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Updated: Oct 23, 2025
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Rapid Evaluation of Toxicity of Chemical Compounds Using Zebrafish Embryos
Published on: August 25, 2019
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Testing Alternative Surface Disinfection Agents for Zebrafish (Danio rerio) Embryos
Adrienne A Winn1, Kevin A Prestia2, Samantha M Peneyra2
1NYU-Regeneron Postdoctoral Training Program in Laboratory Animal Medicine and Division of Comparative Medicine, New York University Langone Health, New York, NY;,
Summary
The combination of sodium chloride and potassium peroxymonosulfate (SCPP) at 50 ppm for 5 minutes offers a safer alternative for disinfecting zebrafish embryos, improving survival and hatching rates compared to traditional bleach methods.
Area of Science:
- Aquatic animal health
- Zebrafish model systems
- Biosecurity protocols
Background:
- Zebrafish embryo surface disinfection is crucial for preventing pathogen transmission.
- Sodium hypochlorite, a common disinfectant, can cause embryo mortality if not used correctly.
- Alternative disinfectants like chlorine dioxide and SCPP are effective for equipment but their effects on embryos are unknown.
Purpose of the Study:
- To evaluate the effects of four chlorine-containing agents on zebrafish embryo survival, hatching, and morphology.
- To determine optimal concentrations and exposure times for safe and effective embryo disinfection.
- To identify potential alternatives to sodium hypochlorite for zebrafish embryo surface disinfection.
Main Methods:
- Zebrafish embryos (6 and 24 hours postfertilization) were exposed to reagent-grade sodium hypochlorite, commercial-grade sodium hypochlorite, chlorine dioxide, and SCPP at 50 or 100 ppm for 5 or 10 minutes.
- Survival, hatching rate, and morphologic defect rate were assessed at 5 days postfertilization.
- Results were compared to age-matched controls and between different disinfectant groups.
Main Results:
- 24-hour postfertilization embryos exposed to 50 ppm SCPP for 5 minutes showed the highest survival and hatching rates with the lowest defect rate.
- SCPP at 50 ppm for 5 minutes resulted in a significantly higher hatching rate (100%) compared to reagent-grade sodium hypochlorite (23%).
- Chlorine dioxide at 50 ppm or higher caused significant mortality in both 6 and 24-hour postfertilization embryos.
Conclusions:
- SCPP solution at 50 ppm for 5 minutes is a promising alternative disinfectant for zebrafish embryos, enhancing survival and hatching.
- Chlorine dioxide is not recommended for zebrafish embryo surface disinfection due to high mortality rates.
- Further in vivo testing is required to confirm the efficacy of SCPP against common zebrafish pathogens.
