{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T02:48:48Z","timestamp":1793242128317,"version":"4.5.0"},"reference-count":31,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2009,4,6]],"date-time":"2009-04-06T00:00:00Z","timestamp":1238976000000},"content-version":"unspecified","delay-in-days":5089,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[1995,5]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>The 4 species of ruminants (dromedary, zebu cattle, sheep and goat) in arid areas of Mauritania harboured <jats:italic>Haemonchus<\/jats:italic> spp. as the most frequent internal parasite. This was a rare situation where the 3 putative species, <jats:italic>H. longistipes<\/jats:italic> (dromedary), <jats:italic>H. placet<\/jats:italic> (zebu cattle) and <jats:italic>H. contortus<\/jats:italic> (sheep and goat) occurred sympatrically. The study was undertaken on hosts slaughtered at the Nouakchott abattoir, on the basis of monthly collection of worms. The environment was very unfavourable to <jats:italic>H. placei<\/jats:italic> and unfavourable to <jats:italic>H. contortus<\/jats:italic>, as intensity of infection remained low throughout the year, whereas infection in the dromedary was 10 to 20-fold higher. The survival strategies during the long, dry season were different: the surviving stages were either 4th-stage larvae in digesta (dromedaries), 4th-stage larvae either in digesta or mucosae (cattle), or 4th-stage larvae in mucosae and few adults (sheep and goats). The prolificacy of female worms, indicative of the potential to contaminate pastures, was similar for all <jats:italic>Haemonchus<\/jats:italic> spp. in the rainy season. <jats:italic>H. longistipes<\/jats:italic> behave differently during the pre-rainy season as no increase of prolificacy could be demonstrated as observed in the other species. Traits of vulvar morphology are considered as markers of ecological adaptation and were studied. The knobbed and smooth female morphs (in equal proportions) were the most frequent in <jats:italic>H. longistipes<\/jats:italic>, the knobbed morph out-numbered the other morphs in <jats:italic>H. placei<\/jats:italic>, and all 3 morphs were present in sheep and goats with the linguiform form being predominant. Genetic characterization of the 3 species was performed by means of Random Amplified Polymorphic DNA (RAPD). Three groups were obtained from analysis of these data: 1 group with individuals of <jats:italic>H. contortus<\/jats:italic>, 1 group with individuals of <jats:italic>H. placei<\/jats:italic>, and 1 group with individuals of <jats:italic>H. longistipes.<\/jats:italic> This indicated that, although the 3 species were valid, <jats:italic>H. contortus<\/jats:italic> and <jats:italic>H. placei<\/jats:italic> were more similar. Intraspecific variability was 2-fold higher in <jats:italic>H. contortus<\/jats:italic> than in the 2 other species. The ecological, morphological and genetical studies showed that <jats:italic>H. longistipes, H. placei<\/jats:italic> and <jats:italic>H. contortus<\/jats:italic> could be arranged in increasing order of variability.<\/jats:p>","DOI":"10.1017\/s0031182000064829","type":"journal-article","created":{"date-parts":[[2009,6,5]],"date-time":"2009-06-05T13:47:51Z","timestamp":1244209671000},"page":"483-492","source":"Crossref","is-referenced-by-count":35,"title":["Ecological, morphological and genetic characterization of sympatric <i>Haemonchus<\/i> spp. parasites of domestic ruminants in Mauritania"],"prefix":"10.1017","volume":"110","author":[{"given":"P.","family":"Jacquiet","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. F.","family":"Humbert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. M.","family":"Comes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Cabaret","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Thiam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D.","family":"Cheikh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2009,4,6]]},"reference":[{"key":"S0031182000064829_ref012","doi-asserted-by":"publisher","DOI":"10.1007\/BF00936458"},{"key":"S0031182000064829_ref031","doi-asserted-by":"publisher","DOI":"10.1016\/0304-4017(85)90102-5"},{"key":"S0031182000064829_ref008","doi-asserted-by":"publisher","DOI":"10.1016\/0166-6851(93)90246-T"},{"key":"S0031182000064829_ref022","volume-title":"Ecologie Num\u00e9rique, Tome 2: La Structure des Donn\u00e9es \u00e9cologiques","author":"Legendre","year":"1979"},{"key":"S0031182000064829_ref003","doi-asserted-by":"publisher","DOI":"10.1016\/0166-6851(93)90219-N"},{"key":"S0031182000064829_ref028","doi-asserted-by":"publisher","DOI":"10.1007\/BF00932194"},{"key":"S0031182000064829_ref002","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182000067779"},{"key":"S0031182000064829_ref018","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7519(77)90018-2"},{"key":"S0031182000064829_ref023","doi-asserted-by":"publisher","DOI":"10.1080\/00288233.1971.10421682"},{"key":"S0031182000064829_ref029","volume-title":"Manuel de l 'Utilisateur","author":"Stat-Itcf","year":"1988"},{"key":"S0031182000064829_ref016","doi-asserted-by":"publisher","DOI":"10.1016\/0304-4017(90)90024-6"},{"key":"S0031182000064829_ref001","doi-asserted-by":"publisher","DOI":"10.1016\/0021-9975(84)90037-9"},{"key":"S0031182000064829_ref007","doi-asserted-by":"publisher","DOI":"10.1016\/0014-4894(72)90065-3"},{"key":"S0031182000064829_ref021","doi-asserted-by":"publisher","DOI":"10.2307\/3277048"},{"key":"S0031182000064829_ref019","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7519(79)90049-3"},{"key":"S0031182000064829_ref009","doi-asserted-by":"publisher","DOI":"10.1007\/BF02351881"},{"key":"S0031182000064829_ref015","doi-asserted-by":"publisher","DOI":"10.1007\/BF01839021"},{"key":"S0031182000064829_ref017","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7519(94)90040-X"},{"key":"S0031182000064829_ref025","first-page":"45","article-title":"L'haemonchose du dromadaire","volume":"42","author":"Richard","year":"1989","journal-title":"Revue d 'Elevage et de M\u00e9decine v\u00e9t\u00e9rinaire des Pays tropicaux"},{"key":"S0031182000064829_ref004","doi-asserted-by":"publisher","DOI":"10.19182\/remvt.8016"},{"key":"S0031182000064829_ref005","doi-asserted-by":"publisher","DOI":"10.1016\/0304-4017(84)90109-2"},{"key":"S0031182000064829_ref006","doi-asserted-by":"publisher","DOI":"10.1007\/BF00346720"},{"key":"S0031182000064829_ref010","unstructured":"Faye-Grandjean I. (1987). Parasitoses gastro-intestinales du mouton et de la ch\u00e8vre en R\u00e9publique Islamique de Mauritanie. Th\u00e8se de Doctorat V\u00e9t\u00e9rinaire, Universit\u00e9 de Berne."},{"key":"S0031182000064829_ref011","volume-title":"Phylogeny Inference Package","author":"Felsenstein","year":"1993"},{"key":"S0031182000064829_ref013","doi-asserted-by":"publisher","DOI":"10.1007\/BF00009771"},{"key":"S0031182000064829_ref014","article-title":"Use of the Random Amplified Polymorphic DNA (RAPD) for identification of ruminant trichostrongylid nematodes","author":"Humbert","year":"1994","journal-title":"Parasitology Research"},{"key":"S0031182000064829_ref020","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7519(77)90010-8"},{"key":"S0031182000064829_ref024","doi-asserted-by":"crossref","first-page":"108","DOI":"10.1016\/S0034-5288(18)32914-X","article-title":"Inhibited development of Trichostrongylids of sheep in Northern Nigeria","volume":"26","author":"Ogunsusi","year":"1979","journal-title":"Research in Veterinary Sciences"},{"key":"S0031182000064829_ref026","doi-asserted-by":"publisher","DOI":"10.1071\/ZO9540275"},{"key":"S0031182000064829_ref027","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1016\/S0034-5288(18)34671-X","article-title":"The vulvar flap formula of Haemonchus contortus from sheep in South-East England","volume":"7","author":"Rose","year":"1966","journal-title":"Research in Veterinary Sciences"},{"key":"S0031182000064829_ref030","first-page":"19","article-title":"R\u00e9sultats d'enqu\u00eates sur les helminthiases du dromadaire dans le d\u00e9partement de Zinder (R\u00e9p. du Niger); leur \u00e1volution dans l'ann\u00e9e\u2013moyens de lutte","volume":"37","author":"Tager-Kagan","year":"1984","journal-title":"Revue d 'Elevage et de M\u00e9decine v\u00e9t\u00e9rinaire des Pays tropicaux"}],"container-title":["Parasitology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0031182000064829","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,13]],"date-time":"2019-05-13T22:30:16Z","timestamp":1557786616000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0031182000064829\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1995,5]]},"references-count":31,"journal-issue":{"issue":"4","published-print":{"date-parts":[[1995,5]]}},"alternative-id":["S0031182000064829"],"URL":"https:\/\/doi.org\/10.1017\/s0031182000064829","relation":{},"ISSN":["0031-1820","1469-8161"],"issn-type":[{"value":"0031-1820","type":"print"},{"value":"1469-8161","type":"electronic"}],"subject":[],"published":{"date-parts":[[1995,5]]}}}