Concentration effects of Winogradskyella sp. on the incidence and severity of amoebic gill disease.
To study the concentration effects of the bacterium Winogradskyella sp. on amoebic gill disease (AGD), Atlantic salmon Salmo salar were pre-exposed to 2 different doses (10(8) or 10(10) cells 1(-1)) of Winogradskyella sp. before being challenged with Neoparamoeba spp. Exposure of fish to Winogradskyella sp. caused a significant increase in the percentage of AGD-affected filaments compared with controls challenged with Neoparamoeba only; however, these percentages did not increase significantly with an increase in bacterial concentration. The results show that the presence of Winogradskyella sp. on salmonid gills can increase the severity of AGD.
Embar-Gopinath
Sridevi
S
School of Aquaculture and Aquafin CRC, University of Tasmania, Locked Bag 1370, Launceston, Tasmania 7250, Australia. sembar@utas.edu.au
Crosbie
Philip
P
Nowak
Barbara F
BF
D000704:Analysis of Variance; D000818:Animals; D005393:Fish Diseases / Q000382:microbiology* / Q000469:parasitology / Q000473:pathology; D041965:Flavobacteriaceae / Q000302:isolation & purification / Q000502:physiology*; D005880:Gills / Q000382:microbiology / Q000469:parasitology / Q000473:pathology; D015994:Incidence; D016840:Lobosea / Q000302:isolation & purification / Q000472:pathogenicity*; D011528:Protozoan Infections / Q000382:microbiology / Q000473:pathology; D011529:Protozoan Infections, Animal; D020317:Salmo salar