The present work studied the resistance of the "Jundiá" (Rhamdia quelen), after intramuscular inoculation with 1.3 x 10(9) and 3.5 x 10(8) UFC (Unity Formation of Colony) suspension of Aeromonas hydrophila/m<img border=0 id="_x0000_i1028" src="/img/revistas/cr/v31n3/a24img01.gif"> saline solution. Thirty two fish of a total of 96 utilized fish served as control that werw inoculated with saline solution. Fish were distributed in six amianthus aquarium. After inoculation, fish submitted to bacterial suspensions showed behaviour changes and apathy at the botton of aquarium. One hundred percent of mortality was observed 24 hours after inoculation. In conclusion, 1.3 x 10(9) and 3.5 x 10(8)UFC/m<img border=0 id="_x0000_i1029" src="/img/revistas/cr/v31n3/a24img01.gif"> saline solution were lethal for this species of fish.
Rhamdia quelen; Aeromonas hydrophila; fish; inoculation
