2005, Número 3-4
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Microbiología 2005; 47 (3-4)
Comparación de dos métodos por PCR/RFLP para identificar y tipificar herpevirus simplex aislados de pacientes con lesiones cutáneas o mucotáneas
Herrera-Martínez E, Ondarza-Aguilera R, Estrada-Parra S, Pérez DG, Barrón BL
Idioma: Ingles.
Referencias bibliográficas: 43
Paginas: 76-81
Archivo PDF: 86.10 Kb.
RESUMEN
Se han descrito una gran variedad de reacciones de amplificación en cadena de la polimerasa (PCR) para detectar y tipificar a los virus herpes simplex (HSV). En este trabajo se comparan dos reacciones de PCR acopladas a la restricción enzimática (PCR/RFLP) para detectar y tipificar a los HSV. Se diseñaron dos pares de iniciadores, unos para amplificar una región del gen UL30 y otros para una región del gen UL15 de los HSV. La tipificación se hizo por restricción de los amplicones de UL30 y UL15, con la enzimas AvaII y Hpa II, respectivamente. Esta estrategia se probó con dos cepas de referencia de HSV (la cepa MacIntyre de HSV-1 y la cepa G de HSV-2), así como con 47 cepas de HSV aisladas de pacientes. Las dos PCRs produjeron los amplicones esperados (uno de 492 pb para UL30 y de 305 pb para UL15). La restricción de esos dos amplicones claramente diferenció a HSV-1 de HSV-2 y con ambos genes se obtuvieron los mismos resultados. Treinta y uno (66%) de los aislados virales fueron identificados como HSV-1 y los otros 16 (34%) como HSV-2. La mayoría de los aislamientos de HSV-1 (27/31) se obtuvieron de muestras de lesiones orofaciales y toráxicas; pero también la mitad de los aislamientos de HSV-2 (8/16) fueron de las mismas regiones anatómicas. Nuestros resultados mostraron que cualquiera de las dos PCR/RFLP se puede utilizar para detectar y tipificar HSV. E inclusive los resultados del sitio anatómico del aislamiento de HSV-1 y HSV-2 coinciden con los trabajos de otros autores que han demostrado el cambio en cuanto al sitio clásico de localización de las infecciones producidas por los herpesvirus.
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