Document Detail

Modes of transmission of Loma salmonae (Microsporidia).
MedLine Citation:
PMID:  9722404     Owner:  NLM     Status:  MEDLINE    
Loma salmonae (Putz, Hoffman and Dunbar, 1965) Morrison and Sprague, 1981 (Microsporidia) causes prominent gill disease in pen-reared chinook salmon Oncorhynchus tshawytscha in the Pacific Northwest. Transmission of the parasite was examined by exposing Pacific salmon Oncorhynchus spp. to infectious spores by various routes: per os, intraperitoneal, intramuscular, and intravascular injection, by cohabitation with infected fish, and by placement of spores directly on the gill. All exposure methods led to infections except placement of spores on the gill. Putative sporoplasms were visible in epithelial cells of the alimentary canal within 24 h of per os exposure. L. salmonae may initially infect alimentary epithelial cells and then migrate into the lamina propia to access the blood stream. Positive results obtained by intravascular injection suggest that autoinfection from spores of ruptured xenomas in the endothelium may also occur. The cohabitation experiment demonstrates that fish may become infected by spores released from live fish.
R W Shaw; M L Kent; M L Adamson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Diseases of aquatic organisms     Volume:  33     ISSN:  0177-5103     ISO Abbreviation:  Dis. Aquat. Org.     Publication Date:  1998 Jun 
Date Detail:
Created Date:  1998-08-26     Completed Date:  1998-08-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8807037     Medline TA:  Dis Aquat Organ     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  151-6     Citation Subset:  IM    
Department of Zoology, University of British Columbia, Vancouver, Canada.
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MeSH Terms
Fish Diseases / transmission*
Fresh Water
Gills / parasitology
Intestines / parasitology
Microsporida / physiology*
Microsporidiosis / transmission,  veterinary*
Muscles / parasitology
Oncorhynchus kisutch / parasitology*
Parasitemia / parasitology,  veterinary
Salmon / parasitology*
Spores / physiology
Stomach / parasitology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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