For all subsequent statistical analyses, IL-8, TNFα and IL-10 concentrations present in un-stimulated cultures were subtracted to give stimulus-specific cytokine levels for each

individual. The ratio of IL-10: TNFα was calculated from stimulus-specific cytokine levels. As cytokine concentrations, IL-10: TNFα ratios, smp0–3 h RP: m0–3 h RP cytokine ratios, and leucocyte percentages did not meet parametric assumptions, the Mann–Whitney U-test and Kruskal–Wallis tests were used to compare between two independent groups and K independent groups, respectively. The Wilcoxon signed-rank BVD-523 molecular weight test was used for paired comparison of periodate-treated and mock-treated WB culture cytokine production. This study comprised a total of 47 individuals from the Diokhor Tack community aged 6–53 years old, of whom 13 were not infected, 14 infected with S. mansoni only and 20 co-infected with S. mansoni and S. haematobium (Table 1). Only two participants

in the co-infected group were also positive for soil-transmitted nematode eggs. S. mansoni infection intensity did not significantly differ according to gender (F1,30: 1·433, P = 0·241), age group (F1,30: 1·397, P = 0·246) or between infected and co-infected groups (F1,30: 2·380, P = 0·133). S. haematobium infection intensity also did not significantly differ between males and females (F1, 17: 0·240, P = 0·631) check details or between age groups (F3,17: 2·501, P = 0·132) in the co-infected group. To investigate innate/early immune responses to 0–3 h RP, IL-8, TNFα and IL-10 were quantified in (-)-p-Bromotetramisole Oxalate whole-blood supernatants 24 h post-stimulation. Levels of all three cytokines were significantly higher in 0–3 h RP-stimulated cultures than in un-stimulated cultures (IL-8 Z: −5·968, P < 0·001; TNFα Z: −5·905, P < 0·001; IL-10 Z: −5·968, P < 0·001) with

all 47 participants mounting a detectable cytokine response to 0–3 h RP. Participants also produced higher levels of IL-8, TNFα and IL-10 in response to zymosan than in un-stimulated control cultures (IL-8 Z: −5·968, P < 0·001; TNFα Z: −5·841, P < 0·001; IL-10 Z: −5·905, P < 0·001). Interestingly, stimulus-specific IL-8 and IL-10 levels were higher in response to 0–3 h RP than to an equivalent concentration of zymosan in paired cultures (Wilcoxon signed-rank test, IL-8 Z: −5·661, P < 0·001 and IL-10 Z: −4·370, P < 0·001), whilst TNFα levels were higher in response to zymosan than to 0–3 h RP (Wilcoxon signed-rank test, Z: −4·529, P < 0·001). There was no significant correlation between levels of any of the 0–3 h RP-specific cytokines, and schistosome infection intensity and levels did not differ between age groups (data not shown).