Predatory viability of the nematophagous fungus Duddingtonia flagrans on the infective larvae of gastrointestinal nematodes of sheep following storage and refrigeration
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Vinícius Longo Ribeiro Vilela
Instituto Federal da Paraíba, Departamento de Medicina Veterinária, Sousa – PB, Brazil ; Universidade Federal de Campina Grande, Programa de Pós-graduação em Ciência Animal, Patos – PB, Brazil
https://orcid.org/0000-0001-9891-7842
- Paulo Wbiratan Loes da Costa Universidade Federal de Campina Grande, Programa de Pós-Graduação em Ciência Animal, Patos - PB, Brazil
- Francisca Flávia da Silva Universidade Federal de Campina Grande, Programa de Pós-Graduação em Medicina Veterinária, Patos - PB, Brazil
- Hermano Manoel Francisco Figueiredo Bezerra Universidade Federal da Paraíba, Departamento de Medicina Veterinária, Sousa – PB, Brazil
- Leonardo Vinicius Silva de Oliveira Universidade Federal da Paraíba, Departamento de Medicina Veterinária, Sousa – PB, Brazil
- Maysa de Oliveira Dantas Universidade Federal da Paraíba, Departamento de Medicina Veterinária, Sousa – PB, Brazil
- Thais Ferreira Feitosa Universidade Federal da Paraíba, Departamento de Medicina Veterinária, Sousa – PB, Brazil
- Jackson Victor de Araújo Universidade Federal de Viçosa, Departamento de Medicina Veterinária, Viçosa – MG, Brazil
- Fabio Ribeiro Braga Universidade Vila Velha, Departamento de Medicina Veterinária, Vila velha – ES, Brazil
Abstract
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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