An assessment of the use of cox1 and cox3 mitochondrial genetic markers for the identification of Dictyocaulus spp. (Nematoda: Trichostrongyloidea) in wild ruminants
2018
Pyziel, AnnaM. | Laskowski, Zdzisław | Höglund, Johan
Lungworms of the genus Dictyocaulus Railliet and Henry, 1907 (Nematoda: Trichostrongyloidea) are the causative agents of parasitic bronchitis (dictyocaulosis, husk) of various ungulate hosts, including domestic and wild ruminants. Correct diagnosis of lungworm species and a better understanding of the transmission patterns of Dictyocaulus spp. are crucial in minimising the risk of its cross transmission between wildlife and livestock, and for the control of dictyocaulosis. The study was conducted on large lungworms collected from European bison, roe deer and red deer. The study resulted in 14 sequences of the partial cox1 region of Dictyocaulus spp. and 10 novel DNA sequences of partial cox3 region, including the first available mt cox3 sequence, of the roe deer lungworm (D. capreolus). The European bison was infected with bison genotype of D. viviparus, whereas red deer and roe deer were infected with D. cervi and D. capreolus respectively. The current study revealed that the cox3 nucleotide sequences of D. capreolus and D. viviparus were 100% homologous to each other. Our findings indicate that the mt cox3 gene does not serve as an efficient mt marker for systematic, population genetic or molecular epidemiological studies of Dictyocaulus lungworms.
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