. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 144 CALIFORNIA FISH AND CAME agglutinated by rabbit £ ictaluri antiserum from Auburn University, and by rabbit antiserum we produced against the type strain ATCC 33202 (Hawke et al. 1981). No agglutination was observed when these isolates were mixed with antiserum to E. tarda. Dr. J. A. Plumb, Department of Fisheries and Allied Aquaculture, Auburn University, confirmed the isolate from fingerling channel catfish as £. ictaluri by bioc
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 144 CALIFORNIA FISH AND CAME agglutinated by rabbit £ ictaluri antiserum from Auburn University, and by rabbit antiserum we produced against the type strain ATCC 33202 (Hawke et al. 1981). No agglutination was observed when these isolates were mixed with antiserum to E. tarda. Dr. J. A. Plumb, Department of Fisheries and Allied Aquaculture, Auburn University, confirmed the isolate from fingerling channel catfish as £. ictaluri by biochemical and serological tests. In spite of the oxytetracycline treatment, the disease spread to at least one other 5-acre hatchery pond, possibly due to transfer of infected fish by bird predators. Infected fish exhibited spiraling behavior or motionless hanging at the pond surface, as described by Hawke (1979). Isolations off. ictaluri were made from dead and moribund fish from pond Number Six on 1 July. Following increased drug and vitamin therapy, losses had essentially ceased by 9 July, 22 d after the outbreak of the disease. However, mortality from ESC often recurs after discontinuing medicated food (Plumb and Quinlan 1986). Hence, extended drug therapy was used at IVWH to prevent recurring mortality and spread of ESC to other ponds. No E. ictaluri were found in the 60 fish sampled from Hatchery Pond Number Two following drug therapy. % 0 i.»»ir^ # A. FIGURE 1. Leishman-Giemsa stained impression smear from infected channel catfish kidney at 1000X. Rod-shaped bacteria appear singly or within vacuoles of macrophages (arrow).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco,
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