Decontamination effect of electrolysed NaCl solutions on carp.
OBJECTIVE
To evaluate the efficacy of electrolysed NaCl solutions (EW) for disinfecting bacterial isolates from carp, and the potential application of EW to reducing the bacterial load in whole carp and carp fillets.


RESULTS
EW was produced by using a two-compartment batch-type electrolysed apparatus. Pure cultures (in vitro), whole carp (skin surface) and carp fillets were treated with EW to detect its antimicrobial effects. The anodic solution [EW (+)] completely inhibited growth of the isolates. Furthermore, dipping the fish samples in EW (+) reduced the mean total count of aerobic bacteria on the skin of whole carp and in fillets by 2.8 and 2.0 log(10), respectively. The cathodic solution [EW (-)] also reduced growth of the isolates from carp by ca 1.0 log(10). Moreover, the total counts of aerobic bacteria in whole carp (on the skin) and fillets were reduced by 1.28 and 0.82 log(10), respectively.


CONCLUSIONS
EW (+) has a strong bactericidal effect on bacteria isolated from carp.


CONCLUSIONS
Treatment with EW (+) could extend the shelf life of these fish.
Mahmoud
B S M
BS
Laboratory of Bioresources Chemistry, Graduate School of Fisheries Science, Hokkaido University, Minato, Hakodate, Japan. barakatsmm@yahoo.com
Yamazaki
K
K
Miyashita
K
K
Il-Shik
S
S
Dong-Suk
C
C
Suzuki
T
T
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects / Q000302:isolation & purification; D002347:Carps / Q000382:microbiology*; D015169:Colony Count, Microbial; D004572:Electrolysis; D005396:Fish Products / Q000382:microbiology*; D012965:Sodium Chloride / Q000737:chemistry / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D012965:Sodium Chloride