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Sateriale, D.; Scioscia, E.; Colicchio, R.; Pagliuca, C.; Salvatore, P.; Varricchio, E.; Grazia Volpe, M.; Paolucci, M.; Pagliarulo, C.
Letters in applied microbiology, January 2019, 2019-Jan, 2019-01-00, 20190101, Letnik: 68, Številka: 1Journal Article
This study purpose was to evaluate the in vitro inhibitory properties of Italian acacia honey extracts against pathogenic aquatic oomycete/fungal isolates that cause different diseases in crayfish, resulting in an elevated mortality rate. The antimycotic activity of acacia honey aqueous extracts was evaluated against the strain UEF88662 of Aphanomyces astaci (oomycete) and the strain SMM2 of Fusarium avenaceum (fungus). The extracts preparation was carried out with water by a cheap, not complex and organic solvent‐free procedure, with low environmental impact and the higher possibility of large‐scale reproducibility. The anti‐oomycete and antifungal activities were quantitatively evaluated by growth, survival and sporulation microbiological assays. The extracts displayed a dose‐dependent inhibitory efficacy on oomycete and fungal growth and survival, as well as on the production of oomycete and fungal spores. Supported by future in vivo studies, our results encourage the use of natural extracts like honey as innovative tools to counteract mycotic infections. Significance and Impact of the Study The continuous spread of aquatic fungal disease as the ‘crayfish plague’ and the ‘burn spot disease’ has severe ecological and commercial repercussions. Critical factor to prevent further spread is the availability of effective antifungals possibility derived from local natural resources to use in innovative strategies of control and eradication of these diseases. This study provides relevant information about the in vitro anti‐oomycete and antifungal activity of Italian acacia honey aqueous extracts against two highly infectious and dangerous pathogenic species, Aphanomyces astaci and Fusarium avenaceum, that are responsible for important crayfish diseases. Significance and Impact of the Study: The continuous spread of aquatic fungal disease as the ‘crayfish plague’ and the ‘burn spot disease’ has severe ecological and commercial repercussions. Critical factor to prevent further spread is the availability of effective antifungals possibility derived from local natural resources to use in innovative strategies of control and eradication of these diseases. This study provides relevant information about the in vitro anti‐oomycete and antifungal activity of Italian acacia honey aqueous extracts against two highly infectious and dangerous pathogenic species, Aphanomyces astaci and Fusarium avenaceum, that are responsible for important crayfish diseases.
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