Accession Number : AD0717850

Title :   Bactericidal and Sporicidal Properties of Benzalkonium Chloride Improved by Ultrasound.

Descriptive Note : Final rept. May-Dec 69,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Andres,Carl J. ; Cordaro,Joseph T. ; Jerman,Albert C. ; Windeler,Alfred S. , Jr

Report Date : NOV 1970

Pagination or Media Count : 12

Abstract : This study was conducted to determine if benzalkonium chloride (Zephiran Chloride), used in conjunction with ultrasound, provides an effective, rapid, inexpensive method of sterilization of dental instruments. Fifteen minutes of ultrasonic cleaning successfully killed all vegetative organisms recovered from oral fluids and plaque, but 30 minutes of exposure was required for complete kill in the control group. Thirty minutes of ultrasonic cleaning was sufficient to kill all spores of Clostridium sporogenes, while 30 minutes in the control solution produced no sporicidal activity. Complete kill of Bacillus subtilis spores was achieved in 70% of the experimental samples; again no sporicidal activity was observed in the control samples. Ultrasonic cleaning with distilled water had no effect on the spores. (Author)

Descriptors :   (*GERMICIDES, *AMMONIUM COMPOUNDS), (*STERILIZATION, DENTISTRY), (*ULTRASONIC RADIATION, STERILIZATION), MEDICAL EQUIPMENT, BACTERIA, SPORES, CLOSTRIDIUM, BACILLUS SUBTILIS

Subject Categories : Hygiene and Sanitation

Distribution Statement : APPROVED FOR PUBLIC RELEASE