ecological, morphological and genetic characterization of sympatric haemonchus spp. parasites of domestic ruminants in mauritania. | the 4 species of ruminants (dromedary, zebu cattle, sheep and goat) in arid areas of mauritania harboured haemonchus spp. as the most frequent internal parasite. this was a rare situation where the 3 putative species, h. longistipes (dromedary), h. placei (zebu cattle) and h. contortus (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 h. placei an ... | 1995 | 7753587 |