The O. I. E. Ad Hoc Group On Non Tsetse Transmitted Animal Trypanosomoses (NTTAT) With Special Reference To T. evansi Infection

抄録

Before being designated in 1991 by the OIE administrative Commission as an “ad hoc Group on NTTAT” the Group devoted its activities since 1983 to the following specific aims: (i) economic impact of T. evansi infections; (ii) development of diagnostic tests; (iii) studies in variation in pathogenicity of isolates of T. evansi; (iv) variation in sensitivity of trypanocidal drugs; (v) exchange of strains between laboratories; (vi) setting up of new means for controlling T. evansi infections. After several years (1983-1991) the following achievements were reached: (i) collection of many epidemiological data from Africa, Asia and South America; (ii) free distribution of diagnostic kits for testing in the field and appreciation of results obtained; (iii) greater interest in the study of this infection worldwide mainly in the camel and buffalo breeding; (iv) synthesis　of　two new　trypanocidal　drugs followed　by　the　development　and　marketing of one of them (melarsomine) devoted to the treatment of Surra in camels.
In 1991 the scope of the Group was extended to the other NTTAT, mainly to T. vivax and T. equiperdum infections due to the persistence of T. vivax in tsetse depopulated areas and in some zones of South America and to the difficulty to differentiate T. evansi and T. equiperdum infections by diagnostic means currently in use.
The 1st International Seminar on NTTAT was held in Annecy France, 14-16 October 1992 with participation of research workers from 22 countries (Africa, Asia, Europe, South America). Conclusions and Recommendations were published in Rev. Sci. Techn. OIE, 1993, 12: 273-281.
The ad hoc Group continues to focus its attention to the problem of Surra in camels (in Africa a coordinating project is being developed in West and East Africa) to control the disease and to the immunosuppression of other animal species unapparently or chronically T. evansi infected.