Duddingtonia flagrans: controle biológico de nematodeos de bovinos a campo

Jobim, Marta Bañolas; Santúrio, Jânio Morais; Rue, Mario Luiz de la

doi:10.1590/s0103-84782008000800026

Cited by 18 publications

(4 citation statements)

References 19 publications

(26 reference statements)

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“…Specifically, several studies have found that the activity of D. flagrans against Haemonchus contortus has promising results (Mendoza- De-Gives et al 1998;Paraud et al 2006;Peña et al 2002;Chandrawathani et al 2003). In addition, Jobim et al (2008) and Almeida et al (2012) found similar efficacy results in southern Brazil.…”

Section: Introductionsupporting

confidence: 53%

In vitro influence of temperature on the biological control activity of the fungus Duddingtonia flagrans against Haemonchus contortus in sheep

et al. 2012

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Recently, research for alternative methods to combat gastrointestinal parasites has increased, and the biological control activity of the fungus Duddingtonia flagrans stands out. In this study, the possible influence of temperature on the nematophagous activity of D. flagrans, after gastrointestinal passage, against Haemonchus contortus in sheep was analysed. Four female sheep, between 2 and 3 years of age and weighing between 40 and 50 kg, were used. Two sheep were parasitised with H. contortus, while two other sheep were dewormed. Before the collection of faeces, one of the dewormed animals received a dosage of 1 × 10(6) chlamydospores of D. flagrans, lyophilised in gelatin capsules, for three consecutive days. The faeces were collected with collector bags, mixed, and then separated as samples with (fungus; 800 eggs per gram (EPG) of faeces) or without fungus (control; 900 EPG). Each sample (five replicates) was maintained in a biochemical oxygen demand incubator under different temperatures (5, 10, 15, 20, 25, 30, or 35 °C) for 21 days, followed by determination of the larval recovery. Compared to the control group, the best temperature for fungal action was 30 °C, while no larvae were recovered at 5 °C. At 10 °C, fungal action was detected, yet there was no significant difference in the percent larval reduction between all temperatures, demonstrating that larval presence seems to be the main factor affecting the nematophagous action of D. flagrans. Temperature does not appear to be a limiting factor in the biological control activity of D. flagrans against H. contortus, but larval presence, which was not observed at 5 °C, is mandatory. At low temperatures, which are typically suboptimal conditions for fungal and larval development, the lyophilised D. flagrans reduced the number of H. contortus larvae, which demonstrates the biological control potential and the potential use of D. flagrans in the subtropics.

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Section: Introductionsupporting

confidence: 53%

In vitro influence of temperature on the biological control activity of the fungus Duddingtonia flagrans against Haemonchus contortus in sheep

et al. 2012

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“…Recent studies concluded that this species was efficient in controlling nematode parasites of sheep (Kahn et al 2007;Silva et al 2009), cattle (Dias et al 2007;Jobim et al 2008) and goats (Paraud et al 2007) in field conditions.…”

Section: Introductionmentioning

confidence: 99%

Predatory activity of the fungus Duddingtonia flagrans in equine strongyle infective larvae on natural pasture in the Southern Region of Brazil

et al. 2011

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Biological control is an alternative method to reduce the population of parasites through natural predators. A promising option of biological control in the reduction of infective larvae on pasture is the use of nematophagous fungi. In this study, the efficacy of the nematophagous fungus Duddingtonia flagrans in controlling gastrointestinal nematode parasites in field-raised horses was tested. Ten foals with an average age of 12 months were divided in two groups: five males constituted the treated group and five females constituted the control group. Each group was introduced in a field of mixed pasture with approximately 5 ha. The treated group received the fungus D. flagrans at a concentration of 10(6) chlamydospores per kilogramme of animal body weight daily, mixed with horse food for 5 months. The control group did not receive the fungus. Samples were collected to perform eggs per gramme (EPG) counts weekly. Coproculture and collection of pasture were done monthly for larvae counting. No significant difference was observed in the EPG counting and in the number of larvae recovered from coprocultures, where cyathostomines, Strongylus and Trichostrongylus spp. were found after monthly larvae counting. No significant difference was observed in the EPG counts, and Trichostrongylus sp. was identified. The number of recovered larvae on pasture was significantly lower in the treated group in the last month of treatment, showing a reduction of 73.5% (p < 0.05). As such, the fungus was able to reduce the number of infective larvae in the pasture. Nevertheless, this did not reflect in a decrease of parasitic infection during the 5-month study period.

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“…Duddingtonia flagrans has been widely studied, and there are already commercial products which allow the implementation of biological control for parasites in animal production [ 12 , 17 , 18 , 19 ]. The association between different species of fungi is important to expand the spectrum of action of fungal formulations, especially if the fungi act on different targets of the life cycle of the parasites [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Experimental Formulation Containing Duddingtonia flagrans and Pochonia chlamydosporia against Moniezia expansa Eggs

Ribeiro,

de Almeida Moura,

e Silva

et al. 2023

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This study aimed to evaluate the effectiveness of the experimental formulation containing chlamydospores of Duddingtonia flagrans and Pochonia chlamydosporia fungi, against Moniezia expansa. Two experiments were carried out. The first experiment evaluated the in vitro efficacy using 1 g of the experimental formulation (V1) added to 100 M. expansa eggs and the control (V2) (without the fungal formulation). Intact eggs or eggs with alterations were counted in order to evaluate their effectiveness. The second experiment evaluated the action of the fungal formulation on M. expansa eggs after passing through the gastrointestinal tract of goats. Three groups were identified as B1, B2, and B3, which received 1.0, 1.5 g of experimental fungal formulation, and placebo, respectively. In experiment 1, all the eggs in V1 were subjected to the predatory action of fungi, while in V2, the eggs remained intact. In experiment 2, the reduction of eggs in groups B1 and B2 were 49% and 57% 24 h after ingestion, 60% and 63% 48 h after, and 48% and 58% 72 h after. The predatory capacity against M. expansa eggs shown in the tests demonstrated that experimental fungal formulation has the potential to be used on integrated helminth control programs.

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Duddingtonia flagrans: controle biológico de nematodeos de bovinos a campo

Cited by 18 publications

References 19 publications

In vitro influence of temperature on the biological control activity of the fungus Duddingtonia flagrans against Haemonchus contortus in sheep

In vitro influence of temperature on the biological control activity of the fungus Duddingtonia flagrans against Haemonchus contortus in sheep

Predatory activity of the fungus Duddingtonia flagrans in equine strongyle infective larvae on natural pasture in the Southern Region of Brazil

Efficiency of Experimental Formulation Containing Duddingtonia flagrans and Pochonia chlamydosporia against Moniezia expansa Eggs

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