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The Raccoon Dog (Nyctereutes Procyonoides) As Definitive Host for Sarcocystis Spp. of Reindeer (Rangifer Tarandus)

Mårhund (Nyctereutes procyonoides) sont endeuert for Sarcocystisarter frå rein (Rangifer tarandus).

Abstract

A raccoon dog (Nyctereutes procyonoides; Family: Canidae), was given cardiac muscle of reindeer infected with S. grueneri, and started shedding Sarcocystis sporocysts 10 days post feeding. The sporocysts measured 13.9 (12.4–15.7) × 10.1 (9.2–11.2) µm, and were excreted for at least 16 days. The raccoon dog is thus an additional definitive host for S. grueneri (Yakimoff & Sokoloff, 1934) Gjerde, 1984.

Another raccoon dog was given skeletal muscle infected with 4 species of Sarcocystis, none of which was S. grueneri. The raccoon dog started shedding Sarcocystis sporocysts on day 10 post feeding, and excreted sporocysts for at least 16 days. The sporocysts measured 14.0 (12.3–15.6) × 10.1 (9.2–11.2) µm, and are considered to be sporocysts of S. tarandivulpes Gjerde, 1984.

This is the first record of the raccoon dog as an experimental definitive host for Sarcocystis.

Sammendrag

Ein mårhimd (Nyctereutes procyonoides; Familie: Canidae) vart fôra med rå hjertemuskulatur frå 2 tamreinar frå Finnmark. I hjertemuskulaturen vart det berre påvist cyster av S. grueneri. Etter ein prepatentperiode pä 10 dagar tok mårhunden til å skilja ut oocyster og sporocyster av Sarcocystis med avføringa. Sporocystene målte i gjennomsnitt 13.9 (12.4–15,7) × 10.1 (9.2–11.2) µm, og vart framleis skilde ut dà forsøket vart avslutta 25 dagar etter den eksperimentelle fôringa. Pà grunnlag av dessa funna reknar ein mårhund som en devert for S. grueneri (Yakimoff & Sokoloff, 1934) Gjerde, 1984.

Ein annan mårhund vart fôra med rå bukmuskulatur frå dei same 2 reinane. Bukmuskulaturen inneheldt cyster av S. rangiferi, S. tarandi, S. tarandivulpes og S. hardangeri. Denne mårhunden tok til a skilja ut oocyster og sporocyster av Sarcocystis etter ein prepatentperiode på 10 dagar. Sporocystene målte i gjennomsnitt 14.0 (12.3–15.6) × 10.1 (9.2–11.2) µm, og vart skilde ut i minst 16 dagar. Ein reknar det for mest sannsynleg at desse sporocystene tilhøyrer S. tarandivulpes, då det tidlegare er vist at denne arta har hund og rev (Canidae) som endevertar.

Dette er fyrste gongen màrhund vert rapportert som endevert for Sarcocystis etter eksperimentell infeksjon.

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Gjerde, B. The Raccoon Dog (Nyctereutes Procyonoides) As Definitive Host for Sarcocystis Spp. of Reindeer (Rangifer Tarandus). Acta Vet Scand 25, 419–424 (1984). https://doi.org/10.1186/BF03547256

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