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Cercarial Dermatitis in Austria Status of Research

Cercarial Dermatitis in Austria Status of Research. Christoph Hörweg 1 , Herbert Auer 2 & Helmut Sattmann 3 1 Institute of Zoology, Department of Systematic Zoology, University of Vienna, Austria

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Cercarial Dermatitis in Austria Status of Research

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  1. Cercarial Dermatitis in Austria Status of Research Christoph Hörweg1, Herbert Auer2 & Helmut Sattmann3 1 Institute of Zoology, Department of Systematic Zoology, University of Vienna, Austria 2 Department of Medical Parasitology, Clinical Institute of Hygiene and Medical Microbiology, University of Vienna 3 Department of Invertebrates, Natural History Museum Vienna, Austria

  2. Gernot Graefe (1971): „Experimenteller Nachweis einer von Cercarien verur-sachten Dermatitis am Neusiedlersee.“ (Sitzungsber. d. Österr. Akad. d. Wissenschaften, Mathemat.-naturw. Kl., Abt. 1, 179: 73-79) Cercarial Dermatitis in AustriaFirst Record Trichobilharzia szidati

  3. Cercarial Dermatitis in AustriaGeographical Distribution S V T • Vorarlberg: • no data • Tyrol: • Natterersee (1992):CD,Furcocercariae • Salzburg: • Wallersee, Wolfgangsee (1994):CD • Badesee Gastein (2002): CD • Wallersee (2002):Trichobilharziasp.(Stagnicola fuscus) T

  4. Cercarial Dermatitis in AustriaGeographical Distribution UA • Upper Austria: • Attersee (1992):CD • Some lakes around Linz (2002): CD • Carinthia: • Wörthersee, Weißensee, etc. (1950 – 90):CD • Herzogstuhl (2002):ocellate Furcocercariae(Gyraulus parvus) • Styria: • Some lakes around Graz (1994):CD,Trichobilharzia ocellata (Radix auricularia) • Weihermühle (2002):CD, Furcocercariae St C

  5. Cercarial Dermatitis in AustriaGeographical Distribution V B • Burgenland: • Neusiedlersee (1968-70):CD,T. szidati(L. stagnalis), Bilharziella polonica(Planorbarius corneus) • Neusiedlersee (1998):B. polonica(P. corneus) • Vienna: • Lobau (1983): CD, T. ocellata(L. stagnalis) • Lobau (1993, 1994): CD, Furcocercariae • Ölhafen (1997): T. ocellata(L. stagnalis, R. ovata) • Alte Donau (2001, 2002): CD • Neue Donau (2003): CD

  6. Cercarial Dermatitis in AustriaGeographical Distribution LA • Lower Austria: • Fischamend/Donau (1971): CD,T. szidati(L. stagnalis) • Sitzenberg (1973):CD,T. szidati(L. stagnalis, R. auricularia) • St. Veit a.d. Gölsen (1983): CD • Stopfenreuther Au (1994): CD • Wienerwald/Rekawinkel (1998):T. szidati(L. stagnalis) • Schönau/Donau (1998):Trichobilharzia sp.(R. peregra) • Mannswörth (2002):T. sp.(Stagnicola fuscus) • Achau (2002):CD • Fischamend/Donau (2002):T. sp.(Aplexa hypnorum)

  7. Causative agents: Bilharziella polonica Trichobilharzia szidati Trichobilharzia ocellata (?) Trichobilharzia sp. (?) Intermediate Hosts: Lymnaea stagnalis Radix auricularia R. ovata Stagnicola fuscus Planorbarius corneus Gyraulus parvus Aplexa hypnorum Final hosts: ? Cercarial Dermatitis in Austria Summary - Status 2003

  8. Date: 21.06.2002, Time: 2 p.m., Weather: hot & sunny Cercarial Dermatitis in AustriaAlte Donau / Vienna 2002 32°C 27°C

  9. Number of snails: 86 (from 6 collection sites) 6 Radix sp., 36 Planorbis planorbis 23 Bithynia tentaculata, 20 Physa acuta => no cercariae found with “cercarial release experiments” Conclusion: more local/specific collections (dependent on occurrence of cercarial dermatitis) needed Sample size should be extended Cercarial Dermatitis in AustriaAlte Donau / Vienna 2002

  10. Date: 03.07.2002 Time: 2 p.m. Weather: sunny + windy Cercarial Dermatitis in AustriaAchau / Lower Austria 2002 27°C 25°C

  11. Cercarial Dermatitis in AustriaAchau / Lower Austria 2002

  12. Cercarial Dermatitis in AustriaAchau / Lower Austria 2002 • Number of snails: 4 (collected one week before) • 4 Radix ovata • => only echinostome cercariae found • => but massive CD • Conclusion: • Snail population maybe broken down after continuous heat (many empty shells) or snails in mud in deeper regions (2,5 – 3 metres)

  13. Date: 11.06.2003 Time: 2.30 p.m. Weather: hot & sunny Cercarial Dermatitis in AustriaWöllersdorf / Lower Austria 2003 34°C 24°C

  14. Number of snails: 83 (collected the last days) 63 Planorbarius corneus 5 Lymnaea stagnalis, 3 Stagnicola sp., 1 Radix sp. => no cercariae found with “cercarial release experiments” Conclusion: Sample size should be extended, most likely some more snails are within the many water plants Cercarial Dermatitis in AustriaWöllersdorf / Lower Austria 2003

  15. A specific PCR for the amplification of the ITS regions and 5.8S rRNA gene from cercariae and sporocysts in the digestive glands of snails has been established. High sequence similarities of isolates within each host species and significant dissimilarities between isolates of different host species could be determined. Cercarial Dermatitis in AustriaMolecularbiology – Preliminary results

  16. Cercarial Dermatitis in AustriaProject applied - Objectives

  17. Cercarial Dermatitis in AustriaProject applied - Objectives

  18. Cercarial Dermatitis in AustriaProject applied - Objectives

  19. THANKS FOR YOUR ATTENTION ! Cercarial Dermatitis in Austria NO MORE !

  20. VISIT THE NHM VIENNA !! NO MORE !

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