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Updated: Feb 10, 2026
09:06
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
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Bacillus thuringiensis Cry5B protein as a new pan-hookworm cure.
Yan Hu1, Thanh-Thanh Nguyen1, Alice C Y Lee2
1Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
Summary
A novel treatment using Bacillus thuringiensis (Bt) Cry5B shows high efficacy against all tested hookworm species in animal models. This pan-hookworm anthelmintic offers a promising new therapy for widespread parasitic infections.
Area of Science:
- Parasitology
- Microbial Therapeutics
- Drug Discovery
Background:
- Hookworm infections affect nearly half a billion people globally, causing significant health issues like iron-deficiency anemia, particularly in vulnerable populations.
- Current mass drug administration relies heavily on albendazole, which exhibits variable cure rates and raises concerns about parasite resistance.
- There is an urgent need for new, effective anthelmintic treatments to combat the substantial global burden of hookworm infections.
Purpose of the Study:
- To evaluate the efficacy of Cry5B, a protein from Bacillus thuringiensis (Bt), against various hookworm species, including human and animal parasites.
- To determine if Cry5B's efficacy is influenced by host immune responses or repeated administration.
- To assess the potential of Cry5B as a broad-spectrum anthelmintic for hookworm infections.
Main Methods:
- Testing Cry5B efficacy against Ancylostoma caninum in dogs and Necator americanus in hamsters, expanding on previous studies with Ancylostoma ceylanicum.
- Investigating the impact of stomach acid neutralization on Cry5B's therapeutic effectiveness.
- Assessing the independence of Cry5B's anti-nematode activity from the host immune system and its stability with repeated dosing.
Main Results:
- Cry5B demonstrated high efficacy against all hookworm parasites tested across different animal models.
- Neutralizing stomach acid significantly enhanced the efficacy of Cry5B, suggesting a practical method for improving treatment outcomes.
- The therapeutic effect of Cry5B was found to be independent of the host immune system and unaffected by repeated administration.
Conclusions:
- Bacillus thuringiensis (Bt) Cry5B is a potent pan-hookworm anthelmintic effective against major human and animal hookworm species.
- Cry5B exhibits favorable properties for therapeutic application, including enhanced efficacy when stomach acid is neutralized and independence from host immunity.
- This study supports the development of Bt Cry5B as a novel and effective treatment for widespread hookworm infections in both humans and animals.
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