G. L. Bullock
A. Noble
R. C. Cipriano
1996
<div class=""><div class="article-section__content en main"><p>An asymptomatic carrier population of rainbow trout<span> </span><i>Oncorhynchus mykiss</i><span> </span>was examined for<span> </span><i>Aeromonas salmonicida</i><span> </span>by primary dilution counts on Coomassie Brilliant Blue agar and also by streaking on bacteriological media after a 24–48-h pre-enrichment in tryptic soy broth. The pathogen was detected by primary dilution plate counts in 1 spleen, 15 gill, and 19 mucus samples of the 100 trout examined.<span> </span><i>Aerornonas samonicida</i><span> </span>was detected only after 48-h preenrichment in the one spleen that had already tested positive via primary dilution counts. The pathogen was not detected in kidney, liver, and intestinal samples. The occurrence of the pathogen in mucus and gills suggests a predominantly external nature of asymptomatic carriage of<span> </span><i>A. salmonicida</i><span> </span>within this population of fish. Repeated examination of fluidized biofilters and tank water showed that<span> </span><i>A. salmonicida</i><span> </span>did not become established in the recirculation system.</p></div></div>
application/pdf
10.1577/1548-8667(1996)008<0047:NOASCO>2.3.CO;2
en
American Fisheries Society
Nature of Aeromonas salmonicida carriage on asymptomatic rainbow trout maintained in a culture system with recirculating water and fluidized sand biofilters
article