Paragonimus westermani infection of freshwater crab Sundathelphusa philippina and melaniid snails in Cadacan River in Irosin, Sorsogon, Philippines

2021 ◽  
Author(s):  
Vachel Gay Paller ◽  
Jasmin Ayyah Samudio ◽  
Kim Louisse Patagnan ◽  
Lyle Santamaria ◽  
Alco Kenneth Tolentino ◽  
...  
Keyword(s):  
Freshwater Crab ◽  
Paragonimus Westermani

The route of infection of Paragonimus westermani (diploid type) cercariae in the freshwater crab, Geothelphusa dehaani

1991 ◽  
Vol 65 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Toshiyuki Shibahara
Keyword(s):  
Experimental Evidence ◽  
Oral Feeding ◽  
Freshwater Crab ◽  
Paragonimus Westermani ◽  
Route Of Infection

ABSTRACTThe different routes of infection of Paragonimus westermani (diploid type) in the freshwater crab, Geothelphusa dehaani, were experimentally confirmed by various methods. In all the experiments, P. westermani metacercariae were recovered from the muscles, gills and liver of the infected crabs with the cercariae, although they were smaller than those of naturally infected ones. This is the first experimental evidence that G. dehaani is infected by both oral feeding and percutaneous contact with P. westermani (diploid type) cercariae.

HISTOMORPHOLOGICAL CHANGES IN THE BRAIN IN RELATION TO OVARIAN CYCLE OF FRESHWATER CRAB, BARYTELPHUSA CUNICULARIS

2017 ◽  
Vol 23 (1) ◽  
Author(s):  
C.A. JAWALE
Keyword(s):  
Staining Intensity ◽  
Neurosecretory Cells ◽  
Ovarian Cycle ◽  
Secretory Product ◽  
Freshwater Crab ◽  
Intensity Index ◽  
Cytoplasmic Material ◽  
Histomorphological Changes ◽  
Cyclic Changes ◽  
The Brain

Ovarian maturation by neurosecretory cells in the brain of freshwater crab, Barytelphusa cunicularis have been examined. The histological scrutiny of the brain of Barytelphusa cunicularis related with three types (A, B and C) of neurosecretory cells, which are classified on the basis of size, shape and tinctorial characters. All these types of cells marked annual cyclic changes of cytoplasmic material in association with ovarian cycle. The activity of these cells has been correlated with the ovarian cycle. They are distinguishable by their size, nature locations, shape, nucleus position, cell measure and the secretory product in the cytoplasm. The result indicates that the neurosecretory A, B and C cells of the brain seen involved in the process of mating ovulation. The neurosecretory materials staining intensity index of these cells is described.

Ultrastructural studies on the surface of Paragonimus westermani metacercaria

1987 ◽  
Vol 25 (2) ◽  
pp. 129 ◽  
Author(s):  
Kyong Min Kim ◽  
Myoung Hee Ahn ◽  
Duk Young Min
Keyword(s):  
Paragonimus Westermani ◽  
Ultrastructural Studies
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