AI Article Synopsis
- Bacillus thuringiensis (Bt) is a microorganism known for its effectiveness against insects, though its impact on tick populations is not fully understood.
- In experiments with four environmental strains and a commercial product (Vectobac), Vectobac was found ineffective, while two environmental strains showed an 80% tick mortality rate against Ixodes ricinus and Dermacentor reticulatus.
- The study also suggested that the similarity in enzymatic profiles between effective and less effective strains indicates that the enzymes tested may not play a significant role in how these strains affect ticks.
Article Abstract
Bacillus thuringiensis is a highly specific entomopathogenic microorganism. Although defined as having properties which work against insects, its role in the control of tick populations is still insufficiently known. In our bioassay, four environmental strains of B. thuringiensis, along with one commercially available product (Vectobac), have been used against ticks. Vectobac turned out to be ineffective in the biocontrol of ticks; however, two of environmental B. thuringiensis strains proved to be efficient against both Ixodes ricinus and Dermacentor reticulatus. In those cases, the mortality rate for ticks was assessed as being up to 80%, and LC ranged between 9.1 × 10 and 1.3 × 10 (cfu/ml). Dermacentor reticulatus males were the most sensitive to bacteria. The similarity between the most and least efficient B. thuringiensis strains in enzymatic profiles-including lipases, phosphatases, proteases, and chitinases-may indicate a limited role of detected enzymes in the pathogenicity profile of bacterial strains against ticks.
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| http://dx.doi.org/10.1007/s00436-018-6096-z | DOI Listing |
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