Efficacy of various surface disinfectants on an irregular surface

Area of Science:

• Microbiology
• Infectious Diseases
• Environmental Health

Background:

• Pseudomonas aeruginosa is an opportunistic pathogen frequently found in healthcare settings.
• Effective hard surface disinfection is crucial for preventing healthcare-associated infections.
• Evaluating disinfectant efficacy against specific pathogens is essential for infection control.

Purpose of the Study:

• To compare the effectiveness of various hard surface disinfectants against Pseudomonas aeruginosa.
• To identify disinfectants with reliable antimicrobial activity for clinical environments.

Main Methods:

• Representative hard surface disinfectants were tested against Pseudomonas aeruginosa (ATCC 27853) using a standardized protocol on frosted glass rods.
• Two independent investigators conducted the tests, processing 100 rods per disinfectant.
• Bacterial growth inhibition was assessed on treated rods.

Main Results:

• Sporicidin surface disinfectant and a 1:10 dilution of household bleach were the most effective against P. aeruginosa.
• Lysol disinfectant spray exhibited similar performance to the most effective agents.
• Biocide failed to inhibit growth on more than 50% of treated rods.
• Iodophor efficacy may have been compromised by the use of cotton-filled gauze, due to potential iodine-cellulose interactions.

Conclusions:

• Sporicidin and diluted household bleach are highly effective hard surface disinfectants against Pseudomonas aeruginosa.
• Disinfectant performance can vary significantly, necessitating careful product selection.
• Material interactions, such as with gauze, can impact disinfectant efficacy.