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Morphological and taxonomic studies on mammalian trypanosomes

VIII. Revision of Trypanosoma evansi

Published online by Cambridge University Press:  06 April 2009

Cecil A. Hoare  and
With a Statistical Analysis by J. W. Trevan
Cecil A. Hoare
Affiliation:
Wellcome Laboratories of Tropical Medicine, London
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Extract

The present revision of the morphology, taxonomy and affinities of trypanosomes causing Surra in the Old World was undertaken in order to determine the status of the diverse geographical and hostal strains, the exact relation of which to Trypanosoma evansi and allied species was hitherto a subject of controversy. The material for this study was represented by thirty strains from diverse mammalian hosts and various countries, extending from Morocco to the Philippines.

One of the problems dealt with is the occurrence of polymorphism in T. evansi. When single samples of typical (monomorphic) strains from naturally infected animals were examined, only negligible numbers of stumpy forms (0·05–0·40 %) were found in a minority of cases. But in strains kept under continuous observation for several years the proportion of stumpy forms occasionally rose higher (2–25%), while one strain exhibited a remarkable and persistent degree of polymorphism in the course of 17 years, the proportion of stumpy forms—including numerous posteronuclear ( = posterior-nuclear) ones—fluctuating from 0 to 60%. It was shown that—as in the case of the Brucei group—the length distributions in polymorphic samples of T. evansi could be statistically resolved into distinct curves, corresponding to the three morphological components (stumpy, intermediate, slender).

Type
Research Article
Information
Parasitology , Volume 46 , Issue 1-2 , May 1956 , pp. 130 - 172
Copyright
Copyright © Cambridge University Press 1956

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References

REFERENCES

Adams, A. R. D. (1935). Trypanosomiasis of stock in Mauritius. II. Observations on the incidence and distribution of trypanosomiasis in cattle. Ann. Trop. Med. Parasit. 29, 475.CrossRefGoogle Scholar
Balbiani, G. (1888). Evolution des micro-organismes animaux et végétaux parasites. Les Mastigophores. J. Micrograph. 12, 394.Google Scholar
Balfour, A. (1914). [Discussion of Bruce, D. (1914), q.v.]Google Scholar
Barotte, J. (1925). Les trypanosomiases de l'Afrique du Nord. Mém. Soc. Sci. nat. Maroc, 11, 1.Google Scholar
Brand, T. von (1951). The physiology of blood flagellates. In Parasitic Infections in Man, p. 90. New York.Google Scholar
Bruce, D. (1911). The morphology of Trypanosoma evansi (Steel). Proc. Roy. Soc. B, 84, 181.Google Scholar
Bruce, D. (1914). Classification of the African trypanosomes pathogenic to man and domestic animals. Trans. Soc. Trop. Med. Hyg. 8, 1.CrossRefGoogle Scholar
Bruce, D. (1915). The Croonian lectures on trypanosomes causing disease in man and domestic animals in Central Africa. Lecture 1. Classification of trypanosomes. Brit. Med. J. i, 1073.Google Scholar
Bruce, D., Hamerton, A. E., Bateman, H. R. & Mackie, F. P. (1910). Trypanosome diseases of domestic animals in Uganda. II. Trypanosoma brucei (Plimmer and Bradford). Proc. Roy. Soc. B, 83, 1.Google Scholar
Bruce, D., Harvey, D., Hamerton, A. E. & Bruce, M. E. (1913 a). Morphology of various strains of the trypanosome causing disease in man in Nyasaland. I. The human strain. Proc. Roy. Soc. B, 86, 285.Google Scholar
Bruce, D., Harvey, D., Hamerton, A. E. & Bruce, M. E. (1913 b). Morphology of various strains of the trypanosome causing disease in man in Nyasaland. The Mzimba strain. Proc. Roy. Soc. B, 87, 26.Google Scholar
Bruce, D., Harvey, D., Hamerton, A. E., Davey, J. B. & Bruce, M. E. (1915 a). Trypanosome disease of man and domestic animals in Nyasaland. Rep. Sleep. Sickn. Comm. Boy.Soc. 16, 29.Google Scholar
Bruce, D., Harvey, D., Hamerton, A. E., Davey, J. B. & Bruce, M. E. (1915 b). Description of three strains of Trypanosoma gambiense from Lake Tanganyika. Rep. Sleep. Sickn. Comm. Boy. Soc. 16, 188.Google Scholar
Crookshank, E. M. (1886). Flagellated protozoa in the blood of diseased and apparently healthy animals. J. R. Micr. Soc. 6, 913.Google Scholar
Culwick, A. T. & Willett, K. C. (1947: in litteris).Google Scholar
Davis, B. S. (1952). Studies on the trypanosomes of some California mammals. Univ. Calif. Publ. Zool. 57, (3) 145.Google Scholar
Dice, L. R. & Leraas, J. H. (1936). A graphic method for comparing several sets of measurements. Contr. Lab. Vertebr. Genet. Univ. Mich. 3, 1.Google Scholar
Duke, H. L. (1912). A camel trypanosome, with some remarks on the biometric method of diagnosing trypanosomes. Proc. Boy. Soc. B, 85, 563.Google Scholar
Duke, H. L. (1923). Further inquiries into the zoological status of the polymorphic mammalian trypanosomes of Africa, and the means by which they are spread in nature. Parasitology, 15, 258.CrossRefGoogle Scholar
Duke, H. L. (1930). On the occurrence in man of strains of T. gambiense non-transmissible cyclically by G. palpalis. Parasitology, 22, 490.Google Scholar
Duke, H. L. (1935). Studies on the factors that may influence the transmission of the polymorphic trypanosomes by tsetse. IX. On the infectivity to Glossina of the trypanosome in the blood of the mammal. Ann. Trop. Med. Parasit. 29, 131.CrossRefGoogle Scholar
Dutton, J. E. & Todd, J. L. (1903). First report of the trypanosomiasis expedition to Senegambia (1902). Mem. Lpool Sch. Trop. Med. 11, 1.Google Scholar
Emelin, V. & Zeiss, H. (1928 a). Die therapeutische und prophylaktische Behandlung der Kameltrypanosomiase Su-auru mit Naganol. Rev. Microbiol., Saratov, 7, 423, 462. [Russian with German summary.]Google Scholar
Emelin, V. & Zeiss, H. (1928 b). Die Bekämpfung der Kameltrypanosomiase in Russland. C.R. (Doklady) Acad. Sci. U.R.S.S., no. 20/21, A, 417.Google Scholar
Fairbairn, H. (1953). Studies on Trypanosoma vivax. IX. Morphological differences in strains and their relation to pathogenicity. Ann. Trop. Med. Parasit. 47, 394.CrossRefGoogle ScholarPubMed
Fairbairn, H. & Culwick, A. T. (1946). A new approach to trypanosomiasis. Ann. Trop. Med. Parasit. 40, 421.Google Scholar
Fairbairn, H. & Culwick, A. T. (1949). The differentiation of the polymorphic trypanosomes. Ann. Trop. Med. Parasit. 43, 90.Google Scholar
Fiori, C., Delanoë, P. & Delanoë, (Mme). (1915). Sur un cas de trypanosomiase constatéchez un cheval à Mazagan. Bull. Soc. Pat. exot. 8, 503.Google Scholar
Fiori, C., Delanoë, P. & Delanoë, (Mme). (1916). An sujet du dimorphisme du trypanosome de Mazagan. Bull. Soc. Pat. exot. 9, 130.Google Scholar
Fry, W. B. (1911). Animal trypanosomiases in the Anglo-Egyptian Sudan. Rep. Wellcome Trop. Res. Lab. 4A, 41.Google Scholar
Gilmour, J. S. L. & Gregor, J. W. (1939). Demes: a suggested new terminology. Nature, Lond., 144, 333.Google Scholar
Gilmour, J. S. L. & Heslop-Harrison, J. (1954). The deme terminology and the units of micro-evolutionary change. Genetica, 27, 147.CrossRefGoogle ScholarPubMed
Hoare, C. A. (1938). Morphological and taxonomic studies on mammalian trypanosomes. V. The diagnostic value of the kinetoplast. Trans. R. Soc. Trop. Med. Hyg. 32, 333.Google Scholar
Hoare, C. A. (1940 a). Studies on the behaviour of Trypanosoma evansi in tsetse flies, with special reference to its phylogeny. Parasitology, 32, 105.CrossRefGoogle Scholar
Hoare, C. A. (1940 b). Recent studies on the kinetoplast in relation to heritable variation in trypanosomes. J. R. Micr. Soc. 60, 26.CrossRefGoogle Scholar
Hoare, C. A. (1943). Biological races in parasitic protozoa. Biol. Rev. 18, 137.CrossRefGoogle Scholar
Hoare, C. A. (1948 a). Tsetse-borne trypanosomiases outside their natural boundaries. Ann. Soc. belge Méd. trop. (Liber Jubilaris J. Rodhain: 1947), p. 267.Google Scholar
Hoare, C. A. (1948 b). The relationship of the Haemoflagellates. Proc. 4th Int. Congr. Trop. Med. Malar. (Washington), 2, 1110.Google Scholar
Hoare, C. A. (1949). Handbook of Medical Protozoology. London.Google Scholar
Hoare, C. A. (1950). Akinetoplastic strains of Trypanosoma evansi and the status of allied trypanosomes in America. Rev. Soc. Mexic. Hist. nat. 10, 81.Google Scholar
Hoare, C. A. (1952). The polymorphism of Trypanosoma evansi. Trans. R. Soc. Trop. Med. Hyg. 46, 367.CrossRefGoogle Scholar
Hoare, C. A. (1954 a). The loss of the kinetoplast in trypanosomes, with special reference to Trypanosoma evansi. J. Protozoology, 1, 28.Google Scholar
Hoare, C. A. (1954 b). The revival of Trypanosoma suis. Trans. R. Soc. Trop. Med. Hyg. 48, 366.CrossRefGoogle Scholar
Hoare, C. A. (1955). Intraspecific biological groups in pathogenic protozoa. Refuah Veterinarith (Tel-Aviv), 12, 263.Google Scholar
Hoare, C. A. & Bennett, S. C. J. (1937). Morphological and taxonomic studies on mammalian trypanosomes. III. Spontaneous occurrence of strains of Trypanosoma evansi devoid of the kinetonucleus. Parasitology, 29, 43.CrossRefGoogle Scholar
Hoare, C. A. & Bennett, S. C. J. (1939). Morphological and taxonomic studies on mammalian trypanosomes. VI. Further observations on the absence of the kinetoplast in Trypanosoma evansi. Parasitology, 30, 529.CrossRefGoogle Scholar
Hoare, C. A. & Broom, J. C. (1938). Morphological and taxonomic studies on mammalian trypanosomes. IV. Biometrical study of the relationship between Trypanosoma uniforms and T. vivax. Trans. R. Soc. Trop. Med. Hyg. 31, 517.Google Scholar
Hoare, C. A. & Coutelen, F. (1933). Essai de classification des trypanosomes des mammifères et de l'homme, basée sur leurs caractères morphologiques et biologiques. Ann. Parasit. hum. comp. 11, 196.Google Scholar
Hornby, H. E. (1930). Control of animal trypanosomiasis. XI Int. Vet. Congr., London, 3, 614.Google Scholar
Hubbs, C. L. & Perlmutter, A. (1942). Biometric comparison of several samples, with particular reference to racial investigations. Amer. Nat. 76, 582.Google Scholar
Huxley, J. (1938). Clines: an auxiliary taxonomic principle. Nature, Lond., 142, 219.Google Scholar
Joyeux, C. & Sautet, J. (1941). Sur quelques détails morphologiques d'une souche syrienne de Trypanosoma evansi (Steel, 1885). Arch. Inst. Pasteur Algér. 19, 222.Google Scholar
Lavier, G. (1927). The posterior-nuclear form. Interim Rep. League of Nations Comm. Hum. Trypanosomiasis, p. 118. Geneva.Google Scholar
Lavier, G. (1928). A morphological study of strains isolated at Entebbe Laboratory by the International Sleeping Sickness Commission. Final Rep. League of Nations Comm. Hum. Trypanosomiasis, p. 122. Geneva.Google Scholar
Lavier, G. (1933). Sur le polymorphisme réel de certains trypanosomes réputés monomorphes. Ann. Parasit. hum. comp. 11, 280.Google Scholar
Lavier, G. (1942–1943). L'évolution de la morphologic dans le genre Trypanosoma. Ann. Parasit. hum. comp. 19, 168.Google Scholar
Leese, A. S. (1911). [Letter quoted in] The transmission of Surra. Bull. Sleep. Sickn. Bur. 3, 367.Google Scholar
Leese, A. S. (1927). A Treatise on the One-humped Camel. Stamford.Google Scholar
Lester, H. M. O. (1933). The characteristics of some Nigerian strains of the polymorphic trypanosomes. Ann. Trop. Med. Parasit. 27, 361.CrossRefGoogle Scholar
Lewis, D. J. (1949). The tsetse fly problem in the Anglo-Egyptian Sudan. Sudan Notes, 30, (II), 179.Google Scholar
Lingard, A. (1907). Different species of Trypanosomata observed in bovines in India. J. Trop. Vet. Sci. 2, 1.Google Scholar
Mahomed, Z. (1939). [A trypanosome in a tigress.] Vet. Serv. Bull. (Cairo), 200. [Quoted from abstract in Nature, Lond., 144, 790.]Google Scholar
Manresa, M. & Gonzalez, B. M. (1935). Studies on Surra. IV. Variability in size of the trypanosomes and density of infection, natural and acquired immunity. Philipp. Agric. 24, 716.Google Scholar
Maynard, G. D. (1915). The trypanosomes of Sleeping Sickness. S. Afr. Inst. Med. Res. Johannesburg, 6 [sep. pag.].Google Scholar
Minchin, E. A. (1908). Note on the polymorphism of Trypanosoma gambiense. Parasitology, 1, 236.Google Scholar
Mornet, P. (1954). Les trypanosomes pathogènes de l'A.O.F. Considérations sur leur répartition, leur fréquence, les taux d'infestation des animaux domestiques. Bull. Soc. Pat. exot. 47, 709.Google Scholar
Mudaliar, S. V. (1945). Studies on a variant of Trypanosoma evansi in a buffalo. Proc. Indian Acad. Sci. 21 B, 101.CrossRefGoogle Scholar
Nani, S. & Vergati, A. (1951). Contributo allo studio della infezione sperimentale da Trypanosoma evansi. Riv. Parassit. 12, 141.Google Scholar
Nattan-Larrier, L. & Noyer, B. (1931). Trypanosome du dromadaire et trypanosome du cheval au Maroc. (3° mém). Bull. Soc. Pat. exot. 24, 569.Google Scholar
Nattan-Larrier, L. & Noyer, B. (1932). Le trypanosome du Débab Egyptien. Bull. Soc. Pat. exot. 25, 563.Google Scholar
Pavlov, P. & Guenev, C. (1939). Recherches sur un trypanosome (Trypanosoma evansi Steel, 1885) trouvé dans le sang d'un eheval de la région de Bourgas en Bulgarie. Ann. Parasit. hum. comp. 17, 158.CrossRefGoogle Scholar
Peel, E. & Chardome, M. (1954). Trypanosoma suis Ochman 1905, trypanosome monomorphe pathogène de mammifères, évoluant dans les glandes salivaires de Glossina brevipalpis Newst., Mosso (Urundi). Ann. Soc. belge Méd. trop. 34, 277.Google Scholar
Pricolo, A. (1912). Un tripanosoma dei dromedari. Clin. vet., Milan, 35, 272.Google Scholar
Pricolo, A. & Ferraro, G. (1914). La trypanosomiasi del camello. Clin. vet., Milan, 37, 941.Google Scholar
Rao, M. A. N. & Mudaliar, S. V. (1934). Some observations on the trypanosomes of cattle in South India. Indian J. vet. Sci. 4, 362.Google Scholar
Ray, H. N. (1945). A preliminary study of the biometrioal relationship between trypanosomes of equine and bovine origin in India. Proc. Nat. Inst. Sci. India, 11, 21.Google Scholar
Reichenow, E. (1921). Untersuchungen über das Verhalten von Trypanosoma gambiense im menschlichen Körper. Z. Hyg. InfektKr. 94, 266.Google Scholar
Reichenow, E. (1928). Doflein's Lehrbuch der Protozoenkunde, 5th ed. 2, Jena.Google Scholar
Robertson, M. (1912). Notes on the polymorphism of Trypanosoma gambiense in the blood and its relation to the exogenous cycle in Glossina palpalis. Proc. Roy. Soc. B, 85, 527.Google Scholar
Robertson, M. (1913). Notes on the behaviour of a polymorphic trypanosome in the bloodstream of the mammalian host. Rep. Sleep. Sickn. Comm. Roy. Soc. 13, 111.Google Scholar
Sergent, Ed., Sergent, Et. & Lhéritier, A. (1912). Étude comparative du debab et de quelques autres trypanosomiases. Bull. Soc. Pat. exot. 5, 274.Google Scholar
Stephens, J. W. W. & Fantham, H. B. (1912). The measurements of Trypanosoma rhodesiense Proc. Roy. Soc. B, 85, 223.Google Scholar
Stephens, J. W. W. & Fantham, H. B. (1913). Further measurements of Trypanosoma rhodesiense and T. gambiense. Ann. Trop. Med. Parasit. 7, 27.CrossRefGoogle Scholar
Velu, H. (1918). Une trypanosomiase du cheval au Maroc. Étude clinique et expérimentale. Rev. gén. Méd. vét. 27, 489.Google Scholar
Wenyon, C. M. (1926). Protozoology, Vol. 1: London.Google Scholar
Yakimoff, W. L. (1921). À propos de l'identification du trypanosome des chameaux du Turkestan Russe. Bull. Soc. Pat. exot. 14, 638.Google Scholar
Yakimoff, W. J. (1931). [Diseases of domestic animals caused by protozoa. Veterinary protozoology.] Moscow-Leningrad. [In Russian.]Google Scholar
Yorke, W. (1914). [Discussion of Bruce, D. (1914) q.v.]Google Scholar
Yorke, W. & Blacklock, B. (1914). The differentiation of the more important mammalian trypanosomes. Ann. Trop. Med. Parasit. 8, 1.Google Scholar
Zeiss, H. (1937). Die Bekämpfung der Kameltrypanosomiase in Russland. Festschrift B. Nocht. Hamburg, p. 674.Google Scholar