Jg. Daly et al., PROTECTION AGAINST CARP ERYTHRODERMATITIS FOLLOWING BATH OR SUBCUTANEOUS EXPOSURE TO SUBLETHAL NUMBERS OF VIRULENT AEROMONAS-SALMONICIDA SUBSP NOVA, Journal of fish diseases, 17(1), 1994, pp. 67-75
A bath challenge system was used to infect carp, Cyprinus carpio L., w
ith Aeromonas salmonicida subsp. nova, the causative agent of carp ery
throdermatitis. Bath-challenged fish became infected with the bacteriu
m exhibiting typical signs of the disease. Carp that were sublethally
bath exposed became infected and exhibited some skin lesions, but afte
r one week, these quickly healed and the animals fully recovered from
the infection. Naive fish that had not been previously exposed to the
bacterium had mortalities of 100% when infected by the subcutaneous ro
ute and 40-60% by the bath route of infection. Carp that received subl
ethal infections were able to withstand subsequent lethal infections a
nd recover regardless of the route of infection. Sublethally bath-expo
sed carp were protected from subsequent lethal challenges of A. salmon
icida subsp. nova for at least 5 months.