Schiavone D J, Page M D, Dawborn J K
Br Med J. 1973 Nov 17;4(5889):380-2. doi: 10.1136/bmj.4.5889.380.
A microbiological assay was developed for 5-fluorocytosine based on inhibition by the drug of the fall in pH produced by Candida albicans in a synthetic liquid culture medium. Serum and urine levels of the drug could be measured reproducibly in four hours.