{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T05:40:14Z","timestamp":1780638014257,"version":"3.54.1"},"reference-count":43,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2022,4,11]],"date-time":"2022-04-11T00:00:00Z","timestamp":1649635200000},"content-version":"unspecified","delay-in-days":100,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2022]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This study aimed to describe the shedding pattern of gastrointestinal parasite eggs by a wild population of desert bighorn sheep (DBS;<jats:italic>Ovis canadensis<\/jats:italic>) in northern Mexico. Seventy-five fresh faecal samples were collected from the ground in each season within an hour after being expelled by these animals. The generalized linear mixed model showed that eggs per gram of faeces were highest in winter (577 \u00b1 399) and lowest in summer (260 \u00b1 198). Generalized linear models revealed that<jats:italic>Strongyloides<\/jats:italic>spp. predominated during most seasons with a peak in summer (85% of faecal samples analysed) and the absence of this helminth in winter.<jats:italic>Nematodirus<\/jats:italic>spp. was another helminth present in three seasons, with the presence of this nematode in 35% of the faecal samples in spring and 0% in summer. Other parasites in DBS faeces included<jats:italic>Bunostomun<\/jats:italic>spp.,<jats:italic>Trichostrongylus<\/jats:italic>spp.,<jats:italic>Cooperia<\/jats:italic>spp.,<jats:italic>Mecistocirrus digitatus<\/jats:italic>,<jats:italic>Haemonchus contortus<\/jats:italic>,<jats:italic>Chabertia ovina<\/jats:italic>and<jats:italic>Eimeria ovinoidalis<\/jats:italic>. There were differences among seasons in the percentage of these helminths and coccidia in faecal samples for all these parasites. It was concluded that helminths egg output in DBS in a semi-arid rangeland is lowest in summer and spring and highest in autumn and winter. Furthermore, it was shown that DBS in the study site do not suffer from severe parasite burden. Therefore, this nematode parasite burden is compatible with the conservation and well-being of this particular population.<\/jats:p>","DOI":"10.1017\/s0022149x22000207","type":"journal-article","created":{"date-parts":[[2022,4,11]],"date-time":"2022-04-11T10:02:06Z","timestamp":1649671326000},"source":"Crossref","is-referenced-by-count":3,"title":["Seasonal prevalence of gastrointestinal parasites in desert bighorn sheep (<i>Ovis canadensis<\/i>) in northern Mexico"],"prefix":"10.1017","volume":"96","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0612-7040","authenticated-orcid":false,"given":"J.E.","family":"Garc\u00eda","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3369-4582","authenticated-orcid":false,"given":"F.A.","family":"Rodriguez-Huerta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8853-8590","authenticated-orcid":false,"given":"E.A.","family":"Lozano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2758-1197","authenticated-orcid":false,"given":"J.","family":"Encina","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3341-0060","authenticated-orcid":false,"given":"M.","family":"Mellado","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2022,4,11]]},"reference":[{"key":"S0022149X22000207_ref43","doi-asserted-by":"publisher","DOI":"10.1186\/1751-0147-42-31"},{"key":"S0022149X22000207_ref20","doi-asserted-by":"publisher","DOI":"10.2193\/2009-292"},{"key":"S0022149X22000207_ref8","first-page":"57","article-title":"Prevalence of gastrointestinal helminth infection in Garole sheep of sundarban delta in West Bengal","volume":"8","author":"Brahma","year":"2018","journal-title":"Journal of Animal Research"},{"key":"S0022149X22000207_ref32","doi-asserted-by":"publisher","DOI":"10.5455\/javar.2017.d224"},{"key":"S0022149X22000207_ref9","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2018.10.004"},{"key":"S0022149X22000207_ref13","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182006000618"},{"key":"S0022149X22000207_ref25","doi-asserted-by":"publisher","DOI":"10.7589\/0090-3558-13.2.125"},{"key":"S0022149X22000207_ref34","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijpara.2019.06.008"},{"key":"S0022149X22000207_ref38","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2006.08.026"},{"key":"S0022149X22000207_ref1","first-page":"359","article-title":"Epidemiology of helminth parasites of West African Dwarf Goat (Capra hircus) in Umuariaga in Ikwuano LGA, Abia State","volume":"16","author":"Amadi","year":"2012","journal-title":"Journal of Applied Science and Environmental Management"},{"key":"S0022149X22000207_ref11","doi-asserted-by":"publisher","DOI":"10.1016\/j.smallrumres.2011.10.022"},{"key":"S0022149X22000207_ref2","first-page":"54","article-title":"An evaluation of protein, mineral supplements and anthelmintic treatment on communally managed sheep, naturally infected with gastrointestinal nematodes","volume":"15","author":"Bakunzi","year":"2018","journal-title":"Life Science Journal"},{"key":"S0022149X22000207_ref10","first-page":"126","article-title":"Gastrointestinal nematode parasitism in ewes and lambs raised in S\u00e3o Carlos, S\u00e3o Paul","volume":"17(Suppl 1)","author":"Chagas","year":"2008","journal-title":"Revista Brasileira de Parasitologia Veterin\u00e1ria"},{"key":"S0022149X22000207_ref6","doi-asserted-by":"publisher","DOI":"10.1016\/bs.apar.2016.02.022"},{"key":"S0022149X22000207_ref14","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2008.11.027"},{"key":"S0022149X22000207_ref22","doi-asserted-by":"publisher","DOI":"10.4038\/jnsfsr.v41i3.6059"},{"key":"S0022149X22000207_ref31","first-page":"558","article-title":"Seasonal prevalence of gastrointestinal parasites of goats in North-East Himalayan region of Sikkim, India","volume":"87","author":"Papri","year":"2017","journal-title":"Indian Journal of Animal Sciences"},{"key":"S0022149X22000207_ref7","doi-asserted-by":"publisher","DOI":"10.5539\/jas.v6n4p109"},{"key":"S0022149X22000207_ref33","first-page":"127","article-title":"Prevalence of gastrointestinal helminthes in pastoral sheep and goat flocks in Cholistan desert of Pakistan","volume":"24","author":"Raza","year":"2014","journal-title":"Journal of Animal and Plant Sciences"},{"key":"S0022149X22000207_ref3","doi-asserted-by":"publisher","DOI":"10.1007\/s12639-013-0413-3"},{"key":"S0022149X22000207_ref42","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2003.11.012"},{"key":"S0022149X22000207_ref29","doi-asserted-by":"publisher","DOI":"10.1007\/s11250-017-1499-x"},{"key":"S0022149X22000207_ref4","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2020.109041"},{"key":"S0022149X22000207_ref27","first-page":"238","article-title":"Gastrointestinal parasitic infection of slaughtered sheep (Zel breed) in Fereidoonkenar city of Iran","volume":"2","author":"Naem","year":"2013","journal-title":"Veterinary Research Forum"},{"key":"S0022149X22000207_ref12","doi-asserted-by":"publisher","DOI":"10.1016\/S1471-4922(01)01900-6"},{"key":"S0022149X22000207_ref28","first-page":"26","article-title":"Prevalence of gastrointestinal parasites of small ruminants in and around Jimma Town, Western Ethiopia","volume":"5","author":"Nuraddis","year":"2014","journal-title":"Acta Parasitologica Globalis"},{"key":"S0022149X22000207_ref21","doi-asserted-by":"publisher","DOI":"10.1007\/s00436-020-06927-6"},{"key":"S0022149X22000207_ref37","doi-asserted-by":"publisher","DOI":"10.5455\/javar.2017.d190"},{"key":"S0022149X22000207_ref39","first-page":"410","article-title":"Epidemiology of Eimeria infections in sheep raised extensively in a semi-arid region of Brazil","volume":"24","author":"Souza","year":"2015","journal-title":"Brazilian Journal of Veterinary Parasitology"},{"key":"S0022149X22000207_ref35","unstructured":"SEMARNAT (2010) Estrategia estatal para la conservaci\u00f3n y el manejo sustentable del borrego cimarr\u00f3n en Baja California [State strategy for the conservation and sustainable management of the bighorn sheep in Baja California]. Available at http:\/\/wwwspabcgobmx\/wp-content\/uploads\/2017\/10\/ESTRATEGIAESTATAL-CONSERVACION-_MANEJO-SUSTENTABLE-DEL-BORREGOCIMARRON-2012pdf (accessed 3 March 2019). [In Spanish.]"},{"key":"S0022149X22000207_ref40","doi-asserted-by":"publisher","DOI":"10.1080\/09291016.2018.1515806"},{"key":"S0022149X22000207_ref5","doi-asserted-by":"publisher","DOI":"10.2307\/3276639"},{"key":"S0022149X22000207_ref26","doi-asserted-by":"publisher","DOI":"10.1080\/09712119.2004.9706483"},{"key":"S0022149X22000207_ref36","first-page":"135","article-title":"Coccidia and gastrointestinal nematode infections in semi-intensively managed Jakhrana goats of semi-arid region of India","volume":"11","author":"Sharma","year":"2009","journal-title":"Tropical and Subtropical Agroecosystems"},{"key":"S0022149X22000207_ref17","first-page":"56","volume-title":"Status of the rocky mountain bighorn sheep in British Columbia","author":"Demarchi","year":"2000"},{"key":"S0022149X22000207_ref18","doi-asserted-by":"publisher","DOI":"10.2307\/5124"},{"key":"S0022149X22000207_ref23","first-page":"21","article-title":"Seasonal prevalence of gastrointestinal helminths in sheep and goats of middle agro-climatic zone of Jammu province","volume":"37","author":"Khajuria","year":"2013","journal-title":"Journal of Parasitic Diseases"},{"key":"S0022149X22000207_ref16","first-page":"13","article-title":"Breed and environmental factors influencing prevalence of helminths in sheep","volume":"47","author":"Dafur","year":"2021b","journal-title":"Nigerian Journal of Animal Production"},{"key":"S0022149X22000207_ref19","doi-asserted-by":"publisher","DOI":"10.1016\/bs.apar.2016.02.010"},{"key":"S0022149X22000207_ref15","doi-asserted-by":"crossref","first-page":"29","DOI":"10.9734\/ajravs\/2021\/v4i1124","article-title":"Breed and environmental effects on faecal egg counts in sheep of Nigeria","volume":"7","author":"Dafur","year":"2021a","journal-title":"Asian Journal of Research in Animal and Veterinary Sciences"},{"key":"S0022149X22000207_ref30","doi-asserted-by":"publisher","DOI":"10.1007\/s12639-020-01235-3"},{"key":"S0022149X22000207_ref41","first-page":"1","article-title":"Studies on abomasal nematodes of sheep in relation to temperate climatic factors","volume":"4","author":"Tariq","year":"2017","journal-title":"Journal of Zoology Studies"},{"key":"S0022149X22000207_ref24","doi-asserted-by":"publisher","DOI":"10.1007\/s00436-010-2066-9"}],"container-title":["Journal of Helminthology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022149X22000207","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,9,21]],"date-time":"2024-09-21T22:49:27Z","timestamp":1726958967000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022149X22000207\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022]]},"references-count":43,"alternative-id":["S0022149X22000207"],"URL":"https:\/\/doi.org\/10.1017\/s0022149x22000207","relation":{},"ISSN":["0022-149X","1475-2697"],"issn-type":[{"value":"0022-149X","type":"print"},{"value":"1475-2697","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022]]},"article-number":"e26"}}