[Original procreation or generational change? The investigation of cysticercus and tapeworms].
The doctrine of the abiogenesis postulated the origin of human and animal intestinal worms from "not complete digested ingesta". Indeed Peter Simon Pallas (1741-1811) defined already 1760 in his dissertation that endoparasitic worms reproduce themselves by eggs. But he characterised the nature of cysticercus as "pathologically degenerated tail bladder". In 1856 Rudolf Leuckart (1822-1898) paraphrased the alternation of generation with "marvellous metamorphoses and peculiar form of development". The Dane Johannes Japetus Smith Steenstrup (1813-1897) recognised finally the principle of the alternation of generation and Gottlob Friedrich Heinrich Küchenmeister (1821-1890), a physician at the Saxon city Zittau realised the special correlation between the alternate and end host of tapeworms. Both, Leuckart and Küchenmeister proved their insights by animal and human experimentations.
Geus
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D000818:Animals; D002589:Cestoda / Q000254:growth & development*; D002590:Cestode Infections / Q000266:history* / Q000469:parasitology / Q000662:veterinary; D003551:Cysticercosis / Q000266:history / Q000469:parasitology / Q000662:veterinary; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000266:history* / Q000469:parasitology / Q000662:veterinary; D013557:Switzerland; D001743:Urinary Bladder / Q000469:parasitology; D014730:Veterinary Medicine / Q000266:history