TABLE 1

Incubation periods of common travel-related infections^a

Short (< 10 days)	Medium (10–21 days)	Long (> 21 days)
Bacteria Typhoid and paratyphoid Bacterial diarrhea Bacterial pneumonia Neisseria meningitidis Brucella species Rickettsia species Spirochetes Relapsing fever (Borrelia recurrentis) Leptospirosis Viruses Hemorrhagic fevers^b Respiratory viruses Influenza, Middle East respiratory syndrome coronavirus (MERS-CoV) Measles Protozoa Malaria African trypanosomiasis Amoebic dysentery Parasite Fascioliasis	Bacteria Typhoid and paratyphoid Brucella species Rickettsia species Spirochete Leptospirosis Viruses Hemorrhagic fevers^b Human immunodeficiency virus (acute) Cytomegalovirus Hepatitis A Rabies Measles Chicken pox (varicella) Protozoa Malaria Giardia Toxoplasma African trypanosomiasis Parasite Babesia	Bacteria Rickettsia species Brucella species Bartonellosis Tuberculosis Spirochetes Leptospirosis Syphilis Viruses HIV (acute) Hepatitis B, hepatitis C Epstein-Barr virus Cytomegalovirus Rabies Measles Protozoa Malaria Leishmaniasis African trypanosomiasis Parasites Filariasis Leishmaniasis Amebic liver abscess Babesia

↵a Bold-face type indicates a serious transmissible infection; isolation precaution is mandatory when such infections are suspected.
↵b Viruses that cause hemorrhagic fevers in humans comprise 5 distinct families:
- Arenaviridae (lymphocytic choriomeningitis virus, Junin virus, Machupo virus, Lassa virus, Guanarito virus, Sabia virus, Chapare virus, Lujo virus)
- Bunyaviridae (orthobunyavirus, phlebovirus [eg, Rift Valley fever virus], nairovirus [eg, Crimean-Congo hemorrhagic fever], hantavirus)
- Flaviviridae (yellow fever, dengue fever, Japanese encephalitis, West Nile virus, Zika virus)
- Filoviridae (cuevavirus, Marburgvirus, Ebolavirus)
- Paramyxoviridae (measles, mumps, Newcastle disease virus, Hendra virus, Nipah virus).