Effect of Penicillium frequentans and Stachybotrys chartarum on respiratory metabolism of developing eggs of Ascaris suum (Nematoda)

Abstract

Effect of saprotrophic soil fungi <i>Penicillium frequentans</i> and <i>Stachybotrys chartarum</i> on respiratory metabolism of <i>Ascaris suum</i>, during its embryogenesis was determined using histoenzymatic methods. Based on histochemical assessment of the enzyme actvity (glycolysis-lactate dehydrogenase-LDH; tricarboxylic acid cycle-succinate dehydrogenase-SDH) changes in the energy metabolism of developing eggs of <i>A. suvm</i> were detected. Of the fungi species tested - <i>P. frequentans</i> caused the most extensive disorders in the processes of cellular oxidation, which were manifested in a decline of SDH activity during gastrulation. Incubation of eggs of Ascaris with mycelia of both fungi: <i>S. chartarum</i> and <i>P. frequentans</i> - in lesser extend affected respiratory metabolism in embryogenesis of this nematode.

The Effect of Saprotrophic Fungi on the Development and Hatching of <I>Fasciola hepatica</I> Eggs

“…The latter are related to the metabolic activity of fungi. Antagonism based on biochemical activity of fungi plays an important role in the bioregulation of populations of many hel- minths that are responsible for parasitoses in humans and animals (LÝSEK 1978;BASUALDO et al 2000;KO£ODZIEJCZYK et al 2001;KU NA-GRY-GIEL et al 2001a, 2001bCIARMELA et al 2002).…”

“…This dynamic system includes a number of interspecies interactions which determine the number and vitality of species. Populations of organisms, including helminth parasites of humans and animals, may be reduced via various forms of antagonisms, for example those involving micro-fungi (LÝSEK 1978;MIZGAJSKA 1994 (LÝSEK & KRAJÈI 1987;LÝSEK & ŠTÌRBA 1991;BASUALDO et al 2000;KO£ODZIEJCZYK et al 2001;KU NA-GRYGIEL et al 2001a, 2001bCIARMELA et al 2002;ARAÚJO et al 2008). The ovicidal effects of Pochonia chlamydosporia have also been observed in the eggs of other species; Trichuris vulpis (SILVA et al 2010), Toxocara vitulorum (BRAGA et al 2010) and Taenia saginata (ARAÚJO et al 2009).…”