Cyst Wall Ultrastructure of Two Sarcocystis spp. from European Mouflon (Ovis ammon musimon) in Germany Compared with Domestic Sheep

Odening, K.; Stolte, M.; Walter, G; Bockhardt, I.

doi:10.7589/0090-3558-31.4.550

Cited by 18 publications

(8 citation statements)

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“…No secondary cyst wall was observed in our study which was in agreement with V l e m m a s et al [35]. While in S. ar ieticanis, the cyst wall was thin and had long hair-like protrusions, which was similar to that described previously for this parasite [12,15,26].…”

Section: Shape Index Of the Cystssupporting

confidence: 93%

“…Our results were close to those recorded by T i n a k [33] We recorded that the cyst walls were 0.5-4 µm thick (the mean ± SD value was 1.547 µm ± 0.020). Similar results have been noted by O d e n i n g et al [26] who found that the cyst walls were 1.08 to 3.85 µm thick and T i n a k [33] who recorded 1.081 µm thick. From K u d i et al [17] the cyst-wall measured 2.4 µm.…”

Section: Shape Index Of the Cystssupporting

confidence: 89%

“…There are numerous detailed investigations on the morphology of Sarcocystis sp. from domestic sheep [15,26,27,28]. This paper describes the morphology of two microscopic species of sarcocysts; S. arieticanis and S. tenella in the muscles of two organs (oesophagus and diaphragm) of sheep slaughtered in the slaughterhouse of El Harrach in the north of Algeria.…”

Section: Introductionmentioning

confidence: 99%

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Morphometric Study of Microscopic Cysts of Sarcocystis Sp. in Sheep Carcasses

et al. 2020

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Muscular samples of the oesophagus and diaphragm of 335 sheep collected from the slaughterhouse of El Harrach were analyzed by the histopathological method to describe the morphology of two species of Sarcocystis: S. arieticanis and S. tenella. The cysts were counted and measured with a micrometer for their dimensions. A total of 895 cysts were measured. The width, length, shape index (length/width), the thickness of the wall and the length of the projections were recorded. The thick-walled cysts of S. tenella were 10—450 μm long (the mean ± SD value was 50.35 μm ± 1.380) and 1—110 μm (the mean ± SD value was 27.51 μm ± 0.533) wide. The cyst walls were 0.5—4 μm thick (the mean ± SD value was 1.547 μm ± 0.020) and provided with radial striations. The shape index was 1—14 μm (the mean ± SD value was 1.93 ± 0.045). While in the S. arieticanis, the cyst wall was thin and had long hair-like protrusions, the cysts measured 8—780 μm (the mean ± SD value was 123.13 μm ± 12.799) in length and 5—100 μm (the mean ± SD value was 37.00 μm ± 1.68) in width. The hair-like protrusions reached a length of 3—14 μm (the mean ± SD value was 5.428 ± 0.353) and the shape index was 1—17 μm (the mean ± SD value was 3.10 ± 0.281). For the length, the width and the shape index, the differences were statistically significant between thin-walled cysts and thick-walled cysts. The general structural features of the cysts, previously described by other authors, were confirmed.

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Section: Shape Index Of the Cystssupporting

confidence: 93%

Section: Shape Index Of the Cystssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Morphometric Study of Microscopic Cysts of Sarcocystis Sp. in Sheep Carcasses

et al. 2020

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“…S. miescheriana – known from wild boars 68 and domestic pigs 69 – had a prevalence of 40% in German wolves, consistent with the fact that wild boars contribute 18% of biomass to the German wolf diet 23 . In contrast, sequences sharing highest similarity with S. rangi, S. tenella, S. arieticanis, S. cruzi , and S. capracanis were detected more often than expected, since wolves usually do not commonly prey on reindeer 65 , mufflon 70 , domestic sheep 62 , cattle 71 or goats 72 , respectively. This discrepancy suggests either a lack of resolution in the sequenced gene fragment and that those sequences represent different – yet to be described – species, or that these described species have a broader intermediate host spectrum than previously thought.…”

Section: Discussionmentioning

confidence: 77%

Population expansion and individual age affect endoparasite richness and diversity in a recolonising large carnivore population

Lesniak

Heckmann

Heitlinger

et al. 2017

Sci Rep

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The recent recolonisation of the Central European lowland (CEL) by the grey wolf (Canis lupus) provides an excellent opportunity to study the effect of founder events on endoparasite diversity. Which role do prey and predator populations play in the re-establishment of endoparasite life cycles? Which intrinsic and extrinsic factors control individual endoparasite diversity in an expanding host population? In 53 individually known CEL wolves sampled in Germany, we revealed a community of four cestode, eight nematode, one trematode and 12 potential Sarcocystis species through molecular genetic techniques. Infections with zoonotic Echinococcus multilocularis, Trichinella britovi and T. spiralis occurred as single cases. Per capita endoparasite species richness and diversity significantly increased with population size and changed with age, whereas sex, microsatellite heterozygosity, and geographic origin had no effect. Tapeworm abundance (Taenia spp.) was significantly higher in immigrants than natives. Metacestode prevalence was slightly higher in ungulates from wolf territories than from control areas elsewhere. Even though alternative canid definitive hosts might also play a role within the investigated parasite life cycles, our findings indicate that (1) immigrated wolves increase parasite diversity in German packs, and (2) prevalence of wolf-associated parasites had declined during wolf absence and has now risen during recolonisation.

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“…However, S. cruzi was present in both domestic cattle and wood bison [ 13 ]. A Sarcocystis species was first identified from wild sheep ( Ovis musimon ) [ 14 ], and S. tenella and S. arieticanis were later identified from European Mouflon ( Ovis ammon musimon ) [ 15 ]. In this study, only microscopic sarcocysts were found in argali.…”

Section: Discussionmentioning

confidence: 99%

Sarcocystis species in wild and domestic sheep (Ovis ammon and Ovis aries) from China

Dong

Wang

et al. 2018

BMC Vet Res

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BackgroundSarcocystis species are intracellular protozoan parasites that can pose a threat to animal health and food safety. The aim of this study was to investigate the prevalence of infection with Sarcocystis infection in sheep from China.ResultsIn total, 52.51% (335/638) of tissue samples from domestic sheep contained sarcocysts through examination by light microscopy. The organisms were identified as S. tenella and S. arieticanis by molecular assays. Macroscopic S. gigantea and S. medusiformis were not found. The average sarcocysts loading was 18.07 ± 29.87 per square centimeter in the myocardium of domestic sheep. Furthermore, two specimens of argali (Ovis ammon) were examined and sarcocysts were found in the myocardium of one animal. According to the sequence of the cox1 gene of sarcocysts from argali, it was speculated as S. tenella.ConclusionsWe found a high prevalence and parasite load of Sarcocystis in sheep from both central and northwest China. This report is the first to indicate that argali may be a natural intermediate host for S. tenella.

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Cyst Wall Ultrastructure of Two Sarcocystis spp. from European Mouflon (Ovis ammon musimon) in Germany Compared with Domestic Sheep

Cited by 18 publications

References 0 publications

Morphometric Study of Microscopic Cysts of Sarcocystis Sp. in Sheep Carcasses

Morphometric Study of Microscopic Cysts of Sarcocystis Sp. in Sheep Carcasses

Population expansion and individual age affect endoparasite richness and diversity in a recolonising large carnivore population

Sarcocystis species in wild and domestic sheep (Ovis ammon and Ovis aries) from China

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