Table 3

In vitro recovery of known amounts of eicosanoids and cytokines from filter papers incubated in buffer alone, buffer containing colonic bacteria, and buffer containing sterile culture broth. Median (IQR) percentage recovery is shown for in vitro recovery from buffer alone; for recovery from buffer containing bacteria or sterile culture broth, mean percentage recovery is shown

Mediator	Recovery from buffer (%)	n	Recovery in the presence of colonic bacteria (%)	n	Recovery in the presence of culture broth (%)	n
IL-1β	84 (76–91)	8	82	2	78	2
IFN-γ	15 (12–18)	6	Not assessed	2	Not assessed	2
TNF-α	88 (75–106)	6	92	2	125	2
TXB₂	99 (95–107)	6	99	2	87	2
PGE₂	96 (92–99)	4	110	2	101	2