The number of qualified personnel in the prosecution department is sufficient. However, no contamination was detected in the indoor air of the disease-causing areas. Similarly, no microbial presence was found among medical staff, disinfectants, or secondary hygiene products, which are classified as sub-medical equipment. The pressure steam sterilizer was exposed to ultraviolet light for disinfection. Note: During the use of disinfectant detection, results for 3 out of 4 samples were negative.
Discussion: The quality of hospital hygiene significantly impacts public health and has always been a major concern. Despite the long-standing implementation of hospital infection control regulations and disinfection technical standards by the Ministry of Health, current survey results indicate that hospital sanitation remains unsatisfactory.
The survey findings reveal that the overall hygiene level of indoor air in hospitals is generally low. This is primarily due to inadequate internal management and outdated air disinfection methods. Most UV lamps used lack sufficient power or irradiation time, and there is limited use of continuous air disinfection systems. In terms of disinfectant usage, failures occur due to improper storage, low concentration, lack of monitoring of active ingredients, expired use, untimely replacement, and unclean containers. Additionally, the selection of disinfectants is often inappropriate. Similar issues were observed with the pressure steam sterilizers. According to quality standards, more attention should be given to the maintenance and operation of medical equipment. Based on the survey analysis, it is recommended that all levels of medical institutions strengthen infection control and disinfection management. Staff should receive regular training on infection prevention and new disinfection technologies to ensure effective sterilization and disinfection. Furthermore, legal awareness among medical personnel should be enhanced to ensure compliance with regulations and improve the overall quality of hospital hygiene.
A short report on air pollution in public places and the effectiveness of decontamination was conducted in Changyi City, Hunan Province. The study aimed to assess microbial contamination in different types of public spaces, such as hospitals, shopping malls, and hotels. In June 2003, five units of air conditioners from five districts were monitored before and after disinfection. Sterile swabs were used to collect samples from the evaporator, condensate tray, and fresh air outlet before disinfection. After the cleaning and disinfection process, the same areas were sampled again to measure bacterial counts, including Staphylococcus aureus and beta-hemolytic streptococcus. The cleaning process involved routine descaling, decontamination, and cleaning of the air conditioner's filter, evaporator, condenser, and return air system, followed by disinfection using chlorine-based agents.
The results showed that the average bacterial count in window air conditioners before disinfection was 458,572 CFU/m³, while central air conditioners had an average of 8,361.32 CFU/m³. Wall-mounted split units had an average of 2,219.5 CFU/m³, and vertical cabinet units had 213.2 CFU/m³. No Staphylococcus aureus or beta-hemolytic streptococcus was detected in any sample. After disinfection, 98 samples were tested, with an average elimination rate of 99.52% for natural bacteria. The elimination rates for window, wall-mounted, and vertical cabinet air conditioners were 99.86%, 99.56%, and 83%, respectively.
The elimination rates varied by component: 92.88% for the filter, 99.77% for the evaporator, and 96.62% for the louver window. These results highlight the presence of microbial contamination in public air conditioning systems, with most cases showing bacterial counts above 304 CFU/m³. Using appropriate air conditioning detergents and disinfectants can achieve a bacterial elimination rate of over 99.5%. Therefore, regular cleaning and disinfection of air conditioning ventilation systems are essential to maintain indoor air quality and protect public health.
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