Streptococcus iniae is among the major pathogens of a large number of fish
species cultured in fresh and marine recirculating and net pen production
systems. Ten Iranian medicinal plants were assessed for their antimicrobial
activity against Streptococcus iniae isolates obtained from diseased
Oncorhynchus mykiss (Salmonidae; Walbaum, 1972) collected from fish farms in
Iran. The antibacterial activity of ethanol extracts of Punica granatum,
Quercus branti, Glycyrrhiza glabra and essential oils of Heracleum
lasiopetalum, Satureja bachtiarica, Thymus daenensis, Myrtus communis,
Echinophora platyloba, Kelussia odoratissima and Stachys lavandulifolia
against Steptococcus iniae was evaluated by disc diffusion and serial
dilution assays. Most of the extracts and essential oils showed a relatively
high antibacterial activity against Streptococcus iniae. Of the plants
studied, the most active extracts were those obtained from the essential oils
of Satureja bachtiarica, Echinophora platyloba, Thymus daenensis and the
ethanol extract of Quercus branti. Some of the extracts were active against
Streptococcus iniae. Two essential oils showed lower MIC values; Heracleum
lasiopetalum (78 ?g/ml) and Satureja bachtiarica (39 ?g/ml). The essential
oil of Satureja bachtiarica could be an important source of antibacterial
compounds against the Streptococcus iniae isolated from rainbow trout.
Antimicrobial activity of
Satureja Khuzestanica
Jamzad and
Satureja bachtiarica
Bunge essential oils against
Shigella flexneri
and
Escherichia coli
in table cream containing
Lactobacillus plantarum
LU5
