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The aim of the study was to evaluate the influence of monovalent A.hydrophila and A. sobria vaccine on the induction of the protective immunity against the heterologous strains of Aeromonas genus in carp (C. carpio L.). Additionally, the level of immunity in carp after single and double vaccinations was compared. Separate groups of carp were immunised with 1S-95 (A.hydrophila) or 4R-96 (A.sobria)...
The purpose of the study was to evaluate an optimum dose of Aeromonas hydrophila and Aeromonas sobria antigens for the vacccination of carp (Cyprinus carpio L.) and to compare the effectiveness of the vaccination with the antigens inactivated with formalin or thermally and given intraperitoneally (ip) or by immersion (imm). The dose was evaluated with the use of formalin antigens. Doses ranging from...
The studies aimed to evaluate the effect of experimental Aeromonas hydrophila vaccine on the total number of leukocytes, the number of neutrophils and T-lymphocytes and the phagocytic activity of the neutrophils and monocytes of carp (Cyprinus carpio L). The vaccine was given intraperitoneally or in an 1-hour bath. The number of leukocytes and the phagocytic activity were examined several times during...
The studies were carried out on carps harvested from 10 various ponds in various seasons or the year. Several fish from each pond were infected with the pathogenic strain Aeromonas hydrophila and the number of diseased and dead fish and the signs or disease intensification in fish from each pond were evaluated. Other fish collected from the same ponds were subjected to number or thrombocytes, the...
Three groups of carps were kept for 6 to 12 weeks at 11°C, 16°C and 23°C. A portion of the fish from each group was infected with Aeromonas hydrophila. Experimental fish were subjected to evaluation of number of thrombocytes, the index of bacteria-thrombocyte adherence (IB-TA), the percentage of active thrombocytes (%AT) and the index of thrombocyte aggregation (ITA). Carps kept at 11℃ revealed the...
The taxonomy and virulence of four unknown bacterial isolates (11S9306, 16S9306, 12E9306, 13E9306) associated with erytrodermatitis-like symptoms of carp have been examined. The isolates differed from currently known bacteria pathogenic for carp. Characteristics of the isolates were nearly identical with those of Chromobacterium violaceum. Differences concern indole production and d-mannitol utilization...
The pathogenicity of 68 strains of A. hydrophila and 44 of A. sobria was assessed in two-year-old carp (Cyprinus carpio L.). The fish were selected from erythro- dermatitis-free farms and were adapted to the laboratory environment for one month; then they were infected with a subepidermal bacterial suspension. The inoculum contained 107 bacterial cells in 0,2 ml of 0.85 per cent beffered salt solution...
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