Abstract
Bioverm® (Duddingtonia flagrans) is a fungal formulation indicated for controlling gastrointestinal nematodes in ruminants and horses, which has recently been authorized for commercialization in Brazil. The objective was to determine the efficiency of Bioverm® against larvae of gastrointestinal nematodes after passage through the gastrointestinal tract of cattle. Twelve animals were used, divided into two groups. In the treated group, a single dose of 1 g of Bioverm® per 10 kg of live weight (containing 105 chlamydospores of D. flagrans) was provided for each animal. Fecal samples were obtained from the animals in each group at 12, 24, 36, 48, 60 and 72 hours after administration. In assay A, 2 g of feces were added to Petri dishes containing 2% agar-water medium. In assay B, coprocultures were performed. In both assays, the peak of larval predation occurred within 48 hours after administration of Bioverm®. In assay A, a significant larval reduction (P < 0.05) was seen at 48 h (88.2%). In assay B, significant reductions (P < 0.05) were seen at 36 h (43.7%) and 48 h (82.3%). Bioverm® showed high predatory capacity after passage through the gastrointestinal tract of cattle and was effective for controlling gastrointestinal nematodes.
Highlights
O Bioverm® (Duddingtonia flagrans) é uma formulação fúngica indicada para o controle de nematódeos gastrintestinais de ruminantes e equídeos, recentemente autorizado para a comercialização no Brasil
It has been found to be effective for controlling gastrointestinal helminths in animals (Larsen et al, 1992; Maciel et al, 2006; Braga et al, 2010; Braga & Araújo, 2014; Vilela et al, 2020). These advances in knowledge have led to development of a Brazilian biological control product called Bioverm® (GhenVet Saúde Animal Ltda.), which has been licensed for commercialization by the Ministry of Agriculture, Livestock and Supply (Ministério da Agricultura, Pecuária e Abastecimento, MAPA) under no
Similar results were found by Silva et al (2013), who found an 81.2% reduction in infective larvae, caused by the action of D. flagrans after passage through the gastrointestinal tract of cattle
Summary
O Bioverm® (Duddingtonia flagrans) é uma formulação fúngica indicada para o controle de nematódeos gastrintestinais de ruminantes e equídeos, recentemente autorizado para a comercialização no Brasil. Use of nematophagous fungi for biological control over gastrointestinal helminths in animals has been considered to be a promising alternative method. It has been found to be effective for controlling gastrointestinal helminths in animals (Larsen et al, 1992; Maciel et al, 2006; Braga et al, 2010; Braga & Araújo, 2014; Vilela et al, 2020).
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