Vector
Pathogen
Disease
Distribution
Victim
ACARI (ticks and mites)
Rickettsia 
Liponyssoides sanguineus
Rickettsia akari
rickettsial pox
world
humans
Leptotrombidium spp.
Rickettsia tsutsugamushi
Southeast Asia
humans

various, especially Dermacentor spp.

dog tick

The American dog tick, Dermacentor variabilis. The species can transmit Rocky Mountain spotted fever, a rickettsial disease.

Rickettsia rickettsii
Rocky Mountain spotted fever
North and South America
humans
 Bacteria 
Argas spp.
Borrelia anserina
avian spirochetosis
Africa, Australia, Middle East, South America
birds
Ixodes scapularis, Ixodes pacificus
Borrelia burgdorferi
Lyme disease
United States
humans
Ornithodoros spp.
Borrelia recurrentis
relapsing fever
Africa, Asia, Europe, North America, South America
humans
various spp.
Francisella tularensis
tularemia
world
humans
Boophilus annulatus (& other species)
Babesia bigemina
Texas cattle fever
Africa, Central and South America, Europe, Southeast Asia
cattle
Rhipicephalus appendiculatus (& other species)
Theileria parva
East Coast fever
Africa
cattle
 Virus 
Dermacentor andersoni (& other species)
CTF virus
Colorado tick fever
United States, Canada
humans
Hyalomma marginatum
CCHF virus
Crimean-Congo hemorrhagic fever
Africa, Asia, Europe
humans
Ixodes persulcatus (& other species)
RSSE virus
Russian spring-summer encephalitis
Russia
humans
Ixodes ricinus
LI virus
louping ill
Europe
sheep
Ixodes ricinus (& other species)
TBE virus
tick-borne encephalitis
Europe, Russia
humans
Ornithodoros porcinus
ASF virus
African swine fever
Africa, Europe
swine
INSECTS
Anoplura (lice)
Bacteria 
Pediculus humanus
Borrelia recurrentis
epidemic relapsing fever
Africa
humans
 Rickettsia 
Pediculus humanus
Rickettsia prowazekii
Africa
humans
Pediculus humanus
Rochalimaea quintana
trench fever
Africa, Asia, Europe, Central & South America
humans
Diptera (flies)
Viruses 
Culicoides spp.
bluetongue virus
bluetongue
Africa, Asia, United States
sheep
Culicoides spp.
BEF virus
bovine ephemeral fever
Africa, Australia
cattle
Aedes spp. especially A. aegypti
DEN virus
Carribean, Southeast Asia, North America
humans
Aedes spp. especially A. aegypti
YF virus
Africa, Central & South America
humans
Aedes spp. especially A. triseriatus
LAC virus
LaCrosse encephalitis
North America
humans
Culex spp.
SLE virus
St. Louis encephalitis
North & South America
humans, horses
Culex spp.
JBE virus
Japanese encephalitis
eastern Asia
humans
Culex and Culiseta spp.
WEE virus
western equine encephalitis
Europe, North & South America
humans, horses
various spp.
EEE virus
eastern equine encephalitis
North & South America
humans, horses
various spp.
VEE virus
Venezuelan equine encephalitis
North & South America
humans, horses
various spp.
RVF virus
Rift Valley fever
Africa
humans, livestock
Phlebotomus papatasi (& other species)
sand fly fever virus
sand fly fever
Africa, Asia, Europe
humans
 Protozoa 
Anopheles spp.
Plasmodium falciporum, P. malariae, P. ovale, P. vivax
world (tropics)
humans

Glossina spp.

bug

USDA

The tsetse fly, Glossina spp., transmits protozoans which cause sleeping sickness and nagana.

Several species can transmit the flagellate protozoans. They include Glossina palpalis, G. fuscipes, G. tachinoides, G. morsitans, G. swynnertoni, and G. pallidipes.

Trypanosoma brucei gambiense
sleeping sickness
tropical Africa
humans
Phlebotomus spp. (Old World);Lutzomyia spp. (New World)
Leishmania spp.
Leishmaniasis, Kala-azar, dumdum fever
world (New World: forested and arid tropics) (Old World: savanna, steppe, subtropical)
humans, dogs
Glossina spp.
Trypanosoma brucei brucei
nagana
tropical Africa
cattle
 Nematodes 
Aedes, Anopheles, & Mansonia spp.
Brugia malayi
Southeast Asia
humans
Culex pipiens, Aedes & Anophelesspp.
Wuchereria brancrofti
world (tropics)
humans
various spp.
Dirofilaria immitis
dog heartworm
world
dogs
Simulium spp.
Onchocerca volvulus
onchocerciasis
Africa, tropical South America
humans
Chrysops spp.
Loa loa
loiasis
Africa
humans
Hemiptera (true bugs)
Protozoa 
Triatominae spp.
Trypanosoma cruzi
South America
humans
Siphonaptera (fleas)
Bacteria 

Xenopsylla spp., primarily X. cheopis

flat flea

Adult Oriental rat flea, Xenopsylla cheopis, the primary vector of bubonic plague.

Yersinia pestis
world
humans
 Rickettsia 
various spp.
Rickettsia typhi
murine (flea-borne) typhus
Central & North America, Europe
humans
 Virus 
Spilopsyllus cuniculi
myxomatosis virus
myxomatosis
Australia, Europe
rabbits