| pubmed-article:4265556 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C0032659 | lld:lifeskim |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C1704319 | lld:lifeskim |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C1123019 | lld:lifeskim |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C0699762 | lld:lifeskim |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C0231239 | lld:lifeskim |
| pubmed-article:4265556 | lifeskim:mentions | umls-concept:C0006159 | lld:lifeskim |
| pubmed-article:4265556 | pubmed:issue | 1 | lld:pubmed |
| pubmed-article:4265556 | pubmed:dateCreated | 1973-4-4 | lld:pubmed |
| pubmed-article:4265556 | pubmed:abstractText | The seasonal changes in nematode populations of a flock of sheep in the Montreal area were determined using serial fecal egg counts, fecal culture of larvae and necropsy worm counts. It was found that Ostertagia spp.,Nematodirus spp., Trichostrongylus agei, Trichostrongylus spp. and Chabertia ovina over-wintered on pasture and could initiate patent infections the following spring. The development of populations of H. contortus was typical of that seen with most of the other species and was characterized by the following series of events. In early winter when the study was started with stabled pregnant ewes, most of the populations were immature and the egg counts were low and remained so throughout the entire winter. However, in the spring, following lambing, large numbers of adult worms were seen with a consequent decrease in immatures and a sudden increase in egg counts. When the ewes and lambs were pastured together, the egg counts in ewes dropped consequent to "self-cure", the "spring-rise" providing the major source of overwhelming infections for lambs with deaths by the end of July. As the season progressed larvae taken in by both ewes and lambs did not mature, and by early fall, most of the worm population consisted of immature forms. It appeared that H. contortus could not have more than two generations in ewes or lambs in a single grazing season. | lld:pubmed |
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| pubmed-article:4265556 | pubmed:language | eng | lld:pubmed |
| pubmed-article:4265556 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:4265556 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:4265556 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:4265556 | pubmed:month | Jan | lld:pubmed |
| pubmed-article:4265556 | pubmed:issn | 0008-4050 | lld:pubmed |
| pubmed-article:4265556 | pubmed:author | pubmed-author:GibbsH CHC | lld:pubmed |
| pubmed-article:4265556 | pubmed:author | pubmed-author:AyalewLL | lld:pubmed |
| pubmed-article:4265556 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:4265556 | pubmed:volume | 37 | lld:pubmed |
| pubmed-article:4265556 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:4265556 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:4265556 | pubmed:pagination | 79-89 | lld:pubmed |
| pubmed-article:4265556 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:4265556 | pubmed:year | 1973 | lld:pubmed |
| pubmed-article:4265556 | pubmed:articleTitle | Seasonal fluctuations of nematode populations in breeding ewes and lambs. | lld:pubmed |
| pubmed-article:4265556 | pubmed:publicationType | Journal Article | lld:pubmed |
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