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.