Swimming pool bacteria
Swimming pool bacteria are the diverse array of bacteria that are present in aquatic environments, primarily swimming pools, which can have effects on human health and water quality. Recreational waters are known to be source of infectious diseases.[1]
Types
[edit]There are different types of bacteria that are found in swimming pools and other types of recreational waters. The most prevalent of them is Staphylococcus aureus (S. aureus). This bacterium is one of the leading causes of skin infections in the world. Such infections could appear as painful boils and rashes.[2] It is naturally present in humans on skin, in nasal mucous, and inside the intestinal tract.[3] S. aureus has a strong resistance to chlorine, which is one of the methods by which pools are often cleaned.[4]
Other bacteria often found in recreational waters are Enterococci,[5] which is a genus of bacteria found in feces. Fecal contamination is one of the primary public health concerns in swimming pools.[4] Fecal contamination usually occurs through excretion by bathers, other animals, or contaminated water sources.[4]
Levels found in recreational waters
[edit]Researchers have studied the quantity of bacteria in recreational waters. In a study of swimming pools in Alexandria, Egypt,[4] the team studied 10 pools, both indoor and outdoor, over two months during the summer.[4] The team found that bacteria seemed to be more prevalent in outdoor pools.[4] Furthermore, they noted that the higher the pH of the pool, the more bacteria were present in the water. 20.2% of the bacteria in the pools were found to be S. aureus.[4]
Another study reported two experiments involving a large pool and a small pool.[5] Using 10 volunteers, the team examined how many bacteria could be found in the watershed by the bathers and how many could be found in the water after the bathers were exposed to sand.[5] The study concluded that bathers shed both S. aureus and enterococci into the water, and S. aureus was shed the most.[5] After each cycle, the number of bacteria the bathers shed decreased.[5]
Enterotoxic Escherichia coli has been found in pools with sub-optimal chlorine levels.[1]
Disease prevention
[edit]There are several diseases caused by S. aureus and enterococci. S. aureus has been found to cause sepsis and pneumonia, among other problems,[6] while Enterococci has been found to cause sepsis and urinary tract infections,[7] as well as being resistant to antibiotics.[8] There are various actions taken to prevent swimmers from falling ill. The swimming facilities must ensure that their filtration is working and that their staff are trained and know the appropriate behavior and procedures of the facilities.[9] Individual swimmers must also take preventative measures. As stated by the Centers for Disease Control and Prevention (CDC), guests must not swim if they have diarrhea, swimmers should not swallow pool water, swimmers should wash themselves before entering the pool, and if the restroom is used, each guest must thoroughly wash themselves.[9]
In Europe, the cleanliness of pools is monitored by measuring the levels Escherichia coli, enterococci and Pseudomonas aeruginosa. Staphylococcus aureus levels are not monitored despite the detection of the bacteria in recreational waters (and on beaches).[10] The authors of a 2023 study recommended levels of bacteria of 0 CFU/100 mL for water of excellent quality, less than 20 CFU/100 mL for water of very good quality, less than 50 CFU/100 mL for good quality water, and more than 50 CFU/100 mL for poor quality water. [10]
References
[edit]- ^ a b Verma A, Bolton FJ, Fiefield D, Lamb P, Woloschin E, Smith N, et al. (August 2007). "An outbreak of E. coli O157 associated with a swimming pool: an unusual vehicle of transmission". Epidemiology and Infection. 135 (6): 989–92. doi:10.1017/S0950268807007947. PMC 2870659. PMID 17288639.
- ^ "Infection caused by staphylococcus bacteria-Staph infections - Symptoms & causes". Mayo Clinic. Retrieved 2024-04-27.
- ^ Acton DS, Plat-Sinnige MJ, van Wamel W, de Groot N, van Belkum A (February 2009). "Intestinal carriage of Staphylococcus aureus: how does its frequency compare with that of nasal carriage and what is its clinical impact?". Eur J Clin Microbiol Infect Dis. 28 (2): 115–27. doi:10.1007/s10096-008-0602-7. hdl:1765/26955. PMID 18688664.
- ^ a b c d e f g Masoud G, Abbass A, Abaza A, Hazzah W (July 2016). "Bacteriological quality of some swimming pools in Alexandria with special reference to Staphylococcus aureus". Environmental Monitoring and Assessment. 188 (7): 412. Bibcode:2016EMnAs.188..412M. doi:10.1007/s10661-016-5427-8. PMID 27312255.
- ^ a b c d e Elmir SM, Wright ME, Abdelzaher A, Solo-Gabriele HM, Fleming LE, Miller G, et al. (January 2007). "Quantitative evaluation of bacteria released by bathers in a marine water". Water Research. 41 (1): 3–10. Bibcode:2007WatRe..41....3E. doi:10.1016/j.watres.2006.10.005. PMC 2633726. PMID 17113123.
- ^ "Staphylococcus aureus in Healthcare Settings | HAI | CDC". www.cdc.gov. 2020-12-10. Retrieved 2024-05-13.
- ^ "Enterococcal Infections - Infectious Diseases". Merck Manual Professional Edition. Retrieved 2024-05-13.
- ^ Kristich CJ, Rice LB, Arias CA (2014), Gilmore MS, Clewell DB, Ike Y, Shankar N (eds.), "Enterococcal Infection—Treatment and Antibiotic Resistance", Enterococci: From Commensals to Leading Causes of Drug Resistant Infection, Boston: Massachusetts Eye and Ear Infirmary, PMID 24649502, retrieved 2024-05-13
- ^ a b "Preventing Recreational Water Illnesses at Your Facility | Healthy Swimming | Healthy Water". www.cdc.gov. 2023-04-14. Retrieved 2024-04-27.
- ^ a b Mahy JG, Luizi F (June 2023). "Review on the management of water quality for bio-mineral swimming pools in Western Europe". Environ Monit Assess. 195 (7): 872. doi:10.1007/s10661-023-11502-4. PMID 37351694.