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Junco M, Iglesias LE, Sagüés F, Zegbi S, Guerrero I, Saumell CA. A review of the use of Duddingtonia flagrans as a biological controller of strongylid nematodes in horses. Parasitol Res 2023; 122:357-368. [PMID: 36434316 DOI: 10.1007/s00436-022-07740-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/18/2022] [Indexed: 11/27/2022]
Abstract
In horses, the nematodes of the Strongylidae family are the most important due to their prevalence and pathogenicity. Sanitary plans include parasite control based on chemical anthelmintics. Among these, the benzimidazole compounds have been used since the 1960s to control the nematode Strongylus vulgaris. Its inappropriate use resulted in the development of resistance in parasites with a shorter biological cycle, such as the small strongyles. Currently, the genera that make up this group show widespread resistance to all chemical treatments available in veterinary medicine, except for macrocyclic lactones, where less effective action has been detected. The need to find alternative routes for its control is recognized. International organizations and markets are increasingly restrictive in the allowed levels of drugs in products of animal origin, so one of the drawbacks is the permanence of chemical compounds in tissues. Therefore, other tools not chemically based are proposed, such as the biological control of gastrointestinal nematodes. Various research groups around the world have carried out tests on the control capacity of the nematophagous fungus Duddingtonia flagrans against this group of parasites. The objective of this review is to compile the different tests that are available on biological control in this species, in in vivo and in vitro tests, and the possible incorporation of this tool as an alternative method of antiparasitic control in an integrated control scheme of parasites.
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Affiliation(s)
- Milagros Junco
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina. .,Environment and Health Applied Sciences Doctoral , Program (DCAAS) at UNICEN, Tandil, Argentina. .,Scientific Research Commission (CIC), Buenos Aires, Argentina.
| | - Lucia Emilia Iglesias
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina
| | - Federica Sagüés
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina
| | - Sara Zegbi
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina
| | - Ines Guerrero
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina
| | - Carlos Alfredo Saumell
- Centro de Investigación Veterinaria de Tandil (CIVETAN), Parasitología Y Enfermedades Parasitarias, UNCPBA-CICPBA-CONICET), Buenos Aires, Argentina
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Rodrigues JA, Roque FL, Álvares FBV, Silva ALPD, Lima EFD, Silva Filho GMD, Feitosa TF, Araújo JVD, Braga FR, Vilela VLR. Efficacy of a commercial fungal formulation containing Duddingtonia flagrans (Bioverm®) for controlling bovine gastrointestinal nematodes. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2021; 30:e026620. [PMID: 34076056 DOI: 10.1590/s1984-29612021025] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 03/02/2021] [Indexed: 11/22/2022]
Abstract
Bioverm® (Duddingtonia flagrans) is a fungal formulation indicated for controlling gastrointestinal nematodes in ruminants and horses, which has recently been authorized for commercialization in Brazil. The objective was to determine the efficiency of Bioverm® against larvae of gastrointestinal nematodes after passage through the gastrointestinal tract of cattle. Twelve animals were used, divided into two groups. In the treated group, a single dose of 1 g of Bioverm® per 10 kg of live weight (containing 105 chlamydospores of D. flagrans) was provided for each animal. Fecal samples were obtained from the animals in each group at 12, 24, 36, 48, 60 and 72 hours after administration. In assay A, 2 g of feces were added to Petri dishes containing 2% agar-water medium. In assay B, coprocultures were performed. In both assays, the peak of larval predation occurred within 48 hours after administration of Bioverm®. In assay A, a significant larval reduction (P < 0.05) was seen at 48 h (88.2%). In assay B, significant reductions (P < 0.05) were seen at 36 h (43.7%) and 48 h (82.3%). Bioverm® showed high predatory capacity after passage through the gastrointestinal tract of cattle and was effective for controlling gastrointestinal nematodes.
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Affiliation(s)
- Jossiara Abrante Rodrigues
- Programa de Pós-graduação em Ciência Animal e Saúde, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil
| | | | | | | | | | | | - Thais Ferreira Feitosa
- Departamento de Medicina Veterinária, Instituto Federal da Paraíba - IFPB, Sousa, PB, Brasil
| | | | - Fabio Ribeiro Braga
- Departamento de Medicina Veterinária, Universidade de Vila Velha - UVV, Vila Velha, ES, Brasil
| | - Vinícius Longo Ribeiro Vilela
- Programa de Pós-graduação em Ciência Animal e Saúde, Universidade Federal de Campina Grande - UFCG, Patos, PB, Brasil.,Departamento de Medicina Veterinária, Instituto Federal da Paraíba - IFPB, Sousa, PB, Brasil
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Formulation of the nematophagous fungus Duddingtonia flagrans in the control of equine gastrointestinal parasitic nematodes. Vet Parasitol 2021; 295:109458. [PMID: 34029852 DOI: 10.1016/j.vetpar.2021.109458] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 11/24/2022]
Abstract
Equine gastrointestinal nematodiosis contributes to the lower productivity of these animals. There are growing reports of the emergence of nematodes resistant to the drugs used for decades in anthelmintic treatments. An alternative to the emergence of resistance may be the use of nematophagous fungi as a complementary method of treatment. Therefore, the objective was to evaluate the effects of the use of the product Bioverm® as a carrier of Duddingtonia flagrans, on pasture contamination level and equine parasitic burden. Sixteen mares were used, divided into two groups, one control and one treated, in which the treated animals received a dose of 1 g of Bioverm®, containing 105 chlamydospores per gram of the commercial product for each 10 kg of body weight, per day, for six months. Efficacy was evaluated by count of eggs per gram of faeces (EPG), coproculture and larval count on pastures and its correlation with climate, as well as weight gain evaluation. During the study, a significant influence of the formulation on weight gain and EPG was observed. The recovery of larvae from coprocultures revealed the predominance of small over large strongyles. There was a significant difference (p < 0.05) between the averages of the number of larvae of small strongyles recovered in the pasture at a distance of 0-20 cm from the faeces of treated and control groups. A correlation was also observed between the number of larvae recovered from the pasture and the average temperature during the experimental period, mainly in August and September. The ingestion of Bioverm® enhances the biological control of gastrointestinal nematodes of pasturing horses.
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Bampidis V, Azimonti G, de Lourdes Bastos M, Christensen H, Dusemund B, Kos Durjava M, Kouba M, López‐Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Sanz Y, Villa RE, Woutersen R, Chesson A, Cocconcelli PS, Rychen G, Wallace J, Galobart J, Innocenti ML, Brozzi R, Saarela M. Safety and efficacy of BioWorma ® ( Duddingtonia flagrans NCIMB 30336) as a feed additive for all grazing animals. EFSA J 2020; 18:e06208. [PMID: 32714465 PMCID: PMC7376537 DOI: 10.2903/j.efsa.2020.6208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Following a request from the European Commission, the EFSA Panel on Additives and products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the safety and efficacy of BioWorma® (Duddingtonia flagrans NCIMB 30336) when used as a zootechnical feed additive for all grazing animals. Duddingtonia flagrans belongs to a group of nematophagous fungi that physically entrap nematodes through an adhesive hyphal net. The additive contains the fungus in the form of chlamydospores and is intended to control pathogenic nematodes on pasture, with subsequent benefits for grazing animals. No conclusions could be drawn on the safety for the target species due to lack of data. ■■■■■ As it is not possible to exclude the presence of secondary metabolites (other than flagranones) produced during fermentation and their potential carry-over into animal products, safety for the consumer could not be established. The Panel concluded that the additive is not irritant to skin and eyes but is irritant to the respiratory tract and a respiratory sensitiser. No conclusion could be drawn on its skin sensitisation potential. Since D. flagrans is a naturally inhabiting soil organism of world-wide distribution, the Panel considered that use of an additive based on this organism does not pose a risk for the environment under the intended conditions of use. The strain under application reduced the number of parasitic nematodes on pasture to the benefit of grazing animals when used at the recommended application rate of 3 × 104 chlamydospores/kg bodyweight and day.
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Canhão-Dias M, Paz-Silva A, Madeira de Carvalho LM. The efficacy of predatory fungi on the control of gastrointestinal parasites in domestic and wild animals-A systematic review. Vet Parasitol 2020; 283:109173. [PMID: 32634679 DOI: 10.1016/j.vetpar.2020.109173] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND Gastrointestinal parasites like nematodes are associated with significant impacts on animal health, causing poor growth rates, diseases and even death. Traditional parasite control includes the use of anthelmintic drugs, albeit being associated with drug resistance and ecotoxicity. In the last decade, biological control of parasites using nematophagous or predatory fungi has been increasingly studied, although systematic evidence of its efficacy is still lacking. The aim of this work was to assess the evidence of efficacy of nematophagous fungi in the control of nematodes and other gastrointestinal parasites in different animal species. METHODS Using the PICO method (Population, Intervention, Comparison and Outcomes), we performed a systematic review on the subject to search for original papers published between January 2006 and October 2019, written in English, and indexed in PubMed/Medline. Medical Subject Headings (MeSH) terms were used in the syntax. Papers were selected for detailed review based on title and abstract. Inclusion and exclusion criteria were applied, and relevant data were collected from the remaining papers. RESULTS The literature search retrieved 616 papers. Eighty-nine were submitted to a detailed review. In the end, 53 papers were included in the analysis. The studies were very heterogeneous, using different fungi, doses, frequency of administration, duration of treatment, host animals, and target parasites. Considering the 53 papers, 44 studies (83 % of the interventions) showed efficacy, with only 9 studies (17 %) showing no significant differences when compared to control. CONCLUSION With the increasing hazards of drug resistance and ecotoxicity, biological control with predatory fungi stands out as a good tool for future parasite management, whether as a complementary treatment or as an alternative to standard parasite control.
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Affiliation(s)
- M Canhão-Dias
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
| | - A Paz-Silva
- Control of Parasites Group (COPAR, GI-2120), Department of Animal Pathology, Faculty of Veterinary, University of Santiago de Compostela, Lugo, Spain
| | - L M Madeira de Carvalho
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal.
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Buzatti A, Santos C, Fernandes M, Yoshitani U, Sprenger L, Molento M. Duddingtonia flagrans no controle de nematoides gastrintestinais de equinos em fases de vida livre. ARQ BRAS MED VET ZOO 2017. [DOI: 10.1590/1678-4162-9028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO O objetivo deste estudo foi avaliar a atividade predatória do fungo Duddingtonia flagrans contra larvas infectantes (L3) de nematoides gastrintestinais na pastagem e no bolo fecal de equinos, em um período de 21 dias. O delineamento experimental foi inteiramente ao acaso, com três grupos tratados (G1, G2 e G3) e um controle (C), com oito animais/grupo. Os tratados receberam 1,5x105; 3x105 e 6x105 clamidósporos de D. flagrans/kg-1peso vivo animal, G1, G2 e G3, respectivamente, durante 21 dias, com administração a cada três dias. Foram delimitadas 36 áreas de 1m2 cada, equivalendo a repetições em triplicata para cada grupo. As fezes foram coletadas dos animais nos dias 0 (D0), 15 (D15) e 30 (D30 = sete dias após a última administração dos tratamentos) e depositadas nessas áreas de pastagem. O número de larvas presentes nos bolos fecais e na pastagem foi avaliado após 14 e 21 dias de cada etapa de deposição. A avaliação da atividade predatória de D. flagrans na pastagem e nos bolos fecais demonstrou que a redução do número de L3 nos bolos fecais foi acompanhada pelo aumento da variável na pastagem. Não se constatou diferença significativa entre os grupos avaliados em decorrência da temperatura média registrada durante o período. As avaliações realizadas em um curto período podem ser insuficientes para a avaliação do efeito do fungo.
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Affiliation(s)
| | - C.P. Santos
- Universidade Estadual do Norte Fluminense, Brazil
| | | | | | | | - M.B. Molento
- Universidade Federal do Paraná, Brazil; Instituto Nacional de Ciência e Tecnologia-Pecuária, Brasil
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Zhao H, Qiao J, Meng Q, Gong S, Chen C, Liu T, Tian L, Cai X, Luo J, Chen C. Expression of serine proteinase P186 of Arthrobotrys oligospora and analysis of its nematode-degrading activity. Antonie van Leeuwenhoek 2015; 108:1485-1494. [PMID: 26419902 DOI: 10.1007/s10482-015-0595-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 09/21/2015] [Indexed: 11/25/2022]
Abstract
The nematode-trapping fungi possess a unique capability of predating and invading nematodes. As a representative nematode-trapping fungus, Arthrobotrys oligospora has been widely used to study the interactions between nematode-trapping fungi and their hosts. Serine proteinase is one of the important virulence factors during process of invasion of the nematode-trapping fungi into nematodes. In this study, using reverse transcription polymerase chain reaction, we amplified the gene sequence of serine proteinase 186 from A. oligospora, cloned it into pPIC9K vector and expressed it in the yeast Pichia pastoris. The expressed recombinant serine proteinase186 (reP186) was purified via Ni-affinity chromatography. The in vitro nematode-degrading activity of reP186 was analyzed. Sodium dodecyl sulfate polyacrylamide gel electrophoresis and Western blot analysis revealed that reP186 with molecular weight of 33 kDa was successfully obtained. ReP186 was capable of degrading a series of protein substrates including casein, gelatin, bovine serum albumin, denatured collagen and nematode cortical layer. The reP186 exhibited the maximal activity at pH 8.0 and 55 °C and was highly sensitive to the inhibitor, phenylmethanesulfonylfluoride. Treatment of Caenorhabditis elegans and Haemonchus contortus with reP186 for 12, 24 and 36 h, respectively, resulted in 62, 88 and 100 % of killing rates for C. elegans, and 52, 65 and 84 % of killing rates for H. contortus, respectively, indicating a relatively strong nematode-degrading bioactivity of reP186.
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Affiliation(s)
- Hailong Zhao
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Jun Qiao
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Qingling Meng
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China.
| | - Shasha Gong
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Cheng Chen
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Tianli Liu
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Lulu Tian
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
| | - Xuepeng Cai
- State Key Lab of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Jianxun Luo
- State Key Lab of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Chuangfu Chen
- Key Laboratory of Control and Prevention of Animal Disease of Xinjiang Production & Construction Corps, College of Animal Science and Technology, Shihezi University, North Street No.4, Shihezi, 832003, Xinjiang, China
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Braga FR, Soares FEF, Giuberti TZ, Lopes ADCG, Lacerda T, Ayupe TDH, Queiroz PV, Gouveia ADS, Pinheiro L, Araújo AL, Queiroz JH, Araújo JV. Nematocidal activity of extracellular enzymes produced by the nematophagous fungus Duddingtonia flagrans on cyathostomin infective larvae. Vet Parasitol 2015; 212:214-8. [PMID: 26319197 DOI: 10.1016/j.vetpar.2015.08.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 08/13/2015] [Accepted: 08/16/2015] [Indexed: 11/30/2022]
Abstract
Duddingtonia flagrans produces chitinases, however, optimization of the production of these enzymes still needs to be explored, and its nematocidal activity should still be the subject of studies. The objective of the present study was to optimize chitinase production, and evaluate the nematocidal activity of extracellular enzymes produced by the nematophagous fungus D. flagrans on cyathostomin infective larvae. An isolate from D. flagrans (AC001) was used in this study. For the production of enzymes (protease and chitinase), two different culture media were inoculated with AC001 conidia. Both enzymes were purified. The statistical Plackett-Burman factorial design was used to investigate some variables and their effect on the production of chitinases by D. flagrans. After that, the design central composite (CCD) was used in order to determine the optimum levels and investigate the interactions of these variables previously observed. Only two variables (moisture and incubation time), in the evaluated levels, had a significant effect (p<0.05) on chitinase production. The conditions of maximum chitinase activity were calculated, with the following values: incubation time 2 days, and moisture 511%. The protease and chitinase derived from D. flagrans, individually or together (after 24h), led to a significant reduction (p<0.01) in the number of intact cyathostomin L3, when compared to the control, with following reduction percentage values: 19.4% (protease), 15.5% (chitinase), and 20.5% (protease+chitinase). Significant differences were observed (p<0.05) between the group treated with proteases in relation to the group treated with proteases+chitinases. In this study, the assay with the cyathostomins showed that chitinase had a nematocidal effect, suggesting that this enzyme acts on the "fungus versus nematodes" infection process. It is known that nematode eggs are rich in chitin, and in this case, we could think of a greater employability for this chitinase.
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Affiliation(s)
- Fabio Ribeiro Braga
- Department of Parasitology, University of VilaVelha-ES, VilaVelha, ES CEP: 29102206, Brazil
| | | | - Thais Zanotti Giuberti
- Department of Parasitology, University of VilaVelha-ES, VilaVelha, ES CEP: 29102206, Brazil
| | | | - Tracy Lacerda
- Department of Parasitology, University of VilaVelha-ES, VilaVelha, ES CEP: 29102206, Brazil
| | | | - Paula Viana Queiroz
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG 36570-000, Brazil
| | - Angélica de Souza Gouveia
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG 36570-000, Brazil
| | - Larissa Pinheiro
- Department of Parasitology, University of VilaVelha-ES, VilaVelha, ES CEP: 29102206, Brazil
| | - Andreia Luíza Araújo
- Department of Parasitology, University of VilaVelha-ES, VilaVelha, ES CEP: 29102206, Brazil
| | - José Humberto Queiroz
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG 36570-000, Brazil
| | - Jackson Victor Araújo
- Department of Veterinary Medicine, Federal University of Viçosa, Viçosa, MG CEP: 3657000, Brazil
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Hugo LAG, Filippe EDFS, Joss HDQ, Angelica DSG, Jackson VA, Fabio RB, Iara RP, Maria CMK. Activity of the fungus Pleurotus ostreatus and of its proteases on Panagrellus sp. larvae. ACTA ACUST UNITED AC 2015. [DOI: 10.5897/ajb2015.14447] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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10
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Braga FR, Araújo JVD, Soares FEDF, Araujo JM, Ferreira SR, Tavela ADO, Silveira WFD, Queiroz JHD. Proteolytic action of the crude extract of Duddingtonia flagrans on cyathostomins (Nematoda: Cyathostominae) in coprocultures. ACTA ACUST UNITED AC 2015; 22:143-6. [PMID: 24252960 DOI: 10.1590/s1984-29612013000100026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 05/10/2012] [Indexed: 11/22/2022]
Abstract
The objective of this study was to examine the action of the crude extract of Duddingtonia flagrans (isolates AC001 and CG722) on infective larvae (L3) of cyathostomins in coprocultures and to confirm its proteolytic activity by means of a zymogram. The following groups were formed in coprocultures: Group 1: 10 mL of crude extract of D. flagrans (AC001); group 2: 10 mL of crude extract of AC001 with 10 mM of Ca2+; group 3: 10 mL of crude extract of D. flagrans (CG722); group 4: 10 mL of crude extract of CG722 with 10 mM of Ca2+; and group 5: control group (distilled water). The third-stage larvae (L3) were obtained after eight days. The crude extract of D. flagrans was effective in reducing the number of L3, with the following percentage reductions: group 1, 49.5%; group 2, 52.5%; group 3, 36.8%; and group 4, 57.7%; in relation to the control group (p > 0.05). The proteolytic activity of the crude extract was confirmed through the zymogram. The results from this study confirmed that the crude extract of the fungus D. flagrans could be used for controlling cyathostomin L3, and suggested that at least one protease of approximately 38 kDa was present.
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Braga FR, Araújo JV, Tavela ADO, Vilela VLR, Soares FEDF, Araujo JM, Magalhães LQ, Silveira WFD, Feitosa TF, Dantas ES, Atahyde ACR. First report of interaction of nematophagous fungi onLibyostrongylus douglassii (Nematoda: Trichostrongylidae). REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2013; 22:147-51. [DOI: 10.1590/s1984-29612013000100027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 05/11/2012] [Indexed: 11/21/2022]
Abstract
Libyostrongylus douglassii is a gastrointestinal nematode parasite of ostriches that can cause up to 50% mortality in young birds. The objective of this study was to compare the predatory capacity of two isolates of the predatory fungi Duddingtonia flagrans(AC001 and CG722 isolates) and one of Arthrobotrys cladodes (CG719) on infective larvae (L3) of L. douglassii under laboratory conditions, in 2% water-agar medium. The results showed that the fungi tested were effective in preying upon the L3 of L. douglassii (P < 0.05), compared with the control group. However, there was no difference in predatory capacity between the fungi tested (P > 0.05) during the seven days of experimental testing. In comparison with the control, without fungus, there were significant decreases (P < 0.05) of 85.2% (AC001), 81.2% (CG722) and 89.2% (CG719) in the average numbers of L3 of L. douglassii recovered from treatments with the isolates tested. In the present study, the three isolates of the predatory fungi D. flagrans (AC001 and CG722) andA. cladodes (CG719) were efficient at in vitro destruction of the L3 of L. douglassii.
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Affiliation(s)
- Fabio Ribeiro Braga
- Universidade Federal de Viçosa – UFV, Brasil; Universidade Vila Velha – UVV, Brasil
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Braga FR, Araújo JV, Araujo JM, Tavela ADO, Ferreira SR, Freitas Soares FE, Benjamin LDA, Frassy LN. Influence of the preservation period in silica-gel on the predatory activity of the isolates of Duddingtonia flagrans on infective larvae of cyathostomins (Nematoda: Cyathostominae). Exp Parasitol 2011; 128:460-3. [DOI: 10.1016/j.exppara.2011.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 05/12/2011] [Accepted: 05/16/2011] [Indexed: 11/26/2022]
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13
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In vitro predatory activity of nematophagous fungi Duddingtonia flagrans on infective larvae of Oesophagostomum spp. after passing through gastrointestinal tract of pigs. Trop Anim Health Prod 2011; 43:1589-93. [DOI: 10.1007/s11250-011-9848-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2011] [Indexed: 10/18/2022]
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