I have a hot tub and we keep it clean...but not every public one is the cleanest.
How do staph skin infections spread?
The cleanest person can get a staph infection. Staph can rub off the skin of an infected person and onto the skin of another person when they have prolonged skin-to-skin contact. Staph from an infected person can also get onto a commonly shared item or surface, and then get onto the skin of the person who touches it next. Examples of commonly shared items are towels, benches in saunas or hot tubs, and athletic equipment - in other words, anything that could have touched the skin of a staph infected person can carry the bacteria to the skin of another person.
link
http://www.health.state.mn.us/divs/idepc/diseases/mrsa/mrsacommunity.html
Hope this helps you understand it better ~~Pandora~~