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Junco M, Iglesias LE, Zegbi S, Sagués MF, Guerrero I, Bernat G, Fuentes ME, Riva E, Fernández AS, Saumell CA. Enhancing chlamydospore production in Duddingtonia flagrans on solid substrate: The impact of mannitol and varied cultivation conditions. Exp Parasitol 2024; 260:108725. [PMID: 38458554 DOI: 10.1016/j.exppara.2024.108725] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/19/2024] [Accepted: 02/27/2024] [Indexed: 03/10/2024]
Abstract
Duddingtonia flagrans is a nematophagous fungus which has shown promising results as a non-chemical parasitic control tool. The fungus disrupts the parasite's life cycle by trapping larvae in the environment through the networks generated from chlamydospores, thus preventing the reinfection of animals. One barrier to the development of a commercial product using this tool is the need to increase chlamydospore production in the laboratory for its administration to livestock. The purpose of this study was to evaluate the addition of mannitol to an enriched culture medium and the effect of adverse cultivation conditions on chlamydospore production. D. flagrans was cultivated on Petri dishes with corn agar for 4 weeks at 27 °C and 70% relative humidity (RH). Four groups were then formed, all with Sabouraud agar as a base, to which different growth inducers were added: GSA (glucose Sabouraud agar), GSA-MI (glucose Sabouraud agar + meso inositol), GSA-E (enriched glucose Sabouraud agar), and AE-M (enriched agar + mannitol). After 4 weeks, chlamydospores were recovered by washing the surface of each plate with distilled water and then quantified. The medium that yielded the highest amount of chlamydospores was subjected to different cultivation conditions: NC (normal conditions): 70% RH and 27 °C, AC (adverse conditions) 1: 20% RH and 40 °C, CA2: 60% RH and 27 °C, and CA3: 55% RH and 24 °C. It was determined that mannitol increases chlamydospore production (65x106 chlamydospores/plate), and when reducing humidity by 10% under cultivation conditions it resulted in an approximately 10% increase in chlamydospore production compared to the control group. These results suggest that the addition of polyols, as well as its cultivation under certain environmental conditions, can improve chlamydospore production on a laboratory scale.
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Affiliation(s)
- M Junco
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina.
| | - L E Iglesias
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - S Zegbi
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - M F Sagués
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - I Guerrero
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - G Bernat
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina
| | - M E Fuentes
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Departamento de Sanidad Animal y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - E Riva
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Departamento de Sanidad Animal y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - A S Fernández
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Departamento de Sanidad Animal y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
| | - C A Saumell
- Centro de Investigación Veterinaria de Tandil CIVETAN, UNCPBA-CICPBA-CONICET, Tandil, Buenos Aires, Argentina; Centro de Investigaciones en Sanidad Animal, Pública y Ambiental, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil, Buenos Aires, Argentina
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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