University of Khartoum

Activity of Scopulariopsis brevicaulis on Hyalomma anatolicum and Amblyomma lepidum (Acari : Ixodidae)

Activity of Scopulariopsis brevicaulis on Hyalomma anatolicum and Amblyomma lepidum (Acari : Ixodidae)

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Title: Activity of Scopulariopsis brevicaulis on Hyalomma anatolicum and Amblyomma lepidum (Acari : Ixodidae)
Author: Suleiman, Elham A.; Shigidi, M.T.; Hassan, S.M.
Abstract: Abstract: Ticks and Tick-Borne Diseases (TBDs) are widespread in the Sudan causing substantial losses in terms of morbidity, mortality, reduction of production and costs of control and treatment. Control of ticks is based mainly on chemical acaricides. The present study was conducted to evaluate the use of fungi as an alternative means of controlling ticks in Sudan to overcome their known drawbacks. Amblyomma lepidum ticks were collected from El Damazin abattoir in the Blue Nile State, Central Sudan to establish laboratory colonies. Ticks developed fungal growth and subsequently died. Scopulariopsis brevicaulis was isolated from scrapings taken from the white mat that covered tick's integuments after death following incubation at 27°C, RH 85%. They were cultured on Sabouraud’s and Brain heart infusion agar. Pure fungal culture was obtained. S. brevicaulis was isolated and its identification was based on macro and microscopic characteristics. Identification of the isolate was confirmed by biotechnical laboratory in Denmark. Metabolite profiling of the fungus culture filtrate was conducted on Thin Layer chromatography. Organic compounds were detected. Pathogenicity of the spore suspension and culture filtrate of the isolated fungus to larvae, nymph and adult stages of Hyalomma anatolicum and A. lepidum was investigated. High mortality to flat larvae and biotic potential of the adult were observed. Results obtained stimulate the use of S. brevicaulis metabolites as biological control agents for controlling ticks in Sudan. The study reports the first isolation of S. brevicaulis from A. lepidum in Sudan.
URI: http://khartoumspace.uofk.edu/123456789/21879


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