CD4+, aunque los pacientes con niveles de CD4+ menores a 200 cel//mm3, fueron mas susceptibles a desarrollar estas lesiones.
Conclusiones: La lesión oral mas frecuente fue la Candidiasis bucal, seguida por la Leucoplasia vellosa, Leucoplasia bucal, e Hiperpigmentación melánica. Una alta carga viral estuvo fuertemente asociada a la presencia de lesiones, independientemente del contaje de células CD4+.Aim: To determine the prevalence of oral lesions in a HIV + group of patients, related to CD4 cell count and viral load in a Venezuelan population.
Materials and methods : In the present study, we evaluated 75 HIV+adult patients, attended at the Center of Infectious Diseases, at the Faculty of Dentistry, Central University of Venezuela. Each patient was clinically examined for detection of oral mucosal lesions. In addition, CD4 cell count was determined by flow cytometry, as well as viral load by RT-PCR (Amplicor HIV-RNA, TM test 1.5, Roche)
Results: 85% (64/75) of HIV/AIDS patients showed associated HIV lesions. Oral Candidiasis constituted the most common lesion representing a 61% (39/64), followed by Oral Hairy Leukoplakia 53% (34/64); Oral Leukoplakia 34% (22/64), Melanic Hiperpigmentation 38% (18/64); Papilloma 13 (6/64), Lineal Gingival Erithema 8% (5/64); Aphtous Recurrent Stomatitis 5% (4/64) and Kaposi's Sarcoma 5% (3/64). Only one case of the following lesions were represented by Non Hodgkin Lymphoma, Multifocal Epithelial Hyperplasia, Recurrent Herpes, Histoplasmosis and Molluscum Contagiosum. The patients with a viral load of 30.000 copies/mm3 exhibited oral lesions related with HIV, independent of CD4 cell count, although patients with CD4+ levels of 200 cel/mm3 were more susceptible to develop these lesions.
Conclusions: The most common oral lesion was Oral Candidiasis followed by Oral Hairy Leukoplakia, Oral Leukoplakia and Melanic Hyperpigmentation. A high viral load was strongly associated to the oral lesions occurrence independently of CD4+ cell count
Prevalence of oral lesions in HIV patients related to CD4 cell count and viral load in a Venezuelan population
Aim: To determine the prevalence of oral lesions in a HIV + group of patients, related to CD4 cell count and viral load in a Venezuelan population. Materials and methods: In the present study, we evaluated 75 HIV+adult patients, attended at the Center of Infectious Diseases, at the Faculty of Dentistry, Central University of Venezuela. Each patient was clinically examined for detection of oral mucosal lesions. In addition, CD4 cell count was determined by flow cytometry, as well as viral load by RT-PCR (Amplicor HIV-RNA, TM test 1.5, Roche) Results: 85% (64/75) of HIV/AIDS patients showed associated HIV lesions. Oral Candidiasis constituted the most common lesion representing a 61% (39/64), followed by Oral Hairy Leukoplakia 53% (34/64); Oral Leukoplakia 34% (22/64), Melanic Hiperpigmentation 38% (18/64); Papilloma 13 (6/64), Lineal Gingival Erithema 8% (5/64); Aphtous Recurrent Stomatitis 5% (4/64) and Kaposi?s Sarcoma 5% (3/64). Only one case of the following lesions were represented by Non Hodgkin Lymphoma, Multifocal Epithelial Hyperplasia, Recurrent Herpes, Histoplasmosis and Molluscum Contagiosum. The patients with a viral load of 30.000 copies/mm3 exhibited oral lesions related with HIV, independent of CD4 cell count, although patients with CD4+ levels of 200 cel/mm3 were more susceptible to develop these lesions. Conclusions: The most common oral lesion was Oral Candidiasis followed by Oral Hairy Leukoplakia, Oral Leukoplakia and Melanic Hyperpigmentation. A high viral load was strongly associated to the oral lesions occurrence independently of CD4+ cell count
FLUCONAZOL: SEGURIDAD Y EFICACIA EN EL CONTROL DE LA ESTOMATITIS SUB-PROTÉSICA ASOCIADA A Candida
La Estomatitis Sub-Protésica (E.S.P.) describe cambios patógenos encontrados en los tejidos de soporte de la dentadura. Dichos cambios se caracterizan por la presencia de un eritema, debido entre otros factores a la proliferación de microorganismos del Género Candida. Es por ello que el objetivo principal del presente trabajo fue comprobar la eficacia del Fluconazol (Diflucán®) tanto por vía oral como en forma tópica sobre la mucosa afectada, en un grupo de pacientes con diagnóstico de E.S.P. inducida por Candida. En esta investigación se seleccionaron 30 pacientes que acudieron al Servicio de Clínica Estomatológica "Magdalena Mata de Henning" con diagnóstico presuntivo de E.S.P., éstos fueron divididos en 3 grupos de 10 pacientes cada uno: Grupo A: Los cuales fueron medicados una vez al día con Fluconazol (Diflucán®), administrado por vía oral, y aplicado tópicamente en forma de suspensión en la prótesis, en ambos casos durante 14 días; Grupo B: Quienes fueron medicados una vez al día con Fluconazol (Diflucán®), administrado por vía oral por 14 días, pero sin medicación para la prótesis. Grupo C: A quienes se les administró un placebo una vez al día, durante 14 días pero sin aplicación de producto sobre la prótesis. De igual manera, se les dictaron instrucciones a todos los pacientes en relación con el mantenimiento de una adecuada higiene bucal, así como realizarla previa administración del tratamiento antimicótico. En este estudio se demostró que el tratamiento antimicótico con Diflucán®, es eficaz contra la E.S.P. inducida por Candida.Palabras clave: Fluconazol, Estomatitis Sub-Protésica, Candida.SUMMARY:Denture Stomatitis (DS), defined as a confluent erythema and oedema of the denture bearing area of the palate. The ocurrence of Candida can be demonstrated in the mouth in persons with DS to a significantly higher degree than in healthy controls, and differents antifungal agents has frecuently been used in dental practice in order to cure the disease. The purpose of this study was to evaluate the clinical efficacy and the safety of oral fluconazole (Diflucan ) in patients with denture stomatitis. The study was perfomed using an open test method, without a comparative drug. Thirty five patients, aged between 28 to 59 years old, were included in the investigation. Candida was cultured from the surface of maxillary dentures and mucosa of all the patients. Patients were treated with oral fluconazole (50mg) given once daily for 14 days and medication of dentures with the same agent. The effect of treatment was evaluated by changes in the clinical erythema, the yeast colonization obtained by mycologic sampling on the palatal mucosa and on the denture base. Results showed that Candida albicans was the most frequent species found in all the patients. We could also demonstrate that the implemented therapy was significantly effective in reducing the candidal populations of the maxillary denture as assessed by scoring of smears and cultures of the palatal denture-bearing mucosa. We concluded that fluconazole is an effective treatment for denture stomatitis, including those patients who persist in wearing dentures continuosly.Key words: Fluconazole, Denture Stomatitis, Candida
DETECCIÓN DE Candida albicans. EN LESIONES DE LEUCOPLASIA VELLOSA BUCAL DE UN GRUPO DE PACIENTES VENEZOLANOS VIH+
El objetivo del presente estudio fue determinar la prevalencia de la infección por Candidaalbicans en lesiones de Leucoplasia Vellosa Bucal (LVB) en un grupo de pacientes VIH+ en unamuestra de la población venezolana. Para ello se evaluaron 21 pacientes adultos VIH+, conlesiones clínicas de Leucoplasia Vellosa Bucal, 11 con terapia antiretroviral y 10 sin terapia, y10 pacientes adultos VIH- con lesiones hiperqueratósicas de la mucosa oral provenientes delCentro para la Atención de Pacientes con Enfermedades Infectocontagiosas de la Facultad deOdontología de la Universidad Central de Venezuela. Los pacientes fueron examinadosclinícamente para la detección de lesiones presentes en la mucosa oral, confirmándose eldiagnóstico con el estudio histopatológico. La infección por C albicans se determinó mediantebiopsias de las lesiones para su estudio histopatológico empleando dos técnicas diferentes,coloración de Pass y método de Grocott, y cultivo microbiológico en medio Agar SabouraudResultados: En pacientes VIH+ según los distintos métodos empleados se pudo observar quemediante el cultivo en Agar Sabouraud 6/21 (29%) de los pacientes fueron positivos y 15/21(71%) fueron negativos. Con respecto a la coloración de Grocott, todos los 21 pacientes fueronpositivos, mientras que con la coloración de PAS, 17/21 (81%) de los pacientes fueronpositivos y 4/21 (19%) fueron negativos. En el caso de los pacientes VIH- con leucoplasiabucal, 1/10 (10%) resultó positivo mediante el cultivo en Agar Sabouraud y 9/10 (90%)fueron negativos. Mediante la coloración de Grocott todos los pacientes (10) fueron negativospara la presencia del hongo, e iguales resultados fueron obtenidos con la coloración de PAS.Conclusión: Se observó una mayor prevalencia de la infección por C. albicans en pacientesVIH+ lo que demuestra que la presencia del hongo, constituye un factor fuertemente asociadoa los pacientes con LVB.ABSTRACT The aim of this study was to determine the prevalence of Candida albicans infection in OralHairy Leukoplakia (OHL) in Venezuelan HIV+ population. We evaluated 21 HIV+ adultspatients with the clinical diagnosis of OHL, 11 under antiretroviral therapy, 10 without and 10HIV negative adults with hyperkeratotic lesions on the oral mucosa as a control group, fromthe Center of Infectious diseases, Faculty of Dentistry, Central University of Venezuela. Allpatients were clinically examined and definitive histopathological diagnosis was made. Calbicans was detected by two different histochemical methods: PAS and Groccot andmicrobiological culture using Agar Sabouraud medium. The results demonstrated that 6/21(29%) patients were positive by microbiological culture and 15/21 (71%) were negative. Allthe patients were positive by Grocott special stain while 17/21 (81%) were positive using PAS.In the control group, 1 patient was positive by culture and 9/10 (90%) were negative.Additionally, all the patients were negative by Grocott and PAS. In conclusion, we observed ahigher prevalence of C. albicans infection in HIV+ patients, suggesting that the presence ofthis microorganism may constitute an associated factor in OHL. 
DETECCION DE Mycobacterium tuberculosis POR MÉTODOS MICROBIOLOGICOS CONVENCIONALES Y CARACTERISTICAS DEL PERIODONTO DE UN GRUPO DE PACIENTES CON TUBERCULOSIS
Objetivo: establecer la importancia del diagnóstico microbiológico de la Tuberculosis.Metodología: 15 pacientes que asistieron al servicio del Hospital Simón Bolívar, Caracas Venezuela, con cuadro clínico presuntivo de Tuberculosis pulmonar fueron estudiados a través del examen en cavidad bucal, radiografía de tórax, Baciloscopía (BK) y método de Petroff, tomando en consideración los signos y síntomas de cada uno de ellos.Resultados: 11 de las 15 muestras de esputo fueron BK (+) y 4 BK (-). Mycobacterium tuberculosis se aisló en 7 de las muestras incluyendo los pacientes que presentaron BK (-). Desde el punto de vista radiográfico, 10 pacientes presentaron lesión bilateral, 4 lesión unilateral y 1 fibrotorax. El examen en cavidad bucal permitió observar enfermedad periodontal de leve a moderada en 14 de los pacientes, 8 de ellos de manera localizada y 6 de manera generalizada.La detección de M. tuberculosis a través del BK sigue siendo un método de importancia para establecer en conjunto con los antecedentes, epidemiología, clínica, radiografía, serología e histopatología del paciente el diagnóstico definitivo de la tuberculosis, sin embargo, la técnica de PCR puede complementar dicho estudio.Palabras clave: Mycobacterium tuberculosis, Baciloscopía, cavidad bucal.Abstract.Mycobacterium tuberculosis, aethiological agent of tuberculosis is a curved, aerobic, non sporulated and non motile rod that is a resistant aganaist dissecation effects. 15 patients were selected in this study who assited to Neumonology service located at Simón Bolívar Hospital, Caracas, Venezuela. These patients who had presuntive lung tuberculosis were studied considering their sings and simthomps. Oral cavities of each patient were studied considering their sings and sinthomps. Oral cavities of each patient were examinated and thorax Rx, Bacilloscopy (BK) and Petroff method were taked from each one in order to detect this rod. Our findings related that 11 out of 15 sputum samples were BK (+) and the other 4 were BK (-). M. tuberculosis was isolated in 7 samples, including BK (-) patients. Radiografically, 10 patients presented bilateral lesion, 4 presented unilateral lesion and 1 fibrothorax. Examination of oral cavities showed that 8 patients presented localizated periodontal disease and 6 presented generalizated periodontal disease.Detection of M. tuberculosis using BK continue to be an important method for identification of this bacteria, considering also epidemiological, clinical, radiographical, serological and histopathological studies in order to establish definitive diagnosis of TBC. Aditionally, Polimerase Chain Reaction (PCR) is an excellent method used to complement identification studies of this microorganism.Key words: Mycobacterium tuberculosis, Bacilloscopy, oral cavities