Hospital or Healthcare-associated infections (HAI) are a major public health problem. According to the Centers for Disease Control and Prevention (CDC), there were an estimated 1.7 million healthcare-associated infections and 99,000 deaths from those infections in 2002. A recent CDC report estimated the annual medical costs of healthcare-associated infections to U.S. hospitals to be between $28 and $45 billion, adjusted to 2007 dollars. HAI are infections caused by a wide variety of common and unusual bacteria, fungi, and viruses during the course of receiving medical care.
HAI are defined as infections not present and without evidence of incubation at the time of admission to a healthcare setting. As a better reflection of the diverse healthcare settings currently available to patients, the term healthcare-associated infections replaced old ones such as nosocomial, hospital-acquired or hospital-onset infections. Most infections that become clinically evident after 48 hours of hospitalization are considered hospital-acquired. Infections that occur after the patient is discharged from the hospital can be considered healthcare-associated if the organisms were acquired during the hospital stay.
HAI is a growing concern within the healthcare industry. Did you know...
A recent study suggests that doctors may want to monitor the environmental condition of their air conditioners evaporator coil before surgery to help prevent the spread of bacterial infections. Dr. Rajiv Sahay, Laboratory Director at Environmental Diagnostics Laboratory (EDLab) and his colleagues sampled evaporator coils in healthcare air handling systems and isolated Pseudomonas aeruginosa a known HAI/noscocomial pathogen. This bacterium is listed as fourth most common cause of noscocomial infection and accounting for 10.1% of all hospital acquired infections. According to an estimate by the CDC four patients out of every 1000 discharges gets infected by P. aeruginosa.
Pseudomonas aeruginosa is an opportunistic pathogen, meaning that it exploits some break in the host defenses to initiate an infection. The bacterium almost never infects uncompromised tissues, yet there is hardly any tissue that it cannot infect if the tissue defenses are compromised in some manner. It also causes urinary tract infections, respiratory system infections, dermatitis, soft tissue infections, bacteremia, bone and joint infections, gastrointestinal infections and a variety of systemic infections, particularly in patients with severe burns, cancer and AIDS patients who are immunosuppressed. Specially, P. aeruginosa infection is a serious problem in patients hospitalized with cancer, cystic fibrosis, and burns etc. The case fatality rate in these patients is near 50 percent.
In the study, over 560,000 colony forming units (CFU)/gram of Pseudomonas sp were isolated from deep within the evaporator coil system. With an average of 10 pounds of debris removed in a typical coil that would equate to over 2.5 trillion CFU in one typical 75 ton evaporator coil system. Potential aerosolization of these micro-organisms from the infested coil is immense due to a discharge of air stream with 6 miles/hours (commonly observed) across the evaporator coils.
One way to battle HAI and remove known pathogens and mycotoxins is to sterilize the evaporator coils and air handling systems by using superheated steam to clean their heat exchangers (heating and cooling coils) utilizing the Pure-Steam process mading it possible to effectively remove dust and associated biofilm lodged deep within in the fins. This process known as “PURE-Steam Sterilization Cleaning Process” saves labor and materials, is chemical free, cleans deeper and better, kills and removes bacterial and fungal growth and sterilizes the coils in the process. The final product affords increased heat transfer efficiency and reduces the energy needed to move the air across the coils.