International travel carries a risk of colonization by antimicrobial-resistant intestinal flora. The use of a quinolone, but not a macrolide, during travel further increases the risk of acquisition of extended-spectrum beta-lactamase-producing Enterobacteriaceae.
A high rate of COVID-19 occurred as the result of an outbreak in spring breakers. Rapid recognition and intervention, as well as the youth and good health of those infected, was effective in limiting the adverse consequences.
Infectious illness is common in travelers from other countries visiting the United States. Skin and soft tissue infections, respiratory infections, and gastrointestinal illness are most likely, but specific geographic illnesses such as Lyme disease also occur.
It is expensive to respond to and control measles outbreaks in the United States. Primary outbreak prevention should focus on vaccination of travelers and encouragement of routine vaccine acceptance by those who currently are hesitant to have their children vaccinated.
Mefloquine is known as an effective agent for malaria chemoprophylaxis. However, concerns about serious adverse effects have limited its use. Now, a careful review of data suggests that fatal outcomes related to mefloquine prophylaxis are very rare.
Some adventure travel is associated with exposure to infectious pathogens. Some adventure-related illnesses can be prevented. Understanding the details of an adventure trip can help focus a differential diagnosis for ill returned travelers.