An Arizona mother of four has been banned from eight McDonald's restaurants where she repeatedly swabbed play areas for bacteria in a personal crusade for better cleanliness, various news organizations report.

Monday, Erin Carr-Jordan, 36, of Chandler, Ariz., received a hand-delivered letter informing her that she is prohibited from setting foot in eight McDonald's restaurants in Gilbert, Chandler and Phoenix and that she will be charged with criminal trespass if she does, The Arizona Republic reports.

"It doesn't mean much to me personally," Carr-Jordan told ABC News. "I've gotten positive responses from parents who said, 'Hey, I'm not banned. Give me swabs.' "

Carr-Jordan tells the Republic that she believes the incident that set off the ire from McDonald's was one that took place at a Gilbert, Ariz., restaurant, where she found MRSA in the restaurant's PlayPlace and informed the manager as well as customers with children. When she saw one child licking the equipment, she demanded the restaurant close down the play area.

"I can't imagine knowing there was MRSA and not doing anything," Carr-Jordan tells the Republic. "I make no apologies for what I did."

All of the locations where Carr-Jordan is banned are owned by Ernie Adair, Carr-Jordan says, and he could not be reached by ABC News. The Republic says the letter was drafted by Phoenix lawyer James Stipe, who declined to name his client.

Dayna Proud, a McDonald's spokeswoman in Illinois, told the Republic the corporation remains "committed" to communicating with Carr-Jordan to address her concerns but recent actions by Carr-Jordan "have become disruptive to the employees and customers within our franchise's restaurants." Proud said, "We remain committed to working with an internal team on ensuring that our PlayPlaces are clean and safe for all customers."

Carr-Jordan's campaign, which covers six states, began in earnest after she had grime samples tested that she'd collected from a play area at a McDonald's in Tempe, Ariz., and discovered they contained pathogens found in fecal material and mucus, the Republic reports.