Contribución a la determinación de la etiología de la fibropapilomatosis de la tortuga lora (Lepidochelys olivacea) que anida en el Refugio Nacional de Vida Silvestre de Ostional
Fecha
2007-09-27
Autores
Brenes Cháves, Laura Sofía
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Editor
Universidad Nacional, Costa Rica
Resumen
La fibropapilomatosis en la tortuga marina es una enfermedad caracterizada por
múltiples papilomas, fibromas y fibropapilomas cutáneos, así como ocasionales fibromas
viscerales. En el presente trabajo se realizó una investigación en 26 tortugas lora (Lepidochelys
olivacea) con fibropapilomas cutáneos y 24 tortugas lora sanas que sirvieron de control, en el
Refugio Nacional de Vida Silvestre de Ostional. Se tomaron biopsias excisionales de los
tumores cutáneos de las tortugas enfermas y biopsias de piel de las tortugas control, además se
recolectó muestras de sangre a todas las tortugas. Las muestras tumorales y de piel se
analizaron microscópicamente para diferenciar los factores histológicos que resultan de la
patogénesis de la enfermedad. También se realizó PCR a las muestras para determinar la
presencia de genoma viral de tres posibles virus: herpesvirus, papilomavirus y retrovirus, en los
tumores como posibles agentes etiológicos. A las muestras de sangre se les hizo análisis
hematológico y de química sanguínea para comparar los resultados entre tortugas sanas y
enfermas. Entre los hallazgos histopatológicos se determinó que los fibropapilomas de la
tortuga lora eran similares a los muy estudiados fibropapilomas de las tortugas verdes y a su
vez a los de otras especies de reptiles, aves y mamíferos. Con el estudio de PCR se pudo
determinar que el genoma viral de mayor presencia en los tumores era el del virus herpes por lo
que es discutible su presencia como posible agente etiológico.
Sea turtle fibropapillomatosis is a disease characterized by proliferation of cutaneous fibropapillomas and occasional visceral fibromas. In the present work a research was conducted on 26 olive ridley sea turtles (Lepidochelys olivacea) with cutaneous fibropaillomas and in 24 healthy olve ridley turtles, which served as control in the Ostional National Wildlife Refuge. Biopsies of the cutaneous tumors were taken in sick sea turtles, and skin biopsies in control ones, besides a blood sample were collected on every single turtle. The tumoural samples were microscopically analyzed in order to differentiate the histological factors resulting in the disease pathogenesis. A PCR technique was also run to the samples in order to determine the viral presence in the tumours as a possible etiologic agent. Blood chemistry and haematological analysis were applied to all of the blood samples to compare the results between healthy and sick turtles. Among the histopathologic analysis it was determined that the fobropapillomas in olive ridley turtle were similar to those studied in the green sea turtle (Chelonia mydas), and also similar with other species of reptiles, birds and mammals. With PCR analysis it was determined that the herpes virus was the most common found in tumors as the possible etiological agent
Sea turtle fibropapillomatosis is a disease characterized by proliferation of cutaneous fibropapillomas and occasional visceral fibromas. In the present work a research was conducted on 26 olive ridley sea turtles (Lepidochelys olivacea) with cutaneous fibropaillomas and in 24 healthy olve ridley turtles, which served as control in the Ostional National Wildlife Refuge. Biopsies of the cutaneous tumors were taken in sick sea turtles, and skin biopsies in control ones, besides a blood sample were collected on every single turtle. The tumoural samples were microscopically analyzed in order to differentiate the histological factors resulting in the disease pathogenesis. A PCR technique was also run to the samples in order to determine the viral presence in the tumours as a possible etiologic agent. Blood chemistry and haematological analysis were applied to all of the blood samples to compare the results between healthy and sick turtles. Among the histopathologic analysis it was determined that the fobropapillomas in olive ridley turtle were similar to those studied in the green sea turtle (Chelonia mydas), and also similar with other species of reptiles, birds and mammals. With PCR analysis it was determined that the herpes virus was the most common found in tumors as the possible etiological agent
Descripción
Modalidad: Tesis
Palabras clave
TORTUGA LORA, LEPIDOCHELYS OLIVACEA TUMORES, ENFERMEDADES DE LA PIEL