Cryptosporidium parvum inactivation from short durations of treatment with ozonated water produced by an electrolytic generation system

Cryptosporidium is a waterborne pathogen that causes diarrhea in vertebrates and humans (mainly C. hominis and C. parvum ). Ozone (O 3 ) is a powerful disinfectant due to its high oxidative characteristics, and it is used to inactivate microorganisms in drinking water. As an alternative to the gas d...

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Bibliographic Details
Published in:Parasitology research (1987) 2024-11, Vol.123 (11), p.371-371, Article 371
Main Authors: Matsubayashi, Makoto, Haraguchi, Asako, Morisaki, Manami, Ikadai, Hiromi, Teramoto, Isao, Kido, Yasutoshi, Kaneko, Akira
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Computed tomography
Cryptosporidium
Cryptosporidium parvum
Cryptosporidium parvum - drug effects
Diarrhea
Disinfectants
Disinfectants - pharmacology
Disinfection - methods
Dissolution
Drinking water
dyes
Electrolysis
electron microscopy
excystation
Immunology
Medical Microbiology
Microbiology
Microscopy, Electron, Scanning
Oocysts
Oocysts - drug effects
oxygen
ozonation
Ozone
Ozone - pharmacology
pathogens
Protozoa
Scanning electron microscopy
Time Factors
viability
Water - chemistry
Water - parasitology
Water Purification - methods
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Summary:Cryptosporidium is a waterborne pathogen that causes diarrhea in vertebrates and humans (mainly C. hominis and C. parvum ). Ozone (O 3 ) is a powerful disinfectant due to its high oxidative characteristics, and it is used to inactivate microorganisms in drinking water. As an alternative to the gas dissolution system for producing ozone from oxygen, a simpler electrolytic ozone generation system has recently been developed. In the present study, the efficacy of the ozonated water produced by this system in inactivating Cryptosporidium parasites ( C. parvum ) was evaluated at different current intensities (which change the ozone concentrations) and short exposure times (15–60 s). Oocyst viability and integrity was assessed using vital dye staining, excystation assays, and scanning electron microscopy (SEM). SEM data revealed that oocyst walls were damaged by exposure to ozone molecules even at low concentrations (
ISSN:0932-0113
1432-1955
1432-1955
DOI:10.1007/s00436-024-08390-z