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An analysis of survey measurements of tsetse challenge to trypanotolerant cattle in relation to aspects of analytical models of trypanosomiasis

Published online by Cambridge University Press:  06 April 2009

P. Rawlings ,
R. H. Dwinger  and
W. F. Snow
P. Rawlings
Affiliation:
International Trypanotolerance Centre, PMB 14, Banjul, The Gambia
R. H. Dwinger
Affiliation:
International Trypanotolerance Centre, PMB 14, Banjul, The Gambia
W. F. Snow
Affiliation:
International Trypanotolerance Centre, PMB 14, Banjul, The Gambia
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Extract

The recent development of analytical models of trypanosomiasis has increased the general applicability of models to the strategic control of the disease. An analysis of detailed data on tsetse abundance and infection rates and trypanosome prevalence in village-based trypanotolerant cattle over 4 years in The Gambia showed that seasonal patterns of abundance in Glossina morsitans-infested areas were consistent, and that the rates of trypanosome infection remained relatively unchanging. However, there were two distinct seasonal trypanosome prevalence patterns in cattle, with peaks occurring either in May/June/July or November/December. The peaks of trypanosome prevalence therefore occurred either 4 months before or after the times of peak challenge from G. morsitans, not 1 or 2 months after as predicted by analytical models. In G. palpalis-infested areas there was little seasonal variation in abundance or trypanosome infections, but peak trypanosome prevalence still occurred mostly in June/July. Despite the incongruity between the months of peak prevalence and challenge, the overall annual prevalence rates and tsetse challenge indices showed a significant linear relationship. It is concluded that existing analytical models need to be refined to take into account trypanotolerance and the various influences on the expression of this trait.

Keywords

Glossinachallengetrypanotolerancemodellingseasonalitylivestock

Information

Type
Research Article
Information
Parasitology , Volume 102 , Issue 3 , June 1991 , pp. 371 - 377
Copyright
Copyright © Cambridge University Press 1991

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References

Ashton-Tate, (1984). DBase III Plus Manual. Ashton-Tate, Culver City, Ca, USA.Google Scholar
Dukes, P., Faye, J. A, McNamara, J. J., Snow, W. F., Rawlings, P., Dwinger, R. H. & Brun, R. (1989). Isolation and cultivation in vitro to the infective, metacyclic stage of Trypanosoma (Nannamonas) simiae from Glossina morsitans submorsitans. Acta Tropica 48, 191–203.CrossRefGoogle Scholar
Dunsmore, J. R., Blair, Rains, , A, , Lowe, G. D. N., Moffat, D. J., Anderson, I. P. & Williams, J. B. (1976). The Agricultural Development of The Gambia: an Agricultural, Environmental and Socio-economic Analysis. Land Resources Study 22, 450 pp. Published by Land Resources Division, Ministry of Overseas Development, United Kingdom.Google Scholar
Flint, S. (1985). A comparison of various traps for Glossina spp. (Glossinidae) and other Diptera. Bulletin of Entomological Research 75, 529–34.Google Scholar
Green, C. H. & Flint, S. (1986). An analysis of colour effect in the performance of the F2 trap against Glossina pallidipes Austen and G. morsitans morsitans Westwood (Diptera: Glossinidae). Bulletin of Entomological Research 76, 409–18.Google Scholar
Habtemariam, T., Ruppaner, R., Riemann, H. P. & Thies, J. H. (1983 a). An epidemiologic system analysis model for African trypanosomiasis. Preventive Veterinary Medicine 1, 125–36.Google Scholar
Habtemariam, T., Ruppaner, R., Riemann, G. P. & Thies, J. H. (1983 b). Epidemic and endemic characteristics of trypanosomiasis in cattle: a simulation model. Preventive Veterinary Medicine 1, 137–45.Google Scholar
Habtemariam, T., Ruppaner, R., Riemann, H. P. & Thies, J. H. (1983 c). Evaluation of trypanosomiasis control alternatives using an epidemiologic simulation model. Preventive Veterinary Medicine 1, 147–56.CrossRefGoogle Scholar
Harvey, W. R. (1977). Users' Guide for Least-squares and Maximum Likelihood Computer Program. Ohio State University, Columbus, Oh, USA.Google Scholar
Leak, S. G. A., Awuome, K., Colardelle, C., Duffera, W., Feron, A., Mahamet, B., Mawuena, K., Mulongo, M., Nankodaba, G., Ordner, G., Pelo, M., Sheria, M., Tikubet, G., Toure, M. & Yangari, G. (1988). Determination of tsetse challenge and its relationship with trypanosome prevalence in trypanotolerant livestock at sites of the African Trypanotolerance Livestock Network. In Livestock Production in Tsetse Affected Areas of Africa. Proceedings of a Meeting held 23–27 November 1987, Nairobi, Kenya. Publ. ILCA/ILRAD.Google Scholar
Leak, S. G. A, Colardelle, C., D'Ieteren, G., Dumont, P., Feron, A., Jeannin, P., Minengu, M., Minja, S., Mulongo, M., Ngamuna, S., Ordner, G., Sauveroch, B., Trail, J. C. M. & Yangari, G. (1990). Importance of fusca group tsetse as vectors of cattle trypanosomiasis in Gabon and Zaire. Medical and Veterinary Entomology (in the Press).Google Scholar
McNamara, J., Dukes, P., Snow, W. F. & Gibson, W. C. (1989). Use of DNA probes to identify Trypanosoma congolense and T. simiae in tsetse flies from The Gambia. Acta Tropica 46, 55–61.Google Scholar
Milligan, P. J. M. & Baker, R. D. (1988). A model of tsetse-transmitted animal trypanosomiasis. Parasitology 96, 211–39.Google Scholar
Rogers, D. J. (1985). Trypanosomiasis ‘risk’ or ‘challenge’: a review. Acta Tropica 42, 5–32.Google ScholarPubMed
Rogers, D. J. (1988). A general model for the African trypanosomiases. Parasitology 97, 193–212.Google Scholar