The potential role of the possum<i>(Trichosurus vulpecula)</i>as a transport host of<i>Toxocara canis</i>

Sweatman, Gordon K.

doi:10.1080/00480169.1962.33470

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Trichostrongylus colubriformis occurs in New Zealand possums (Sweatman & Williams 1962;Sweatman 1962b;Bowie & Bennett 1983) at prevalences ranging from 8 to 70%. Presidente (1984) suggested that T. colubriformis may replace Paraustrostrongylus trichosuri in possums that feed on farmland.…”

Section: Discussionmentioning

confidence: 99%

Internal and external parasites of possums (Trichosurus vulpecula) from forest and farmland, Wanganui, New Zealand

Stankiewicz

Jowett

Roberts

et al. 1996

New Zealand Journal of Zoology

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The methodology and results of a parasite survey of 209 possums from Wanganui, western North Island, in the spring of 1994 are described. No somatic protozoan parasites were detected, but 23% of possums had coccidia, Eimeria sp. oocysts Received 30 August 1995; accepted 23 February 1996 in their faeces. Prevalences of intestinal nematodes were: Parastrongyloides trichosuri (55%), Trichostrongylus spp. (59%), and Paraustrostrongylus trichosuri (2.4%). Only one animal was found infected with the cestode Bertiella trichosuri. It was demonstrated that prevalence of Parastrongyloides trichosuri was affected by age and habitat and Trichostrongylus spp. by habitat. Four species of external parasites were found: the mites Trichosurolaelaps crassipes (49%), Petrogalochirus dycei (65%), Atellana papilio (81%), and Murichirus anabiotus (32%). The parasite fauna of possums in New Zealand appears to be less diverse than that in their native Australia.

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Section: Discussionmentioning

confidence: 99%

Internal and external parasites of possums (Trichosurus vulpecula) from forest and farmland, Wanganui, New Zealand

Stankiewicz

Jowett

Roberts

et al. 1996

New Zealand Journal of Zoology

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“…Under natural conditions it may be expected that animals exposed to environments where dogs are common, e.g. a farm, could themselves become infected and harbour 2nd-stage T. canis larvae in their somatic tissues (Sprent, 1958;Sweatman, 1962;Sweatman, Henshall & Manktelow, 1962;Galvin, 1964). Adult dogs consuming the tissues of these animals, e.g.…”

Section: Discussionmentioning

confidence: 99%

Infections of Toxocara canis in dogs fed infected mouse tissues

Warren

1969

Parasitology

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Toxocara canis larvae infecting dogs undergo tracheal migration following their ingestion in an experimental intermediate host. Development of the parasite then proceeds to the adult stage in the small intestine. Adult dogs are therefore capable of distributing fertile T. canis ova which, if ingested, could cause larva mirans in humans and other animals.This work was financed by research grants from the University of Queensland and the National Health and Medical Research Council of Australia. The writer wishes to acknowledge the encouragement and criticism of Professor J. F. A. Sprent.

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“…Although the finding of immature eggs of Toxocara in the feces of marsupials is reported here for the first time, the contact of opossums with mature eggs of T. canis was reported in serological tests in Oceania (SWEATMAN, 1962). In the present report, the presence of a large population of free-living cats observed in the environment where the marsupials were captured, which is associated with a high percentage of feline stool samples that are positive for eggs of T. cati, may be related to the finding of eggs of this parasite in the feces of D. albiventris.…”

Section: Introductionmentioning

confidence: 99%

Toxocara cati (Nematoda: Ascarididae) in Didelphis albiventris (Marsupialia: Didelphidae) from Brazil: a case of pseudoparasitism

Pinto

Mati

Melo

2014

Rev. Bras. Parasitol. Vet.

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Eggs of Toxocara cati were found in the feces of Didelphis albiventris from a peridomestic urban environment in Brazil. Negative fecal tests following short-term captivity of the opossums, as well as the absence of ascaridids during necropsy, suggest the occurrence of pseudoparasitism. Implications of the findings for the epidemiology of toxocariasis are discussed.Keywords: Opossum, pseudoparasitism, Toxocara cati. ResumoOvos de Toxocara cati foram encontrados nas fezes de Didelphis albiventris oriundos de um ambiente peridomiciliar urbano no Brasil. A negatividade dos exames de fezes após um curto período de cativeiro dos gambás e a ausência de nematódeos ascaridídeos durante a necropsia sugerem a ocorrência de pseudoparasitismo. As implicações dos achados para a epidemiologia da toxocarose são discutidas.Palavras-chave: Gambás, pseudoparasitismo, Toxocara cati. Anthropogenic environmental changes have led to the overlap of habitats and increased contact between wildlife and domestic animals, which can result in the transmission of helminth species from these hosts (spillover), a phenomenon widely discussed in recent times (reviewed by DASZAK et al., 2000;THOMPSON, 2013). However, studies on the possible involvement of wild animals in the life cycle of parasites from domestic animals are comparatively scarce (THOMPSON, 2013).Among the wildlife animals affected by human-caused environmental changes is the white-eared opossum, Didelphis albiventris Lund, 1840, a marsupial with a high potential for adaptation to urban areas (CÁCERES, 2002;SOUSA et al., 2012). In these areas, there is considerable overlap of the habitat of these didelphids and domestic animals, such as cats and dogs. Although not well known, the possibility of parasite transmission between felines and marsupials is real. Moreover, the fact that opossums act as reservoir hosts of pathogens that are of medical and veterinary importance (THATCHER, 2006) should be considered as a warning.In this case report, during the coproparasitological analysis of two young specimens of D. albiventris (males, weighing about 400 g), immature eggs of Toxocara cati (SCHRANK, 1788), an ascaridid parasite of felids with a worldwide distribution, were found, characterizing cases of pseudoparasitism.The opossums, captured in December 2013 on the premises of the Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, were individually kept in cages containing food and water ad libitum for three days. All feces obtained during the captivity period were evaluated daily. Initially, the search for proglottids of cestodes and largersized nematodes that were possibly eliminated in the feces was performed macroscopically, and the fecal aliquots were processed using the spontaneous sedimentation method and analyzed by light microscopy. In parallel, samples of feces from cats (n = 12) obtained in the same habitat where opossums were caught were examined by the same parasitological method. The eggs of the helminths found we...

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The potential role of the possum(Trichosurus vulpecula)as a transport host ofToxocara canis

Cited by 4 publications

References 5 publications

Internal and external parasites of possums (Trichosurus vulpecula) from forest and farmland, Wanganui, New Zealand

Internal and external parasites of possums (Trichosurus vulpecula) from forest and farmland, Wanganui, New Zealand

Infections of Toxocara canis in dogs fed infected mouse tissues

Toxocara cati (Nematoda: Ascarididae) in Didelphis albiventris (Marsupialia: Didelphidae) from Brazil: a case of pseudoparasitism

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