抄録
From the begining to the end of July in 1977, a numerous number of akame (Liza akame) with skin ulcer had been observed in the estuary of the River Ashida in Fukuyama City.
Results of parasitological and bacteriological investigations made on 36 samples are summarized as follows.
1) A parasitic copepod, Caligus orientalis, was observed on the skin of all the specimens with one exception. The mean number of the worm per fish was about 27.
2) Various kinds of bacteria were isolated from the skin lesion. These were classified as Moraxella spp., Klebsiella sp., Citrobacter sp., Proteus vulgaris, Edwardsiella tarda, Vibrio spp., and Pseudomonas sp.
3) It was assumed that C. orientalis inflicted wounds on the body surface where the bacteria gained a foothold of invasion.
