Which of the following is a pathogen of concern in pools?

Pseudomonas is notably a pathogen of concern in pools due to its ability to thrive in warm, moist environments, such as those found in swimming facilities. This bacterium can often lead to skin infections, respiratory issues, and eye infections, particularly in individuals with compromised immune systems or open wounds. Its resilience makes it difficult to control, especially in improperly maintained pools or hot tubs where chlorine levels might be insufficient to eliminate its presence.

While the other pathogens listed can also cause illness, they typically do not have the same association with recreational water environments as Pseudomonas. For instance, Rhinovirus is primarily responsible for respiratory infections and is transmitted mainly through respiratory droplets, rather than water. Staphylococcus, while it can also cause skin infections, does not have the same level of concern in pool settings as Pseudomonas. Lastly, Escherichia coli is often associated with fecal contamination and waterborne outbreaks in recreational settings, but its primary risks are linked to poorly managed water sources rather than pool environments when proper health and sanitation measures are followed. Thus, the specific characteristics and behavior of Pseudomonas make it a significant concern for public health in swimming pools.