Trypanosomes found in Canadian Mammals

Watson, Edmund; Hadwen, S.

doi:10.1017/s0031182000000044

Cited by 20 publications

(12 citation statements)

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“…Experimental evidence suggests that T. nabiasi is host specific, or at least restricted to lagomorphs, as laboratory rodents (guinea pigs, rats, mice) are not susceptible to infection (Ashworth et al . 1909; Petrie 1905; Watson & Hadwen 1912; Channon & Wright 1927; Grewal 1957; Holliman 1966).…”

Section: Introductionmentioning

confidence: 99%

The inadvertent introduction into Australia of Trypanosoma nabiasi, the trypanosome of the European rabbit (Oryctolagus cuniculus), and its potential for biocontrol

et al. 2005

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Wild rabbits (Oryctolagus cuniculus) in Australia are the descendents of 24 animals from England released in 1859. We surveyed rabbits and rabbit fleas (Spilopsyllus cuniculi) in Australia for the presence of trypanosomes using parasitological and PCR-based methods. Trypanosomes were detected in blood from the European rabbits by microscopy, and PCR using trypanosome-specific small subunit ribosomal RNA (SSU rRNA) gene primers and those in rabbit fleas by PCR. This is the first record of trypanosomes from rabbits in Australia. We identified these Australian rabbit trypanosomes as Trypanosoma nabiasi, the trypanosome of the European rabbit, by comparison of morphology and SSU rRNA gene sequences of Australian and European rabbit trypanosomes. Phylogenetic analysis places T. nabiasi in a clade with rodent trypanosomes in the subgenus Herpetosoma and their common link appears to be transmission by fleas. Despite the strict host specificity of trypanosomes in this clade, phylogenies presented here suggest that they have not strictly cospeciated with their vertebrate hosts. We suggest that T. nabiasi was inadvertently introduced into Australia in the 1960s in its flea vector Spilopsyllus cuniculi, which was deliberately introduced as a potential vector of the myxoma virus. In view of the environmental and economic damage caused by rabbits in Australia and other islands, the development of a virulent or genetically modified T. nabiasi should be considered to control rabbits.

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Section: Introductionmentioning

confidence: 99%

The inadvertent introduction into Australia of Trypanosoma nabiasi, the trypanosome of the European rabbit (Oryctolagus cuniculus), and its potential for biocontrol

et al. 2005

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“…T. iowensis Becker and Roudabush 1934 Citellus tridecimlineatus t.; Iowa; Becker and Roudabush 1934, 527. T. leporis-sylvaticusWatson 1912 Sylvilagus floridanus mallurus;Canada;Watson and Hadwen 1912, 22. T. lewisi (Kent 1882) Neotoma fu.scipes ma.crotus; California;Wood 1934, 497.…”

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confidence: 99%

The Parasites of Some North Carolina Rodents

Harkema¹

1936

Ecological Monographs

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“…It was tentatively identified as Trypanosoma soricis Hadwen, 1912 because of the great similarity between the organisms from the present study (Figs. 2 and 3) with the photomicrograph presented in the original paper (Watson and Hadwen 1912). Since the trypanosome was inadequately described, a more detailed description is presented.…”

Section: Resultsmentioning

confidence: 99%

“…However, some naturally infected animals kept their infections from 3 to 5 months postcapture. Discussion The trypanosome isolated from Blarina brevicauda was tentatively identified as Trypanosoma soricis because of its morphological similarity with the description and photomicrograph in Watson and Hadwen (1912). Since T. soricis was originally reported from Sorex vagrans in British Columbia, Canada, and since members of the subgenus Herpetosoma are generally very host specific (Hoare 1972), future cross transmissions and other studies may prove that the trypanosome from Blarina in Ontario is not T. soricis.…”

Section: Trypanosoma (Herpetosoma) Tamiasimentioning

confidence: 96%

Trypanosomes of small mammals in southern Ontario

Woo¹,

Grant²,

McLean³

1980

Can. J. Zool.

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1980. Trypanosomes of small mammals in southern Ontario. Can. J. Zool. 58: 567-571. Using the haematocrit centrifuge technique, 53 of 619 small mammals from seven areas in southern Ontario were found to be infected with three species of trypanosomes. Trypanosoma microti was found in 10 of 374 (2.7%) Microtus pennsylvanicus examined from two of five locations. Thirty-five of 102 (34%) of Tamias striatus from one area were infected with Trypanosoma tamiasi and over 94% (33 of 35) of the infected animals were juveniles. This would indicate that the trypanosome is primarily a parasite of juveniles. A trypanosome which was tentatively identified as Trypanosoma soricis was found in 8 of 36 (22%) Blarina brevicauda; it was recorded from two of four areas where the shrews were caught. A detailed description of the trypanosome was given because the original description was inadequate. No trypanosome was found in 74 Peromyscus maniculatus, 31 Mus musculus, and 2 Zapus hudsonius examined.Woo, P. T. K., D. R. GRANT et L. MCLEAN. 1980. Trypanosomes of small mammals in southern Ontario. Can. J. Zool. 58: 567-571. La technique de I'hematocrite par centrifugation a permis de constater que de 619 petits mammreres venant de sept regions du sud de ]'Ontario, 53 ttaient parasites par trois espbces de trypanosomes. Trypanosoma microti a ett trouvk chez 10 des 374 (2.7%) Microtus pennsylvanicus venant de deux des cinq localitis. Trente-cinq des 102 (34%) Tamias striatus d'une mkme rtgion Btaient infectes par des Trypanosoma tamiasi et plus de 94% (33 sur 35) des animaux infectes ttaient des animaux immatures. I1 semble donc que le trypanosome soit d'abord un parasite des petits. Un trypanosome, identifit sous toutes reserves comme Trypanosoma soricis, a ite trouve dans 8 des 36 (22%) musaraignes Blarina brevicauda examinees; ce parasite provient de deux des quatre regions d'origine des musaraignes. On trouveraici une description detaillee de ce trypanosome car la description originale s'est averee inadequate. Soixante-quatorze Peromyscus maniculatus, 31 Mus musculus et 2 Zapus hudsonicus etaient exempts de tout trypanosome. [Traduit par le journal]

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Trypanosomes found in Canadian Mammals

Abstract: Since 1906 trypanosomes have been found in ten species of mammals by officers of the Health of Animals Branch.

Cited by 20 publications

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The inadvertent introduction into Australia of Trypanosoma nabiasi, the trypanosome of the European rabbit (Oryctolagus cuniculus), and its potential for biocontrol

The inadvertent introduction into Australia of Trypanosoma nabiasi, the trypanosome of the European rabbit (Oryctolagus cuniculus), and its potential for biocontrol

The Parasites of Some North Carolina Rodents

Trypanosomes of small mammals in southern Ontario

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