Bovine infectious mastitis is largely resistant to antibacterial treatment, mainly due mechanisms of bacterial resistance in the biofilms formed by Staphylococcus aureus. Melaleuca (MEO) and citronella essential oils (CEO) are promising agents for reducing or eliminating biofilms. Free melaleuca oil presented a medium Minimum Inhibitory Concentration (MIC) 0.625% Bactericidal (MBC) 1.250%, whil...

AIMS To compare the bacteriostatic and bactericidal activity of 13 chemotyped essential oils (EO) on 65 bacteria with varying sensitivity to antibiotics. METHODS AND RESULTS Fifty-five bacterial strains were tested with two methods used for evaluation of antimicrobial activity (CLSI recommendations): the agar dilution method and the time-killing curve method. EO containing aldehydes (Cinnamom...

Tannins and related polyphenols have been reported to produce diverse biological effects that indicate their therapeutic potential, including antioxidative, antibacterial, and antiviral activities. In an exploratory study of natural antioxidants with biological effects, we investigated the tannin constituents of myrtaceous plants reported to be rich in polyphenols. We isolated 16 new compounds ...

In the methods on page 112, we report a “cytological” estimate of 710 Mb based flow cytometry for Melaleuca alternifolia. For clarity, this should have been qualified as “2C” or diploid genome size.

Melaleuca bracteata is a yellow-leaved tree belonging to the Melaleuca genus. Species from this genus are known to be good sources of natural antioxidants, for example, the "tea tree oil" derived from M. alternifolia is used in food processing to extend the shelf life of products. In order to determine whether M. bracteata contains novel natural antioxidants, the components of M. bracteata etha...

HIGHLIGHTS • A strain of Penicillium citreosulfuratum was isolated from corroded metal. The fungus formed biofilm on the surface aluminum wire. This grew in presence 50 mM Al3+ liquid medium. Thyme, oregano, and melaleuca essential oils inhibited this growth.

OBJECTIVE To evaluate the larvicidal activity of Azadirachta indica, Melaleuca alternifolia, carapa guianensis essential oils and fermented extract of Carica papaya against Aedes aegypti (Linnaeus, 1762) (Diptera: Culicidae). METHODS The larvicide test was performed in triplicate with 300 larvae for each experimental group using the third larval stage, which were exposed for 24h. The groups wer...

The melaleuca psyllid, Boreioglycaspis melaleucae (Hemiptera: Psyllidae), was introduced to Florida as a biological control agent against Melaleuca quinquenervia, an invasive evergreen tree that has invaded large areas of Florida Everglades. Colonies of B. melaleucae nymphs are normally covered by white waxy secretions, and nymphs of various instars produce long bundles of white waxy filaments ...

Piedra, is an asymptomatic fungal infection of the hair shaft, resulting in the formation of nodules of different hardness on the infected hair. The infection also known as Trichomycosis nodularis is a superficial fungal infection arising from the pathogen being restricted to the stratum corneum with little or no tissue reaction. The nodules are a concretion of hyphae and fruiting bodies of the...

Austropuccinia psidii, the fungus causing myrtle rust, was detected in Western Australia for first time June 2022. Few Australian plant species have been screened response to pathogen. Melaleuca thyoides, marginata and leucadendra grown from seeds sourced populations were all highly susceptible an isolate of pathogen eastern Australia.