Travel medicine.

This review covers significant recent developments in the field of travel medicine. New vaccines related to travel are discussed: cholera, Lyme disease, and rotavirus. Pertinent travel vaccine-related issues with varicella, polio, meningitis, Japanese encephalitis, and tick-borne encephalitis are described. New developments in malaria prophylaxis, diagnosis and treatment are discussed. Imported cases of African tick bite fever, arboviruses, African trypanosomiasis, and Helicobacter pylori, and diarrheal illness are reviewed.