Morphological variability, molecular phylogeny, and biological characteristics of the nematophagous fungus Duddingtonia flagrans

Sheep production has serious problems due to the spread of intestinal parasites. These parasites cause loss of appetite, maldigestion, slow growth in body weight and wool, all of which results in economic losses as well. The control measures of infestation with strongyloid parasites in ruminants have until now been based mainly on the organization of grazing and the use of antihelmintics. However, due to the occurrence of resistance, alternative methods of control have been introduced. The use of nematophagous fungus Duddingtonia flagrans, which is capable of decreasing the number of infectious larvae and eggs in feces, has been successful. The aim of this study was to determine whether Duddingtonia flagrans decreases the number of eggs of Trichostrongylus spp in sheep feces. Fecal samples of thirty-four sheep were examined and the parasites were found in twelve sheep, six of which were fed with the fungus, and six of which were used as the control. According to ?2 test, at the level of certainty of p<0,005, a statistically important difference in the number of eggs was observed between the sheep which were given the fungus and those which were not.

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Predatory viability of the nematophagous fungus Duddingtonia flagrans on the infective larvae of gastrointestinal nematodes of sheep following storage and refrigeration

Brazilian Journal of Veterinary Research and Animal Science ◽

10.11606/issn.1678-4456.bjvras.2019.154252 ◽

2019 ◽

Vol 56 (3) ◽

pp. e154252 ◽

Cited By ~ 1

Author(s):

Vinícius Longo Ribeiro Vilela ◽

Paulo Wbiratan Loes da Costa ◽

Francisca Flávia da Silva ◽

Hermano Manoel Francisco Figueiredo Bezerra ◽

Leonardo Vinicius Silva de Oliveira ◽

...

Keyword(s):

Sodium Alginate ◽

Gastrointestinal Nematodes ◽

Nematophagous Fungus ◽

Control Group ◽

Duddingtonia Flagrans ◽

Animal Group ◽

Infective Larvae ◽

Group I ◽

Group Ii ◽

Alginate Matrix

The objective of this study was to evaluate the in vivo predatory viability of the nematophagous fungus, Duddingtonia flagrans, after storage (36 months) and refrigeration (2-8 °C). This viability was evaluated using the infective larvae of gastrointestinal nematodes of sheep in the Northeastern semi-arid region of Brazil. Sixteen Santa Inês sheep with negative counting of eggs per gram of feces (EPG) were divided into four experimental groups, each group comprised of four animals. The pellets were administered at the dose of 3 g/10 kg of live weight (20% fungal micelyum), and a single administration was performed for each animal. Group I was administered pellets that had been stored for 36 months; Group II, freshly produced pellets; Group III, freshly produced pellets that did not contain fungi; and Group IV, pellets were not administered, and this was the control group. Feces were collected for 5 days, every 24 h for analysis. There was a significant decrease in the number of infective larvae of sheep nematodes that received D. flagrans pellets in a sodium alginate matrix, 82% was observed for Group I and 71% for Group II, compared to the control group. It is therefore concluded that the fungus, D. flagrans, pelleted in sodium alginate matrix after 36 months of storage at 2-8 °C, showed efficacy in reducing the number of infective larvae of gastrointestinal nematodes of sheep.

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Morphological variability and molecular phylogeny of the nematophagous fungusMonacrosporium drechsleri

Mycologia ◽

10.1080/15572536.2006.11832816 ◽

2005 ◽

Vol 97 (2) ◽

pp. 405-415 ◽

Cited By ~ 3

Author(s):

Susan L.F. Meyer ◽

Lynn K. Carta ◽

Stephen A. Rehner

Keyword(s):

Molecular Phylogeny ◽

Morphological Variability

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