In vitro entomopathogenic activity of Beauveria bassiana against Psoroptes spp. (Acari: Psoroptidae)

Veterinary Parasitology
M LekimmeB Losson

Abstract

An indigenous strain (IHEM 18747) of Beauveria bassiana (Balsamo) Vuillemin (Deuteromycetes) was evaluated for its in vitro entomopathogenic activity against the parasitic mite Psoroptes ovis Hering (Acari: Psoroptidae) from rabbits. The following aspects were evaluated: (1) effects of conidial concentration on the viability of adult females; (2) influence of the infection on the fertility, and on the hatchability of eggs; (3) and transmission of infection between mites, and from contaminated surface. Adult females immersed into increasing concentrations of conidia (10(4)-10(9)conidia ml(-1)) showed a dose-related susceptibility. At the highest concentration of conidia, LT50 was 1.6 days while LT50 of the controls reached 5.8 days. The fungus was able to sporulate on the body surface and 100% of the mites were covered with mycelium after immersion in solutions containing 10(7)-10(9)conidia ml(-1). One hundred percent of healthy mites exposed to infected cadavers or surfaces acquired the infection (LT50 reached 1.9 and 1.73 days, respectively, versus 6.1 and 5.1 days in controls, respectively). Egg laying was not reduced by the fungal infection but both the hatchability of the eggs and the life span of the emerging larvae were s...Continue Reading

References

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Citations

Apr 25, 2012·Veterinary Parasitology·Bertrand Jacques Losson
Dec 2, 2008·Journal of Invertebrate Pathology·B TaylorD Moore
Jul 30, 2014·Parasite Immunology·E J MarrS T G Burgess
Nov 28, 2009·Medical and Veterinary Entomology·H Rose, R Wall
Oct 16, 2010·Veterinary Parasitology·R Wall, P Bates
Jun 3, 2021·Biology·Valentina Virginia Ebani, Francesca Mancianti

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