{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T07:09:54Z","timestamp":1780556994913,"version":"3.54.1"},"reference-count":0,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[1998,8,1]],"date-time":"1998-08-01T00:00:00Z","timestamp":901929600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[1998,8]]},"abstract":"<jats:p>The impact of mixed, nematode infection upon a group of animals\n \nwill depend upon the number of nematodes present, \nhow they are distributed among hosts and whether individuals that \nare heavily parasitized with one species are more likely \nto be heavily parasitized with other species. A survey of over 500 \nsix-month-old, Scottish Blackface lambs from a single \nfarm in Southwest Strathclyde identified 7 different categories of \nnematodes in the abomasum and small intestine. There \nwere considerable differences among years and among nematodes in \nthe prevalence and mean intensity of infection. <jats:italic>Ostertagia circumcincta<\/jats:italic> was present in nearly all lambs and judged \nby prevalence and intensity is one of the most successful \nof all parasitic nematodes. Each category of nematodes had a \nskewed distribution; most animals had relatively few worms \nbut a small proportion had many worms. The variances of the number \nof nematodes in each category were approximately \nequal to the square of the mean. The counts of adult <jats:italic>O. circumcincta<\/jats:italic>\n \nfollowed a negative binomial distribution, but the \nnegative binomial distribution did not provide a good description of \nthe observed values for the other species. These other \nspecies had a lower prevalence and possibly some sheep were not exposed\n \nto infection. There was no significant genetic \nvariation among lambs in the number of nematodes present and therefore\n \nthe differences among these lambs were unlikely \nto be a consequence of genetic differences in host susceptibility. \nLambs with increased numbers of one species were more \nlikely to have increased numbers of the other species, but the \ncorrelations were weak and may reflect covariation in \nexposure to different parasites.<\/jats:p>","DOI":"10.1017\/s0031182098002868","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T13:30:22Z","timestamp":1027776622000},"page":"165-171","source":"Crossref","is-referenced-by-count":62,"title":["The processes influencing the distribution of parasitic \nnematodes among naturally infected lambs"],"prefix":"10.1017","volume":"117","author":[{"given":"M. J.","family":"STEAR","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"BAIRDEN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S. C.","family":"BISHOP","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G.","family":"GETTINBY","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Q. A.","family":"McKELLAR","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"PARK","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"STRAIN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. S.","family":"WALLACE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[1998,8,1]]},"container-title":["Parasitology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0031182098002868","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,4,8]],"date-time":"2019-04-08T19:31:57Z","timestamp":1554751917000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0031182098002868\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1998,8]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1998,8]]}},"alternative-id":["S0031182098002868"],"URL":"https:\/\/doi.org\/10.1017\/s0031182098002868","relation":{},"ISSN":["0031-1820","1469-8161"],"issn-type":[{"value":"0031-1820","type":"print"},{"value":"1469-8161","type":"electronic"}],"subject":[],"published":{"date-parts":[[1998,8]]}}}