Antimicrobial activity of essential oils from Lippia sidoides, Ocimum gratissimum and Zingiber officinale against Aeromonas spp.

Study of the chemical composition and ecotoxicological evaluation of essential oils in Daphnia magna with potential use in aquaculture

“…In general, interest in aquaculture in the genus Lippia has increased mainly due to its potential sedative and anaesthetic properties. Compounds such as thymol and carvacrol, commonly present in this genus, have strong antimicrobial action (Majolo et al, 2017;Monteiro et al, 2020;Teles et al, 2010), and thymol is also considered a positive allosteric regulator of Gaba A receptors, with a similar action as sedatives and commercial anaesthetics (Johnston et al, 2006). Some studies have shown positive results with the application of the genus Lippia in aquaculture (Brandão et al 2021;Salbego et al, 2017).…”

Short‐term baths with essential oils of Lippia sidoides , Ocimum gratissimum and Zingiber officinale influence blood parameters and survival of tambaqui ( Colossoma macropomum ) after infection with Aeromonas hydrophila

“…Among the essential oils evaluated in this study, the EO of Z. officinale was least effective, with the lowest survival rates (47.9 and 52.1%, with 5.0 and 10 mg L −1 of the EO) of tambaqui after infection with A. hydrophila, compared with positive and negative control. Monteiro et al (2021) reported that in the in vitro assays, the essential oil of Z. officinale also showed moderate to weak antimicrobial activity against different isolates of Aeromonas spp. The weak antibacterial activity of this oil could be attributed to the oxygenated chemical structures of the compounds borneol, 1,8-cineole, α-pinene and camphene present in the essential oil of Z. officinale.…”

“…One promising alternative for treating bacterial diseases consists in the use of medicinal plants, in the form of essential oils, extracts or isolated compounds (da Cunha et al, 2018). The essential oils (EOs) of these plants present a wide range of biologically active compounds that have been shown antimicrobial and immunostimulatory action, among others, with notable results in the prevention and control of diseases in fish farming (Chagas et al, 2020; da Cunha et al, 2018; Monteiro et al, 2021; Monteiro et al, 2020).…”

“…Its leaves and flowers produce an essential oil with high thymol and carvacrol content. These two phenolic terpenes have strong antimicrobial, insecticidal, larvicidal and fungicidal activity (da Cunha et al, 2018; Lorenzi & Matos, 2008; Monteiro et al, 2021).…”

“…It is important to emphasize that the plants L. sidoides, O. gratissimum and Z. officinale were selected to be tested in this assay because they presented good results in the in vitro test against isolates of Aeromonas spp. when used in the form of both ethanolic extract and essential oil (Monteiro et al, 2021;.…”