title: Using Duddingtonia flagrans in calves under an organic milk farm production system in the Mexican tropics.
abstract: The reduction of the gastrointestinal nematode (GIN) larvae population in faeces of cattle treated with Duddingtonia flagrans chlamydospores on a farm under an organic production system in Chiapas, Mexico, was assessed. Seventeen Cebu/Swiss crossbreed grazing calves naturally infected with GIN, were randomly distributed into two groups and treated as follows: Group 1, an oral administration of 2 × 106D. flagrans chlamydospores/kg BW, every two days for 30 days; group 2, Control, without any treatment. Results indicated that the epg values in both groups remained similar (p > 0.05). The average number of (L3) from coprocultures from the group treated with D. flagrans had an important reduction (53.8%) with respect to the control group and it reached 75.3% maximum larval reduction at the 14th sampling; although, no statistic significance was observed (p > 0.05). Likewise, the average of larvae (L3) recovered from grass corresponding to the animals treated with D. flagrans diminished at 25.1% with respect to the control group (p > 0.05). A mixture of GIN genera including Strongyloides sp., Haemonchus sp., Cooperia sp., Trichostrongylus sp., Oesophagostomum sp. and Mecistocirrus sp., were identified from coprocultures. It was concluded that treatment with D. flagrans chlamydospores reduces the GIN larvae population in grass and in faeces of calves maintained under an organic milk production system.
authors.affiliation: Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
authors.forename: Diego Otoniel
authors.initials: DO
authors.lastname: Ortiz Pérez
authors.affiliation: Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico. Electronic address: jbersam@gmail.com.
authors.forename: Bernardo
authors.initials: B
authors.lastname: Sánchez Muñoz
authors.affiliation: Departamento de Agroecología, El Colegio de la Frontera Sur, San Cristóbal de Las Casas, Chiapas, Mexico.
authors.forename: José
authors.initials: J
authors.lastname: Nahed Toral
authors.affiliation: Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
authors.forename: Miguel Ángel
authors.initials: MÁ
authors.lastname: Orantes Zebadúa
authors.affiliation: Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
authors.forename: José Luis
authors.initials: JL
authors.lastname: Cruz López
authors.affiliation: Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
authors.forename: María Eréndira
authors.initials: ME
authors.lastname: Reyes García
authors.affiliation: Departamento de Helmintología, Centro Nacional de Investigación Disciplinaria en Parasitología Veterinaria, INIFAP. Col. Progreso, Jiutepec, Morelos, Mexico. Electronic address: pedromdgives@yahoo.com.
authors.forename: Pedro
authors.initials: P
authors.lastname: Mendoza de Gives
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology / Q000517:prevention & control*; D003612:Dairying / Q000379:methods*; D059586:Duddingtonia; D005243:Feces / Q000469:parasitology; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000517:prevention & control / Q000662:veterinary*; D007814:Larva; D008297:Male; D008800:Mexico; D009349:Nematode Infections / Q000517:prevention & control / Q000662:veterinary*; D058871:Organic Agriculture / Q000379:methods*; D010270:Parasite Egg Count / Q000662:veterinary; D011897:Random Allocation; D013172:Spores, Fungal; D014329:Tropical Climate
keywords: Biological control; Gastrointestinal nematodes; Nematophagous fungi; Organic milk production