Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 23

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
In this article the author compares two final host of Diphyllobothrium latum, dog and man. Basing on the data of Le Basa (1924), Kuhlov (1955) and on her own observations the author states that the dog gets as easily infected as man. The extensiveness and intensity of the infection show but little differences in both of these hosts. However, the considerably longer lifetime of the parasite, its larger body dimensions and shorter sexual mature period in the human organism indicate to the man being the proper final host of Diphyllobothrium latum and the dog acting only as a substitute. The author's investigations do not confirm the opinion of Essex and Magath as to a very low percentage of the hatch of eggs coming from specimens which have a dog as host. In the author's experiments the average hatch of the eggs amounted to 50%. In the conclusion the author indicates to the well known phenomenon of principal hosts and substitutes (in the lower development phases - procercoid, pierocercoid) in the Pseudophyllidaea group and suggests the possibility of similar categories exsisting among the final hosts of D. latum.
The experiments were made with highly energetic compounds in adenosine, AMP, ADP and ATP series of Cyclops vicinus Ulj. homogenates, both infected and non-infected with Triaenophorus nodulosus (Pall.) larvae (by the 14-day of procercoid growth) as well as in homogenates of Triaenophorus nodulosus larvae immediately after hatching and after 2 days of free life in water. The ATP level was found to be higher than that of the remaining adenine compounds. ATP measurements in intermediate hosts showed quantitative differences between non-infected and infected Cyclops vicinus Ulj. (Fig. 3, 4); the latter showed a great increase in ATP and reduction in AMP content, this suggesting a higher intensity of highly energetic transformations in the host organisms during the developmental phase of the parasite. In the Triaenophorus nodulosus larvae, a decrease in ATP content could be seen after two days of free life in water (Fig. 2). This is likely to be a result of the exhaustion of reserve substances (polysaccharides and phospholipids) in the ciliated membrane of Coracidia.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.