Differences in the susceptibility of some penaeid prawn species to gill-associated virus (GAV) infection.
Four species of penaeid prawn cultured in Australia (Penaeus monodon, Penaeus esculentus, Marsupenaeus japonicus and Fenneropenaeus merguiensis) were injected with a virulent preparation of gill-associated virus (GAV). P. monodon (average weight = 8.9, 13.9 and 19.2 g), P. esculentus (average weight = 19.5 g), F. merguiensis (average weight = 10.5 g), and small (average weight = 5.8 g) M. japonicus displayed overt signs of disease and mortalities which reached 82 to 100% within 23 d post-injection. Cumulative mortalities in P. esculentus and F. merguiensis were significantly lower than for P. monodon of the same size class. Medium (average weight = 13.0 g) M. japonicus also developed overt signs of disease but cumulative mortalities were not significantly higher than uninfected controls. Large (average weight = 20.3 g) M. japoncius did not display symptoms of disease and there were no significant mortalities up to 23 d post-injection.
Spann
K M
KM
Co-operative Research Centre for Aquaculture, CSIRO Tropical Agriculture, Queensland, Australia. kirsten.spann@tag.csiro.au
Donaldson
R A
RA
Cowley
J A
JA
Walker
P J
PJ
D000818:Animals; D033364:Decapoda / Q000235:genetics / Q000821:virology*; D020022:Genetic Predisposition to Disease; D005880:Gills / Q000821:virology*; D011793:Queensland; D012328:RNA Viruses / Q000254:growth & development* / Q000472:pathogenicity; D016019:Survival Analysis