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Delmilho G, Bohland E, Stephanie N, Vaz CCPDE, Alvarez LRDE, Costa RLDDA. Evaluation of the supply of Duddingtonia flagrans for the control of gastrointestinal parasites in sheep. AN ACAD BRAS CIENC 2024; 96:e20220940. [PMID: 38451593 DOI: 10.1590/00013765202420220940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 07/09/2023] [Indexed: 03/08/2024] Open
Abstract
Parasitic resistance imposes alternative control methods, like nematophagous fungi. In this study, two experiments were conducted supplying Duddingtonia flagrans aiming to evaluate the biological control of parasites in sheep. In the first, 24 sheep naturally infected by gastrointestinal nematodes were allocated, in randomized blocks, following the treatments: control or treated group, 0.5g/animal product containing D. flagrans, chlamydospores. Weight, body score, Famacha©, egg count per gram of feces (EPG), and larval percentage were evaluated. In the second experiment, D. flagrans (0.25 and 0.5g product) was infested with manure, plus or not protein concentrate, in a completely randomized design. In both experiments the dose was intentionally lower than recommended. Recovery and larval identification were performed. The SAS analyzed the variables by the MIXED procedure, repeated measures in time. Weight, body score, hematocrit, and Famacha© did not show differences between treatments (p>0.05); however, EPG (p<0.001) and the percentage of larvae identified in coproculture were different. In the second experiment, the inclusion of the fungus did not influence the recovery of larvae (p>0.05). In both experiments, colonization and advancement of the fungus were visualized. Under the experimental conditions, the fungus D. flagrans was not effective in the biological control of parasitic infection in sheep.
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Affiliation(s)
- Gustavo Delmilho
- Centro de Pesquisa Animal Diversificada, Instituto de Zootecnia\Secretaria de Agricultura e Abastecimento - APTA, Rua Heitor Penteado, 56, 13380-011 Nova Odessa, SP, Brazil
| | - Elisabeth Bohland
- Universidade de Santo Amaro, Faculdade de Medicina Veterinaria, Rua Prof. Enéas de Siqueira Neto, 340, Jardim das Imbuias, 04829-300 São Paulo, SP, Brazil
| | - Nicole Stephanie
- Universidade de Santo Amaro, Faculdade de Medicina Veterinaria, Rua Prof. Enéas de Siqueira Neto, 340, Jardim das Imbuias, 04829-300 São Paulo, SP, Brazil
| | - Claudia C P DE Vaz
- Centro de Pesquisa Animal Diversificada, Instituto de Zootecnia\Secretaria de Agricultura e Abastecimento - APTA, Rua Heitor Penteado, 56, 13380-011 Nova Odessa, SP, Brazil
| | - Leyla R DE Alvarez
- Department of Animal and Dairy Sciences, Assistant Professor Extension & Research, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Ricardo L D DA Costa
- Centro de Pesquisa Animal Diversificada, Instituto de Zootecnia\Secretaria de Agricultura e Abastecimento - APTA, Rua Heitor Penteado, 56, 13380-011 Nova Odessa, SP, Brazil
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Gurgeira DN, Crisóstomo C, Sartori LVC, de Paz CCP, Delmilho G, Chay-Canul AJ, Bedoya HJN, Vega WHO, Bueno MS, da Costa RLD. Characteristics of growth, carcass and meat quality of sheep with different feed efficiency phenotypes. Meat Sci 2022; 194:108959. [PMID: 36084489 DOI: 10.1016/j.meatsci.2022.108959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022]
Abstract
The objective was to evaluate the performance, carcass and meat quality of 40 lambs classified by RFI (residual feed intake) and RIG (residual intake and gain). Dry matter intake (DMI) was recorded to calculate the RFI and RIG, classified as efficient, moderately or inefficient. After the confinement period, they were slaughtered and the carcass and meat quality were determined. The efficient animals had DMI scores of 0.700 RFI and 0.400 kg/d RIG, lower than the inefficient ones with similar weight gain. The RFI efficient animals showed greater shear force, without effect in the RIG classification. In general, the variables analyzed were not influenced by RFI or RIG. Efficiency measures do not affect the carcass and meat quality of sheep, but they do have the advantage of identifying animals with lower feed consumption, making the system more efficient. However, as the dataset is limited to fully assess the effects, this manuscript can be used as preliminary results for future studies.
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Affiliation(s)
| | - Charleni Crisóstomo
- Instituto de Zootecnia, Rua Heitor Penteado, 56, Nova Odessa, SP 13380-011, Brazil
| | | | | | - Gustavo Delmilho
- Instituto de Zootecnia, Rua Heitor Penteado, 56, Nova Odessa, SP 13380-011, Brazil
| | - Alfonso Juventino Chay-Canul
- Universidad Juárez Autónoma de Tabasco, Carretera Villahermosa-Teapa, km 25, R/A La Huasteca, Centro, Tabasco, C.P. 86280, Mexico
| | | | - Wilder Hernando Ortiz Vega
- Centro Universitário UNINTA, Rua. Antônio Rodrigues Magalhães, 359 - Dom Expedito, Sobral, CE 62050-100, Brazil
| | - Mauro Sartori Bueno
- Instituto de Zootecnia, Rua Heitor Penteado, 56, Nova Odessa, SP 13380-011, Brazil
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