A prospective study of corticosteroid and catecholamine levels in relation to viral respiratory illness.
Urinary 17-OHCS, epinephrine and norepinephrine levels were studied for one week before and one week after the onset of acute, severe Adenovirus 4 respiratory illness in 12 Army recruits during Basic Combat Training. During the pre-illness period, a tendency was frequently noted for all three hormone levels to show "spiking" elevations two to four days before illness onset. There was also a tendency for 17-OHCS levels to rise on the day before fever onset. The possible relationship of these pre-illness hormonal changes to stressful experiences and, in turn, to altered host resistance to infectious illness is discussed. Following onset of respiratory illness, 17-OHCS, epinephrine and norepinephrine levels all showed about 60 percent increases over the early pre-illness period baseline value. Elevations of these hormones persisted for about four to five days, roughly in correlation with fever duration, with only slight differences in configuration and timing of curves from one hormone to the next. The problem of evaluating which of several independent variables operating concurrently during infectious illness may be responsible for stimulating the final common neuroendocrine pathways is discussed.