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The diagnosis of poisoning was confirmed in all cases by detecting methomyl in gastric contents using gas chromatography\u2013mass spectrometry. Differential diagnoses include poisoning by organophosphates, coumarin rodenticides, and sodium fluoroacetate, which share clinical and pathology features but differ in pathogenesis. Additionally, we conducted a review of the literature on methomyl poisoning in animals focused on pathogenesis, clinical signs, lesions, and diagnosis.<\/jats:p>","DOI":"10.1177\/10406387261484039","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T11:40:23Z","timestamp":1789126823000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Methomyl poisoning in dogs: report of 5 cases and literature review"],"prefix":"10.1177","author":[{"given":"Juan Diego","family":"Hidalgo-Dittel","sequence":"first","affiliation":[{"name":"Servicio de Patolog\u00eda Diagn\u00f3stica, C\u00e1tedra de Patolog\u00eda e Histolog\u00eda, Escuela de Medicina y Cirug\u00eda Veterinaria San Francisco de As\u00eds, Universidad Veritas, V\u00e1zquez de Coronado, San Jos\u00e9, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paula","family":"Pe\u00f1a-\u00c1lvarez","sequence":"additional","affiliation":[{"name":"Servicio de Patolog\u00eda Diagn\u00f3stica, C\u00e1tedra de Patolog\u00eda e Histolog\u00eda, Escuela de Medicina y Cirug\u00eda Veterinaria San Francisco de As\u00eds, Universidad Veritas, V\u00e1zquez de Coronado, San Jos\u00e9, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shirley","family":"Calder\u00f3n-Morera","sequence":"additional","affiliation":[{"name":"Secci\u00f3n Especializada Contra Delitos Medioambientales, Departamento de Ciencias Forenses, Organismo de Investigaci\u00f3n Judicial, San Joaqu\u00edn de Flores, Heredia, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steeven","family":"Paniagua-Mora","sequence":"additional","affiliation":[{"name":"Secci\u00f3n Especializada Contra Delitos Medioambientales, Departamento de Ciencias Forenses, Organismo de Investigaci\u00f3n Judicial, San Joaqu\u00edn de Flores, Heredia, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diego","family":"Arias-Alfaro","sequence":"additional","affiliation":[{"name":"Secci\u00f3n de Toxicolog\u00eda, Departamento de Ciencias Forenses, Organismo de Investigaci\u00f3n Judicial, San Joaqu\u00edn de Flores, Heredia, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diego S.","family":"Z\u00fa\u00f1iga-Cort\u00e9s","sequence":"additional","affiliation":[{"name":"Servicio de Patolog\u00eda Diagn\u00f3stica, C\u00e1tedra de Patolog\u00eda e Histolog\u00eda, Escuela de Medicina y Cirug\u00eda Veterinaria San Francisco de As\u00eds, Universidad Veritas, V\u00e1zquez de Coronado, San Jos\u00e9, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6178-4801","authenticated-orcid":false,"given":"Javier","family":"Asin","sequence":"additional","affiliation":[{"name":"California Animal Health &amp; Food Safety Laboratory System San Bernardino Branch, School of Veterinary Medicine, University of California\u2013Davis, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0681-1878","authenticated-orcid":false,"given":"Francisco A.","family":"Uzal","sequence":"additional","affiliation":[{"name":"California Animal Health &amp; Food Safety Laboratory System San Bernardino Branch, School of Veterinary Medicine, University of California\u2013Davis, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2740-1010","authenticated-orcid":false,"given":"Nicolas","family":"Streitenberger","sequence":"additional","affiliation":[{"name":"California Animal Health &amp; Food Safety Laboratory System San Bernardino Branch, School of Veterinary Medicine, University of California\u2013Davis, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6513-0111","authenticated-orcid":false,"given":"Laura G.","family":"Bass","sequence":"additional","affiliation":[{"name":"Servicio de Patolog\u00eda Diagn\u00f3stica, C\u00e1tedra de Patolog\u00eda e Histolog\u00eda, Escuela de Medicina y Cirug\u00eda Veterinaria San Francisco de As\u00eds, Universidad Veritas, V\u00e1zquez de Coronado, San Jos\u00e9, Costa Rica"},{"name":"California Animal Health &amp; Food Safety Laboratory System San Bernardino Branch, School of Veterinary Medicine, University of California\u2013Davis, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3711-0521","authenticated-orcid":false,"given":"Roberto W. 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