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Experimental Transovarial Transmission of Kyasanur Forest Disease Virus in Haemaphysalis spinigera


TRANSOVAJRIAJL passage in ticks has been investigated for several viruses of the tick-borne encephalitis complex. Russian workers have reported that Russian spring–summer encephalitis virus can pass transovarially in Ixodes persulcatus, I. ricinus, Dermacentor silvarum and Haemaphysalis concinna1. Benda2, working with Ixodes ricinus and the European strain of tick-borne encephalitis in Czechoslovakia, demonstrated transovarial transmission in only 6 per cent of ticks, while Smorodintsev3 in the U.S.S.R. reported that it occurred in 5–25 per cent of ticks. In an investigation confirming transovarial transmission of tick-borne encephalitis virus in I. ricinus, Rehacek4 found that it occurred in 2 per cent of ticks infected by feeding and in 20 per cent of ticks infected by inoculation after feeding. Laboratory studies with a third member of the complex, Kyasanur forest disease virus, and its vector Haemaphysalis spinigera are reported here.

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  1. 1

    Blaskovic, D., and Rehacek, J., in Biological Transmission of Disease Agents, 135 (Academic Press, New York, 1962).

  2. 2

    Benda, R., J. Hyg. Epidem. (Prague), 2, 314 (1958).

  3. 3

    Smorodintsev, A. A., Prog. Med. Virol., 1, 210 (1958).

  4. 4

    Rehacek, J., Acta Virol., 6, 220 (1962).

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