Mixed Trypanosome Infection in Wild Glossina pallidipes Aust.

  • S. A. Tarimo
  • L. H. Otieno
  • P. Onyango
Research Article


Mixed T. congolense and T. brucei appeared in mice when proboscis from 3 field collected G. pallidipes were individually inoculated into mice. One of these flies had earlier been shown by dissection, to have T. congolense and the other two had T. brucei infection. A comparison of the growth rates of T. congolense and T. brucei in mice revealed that T. brucei always overshadowed T. congolense. These observations highlight the significance of multiple trypanosome infections in the epidemiology of African trypanosomiasis.

Key Words

T. brucei T. congolense growth rates G. pallidipes 


Le mélange T. congolense et T. brucei appara⩼ dans les sourris lorsque les trompes des trois mouches G. pallidipes collectées dans le champ d’experimentation etaient inoculees individuellement dans les sourris. Une des mouches avaient précocement montré par dissection ▵re porteus de T. congolense alors que les 2 autres présentaient une infection à T. brucei. Une étude comparative des taux de croissance de T. congolense et T. brucei dans les sourris rèvèle que T. brucei eclipse toujours T. congolense. Ces observations montrent clairement l’importance des infections multiples dans l’èpidémiologie de la trypanosomiase africaine.

Mots Cléfs

T. brucei T. congolense taux de croissance G. pallidipes 


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  1. Challier, A., Eyraud, M., Lafaye A. and Laveissiere G. (1977) Amelioration du rendement du piege biconique pour glossines (Diptera, Glossinidae) par l’emploi dium cone inferieur bleu. CAh. ORSTOM SER ent med. parasit 15, 283–286.Google Scholar
  2. Lloyd L. L. and Johnson W. B. (1924) The trypanosome infection of tsetse flies in Northern Nigeria and a new method of estimation. Bull. ent. Res. 14, 265–288.Google Scholar
  3. Moloo S. K. and Kutuza S. B. (1974) Sleeping sickness survey in Musoma District, Tanzania. Further study on the vector role of Glossina. Trans. R. Soc, Trop. Med. Hyg. 68, 403–409.CrossRefGoogle Scholar
  4. Moloo S. K., Dar F. and Kamunya G. W. (1982) The transmission of mixed infections of pathogenic Trypanosoma species to susceptible hosts by Glossina morsitans morsitans. Acta trop. 39, 303–306.PubMedGoogle Scholar
  5. Moloo S. K., Steiger R. F., Brun R. and Boreham P. F. L. (1971) Sleeping sickness survey of Musoma District, Tanzania, II. The role of Glossina in the transmission of sleeping sickness. Acta trop. 28, 189–205.PubMedGoogle Scholar
  6. Mwambu P. M. and Mayende J. S. P. (1973) Salivarian trypanosome infections in cattle in Ikoma, South Mara District, Tanzania. Parasitology 66, 381–385.CrossRefGoogle Scholar
  7. Otieno L. H. (1978) The presence in the salivary secretions of G. morsitans of stages of T. (T.) brucei other than those occurring in the salivary glands. Trans. R. Soc. Trop. Med. Hyg. 72, 622–626.CrossRefGoogle Scholar
  8. Otieno L. H. (1983) Inadequacy of the dissection method for estimating trypanosome infection rates. Ann. trop. Med. Parasitol. 11 (3), 329–330.CrossRefGoogle Scholar
  9. Otieno L. H. and Darji N. (1979) The abundance of pathogenic African trypanosome in the salivary secretions of wild Glossina pallidipes. Ann. trop. Med. Parasitol. 73, (6), 583–588.CrossRefGoogle Scholar
  10. Ward R. A. and Bell L. H. (1971) Transmission of Trypanosoma brucei by colonized Glossina austeni and G. Morsitans. Trans. R. Soc. trop. Med. Hyg. 65, 236–237.CrossRefGoogle Scholar

Copyright information

© ICIPE 1987

Authors and Affiliations

  • S. A. Tarimo
    • 1
  • L. H. Otieno
    • 1
  • P. Onyango
    • 1
  1. 1.International Centre of Insect Physiology and Ecology (ICIPE)NairobiKenya

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