Modes of transmission of Loma salmonae (Microsporidia)

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...

Full description

Saved in:
Bibliographic Details
Published in:Diseases of aquatic organisms 1998-06, Vol.33 (2), p.151-156
Main Authors: SHAW, R. W, KENT, M. L, ADAMSON, M. L
Format: Article
Language:English
Subjects:
Animal aquaculture
Animal productions
Animals
Biological and medical sciences
Brackish
Fish Diseases - transmission
Fisheries
Fresh Water
Freshwater
Fundamental and applied biological sciences. Psychology
Gills - parasitology
Intestines - parasitology
Loma salmonae
Marine
Microsporida - physiology
Microsporidia
Microsporidiosis - transmission
Microsporidiosis - veterinary
Muscles - parasitology
Oncorhynchus kisutch - parasitology
Oncorhynchus tshawytscha
Parasitemia - parasitology
Parasitemia - veterinary
Pisciculture
Salmon - parasitology
Spores - physiology
Stomach - parasitology
Vertebrate aquaculture
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0177-5103
1616-1580
DOI:10.3354/dao033151