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Haemaphysalis longicornis: the life-cycle on dogs and cattle, with confirmation of its vector status for Theileria orientalis in Australia

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Marendy, D., Baker, K., Emery, D., Rolls, P. and Stutchbury, R. (2020) Haemaphysalis longicornis: the life-cycle on dogs and cattle, with confirmation of its vector status for Theileria orientalis in Australia. Veterinary Parasitology: X, 3 . p. 100022. ISSN 2590-1389

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Article Link(s): https://doi.org/10.1016/j.vpoa.2019.100022

Publisher URL: http://www.sciencedirect.com/science/article/pii/S2590138919300189

Abstract

The intracellular protozoal parasite Theileria orientalis ikeda has rapidly spread across South-eastern Australia since 2006, causing deaths and production losses in cattle. The 3-host “bush tick” Haemaphysalis longicornis (Neumann) appears the principal biological vector in the endemic regions. To generate sufficient numbers of ticks to produce stabilate for infection to confirm vector competency and for acaricide trials, the optimal conditions and stage-specific intervals for the generational life-cycle of H.longicornis was defined on two dogs and two steers. To determine whether H.longicornis was a definitive host for Theileria orientalis, nymphal stages were fed on a steer infected with T.orientalis and moulted adults were permitted to feed for 3 days on an uninfected calf prior to harvest. Subsequent detection of infection after inoculation of four naïve calves with stabilate produced from ground-up adult ticks or dissected salivary glands confirmed H.longicornis as one final (definitive) host for T.orientalis in Australia.

Item Type:Article
Business groups:Biosecurity Queensland
Additional Information:Open access
Keywords:Ikeda Theileriosis Transmission Ticks
Subjects:Science > Invasive Species > Animals
Animal culture > Cattle
Animal culture > Other domesticated and semi-domesticated animals
Veterinary medicine > Veterinary parasitology
Deposited On:08 Jan 2020 05:51
Last Modified:08 Jan 2020 05:51

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