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Dos Santos TAX, Fernandes LMG, Carvalho PPX, Júnior VSM, Fonseca SA, Chaves AS, Duarte ER. Performance and microbiota of the digestive tract of Nellore calves supplemented with fungi isolated from bovine rumen. Vet World 2021; 14:2686-2693. [PMID: 34903926 PMCID: PMC8654770 DOI: 10.14202/vetworld.2021.2686-2693] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
Background and Aim In tropical semiarid regions, supplementation with fungi could contribute to rumen modulation, promoting greater production of fibrolytic enzymes and degradation of forage. The objective of this study was to analyze the effect of supplementation with fungi, isolated from the bovine rumen, on the performance and microbiota of the digestive tract of Nellore calves. Materials and Methods The experiment was conducted in randomized blocks evaluating eight Nellore calves that were daily supplemented with isolates of Aspergillus terreus and Trichoderma longibrachiatum, along with eight calves that were not supplemented. After 55 days, the animals were weighed, and samples of rumen fluid and feces were collected for analysis. The characteristics that showed normal distribution were subjected to analysis of variance and compared using Tukey's test. Whereas, the variables that did not show normal distribution were subjected to the Kruskal-Wallis test, and the frequencies of the bacterial and fungal genera were compared using the Chi-square test. Results Supplementation with fungi promoted the reduction in ruminal pH (p<0.05). However, the final live weight; average daily weight gain; total weight gain; rumen protozoa; and the count of Enterobacteriaceae, mycelial fungi, and yeasts of ruminal fluid and feces were not influenced by supplementation (p>0.05). Moreover, the protozoa Eodinium spp. was identified only in supplemented calves (p<0.05). Conclusion Supplementation with the fungi presented the potential for use as possible additives because it did not alter the physiological parameters of the facultative anaerobic microbiota composition in the rumen and feces. In addition, it favored the presence of the ciliate genus Eodinium. However, further studies should be performed to better define suitable dosages for supplementation.
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Affiliation(s)
| | | | - Pedro Paulo Xavier Carvalho
- Institute of Agricultural Science, Universidade Federal de Minas Gerais, Campus Montes Claros - MG, 39404-547, Brazil
| | - Valdo Soares Martins Júnior
- Institute of Agricultural Science, Universidade Federal de Minas Gerais, Campus Montes Claros - MG, 39404-547, Brazil
| | - Suze Adriane Fonseca
- Institute of Agricultural Science, Universidade Federal de Minas Gerais, Campus Montes Claros - MG, 39404-547, Brazil
| | - Amalia Saturnino Chaves
- Department of Veterinary Medicine, Universidade Federal de Juiz de Fora, Juiz de Fora - MG, 36036-900, Brazil
| | - Eduardo Robson Duarte
- Institute of Agricultural Science, Universidade Federal de Minas Gerais, Campus Montes Claros - MG, 39404-547, Brazil
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Robson Duarte E, Duarte Matias A, Almeida Bastos G, Cordeiro Maia R, Soares Martins V, Maia Soares AC, Dos Santos Magaço F, de Oliveira NJF, Dos Santos TAX. Anthelmintic efficacy of trichlorfon and blood parameters of young lambs infected with Haemonchus contortus. Vet Parasitol 2019; 272:40-43. [PMID: 31395203 DOI: 10.1016/j.vetpar.2019.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 03/24/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 11/17/2022]
Abstract
In this study we evaluated the efficacy of trichlorfon against Haemonchus contortus, monitoring its influence on blood parameters and plasma enzymes of lambs with haemonchosis. A lamb group was orally treated with trichlorfon at 100 mg kg-1 while the other group was untreated. Split-plot design analysis was performed with the lamb groups defined as plots while the subplots were the four periods (weeks) of collection. The trichlorfon treatment promoted a significant and effective reduction of fecal egg counts after one week, with efficacies > 99%. After 21 days of treatment, detected blood parameters and serum levels of plasma enzymes were normal. Additionally, serum albumin and urea concentrations increased to normal values, which were not observed in untreated lambs. The treatment with this organophosphate, using a correct oral administration, may represent an effective therapeutic alternative for sheep infected with multi resistant strain of H. contortus.
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Affiliation(s)
- Eduardo Robson Duarte
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil.
| | - Abigair Duarte Matias
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Gabriela Almeida Bastos
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Roberta Cordeiro Maia
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Valdo Soares Martins
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Ana Cláudia Maia Soares
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Fernando Dos Santos Magaço
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Neide Judith Faria de Oliveira
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
| | - Thiago Alves Xavier Dos Santos
- Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais, Avenida Universitária, 1000, Bairro Universitário, Montes Claros, Minas Gerais, 39400-006, Brasil
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