Approximately 40% of the variation in IFN-γ responses to PPD following BCG were attributable to host genetic factors.
Only 2% outpatient visits, on average, were attributable to host community members.
In the Asian settlements, only 2% outpatient visits, on average, were attributable to host community members.
Whether the increased prevalence and severity of ocular toxoplasmosis in Brazil are attributable to host or parasite genetic factors or differences in exposure rate is uncertain.
The difference in mortality found in rural counties may be attributable to a host of causes.
These differences may be attributable to either host or pathogen related factors as well as access to patient sampling in the clinical settings.
Although data are not available, this damage also might be attributable to secondary host immune responses (eg, through cytokine dysregulation triggered by high viral replication).
The lack of reported TSEs in BHS may be attributable to other host factors or a lack of TSE surveillance in this species.
Stochastic viral evolution implies that not all of the inter-patient variations may be attributable to variations in host-genetic factors.
In some cases, differences in clinical outcome are likely to be attributable to differences in host-background.
