Hostname: page-component-5c6d5d7d68-tdptf Total loading time: 0 Render date: 2024-08-17T15:37:48.319Z Has data issue: false hasContentIssue false
  • English
  • Français

Trypanosoma (Megatrypanum) hoarei sp.nov. (Protozoa: Trypanosomatidae) from shrews of the genus Sorex in California*

Published online by Cambridge University Press:  06 April 2009

Betty S. Davis
Betty S. Davis
Affiliation:
Frances Simes Hastings Natural History Reservation, University of California, Carmel Valley, California, and the George Williams Hooper Foundation, University of California Medical Center, San Francisco, California
Get access Rights & Permissions [Opens in a new window]

Extract

A new species of Trypanosoma, T. (Megatrypanum) hoarei, is described from shrews of the genus Sorex (S. trowbridgii, S. vagrans, S. ornatus, and S. palustris) in California. Four body types are found in adult populations of T. hoarei, two common and two rare, as well as intermediate stages, indicating a tendency to-ward polymorphism in this species. Multiplication is discontinuous, with a reproductive and growth period characterized by moderate numbers of diverse and bizarre developmental forms in the blood and high coefficients of variation for total length (20–30 %), succeeded by an adult phase with few trypanosomes in the blood and lower coefficients of variation for total length (7–12 %). The method and site of multiplication in T. hoarei is unknown but evidence indicates that reproduction by multiple fission or binary fission of amastigote forms may occur in tissue capillaries, with the production of large, rounded amastigote individuals. The latter develop, without intervention of epimastigote stages, into large, rounded trypomastigote individuals from which a wide variety of other developmental forms proceed, including certain distinctive, very long ribbon-like trypanosomes. A review of the literature on mole and shrew trypanosomes suggests that T. hoarei of Sorex, T. petrodromi from Petrodrorrms, and T. talpae from Talpa are related, primitive insectivore forms, clearly distinguishable from the lewisi-type trypanosomes also found in insectivores.

Type
Research Article
Information
Parasitology , Volume 59 , Issue 2 , May 1969 , pp. 469 - 491
Copyright
Copyright © Cambridge University Press 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bruce, D., Harvey, D., Hamerton, A. E., Davey, J. B. & Bruce, Lady, (1915). Trypanosomes and other parasites of animals in Nyasaland. Rep. Sleep. Sickn. Comm. R. Soc. 16, 203–7.Google Scholar
Brumpt, E. (1923). Description d'une nouvelle espèce de trypanosome, Trypanosoma crocidurae, chez une musaraigne (Crocidurarussulus). Ann. Parasitol. 1, 262–4.CrossRefGoogle Scholar
Coles, A. C. (1914). Blood parasites found in mammals and fishes in England. Parasitology 7, 17–61.CrossRefGoogle Scholar
Davis, B. (1952). Studies on the trypanosomes of some California mammals. Univ. Calif. Publ. Zool. 57, 145–250.Google Scholar
Delanoë, P. (1921). Au sujet de Trypanosoma talpae Nabarro. Bull. Soc. Path. Exot. 14, 453–5.Google Scholar
Dice, L. R. & Leraas, H. J. (1936). A graphic method for comparing several sets of measurements. Contr. Lab. Vert. Gen. Univ. Mich. 3, 1–3.Google Scholar
Fisher, R. A. (1946). Statistical Methods for Research Workers, 354 pp. London: Oliver and Boyd.Google Scholar
França, C. (1910). Sur les hématozoaires des taupes. Arch. Inst. Bact., Camara Pestana 3, 271–8.Google Scholar
Henry, H. (1913). A consideration of the infective granule in the life-history of protist organisms. J. Path. Bact. 18, 250–8.CrossRefGoogle Scholar
Hoare, C. A. (1964). Morphological and taxonomic studies on mammalian trypanosomes X. Revision of the systematics. J. Protozool. 11, 200–7.CrossRefGoogle ScholarPubMed
Hoare, C. A. & Wallace, F. G. (1966). Developmental stages of trypanosomatid flagellates: a new terminology. Nature, Lond. 212, 1385–6.CrossRefGoogle Scholar
Jaffe, J. J. & Doremus, H. M. (1963). Lewisi-like trypanosomes in the Short-tailed Shrew, Blarina brevicauda. Nature, Lond. 198, 556–8.CrossRefGoogle ScholarPubMed
Krampitz, H. E. (1961). Kritisches zur Taxonomie und Systematik parasitischer Saugetier-Trypanosomen mit besonderer Beachtung einiger der in Wühlmäusen verbreiteten spezifischen Formen. Z. Tropenmed. Parasit. 12, 117–137.Google Scholar
Laveran, A. & Franchini, G. (1913). Trypanosoma talpae chez Palaeopsylla gracilis. C. r. Séanc. Soc. Biol. 74, 1254–6.Google Scholar
Laveran, A. & Marullaz, M. (1913). Au sujet du Trypanosoma talpae. C. r. Séanc. Soc. Biol. 74, 1007–8.Google Scholar
Laveran, A. & Marullaz, M. (1914). Sur la nature des corps de Graham-Smith. Bull. Soc. Path. Exot. 7, 240–6.Google Scholar
Laveran, A. & Mesnil, F. (1904). Trypanosomes et trypanosomiases, 417 pp. Paris: Masson et Cie.Google Scholar
Lips, M. & Rodhain, J. (1956). Quelques hématozoaires de petits mammifères du HautKatanga. Ann. Parasit. Hum. Comp. 31, 481–8.CrossRefGoogle Scholar
[Nabarro, D.] (1907). Laveran, A. & Mesnil, F., Trypanosomes and trypanosomiases, 538 pp. (Translated and much enlarged byNabarro.) London: Baillière, Tindall and Cox.Google Scholar
Petrie, G. F. (1905). Observations relating to the structure and distribution of certain trypanosomes from Elstree in Hertfordshire. J. Hyg., Camb. 5, 194.CrossRefGoogle Scholar
Rodhain, J. (1930). Note sur l'existence en Belgique de trois représentants de trypanosomes de petites mammifères. C.r.Congr. natn. Sci., Brux. pp. 1215–17.Google Scholar
Rodhain, J., Pons, C., Van den Branden, F. & Bequaert, J. (1913). Notes sur quelques hématozoaires du Congo belge. Arch. Protistenk. 29, 259–78.Google Scholar
Taliaferro, W. H. (1923). A study of size and variability, throughout the course of ‘pure line’ infections, with Trypanosoma lewisi. J. exp. Zool. 37, 127–68.CrossRefGoogle Scholar
Taliaferro, W. H. (1926). Variability and inheritance of size in Trypanosoma lewisi. J. exp. Zool. 43, 429–73.CrossRefGoogle Scholar
Thomson, J. D. (1906). Blood parasites of the mole—including a new form of intracorpuscular parasite. J. Hyg., Camb. 6, 574–9.Google ScholarPubMed
Watson, E. A. & Hadwen, S. (1912). Trypanosomes found in Canadian mammals. Parasitology 5, 21–6.CrossRefGoogle Scholar
Wrublewski, K. (1912). Die Blutparasiten des Maulwurfes. Centralbl. Bakt. ParasitKde (I Abt. Orig.) 62, 140–3.Google Scholar