A pathogen is an organism that bears ("gen") suffering ("pathos") upon another organism.
A vector, in pathology, is an organism that carries pathogens from one organism to another (examples: rats, mosquitoes, ticks).
Vectors
- Mosquitoes (malaria, yellow fever, West Nile virus)
- Ixodes scapularis (deer tick) (Lyme disease)
- Ctenocephalides felis (cat flea) (cat scratch disease, typhus, dog tapeworm)
- Acyrthosiphon pisum (pea aphid) (pathogens themselves and vectors of plant viruses)
Human pathogens
Fungi
- Coccidioides posadasii (Valley fever)
- Filobasidiella/Cryptococcus (cryptococcosis)
Worms
- Schistosoma parasites (schistosomiasis)
- Enterobius vermicularis (pinworm, seatworm, threadworm)
- Ancylostoma duodenale, Necator americanus (human hookworms)
- Ascaris lumbricoides (human roundworm)
- Taenia spp. (human and zoonotic tapeworms)
Protozoa
- Toxoplasma parasites (toxoplasmosis)
Bacteria
- Methicillin-resistant Staphylococcus aureus (MRSA staph infection)
- Legionella pneumophila (Legionnaire's disease, Pontiac fever, legionellosis)
- Treponema pallidum subsp. pallidum (syphilis)
Arthropods
- Pediculus humanus, human louse
- Sarcoptes scabiei type hominis, scabies
- Cimex lectularius, common bedbug
Viruses
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Plant pathogens
Fungi
- Gibberella moniliformis (fusarium)
- Magnaporthe grisea (rice blast, rice blight)
- Phytophthora infestans (potato blight)
- Ustilago maydis (corn smut)
Dog pathogens
Worms
- Ancylostoma caninum (dog hookworm)
- Dirofilaria immitis (heartworm)
Fish pathogens
Microorganisms
- Ichthyophthirius multifiliis (ich, ick, white-spot fish disease)
- Pfiesteria piscicida (cell from hell)
Crustaceans
- Argulus sp. (fish louse)
