Baylisascaris schroederi
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| Baylisascaris schroederi | ||||||||||||
| ( McIntosh , 1939) |
Baylisascaris schroederi is a parasitic living worm from the order of the roundworms (Ascaridida).
Baylisascaris schroederi , like most roundworms, develops over several larval stages. Small animals can act as intermediate hosts and carriers. Development from egg to embryo takes two to four weeks and takes place outside of the host. In larger animals, the life cycle from Baylisascaris schroederi to the reproductive adult worm can be completed.
The roundworm is also increasingly affecting the giant panda . Originally it was likely transmitted from cats and other small animals. With the pandas becoming more restricted, intra-population transmission has become a problem. In 1990 10% of the animals were infested, today it is 50%. Baylisascaris schroederi is now the leading cause of death in wild giant pandas. The different larval stages attack different organs and cause severe bleeding in the liver, lungs and intestines. Why the worm particularly attacks the giant panda and causes fatal damage to this endangered species is not sufficiently well known. In a study by the Wildlife Conservation Society, changes in the climate are cited as the reason for the increasing spread of such parasites. In China, research is being carried out on vaccines against this type of ascariasis.
literature
- David E. Wildt, Anju Zhang, Hemin Zhang, Donald L. Janssen, and Susie Ellis: Giant Pandas: Biology, Veterinary Medicine and Management. Cambridge University Press, 2006, pp. 364-388 ISBN 978-0-521-83295-3
- Jin-Shuo Zhang, Peter Daszak, Hua-Li Huang, Guang-You Yang, A. Marm Kilpatrick and Shuyi Zhang: Parasite Threat to Panda Conservation. EcoHealth, 2007
Individual evidence
- ↑ Steve Sternberg: Parasite puts more pandas at risk. USA Today 2007
- ↑ Jeremy Hance: Climate change may trigger spread of disease from animals to people. mongabay.com of October 7, 2008
- ↑ Tao Wang, Guangzhi He, Guangyou Yang, Yuxiang Feia, Zhihe Zhang, Chengdong Wang, Zhi Yang, Jingchao Lan, Li Luo and Li Liu: Cloning, expression and evaluation of the efficacy of a recombinant Baylisascaris schroederi Bs-Ag3 antigen in mice . Vaccine, 26, 52, 9 pp. 6919-6924, December 2008