Influence of ceftriaxone treatment on FDG uptake--an in vivo [18F]-fluorodeoxyglucose imaging study in soft tissue infections in rats.
Our aim was to determine the influence of antibiotic treatment using ceftriaxone on [18F]-fluorodeoxyglucose (FDG) uptake in experimental soft tissue infections. PET scans were performed in two groups (treated n=4; non-treated n=4) at days 3, 5, and 6 after inoculation of the infection. Additional autoradiography was performed in four animals at day 7 and in three animals at day 11. The difference of FDG uptake on day 5 (after three days of antibiotic treatment) between both groups proved to be significant (df=6; T=2.52; p=0.045). FDG uptake determined at the other days did not reveal significant difference between the two groups. It seems to be possible that the effect of antibiotic treatment on FDG uptake is less evident than reported for therapy monitoring of cancer treatment. The change of FDG uptake over time in treated and untreated infections is complex and further in vivo experiments have to be initiated to investigate the potential value of clinical FDG PET in therapy monitoring of infection.
PET Center, Division of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland. matthias.wyss@usz.ch
Matthias T
MT
Wyss
Michael
M
Honer
Nicolas
N
Späth
Jochen
J
Gottschalk
Simon M
SM
Ametamey
Bruno
B
Weber
Gustav K
GK
von Schulthess
Alfred
A
Buck
Achim H
AH
Kaim
D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage; D002443:Ceftriaxone / Q000008:administration & dosage*; D019788:Fluorodeoxyglucose F18 / Q000493:pharmacokinetics*; D008297:Male; D008657:Metabolic Clearance Rate; D009220:Myositis / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000378:metabolism* / Q000473:pathology; D049268:Positron-Emission Tomography / Q000379:methods*; D011379:Prognosis; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018461:Soft Tissue Infections / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D013203:Staphylococcal Infections / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D016896:Treatment Outcome
D000900:Anti-Bacterial Agents; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18; D002443:Ceftriaxone