| Viruses |
| Colorado tick fever | Colorado tick fever virus | North America |
| Yellow fever | Yellow fever virus | South America, Africa |
| Dengue fever | Dengue virus | South or southeast Asia, South or Central America, Caribbean, Africa |
| African hemorrhagic fevers | Lassa virus, Marburg virus, Ebola virus, etc. | Africa |
| Lymphocytic choriomeningitis | Lymphocytic choriomeningitis mammarenavirus | Widespread |
| Viral hepatitis | Hepatitis A – E viruses | Widespread |
| Bacteria |
| Brucellosis | Brucella species | Widespread |
| Leptospirosis | Leptospira species | Widespread, especially in tropical or subtropical areas |
| Rat-bite fever | Streptobacillus moniliformis, Spirillum minus | Predominantly North America, Asia |
| Bartonellosis | Bartonella species | Widespread |
| Typhoid fever | Salmonella enterica serovar Typhi or Paratyphi | Predominantly south or southeast Asia, southern Africa |
| Ehrlichiosis | Ehrlichia species | North America |
| Rickettsiosis | Rickettsia species | Widespread |
| Tularemia | Francisella tularensis | North America, Europe, Asia |
| Meningococcemia | Neisseria meningitidis | Widespread, but predominantly in sub-Saharan Africa (“meningitis belt”) |
| Protozoa |
| Malaria | Plasmodium species | Africa, Asia, South America |
| Babesiosis | Babesia species | North America, Europe, Asia |
| Visceral leishmaniasis (kala-azar) | Leishmania species | Africa, Asia, south or central America, Europe (Mediterranean) |