The regulated company, which had been very convenient for trading with countries where conditions were stable, was not so suitable for ventures to remoter lands, where the risks, commercial and political, were greater.
Second, the Cu5Zr8 phase, previously reported as stable, was not observed in a Cu 56.4 at.% Zr alloy after holding at 955 and 1036 K for >100 h.
Presence of mice and rats in the stable was not found to be a risk factor in our study, although a recent study showed presence of C. burnetii in rats at livestock farms in the Netherlands [ 45].
Although the behavior of the goats in the stable was not scored systematically on days 1 to 3 of the experiment, it was obvious that the goats were alert when the visual and/or acoustic stimuli were presented.
However, presence of wild birds in the stable was not a risk factor in the multivariable analysis but mainly indicated the farmer actively controlled nuisance animals such as by covering airspaces.
A viral basis for TVH has been presumed since its initial description in 1959 because the causative agent passed through 100-nm membranes, was acid stable, was not affected by antimicrobial drugs, and could be propagated in the yolk sac of embryonated chicken eggs (3 – 5 ).
