( CNN ) -- More romaine lettuce has been recalled amid an investigation into an outbreak of food-borne illness that has sickened at least 19 people in three states . Vaughan Foods of Moore , Oklahoma , is recalling romaine lettuce with `` use by '' dates of May 9 and May 10 , the Food and Drug Administration said in a statement . The company sold the lettuce to restaurants and food-service facilities , the administration said . Vaughan said in a statement Tuesday that it had informed customers who purchased the suspect lettuce . `` Food safety continues to be Vaughan Foods ' number one priority , '' said Mark Vaughan , president and CEO of the company . `` Vaughan management is not aware of any links to any food-borne illness associated with any product produced by Vaughan Foods . '' Vaughan 's recall comes after Freshway Foods recalled romaine lettuce last week because of a possible connection to an outbreak of food-borne disease linked to E. coli O145 in Michigan , Ohio and New York . Blog : What you should know about E. coli . A sickened Ohio State University student sued Freshway on Tuesday . Freshman Richard Cardinale filed a lawsuit after his stool sample tested positive for E. coli O145 , according to court documents . He suffered from gastrointestinal problems including bloody diarrhea and dehydration and was hospitalized on April 14 for treatment . `` We have a new form of deadly E.coli to contend with , '' said food safety lawyer Bill Marler , who is representing Cardinale . `` It is past time for the government and industry to track this bug as it does E.coli O 157 : H7 , '' he said , referring to the best known form of toxic E.coli . Authorities are investigating a farm near Yuma , Arizona , where the tainted lettuce was harvested , the Food and Drug Administration said . Vaughan Foods received lettuce from that farm , the administration said . FDA : Link between bagged romaine lettuce and E. coli O145 illness outbreak . Investigators have confirmed that the outbreak has sickened 19 people : 10 in Michigan , seven in Ohio and two in New York . Twelve of the 19 have been hospitalized , including three who developed a potentially life-threatening complication called hemolytic uremic syndrome , or HUS , the administration said . In addition , health investigators cite the outbreak as the `` probable '' reason that 10 other people have fallen ill : five in New York , three in Michigan and two in Ohio , according to the Centers for Disease Control and Prevention . Though most healthy adults recover from E. coli O145 within a week , young children and the elderly are most at risk of developing HUS . Federal health authorities are encouraging anyone with such symptoms to contact a health care provider immediately . Ohio-based Freshway Foods said that the recalled shredded romaine lettuce was sold to wholesalers , food service outlets , and some in-store salad bars and delis . Health.com : 8 ways to prevent food poisoning . The company said it sold the lettuce in question to businesses in Alabama , Connecticut , the District of Columbia , Florida , Georgia , Illinois , Indiana , Kansas , Kentucky , Maryland , Massachusetts , Michigan , Missouri , New Jersey , New York , North Carolina , Ohio , Pennsylvania , Rhode Island , South Carolina , Tennessee , Virginia , West Virginia and Wisconsin . Consumers are urged not to eat `` grab and go '' salads sold from in-store salad bars and delis at Kroger , Giant Eagle , and Marsh stores . The recall does not affect romaine lettuce and other types of lettuce and leafy greens from other producers . CNN 's Val Willingham contributed to this report .
NEW : Romaine lettuce recall The U.S. Department of Agriculture has recalled about 100 tons of romaine lettuce, the agency said Thursday. NEW : Company says it has informed customers who purchased the lettuce . NEW : Sickened student sues Freshway Foods , which was involved in earlier recall .