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Survival of Theileria parva in its nymphal tick vector Rhipicephalus appendiculatus under laboratory and quasi natural conditions

By Horace Ochanda, A. S. Young and Graham Medley


Groups of nymphal Rhipicephalus appendiculatus Muguga, having a mean of 1 or 9 Theileria parva Muguga-infected salivary gland acini per tick, were kept under quasi-natural conditions at an altitude of 1950 m or 20°C at a relative humidity of 85% in the laboratory and their survival and infection prevalence and abundance determined over time. Theileria parva infections for both categories of ticks survived in the nymphal ticks for 50 or 26 weeks post salivary gland infection under quasi-natural or laboratory conditions respectively. There was a distinct decline in infections in the more heavily infected nymphae under both conditions of exposure, reflecting an apparent density dependence in parasite survival. Nymphal ticks having an average infection level of 1 infected salivary gland acinus per tick, survived for up to 69 or 65 weeks post-repletion under quasi-natural or the laboratory conditions respectively. Nymphae having an average infection level of 9 infected salivary gland acini per tick survived for a similar duration under each of the 2 conditions. The infection level of 9 infected salivary gland acini per tick did not seem to significantly affect the survival of the tick vector compared to those having an average of 1 infected salivary gland acinus per tick

Topics: SF, QR
Publisher: Cambridge University Press
Year: 2003
OAI identifier:

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  10. (1984). Survival of Rhipicephalus appendiculatus (Acarina: Ixodidae) and persistence of Theileria parva (Apicomplexa: Theileriidae) in the field. doi
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  19. (1981). The seasonal activity of Rhipicephalus appendiculatus Neumann, doi
  20. (1905). Further experiments to note how long an area remains infected with Each Coast fever. doi
  21. (2000). Pathological effects and reduced survival in Rhipicephalus appendiculatus ticks infected with Theileria parva protozoa. doi
  22. (1981). Epidemiology of East Coast fever: some effects of temperature on the development of Theileria parva in the tick vector, Rhipicephalus appendiculatus. doi
  23. (1983). Transmission of Theileria parva by a population of Rhipicephalus appendiculatus under simulated natural conditions. doi
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