In vitro evaluation of physicochemical variables on the nematophagous fungus Duddingtonia flagrans.

Autor: Céspedes-Gutiérrez E; Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA, Headquarters, Mosquera, Colombia., Aragón-Novoa DM; Universidad Nacional de Colombia, Bogotá, Colombia., Gómez-Álvarez MI; Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA, Headquarters, Mosquera, Colombia., Cortés-Rojas DF; Corporación Colombiana de Investigación Agropecuaria - AGROSAVIA, Headquarters, Mosquera, Colombia.
Jazyk: angličtina
Zdroj: Journal of basic microbiology [J Basic Microbiol] 2021 Jun; Vol. 61 (6), pp. 547-556. Date of Electronic Publication: 2021 Apr 14.
DOI: 10.1002/jobm.202100039
Abstrakt: Duddingtonia flagrans is a biological alternative to the use of anthelmintic drugs in ruminants. This fungus must be ingested by the animal, pass through the cavities of the digestive tract and reach the feces where it develops traps that capture the nematodes. The severe conditions encountered in this process negatively affect the fungus, which is reflected in the low recovery rates compared to the amount administered. The aim of this study was to evaluate independently the in vitro effect of typical physical and chemical conditions of the gastrointestinal cavities of ruminants on the concentration, viability, and the in vitro nematode predatory ability of the chlamydospores of D. flagrans. The factors evaluated individually were pH (2, 6, and 8), temperature (28 ± 2°C and 39 ± 2°C), exposure to artificial saliva, and milling. The results showed that the concentration and viability of D. flagrans were not affected by the action of pH, temperature, milling, or exposure to artificial saliva. Regarding the in vitro nematode predatory ability, a reduction was observed after the milling process and the exposure for 24 h at different pH.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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