The antibacterial and physiological effects of pure and nanoencapsulated Origanum majorana essential oil on fish infected with Aeromonas hydrophila
| Autor: | Clarissa P. Frizzo, Jessyka Arruda da Cunha, Larissa Daiane Willrich de Melo, Cecília de Ávila Scheeren, Bernardo Baldisserotto, Bruno Henneman, Rodrigo de Almeida Vaucher, Viviane Pedroso Fausto, Agueda Castagna de Vargas |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Florfenicol 030106 microbiology Microbiology Nanocapsules law.invention 03 medical and health sciences chemistry.chemical_compound Fish Diseases law Origanum Oils Volatile Animals Immunologic Factors Food science Essential oil Catfishes biology Inoculation Chemistry biology.organism_classification Survival Analysis Aeromonas hydrophila 030104 developmental biology Infectious Diseases Treatment Outcome Antibacterial activity Gram-Negative Bacterial Infections Catfish |
| Zdroj: | Microbial pathogenesis. 124 |
| ISSN: | 1096-1208 |
| Popis: | This study evaluated the antibacterial activity of Origanum majorana essential oil (EOM) and nanocapsules of this oil (NOM) in silver catfish, Rhamdia quelen, infected with Aeromonas hydrophila, and addressed their effects on silver catfish hematological and metabolic parameters. Fish were inoculated with A. hydrophila (360 μL, at a concentration of 1.5 × 109 CFU mL−1) and submitted to 1 h daily baths with EOM (0 (control), 20 or 30 μL L−1), NOM (0 (control), 5 or 10 μL L−1) or a positive control containing florfenicol (30 μL L−1) called group Maxflor® for five consecutive days. All treatments improved the survival rate of the infected fish, but we suggest the treatment of A. hydrophila infections through daily baths with 20 μL L−1 EOM or 5 μL L−1 NOM for five consecutive days as these were the lowest effective concentrations tested. Silver catfish treated with EOM and NOM had higher lymphocyte levels, indicating stimulation of the immune system in these fish. The lowest liver glucose level was found in the group treated with the lowest concentration of NOM, and the lactate values in the liver and muscle of all groups were within the normal values reported for this species. In addition, nanocapsules required much less EOM to elicit effective antibacterial treatment. |
| Databáze: | OpenAIRE |
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