First evidence of the activity of an entomopathogenic fungus against the eggs of Sarcoptes scabiei
2021
Al Khoury, Charbel | Nemer, Nabil | Bernigaud, Charlotte | Fischer, Katja | Guillot, Jacques
The entomopathogenic fungus Beauveria bassiana has been successfully used for the control of phytopathogenic arthropods and there are a growing number of studies suggesting that this kind of fungus could also be used for the control of ectoparasites in mammals. This study evaluated for the first time the efficacy of different Beauveria strains against the eggs of Sarcoptes scabiei collected from experimentally infected pigs. Eggs were exposed to fungal conidia and monitored for hatching over 10 days. The strongest effect (28.75 % of hatching inhibition) was obtained with a commercial B. bassiana strain. Furthermore, the detection of fungal genomic within the surface-cleaned eggs demonstrated the ability of B. bassiana to penetrate and proliferate in the egg-shell of S. scabiei. This study provides the first evidence, using molecular techniques, that the development of mycoacaricides may be of interest for the control of S. scabiei infection.
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