Investigating the Behavior of UVC Rays on the Inactivation of Staphylococcus Aureus from Simulated Contaminated Air Using a Probit Model
Journal Title: Advances in Clinical Toxicology - Year 2024, Vol 9, Issue 2
Abstract
Today, one of the most significant health challenges is controlling airborne microbial agents. Utilizing ultraviolet (UV) rays is a method to eliminate these microbial agents and can be an effective approach for disinfecting hospitals. The main mechanism in which UV radiation works is not by directly eliminating bioaerosols, rather by preventing their proliferation through damaging the outer structure of their cells. As a result, bioaerosols cease to proliferate and eventually die due to cell death. In this study, our objective is to determine the optimal duration of UV irradiation and temperature and pH required to achieve efficient removal of S. aureus bacteria. A suspension of bacteria was prepared using the 0.5 McFarland standard. The desired contaminated air was produced and blown into the reactor using an air pump. Sampling was done using a membrane biosterile filter with a pore diameter of 0.22 micrometers in various UV irradiation time, temperature, and pH. The number of colonies grown from the samples was counted. The removal efficiency of S. aureus bacteria was >70% after 10 minutes of irradiation, >80% after 20 minutes, and >95% after 30 minutes at a constant rate. Also, the actual bacterial removal efficiency differs slightly from the removal efficiency predicted by the probit model.
Authors and Affiliations
Leili M , Afrasiabi S , Khazaei M and Rostami R
Keywords
Related Articles
- EP ID EP754555
- DOI 10.23880/act-16000303
- Views 19
- Downloads 0
Acute Kidney Injury in Children Following Multiple Wasp Stings and its Immediate Outcome
Background: Wasp bites usually bring temporary discomfort and pain, but on occasion, massive wasp stings can cause fatal allergic reactions and multiple organ failure including acute kidney injury (AKI), hepatic failure...
A Quantitative Risk Assessment for Stachybotrys chartarumToxic Mold
The inhalation exposure to Stachybotrys chartarum (SC) has been playing a critical role in public health domain due to its ability to produce toxins (trichothecene and other mycotoxins), that are implicated in the cases...
Studying the Prevalence of Lead among Schoolchildren in Qatar and its Impacts on School Performance and Attitudes towards Violence in School
Exposure to lead (pb+2) has been associated with several diseases including mental diseases and violent behaviors. The main objectives of this study were to determine the prevalence of lead (pb+2) and its impacts on scho...
Obesity, Diets and Pollution
In the past decades, the problem of obesity has grown exponentially, particularly in the industrialised countries, so that in the next few years the statistical predictions of the World Health Organisation (WHO) estim...
Potential of the Combination of a Systemic Enzyme Complex and Probiotics administration to Combat COVID-19: A Randomized Open Label Prospective Analysis
Background: Enzymes have been used for therapeutic applications for decades owing to their anti-inflammatory and immunomodulatory effects. Probiotics are well known to reduce the incidence and severity of several health-...