However, initial evaluation
of longitudinal data in the cohort of asthmatic residents who were
exposed almost annually to K. brevis blooms did not identify any
particular subgroup of asthmatics at increased risk, nor does there
appear to be any longitudinal health effect over years of
intermittent exposure. Despite potential intermittent brevetoxin
environmental exposures, continued intermittent exposure to
aerosolized Florida red tide toxins over several years follow up did
not appear to cause major respiratory changes in the asthmatic
study group,; however, these results need to be explored further to
be confirmed (Bean, personal communication).