scholarly journals Extensive release of an antigen associated with the sporogonic stages of Myxobolus cerebralis (Myxozoa: Myxosporea) is detected by a heterologous antibody raised to Tetracapsuloides bryosalmonae (Myxozoa: Malacosporea)

2004 ◽  
Vol 51 (2-3) ◽  
pp. 215-220 ◽  
Author(s):  
David J. Morris ◽  
Mansour El-Matbouli ◽  
Alexandra Adams
Keyword(s):  
Myxobolus Cerebralis ◽  
Tetracapsuloides Bryosalmonae ◽  
Extensive Release ◽  
Heterologous Antibody

Propagated Fish in Resource Management

2004 ◽  
Keyword(s):  
Rainbow Trout ◽  
Infectious Hematopoietic Necrosis Virus ◽  
Fish Populations ◽  
Whirling Disease ◽  
Yersinia Ruckeri ◽  
Myxobolus Cerebralis ◽  
Infectious Hematopoietic Necrosis ◽  
Tetracapsuloides Bryosalmonae ◽  
Parasite Challenge

<em>Abstract.</em>—Laboratory challenges of two rainbow trout <em>Oncorhynchus mykiss </em>strains with <em>Myxobolus cerebralis </em>triactinomyxons confirm the resistance to whirling disease of the Hofer trout strain. Although the number of fish that became infected and developed clinical disease was similar for the Hofer and the Trout Lodge strains at all challenge doses, the median spore numbers were lower at all challenge doses for the Hofer rainbow trout. Parasite challenge doses required to produce lesions of high severity were 10-fold lower for the Trout Lodge strain (100 triactinomyxons) than the Hofer strain (1,000 triactinomyxons). Challenges of the Hofer strain with other common salmonid pathogens; the myxozoans <em>Ceratomyxa shasta </em>and <em>Tetracapsuloides bryosalmonae</em>, the bacterium <em>Yersinia ruckeri</em>, and the viruses Salmonid herpes-like virus type 1 and infectious hematopoietic necrosis virus demonstrate that the susceptibility of the Hofer strain was similar to what would be expected for other strains of rainbow trout, either domestic or wild. These pathogen challenges provide evidence that the Hofer trout present a low risk for introducing any pathogen that might be detrimental to native or established fish populations or further amplifying those that are endemic.

scholarly journals The impact of Tetracapsuloides bryosalmonae and Myxobolus cerebralis co-infections on pathology in rainbow trout

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohamed H. Kotob ◽  
Bartolomeo Gorgoglione ◽  
Gokhlesh Kumar ◽  
Mahmoud Abdelzaher ◽  
Mona Saleh ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Myxobolus Cerebralis ◽  
Tetracapsuloides Bryosalmonae ◽  
The Impact

Properties of Washed Human Platelets

1977 ◽  
Vol 37 (02) ◽  
pp. 291-308 ◽  
Author(s):  
Raelene L Kinlough-Rathbone ◽  
J Fraser Mustard ◽  
Marian A Packham ◽  
Dennis W Perry ◽  
Hans-Joachim Reimers ◽  
...  
Keyword(s):  
Major Effect ◽  
Human Platelets ◽  
Immune Serum ◽  
Immune Serum Globulin ◽  
Serum Globulin ◽  
Platelet Adherence ◽  
Low Concentrations ◽  
Induced Aggregation ◽  
Extensive Release ◽  
Protein Free Medium

SummaryWe have shown previously that washed human platelets resuspended in Tyrode solution containing albumin and apyrase maintain their disc shape and their ability to aggregate upon the addition of low concentrations of ADP, providing fibrinogen is added to the suspending medium. We have now examined their responses to other aggregating and release-inducing agents. Collagen, arachidonate, thrombin, immune serum globulin, the ionophore A 23, 187 and phytohaemagglutinin from Phaseolus vulgaris caused aggregation and release of granule contents. The response to adrenaline was variable. Serotonin caused the platelets to change shape but no aggregation or release occurred. Addition of a small amount of plasma was necessary for ristocetin-induced aggregation. Polylysine caused immediate platelet-to-platelet adherence with little or no release of granule contents. Responses to collagen or thrombin were greater in a modified medium containing magnesium but no calcium; in this medium, aggregation caused by ADP or polylysine was followed by the release of granule contents whereas these agents caused aggregation without release in a medium with both calcium and magnesium. When protein was omitted from the suspending medium, platelet aggregation in response to ADP was variable. In this medium, collagen and thrombin caused more extensive release than in the albumin-containing medium. Aggregation by polylysine was accompanied by release and extensive lysis in the protein-free medium. Thus, the composition of the final resuspending medium has a major effect on the responses of washed human platelets to aggregating agents.

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