frequent in the older group, which has been observed
by others.
26–28
As shown in a previous GeoSentinel
study, older age appeared to correlate with a higher
proportionate morbidity from rickettsial infections,
mainly due to spotted fever-group rickettsia.29
It has
been suggested that an increased likelihood of spotted
fever-group rickettsiae may be related to the increased
disposable income and leisure time required for African
safari itineraries.
30
Although African tick-bite fever is
usually benign and self-limited, it may lead to more
severe complications in older travelers.
31
Prevention
of arthropod bites using repellents and mosquito nets
and malaria chemoprophylaxis should be reinforced
regardless of age