title: Ineffectiveness of a quaternary ammonium salt and povidone-iodine for the inactivation of Ascaris suum eggs.
abstract: Two commonly used disinfectants, a quaternary ammonium salt and povidone-iodine, were tested for effectiveness against unembryonated Ascaris suum eggs. The quaternary ammonium salt (alkyl dimethyl benzyl ammonium chloride) had no effect on the Ascaris eggs (10 minutes and 22°C) when compared with the controls in water with egg viabilities of 88.8% ± 3.3% and 86.9% ± 6.2%, respectively. An additional quaternary ammonium salt, 2.5% benzethonium chloride, also had no effect. Phenol (5%) and cresol (3%) completely inactivated the eggs. Povidone-iodine at 100%, 50%, 10%, and 1% had no effect on the eggs at exposures of 5, 15, 30, 60, or 120 minutes (22°C) compared with the water controls.
authors.affiliation: Department of Chemistry and Life Science, United States Military Academy, West Point, NY 10996, USA. michael.labare@usma.edu
authors.forename: Michael P
authors.initials: MP
authors.lastname: Labare
authors.forename: Hilary
authors.initials: H
authors.lastname: Soohoo
authors.forename: Dong
authors.initials: D
authors.lastname: Kim
authors.forename: Key yan
authors.initials: Ky
authors.lastname: Tsoi
authors.forename: Janice L
authors.initials: JL
authors.lastname: Liotta
authors.forename: Dwight D
authors.initials: DD
authors.lastname: Bowman
mesh_terms: D000818:Animals; D017165:Ascaris suum / Q000187:drug effects*; D004202:Disinfectants / Q000494:pharmacology*; D011206:Povidone-Iodine / Q000494:pharmacology*; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D013696:Temperature; D013997:Time Factors; D015053:Zygote / Q000187:drug effects
chemical_list: D004202:Disinfectants; D000644:Quaternary Ammonium Compounds; D011206:Povidone-Iodine