Rollins, the corporation that owns seven pest control companies, including Orkin, says it has seen a 33.6 percent increase in bed bug business compared to 2010.  The company has just released its rankings of U.S. cities in order of the number of bed bug treatments from January to December 2011.

And the winner … is Cincinnati.  Chicago is ranked second, followed by Detroit, Denver and Los Angeles.  The report says L.A. moved from 25th to fifth on the list.

Here are the top 50 U.S. cities, ranked in order of the number of bed bug treatments.  The number in parenthesis is the shift in ranking compared to January to December 2010:

1. Cincinnati 2. Chicago 3. Detroit (+1) 4. Denver (+2) 5. Los Angeles (+20) 6. Columbus, Ohio (-3) 7. Dallas/Fort Worth, Texas (+43) 8. Washington, D.C. (-3) 9. New York (-2) 10. Richmond/Petersburg, Va. (+6) 11. Houston (-1) 12. San Francisco/Oakland/San Jose, Calif. (+35) 13. Cleveland/Akron/Canton, Ohio (+1) 14. Boston (+4) 15. Dayton, Ohio (-7) 16. Las Vegas (-1) 17. Honolulu (+55) 18. Baltimore (-6) 19. Raleigh/Durham/Fayetteville, N.C. (+9) 20. Philadelphia (-9) 21. Atlanta (+24) 22. Lexington, Ky. (-13) 23. Syracuse, N.Y. (+25) 24. Miami/Fort Lauderdale, Fla. (+27) 25. Colorado Springs/Pueblo, Colo. (+19) 26. San Diego (+13) 27. Seattle/Tacoma, Wash. (-3) 28. Omaha, Neb. (-11) 29. Buffalo, N.Y. (-16) 30. Pittsburgh (-3) 31. Indianapolis (-12) 32. Milwaukee (+6) 33. Charlotte, N.C. (+13) 34. Phoenix (+19) 35. Louisville, Ky. (-3) 36. Hartford/New Haven, Conn. (-16) 37. Grand Junction/Montrose, Colo. (+30) 38. Knoxville, Tenn. (+4) 39. Grand Rapids/Kalamazoo/Battle Creek, Mich. (-17) 40. Nashville, Tenn. (+15) 41. Sacramento/Stockton/Modesto, Calif. (+24) 42. Des Moines/Ames, Iowa (-13) 43. Salisbury, Md. (+46) 44. Albany/Schenectady/Troy, N.Y. (-23) 45. Cedar Rapids/Waterloo, Iowa (-22) 46. Minneapolis/St. Paul, Minn. (-20) 47. Lincoln/Hastings/Kearney, Neb. (-17) 48. Salt Lake City (-8) 49. Charleston/Huntington, W.Va. (-13) 50. West Palm Beach/Ft. Pierce, Fla. (+6)