Evaluation of embryotoxic and embryostatic effects of the aqueous extract of Rhizophora mangle and tannic acid on eggs and larvae of Aedes aegypti.

Rhizophora mangle is an abundant plant in mangroves and tannic acid is a polyphenol produced by the secondary metabolism of plants. The aim of the study was to evaluate the embryotoxic and embriostatic effects of the aqueous extract of R. mangle and synthetic tannic acid on eggs and larvae of Aedes aegypti. A. aegypti eggs were exposed in duplicate at concentrations of 250, 500, 750 and 1000 µg/mL of extract and tannic acid for a period of 14 days. Mineral water was used as a negative control. The eggs were observed and counted in a stereomicroscope (1.2x). In all extract concentrations there was stimulation in hatching in relation to the control, but only in concentration of 750 mg/mL it was statistically significant. In tannic acid (250µg/ml) there was significant stimulus in hatching, but in 500, 750 and 1000 µg/mL there was significant inhibition. All concentrations of aqueous extract and tannic acid on larvae showed embryotoxic and embryostatic effects when compared to the control. The aqueous extract of R. mangle showed effect on hatching of A. aegypti eggs and synthetic tannic acid showed embryotoxic and embryostatic effects. On larvae, both the aqueous extract as tannic acid showed embryotoxic and embryostatic effects.

Occurrence of Paecilomyces spp. in Containers of Anatomic Pieces / Presencia de Paecilomyces spp. en Contenedores de Piezas Anatómicas

Species of hyphomicete genus Paecilomyces spp. inhabitants of a wide variety of enviromental niches, causing economic damage and mycosis in animals and humans. Since 2000, was perceived the occurrence of Paecilomyces spp. in containers of anatomic pieces in the hall of anatomy from the Pernambuco Federal Rural University, Brazil. Its is injuring anatomic pieces and putting in risk the health the people which work in the place. Studies have been done to solve this problem.

: Especies de Hyphomicete genus Paecilomyces habitantes de una gran variedad de nichos medioambientales, son causantes de daño económico y micosis en animales y humanos. Desde el año 2000, percibimos la aparición de Paecilomyces spp. en contenedores de piezas anatómicas en el pabellón de Anatomía de la Universidade Federal Rural de Pernmbuco, Brasil.Las piezas anatómicas estaban dañándose y poniendo en riesgo la salud de las personas que trabajaban en el lugar. Se han hecho estudios para resolver este problema.