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Effects of hydrogen peroxide on clearance of formalin‐killed Flavobacterium branchiophilum from the gills of rainbow trout, Oncorhynchus mykiss (Walbaum)
Author(s) -
Derksen J. A.,
Ostland V. E.,
Ferguson H. W.
Publication year - 1999
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1046/j.1365-2761.1999.00141.x
Subject(s) - rainbow trout , gill , hydrogen peroxide , biology , clearance , flavobacterium , mucus , microbiology and biotechnology , salmo , ultrastructure , fish <actinopterygii> , respiratory system , bacteria , andrology , anatomy , fishery , ecology , biochemistry , medicine , pseudomonas , genetics , urology
The effect of hydrogen peroxide (H 2 O 2 ) treatment on the clearance of formalin‐killed Flavobacterium branchiophilum from the gills of rainbow trout was examined. In untreated control fish, clearance was characterized by a rapid initial phase, with 50% reduction in bacterial antigen in the first 12 h after exposure. The bacteria then cleared more gradually, with total clearance being achieved by 40 h. Treatment of fish with 100 p.p.m. H 2 O 2 did not influence bacterial clearance compared to untreated controls. Exposure for 1 h to H 2 O 2 concentrations ≤ 100 p.p.m. caused no detectable clinical signs or evidence of ultrastructural damage to the respiratory epithelium. However, levels in excess of this caused significant gill damage.