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In response to:The distinction between a quinolone drug and a fluoroquinolone drug is the addition of the fluorine atom to the pharmcore, resulting in a fluorinated drug. The terms fluoroquinolone and quinolone are often used interchangeably, without regard to this distinction.[citation needed] 

Reduced Fluoroquinolone Susceptibility in Salmonella enterica Serotypes in Travelers Returning from Southeast Asia
Antti Hakanen,*† Pirkko Kotilainen,† Pentti Huovinen,* Hans Helenius,‡ and Anja Siitonen§
National Public Health Institute, Turku, Finland; †Turku University Central Hospital, Turku, Finland; ‡Turku University, Turku, Finland; and §National Public Health Institute, Helsinki, Finland

http://www.cdc.gov/ncidod/EID/vol7no6/hakanen.htm
“Thus, the terms reduced fluoroquinolone susceptibility and quinolone resistance are used interchangeably hereafter.”

http://books.google.com/books?id=bd0R7RCuvdwC&pg;=PA1043&lpg;=PA1043&dq;=%22fluoroquinolones+and+quinolone+are+often+used+interchangeably%22&source;=bl&ots;=6jwDDXNML4&sig;=FtRL0hk42b6_Hq-PibsQMbLCxrg&hl;=en&ei;=1VaiSefDM9G3twegu8iTDQ&sa;=X&oi;=book_result&resnum;=6&ct;=result

Reese and Betts' a Practical Approach to Infectious Diseases: Edited by Robert F. Betts, Stanley W. Chapman, Robert L. Penn 
By Robert F. Betts, Stanley W. Chapman, Robert L. Penn, Richard E. Reese 
Edition: 5, illustrated 
Published by Lippincott Williams & Wilkins, 2003 
ISBN 0781732816, 9780781732819 
1202 pages
“In this chapter the terms "fluoroquinolones" and "quinolones" are used interchangeably. I. An overview of the fluoroquinolones”