The cytochemical localization of lysosomal hydrolases in the digestive cells of littorinids and changes induced by larval trematode infection

1977 ◽  
Vol 53 (1) ◽  
pp. 115-122 ◽  
Author(s):  
M. N. Moore ◽  
D. W. Halton
Keyword(s):  
Lysosomal Hydrolases ◽  
Larval Trematode ◽  
Cytochemical Localization ◽  
Digestive Cells ◽  
Trematode Infection

The Ultrastructural Localization of Acid and Alkaline Phosphatase Via Sulfhydryl Reduction of a Nonosmiophilic Tetrazolium Salt to an Osmiophilic Formazan

1973 ◽  
Vol 31 ◽  
pp. 694-695
Author(s):  
W. Allen Shannon ◽  
Yoshinobu Hoshino ◽  
Arnold M. Seligman
Keyword(s):  
Alkaline Phosphatase ◽  
Acid Phosphatase ◽  
Metal Salt ◽  
Ultrastructural Localization ◽  
Enzymatic Activities ◽  
Tetrazolium Salt ◽  
Lysosomal Hydrolases ◽  
Cytochemical Localization ◽  
New Approach ◽  
Acid And Alkaline Phosphatase

The metal salt capture methods for acid phosphatase and alkaline phosphatase with numerous variations based principally on the Gomori method have been useful methods for direct cytochemical visualization of the enzymes. However, the possibilities of nonenzymatic deposition of reaction product, possible inhibition of enzymatic activities, and other suggested weaknesses of the methods which are found in the literature give reason to develop a new approach to the cytochemical localization of these enzymes. Other attempts along these lines have thus far been more or less partially successful. More recently Hanker et al. have demonstrated lysosomal hydrolases by the formation of osmium blacks based on synthetic substrates which initially deposit Hatchett's brown (cupric ferrocyanide) at the reactive sites. The synthetic substrate', 2-naph-thylthiolphosphate (NTP), developed by Seligman et al. to use in the demonstration of acid and alkaline phosphatase and subsequently used by Hanker et al.

Extensive Abnormalities in Larval Trematode Infection

1961 ◽  
Vol 47 (3) ◽  
pp. 445
Author(s):  
Kathleen L. Hussey ◽  
Walter B. Stahl
Keyword(s):  
Larval Trematode ◽  
Trematode Infection

Polymorphism in Velacumantus australis (Gastropoda : Potamididae) and its relationship to parasitism

1966 ◽  
Vol 14 (1) ◽  
pp. 49 ◽  
Author(s):  
WH Ewers ◽  
CR Rose
Keyword(s):  
Lower Incidence ◽  
Sexual Maturity ◽  
Age Groups ◽  
Larval Trematode ◽  
Trematode Infection ◽  
Balanced Polymorphism

Velacumantus australis is a common gastropod along the Australian coast. Samples of four populations were examined and the frequency of two banded forms was recorded. All brown-banded snails were small juveniles and these apparently die before reaching adolescence. White-banded snails occurred in all age groups and their frequency tends to be highest in juveniles and lowest in the oldest adults. White-banded snails have a much lower incidence of larval trematode infection than unbanded snails and also differ slightly in weight and in the onset of sexual maturity. It is suggested that these forms are maintained as a selectively balanced polymorphism.

Sign in / Sign up

Export Citation Format

Share Document