为什么马桶里总是有一圈红色？还真不是水锈

Core Insights - The article discusses the presence of Serratia marcescens, a bacterium that causes reddish stains in household areas like toilets and sinks, and its implications for health and hygiene [5][10]. Group 1: Characteristics of Serratia marcescens - Serratia marcescens is a small bacterium known for producing a red pigment called prodigiosin, leading to its characteristic reddish or pink colonies [5]. - It is commonly found in moist environments such as bathrooms, kitchens, and natural settings, and can inhabit the human respiratory, urinary, and digestive tracts [5]. - While it poses minimal risk to healthy individuals, it can cause infections in immunocompromised individuals, including urinary tract infections and respiratory infections [5]. Group 2: Conditions Favoring Growth - The installation of pre-filters that remove chlorine from tap water can create an environment conducive to the growth of Serratia marcescens [9]. - High-rise residential buildings with water storage systems may also experience outbreaks if the water tanks are not properly maintained [9]. - Stagnant water in household storage devices, such as toilet tanks and humidifiers, can lead to the proliferation of this bacterium [10]. Group 3: Prevention and Cleaning - Regular cleaning of water storage devices and maintaining proper hygiene in kitchens and bathrooms can help mitigate the growth of Serratia marcescens [16][18]. - Using disinfectants like alcohol or chlorine-based solutions is effective against this bacterium, and alternative cleaning methods can be employed in sensitive areas [16]. - Keeping environments dry and addressing leaks in plumbing can significantly reduce the risk of bacterial growth [18][19].