alexa Interaction between Aeromonas salmonicida and peritoneal macrophages of brook trout (Salvelinus fontinalis).
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Olivier G, Eaton CA, Campbell N

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Abstract The phagocytic and bactericidal properties of peritoneal macrophages obtained from brook trout (Salvelinus fontinalis), injected with either glycogen or a modified Freund's complete adjuvant (MFCA), were evaluated against an avirulent and a virulent strain of Aeromonas salmonicida. Avirulent bacteria were effectively phagocytized and killed by macrophages obtained from fish injected with both irritants. With glycogen-elicited macrophages, no enhancement of killing was observed following opsonization of avirulent bacteria with specific antibodies. A killing index (K.I.) of 38 was obtained, compared to a K.I. of 39 for unopsonized bacteria. When avirulent bacteria were opsonized with complement, the K.I. was increased to 67. Virulent bacteria were less susceptible to the phagocytic and the bactericidal activities of glycogen-elicited macrophages, even after opsonization with antibodies and/or complement, K.I. of 9 to 15. In contrast, MFCA-elicited macrophages showed increased phagocytic and bactericidal activities against both strains. The K.I. of unopsonized virulent bacteria was increased to 47 and 46 compared to K.I. of 4 and 7 obtained with glycogen-elicited macrophages.
This article was published in Vet Immunol Immunopathol and referenced in Journal of Aquaculture Research & Development

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