Eficacia de tratamientos antihelmínticos selectivos frente a nematodos gastrointestinales en cabras del trópico bajo ecuatoriano

Ángelo Damián Véliz-Rumiguamo; Gema Anahi Zambrano-Mendoza; María Fernanda Lugo-Almarza; Kelvin Enrique Solórzano-Cadena; Francisco Javier Angulo-Cubillán

doi:10.56124/allpa.v9i18.0168

Authors

Véliz-Rumiguamo Ángelo Damián Universidad Técnica de Manabí (UTM), Facultad de Ciencias Veterinarias, Carrera de Medicina Veterinaria. Santa Ana, Ecuador. https://orcid.org/0009-0008-2370-7443
Zambrano-Mendoza Gema Anahi Universidad Técnica de Manabí (UTM), Facultad de Ciencias Veterinarias, Carrera de Medicina Veterinaria. Santa Ana, Ecuador. https://orcid.org/0009-0003-9921-9714
Lugo-Almarza María Fernanda Universidad Técnica de Manabí (UTM), Facultad de Posgrado, Maestría en Medicina Veterinaria Mención Salud y Reproducción de Especies Productivas. Portoviejo, Ecuador. https://orcid.org/0000-0003-1471-877X
Solórzano-Cadena Kelvin Enrique Universidad Técnica de Manabí (UTM), Facultad de Ciencias Veterinarias, Departamento de Medicina Veterinaria. Santa Ana, Ecuador. https://orcid.org/0009-0005-9063-8423
Angulo-Cubillán Francisco Javier Universidad Técnica de Manabí (UTM), Facultad de Ciencias Veterinarias, Departamento de Medicina Veterinaria. Santa Ana, Ecuador. https://orcid.org/0000-0001-5595-3704

DOI:

https://doi.org/10.56124/allpa.v9i18.0168

Keywords:

Gastrointestinal nematodes; targeted selective treatment; goats

Abstract

The aim of this study, was to evaluate the efficacy of different targeted selective anthelmintic treatment strategies and their effects on the parasite burden of gastrointestinal nematodes (GIN) in naturally infected goats from a commercial extensive production system in the Ecuadorian lowland tropics. 40 goats were included and randomly allocated, with adjustment according to their initial parasite burdens, into four experimental groups. G1 consisted of animals receiving continuous treatment every 30 days. G2 received targeted selective treatment based on parasite burden, with animals treated only when fecal egg counts exceeded 200 eggs per gram (EPG). G3 received targeted selective treatment based on mucous membrane color, with animals treated when their FAMACHA score was ≥3 on a scale from 1 to 5. The fourth group (G4) served as an untreated control. Fecal samples were collected directly from the rectum every 15 days, labeled, refrigerated, and transported to the Veterinary Parasitology Laboratory of the Universidad Técnica de Manabí, Ecuador. Samples were analyzed for parasitological diagnosis and fecal egg counts using the quantitative McMaster technique. No significant differences were observed either in EPG dynamics throughout the trial or in the efficacy of the evaluated treatment strategies. However, the experimental group treated according to mucous membrane color using the FAMACHA method showed lower EPG values and greater efficacy at the end of the trial. Overall, targeted selective treatment based on mucous membrane color reduced gastrointestinal nematode burdens in goats raised in the Ecuadorian lowland tropics.

Keywords: Gastrointestinal nematodes; targeted selective treatment; goats.

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References

Baudinette, E., O’Handley, R., & Trengove, C. (2022). Anthelmintic resistance of gastrointestinal nematodes in goats: A systematic review and meta-analysis. Veterinary Parasitology, 312, 109809. https://doi.org/10.1016/j.vetpar.2022.109809

Berk, Z., Laurenson, Y. C. S. M., Forbes, A. B., & Kyriazakis, I. (2016). Modelling the consequences of targeted selective treatment strategies on performance and emergence of anthelmintic resistance amongst grazing calves. International Journal for Parasitology: Drugs and Drug Resistance, 6(3), 258–271. https://doi.org/10.1016/j.ijpddr.2016.11.002

Chávez, D., Acosta, N., Duque, B., Quinteros, O. R., Andrade, V., & Lima, R. (2025). Producción caprina en Ecuador: Estado actual, comportamiento bioproductivo y perspectivas para el mejoramiento genético. Centro Agrícola, 52.

Gobierno Autónomo Descentralizado Parroquial Rural de Julcuy. (2024). Plan de desarrollo y ordenamiento territorial (PDOT) 2023–2027. https://gadpuertocayo.gob.ec/media/gadparroquiajulcuy/pdot_archivos/PDOT_PARROQUIA_JULCUY_2023-2027_compressed.pdf

Guinda, E. F. X., Afonso, S. M. S., Fiedler, S., Morgan, E. R., Mukine, S. B., Borchert, M., Atanásio, A., Capece, B. P. S., & Krücken, J. (2025). Efficacy of fenbendazole against gastrointestinal nematodes in naturally infected goats in Maputo Province, Mozambique using in vivo, in vitro and molecular assessment. International Journal for Parasitology: Drugs and Drug Resistance, 27, 100572. https://doi.org/10.1016/j.ijpddr.2024.100572

Kaplan, R. M., Denwood, M. J., Nielsen, M. K., Thamsborg, S. M., Torgerson, P. R., Gilleard, J. S., Dobson, R. J., Vercruysse, J., & Levecke, B. (2023). World Association for the Advancement of Veterinary Parasitology (W.A.A.V.P.) guideline for diagnosing anthelmintic resistance using the faecal egg count reduction test in ruminants, horses and swine. Veterinary Parasitology, 318, 109936. https://doi.org/10.1016/j.vetpar.2023.109936

Lu, C. D. (2023). The role of goats in the world: Society, science, and sustainability. Small Ruminant Research, 227, 107056. https://doi.org/10.1016/j.smallrumres.2023.107056

Mancilla-Montelongo, G., González-Pech, P. G., Miranda-Miranda, D. Y., Castañeda-Ramírez, G. S., Escalada-Medina, P., Can-Culhuac, A., Galera, I., Ortiz-Ocampo, G. I., & Torres-Acosta, J. F. J. (2023). Targeted treatment strategies for the control of gastrointestinal nematodes in a goat flock with anthelmintic resistant worm populations and poor nutrition. Small Ruminant Research, 227, 107062. https://doi.org/10.1016/j.smallrumres.2023.107062

Maurizio, A., Perrucci, S., Tamponi, C., Scala, A., Cassini, R., Rinaldi, L., & Bosco, A. (2023). Control of gastrointestinal helminths in small ruminants to prevent anthelmintic resistance: The Italian experience. Parasitology, 150(12), 1105–1118. https://doi.org/10.1017/S0031182023000343

Paras, K. L., George, M. M., Vidyashankar, A. N., & Kaplan, R. M. (2018). Comparison of fecal egg counting methods in four livestock species. Veterinary Parasitology, 257, 21–27. https://doi.org/10.1016/j.vetpar.2018.05.015

Scheuerle, M. C., Mahling, M., Muntwyler, J., & Pfister, K. (2010). The accuracy of the FAMACHA-method in detecting anaemia and haemonchosis in goat flocks in Switzerland under field conditions. Veterinary Parasitology, 170(1–2), 71–77. https://doi.org/10.1016/j.vetpar.2010.01.035

Thomas, M., & Syamala, K. (2025). Use of targeted selective treatment in the control of goat parasitism in humid tropics. Indian Journal of Veterinary and Animal Sciences Research, 44(5), 299–304. https://doi.org/10.56093/ijvasr.v44i5.173534

Torres-Acosta, J. F. J., Pérez-Cruz, M., Canul-Ku, H. L., Soto-Barrientos, N., Cámara-Sarmiento, R., Aguilar-Caballero, A. J., Lozano-Argáes, I., Le-Bigot, C., & Hoste, H. (2014). Building a combined targeted selective treatment scheme against gastrointestinal nematodes in tropical goats. Small Ruminant Research, 121, 27–35. https://doi.org/10.1016/j.smallrumres.2014.01.009

Zárate-Rendón, D. A., Rojas-Cairampoma, M., & Segura-Correa, J. C. (2017). Validación del método FAMACHA© para dosificación antihelmíntica selectiva en rebaños caprinos lecheros. Revista de Investigaciones Veterinarias del Perú, 28(1), 150–159. https://doi.org/10.15381/rivep.v28i1.12934