Investigations on the distribution of Schistosoma turkestanicum Skrjabin, 1913 (Trematoda: Schistosomatidae) infection of red deer in Hungary and a combined method for the detection of S. turkestanicum eggs in droppings

Abstract

Additional geographical distribution of the Central European populations of Schistosoma turkestanicum and the detectability of their eggs in droppings were investigated in red deer samples, because this rare species had previously been shown only in a single Hungarian habitat. Samples from visceral organs, intestinal contents, and droppings on the ground from 11 hunting areas of Hungary were investigated to find a new presence of this fluke. Close to the first site of detection in the Gemenc forest another habitat along the southern border of the country was found where the parasite lives in red deer. Therefore, it is possible that the worm also occurs in neighbouring Serbia or Croatia. Schistosoma turkestanicum causes a low-intensity infection in red deer and this host sheds low amounts of eggs, therefore the eggs are difficult to detect. Droppings were cleared by sedimentation, filtered by sieve screening and then the eggs were flotated using solutions with an increasing density of 1200 g/L, 1300 g/L, 1350 g/L, and 1400 g/L while they were being stained red with acid fuchsin. Eggs in fresh faeces can be most efficiently separated from plant fibres using a flotation solution of 1350 g/L density, but in some cases eggs in old dung can be detected using a solution of a specific gravity lower or higher than that. By combining the advantages of the three concentration processes, eggs of S. turkestanicum, which are more recognisable by the red stain, can be found in samples in which they are present at a density lower than 1/g.

Toll like receptors and their evolution in the lymnaeid freshwater snail species Radix auricularia and Lymnaea stagnalis, key intermediate hosts for zoonotic trematodes

“…In the Middle and Far East S. turkestanicum has been implicated in substantial loss in meat and milk yields and associated with significant morbidity and mortality in flocks and herds having considerable economic impact on the farming communities (Wang et al, 2009). In the past decade S. turkestanicum has also been identified in Central Eastern Europe and could represent a significant emerging disease of livestock (Juhász and Majoros, 2018). Similarly, lymnaeid snails represent a major group of vectors of food borne trematodiasis (FBT), including the zoonotic liver flukes Fasciola gigantica and Fasciola hepatica remain largely understudied.…”

A vadbiológiai-vadgazdálkodási tudományok története Magyarországon

“…Emberben a bőrgyulladáson kívül egyéb káros következmény nem írható az élősködő rovására. A métely köztigazdája a Radix auricularia vízi csiga (Juhász és Majoros 2018).…”