Persistence of Veronaea botryosa in marine and freshwater microcosms and susceptibility evaluation to three disinfectants

Veronaea botryosa is a dematiaceous fungus and the causative agent of systemic mycosis known as “fluid belly’, one most important emergent diseases in sturgeon aquaculture. A better understanding pathogenesis disease requires knowledge environmental conditions that promote colonization, infection disease. In this study, both traditional cultured-based methods qPCR assays were used to evaluate V. persistence water microcosms at two different temperatures salinities, factors can predispose poikilotherm animals infection. Results indicate persisted significantly greater fresh than marine (p-values < .05). However, similarly 15 °C 25 salinities over 60 days without host. Furthermore, due lack effective preventive therapeutic combat fungal infections, proper disinfection aquaculture equipment facilities needed. To end, susceptibility three frequently disinfectants aquatic was investigated provide efficient biocide concentrations against botryosa. The results show dose least 75 mg/L iodine for 5 min, 390 household bleach 3.75% hydrogen peroxide 30 min are they applicable biosecurity protocols captive sturgeon.