Prolonged Incubation Periods
Some diseases have prolonged and variable incubation periods.
Linking international travel with the much later appearance of a disease can be difficult. Some diseases have prolonged and variable incubation periods. Clinical manifestations of these diseases may appear long after the return from travel, so that the link with the travel destination where the infection was acquired may not be readily apparent. This can cause difficulty in diagnosis. These include such diseases as brucellosis, HIV/AIDS, leishmaniasis and tuberculosis.
