نتایج جستجو برای: teladorsagia circumcincta
تعداد نتایج: 257 فیلتر نتایج به سال:
Exsheathed infective larvae (L3) of 16 species of nematodes were tested for infectivity in either sheep or cattle after they had been frozen and stored in 0,09% NaCl solution in the gas phase of liquid nitrogen for periods of up to 59 months. A mean of greater than 90% of the L3 of Haemonchus contortus, Ostertagia circumcincta, Trichostrongylus axei, Trichostrongylus colubriformis, Nematodirus ...
Sickness behaviours are believed to be an adaptive response infection. However, the degree which these can expressed may impacted by individual's social environment. Here we tested, first, whether parasitism reduces activity behaviour of lambs, Ovis aries , second, this occurs prior other observed costs and, third, infection status individuals affects expressed. Sixty lambs were separated into ...
BACKGROUND Benzimidazole (BZ) resistance in gastrointestinal nematodes is associated with a single nucleotide polymorphism (SNP) at codons 167, 198 and 200 in the isotype 1 of beta-tubulin gene although in some species these SNPs have also been associated with resistance to macrocyclic lactones. In the present study we compared the levels of resistance in Teladorsagia circumcincta and Trichostr...
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