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J Gen Virol 67 (1986), 527-536; DOI 10.1099/0022-1317-67-3-527
© 1986 Society for General Microbiology
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Properties of a Novel DNA Virus from the Tsetse Fly, Glossina pallidipes

M. O. Odindo1, C. C. Payne2, N. E. Crook2 and P. Jarrett2

1 The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30, Mbita, Kenya
and2 Glasshouse Crops Research Institute, Worthing Road, Littlehampton, West Sussex BN17 6LP, U.K.

Virus particles were isolated from hypertrophied salivary glands of the tsetse fly, Glossina pallidipes collected near Mombasa, Kenya. Purified virus particles were rodshaped, 57 nm wide by 700 to 1300 nm long. Particle lengths fell into two size classes, with ‘short’ particles averaging 869 nm and ‘long’ particles 1175 nm. The virus particles morphologically resembled elongated baculovirus nucleocapsids although, unlike baculoviruses, no fully enveloped virions were found in purified preparations. The particles contained double-stranded DNA which appeared to be linear when analysed by electrophoresis in agarose gels, ethidium bromide-caesium chloride gradient centrifugation or electron microscopy (EM). There was some evidence for the DNA being heterogeneous in size from EM studies and from the observation that restriction enzyme analysis failed to provide a clear profile of DNA fragments. Protein from purified virions contained at least 12 polypeptides with a major component of 39000 mol. wt. These results suggest that the virus cannot be placed in any of the existing taxonomic groupings of DNA viruses.

Keywords: tsetse fly (Glossina pallidipes), DNA virus, salivary glands, insect virus

Received 2 October 1985; accepted 13 December 1985.


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