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Summary: Insect Molecular Biology (1997) 6(2), 183-190
Phylogeny and potential transmission routes
of midgut-associatedendosymbiontsof tsetse
(Diptera: Glossinidae)
S. Aksoy,' X. Chen'" and V. Hypsa3
'Department of Epidemiology and Public Health,
Yale University School of Medicine, New Haven,
Connecticut, USA
Institute of Genetics, Fudan University, Shanghai,
PR China
Institute of Parasitology, Academy of Sciencesof
CzechRepublic and University of South Bohemia,
Ceske Budejovice, Czech Republic
Abstract
Many tsetse species (Dlptera: Glossinldae) harbour
two morphologically different intracellular endosym-
biotic microorganisms associated with gut tissue:
primary (P) and secondary (S) endosymbionts. The P-
endosymbionts of tsetse (Wigglesworthiaglossinidia)
are sequesteredin specializedepithelial cells, bacter-
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