Parasite Name Generator

Real and fictional parasite species names

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Generate parasite names for horror, sci-fi, and tabletop games, alongside real parasite species from medical parasitology: Latin binomials, invented genus names built from Greek and Latin roots, and horror-ready common names for infections and hosts.

About parasite names

Real parasite names follow the same Linnaean rules as every other organism: a capitalised genus and a lowercase species epithet, usually built from Greek or Latin roots that describe the parasite's shape, host, or discoverer. Toxoplasma means bow-shaped, Necator americanus is the American killer, Enterobius vermicularis is the little worm that lives in the gut, and Cymothoa exigua is the tongue-eating louse. Common names are blunter and often better for fiction: guinea worm, screwworm, liver fluke, brain-eating amoeba.

Fictional parasites borrow that structure. To coin a convincing Latin binomial, pick a root for what the parasite eats or where it lives (cerebro-, cardio-, ossi-, sanguis-) and add -phaga (eater), -vorax (devourer), -vermis (worm), or -trix, then finish with a species epithet such as insidiosa, tenax, or somnifer. Horror and science fiction also use quiet euphemisms (The Passenger, The Guest, The Kindness) that suggest the host no longer notices anything is wrong, and short folk names like Whisperworm or Hollowmind for something villagers might dread.

The list here mixes genuine species from medical parasitology with invented binomials, folk names, life-cycle stages, diseases, lab designations, original sci-fi and tabletop parasites, and the famous parasites of film and games, so you can pitch a creature at the right register, whether that is a textbook, a lab log, or a campfire story.

How to choose parasite names

  • For a fictional Latin name, keep the genus capitalised and the species lowercase, and italicise both in prose; readers instantly read the format as scientific.
  • Build genus names from real roots so they carry meaning: cerebro (brain), cardio (heart), ossi (bone), derma (skin), sanguis (blood), plus -phaga, -vorax, or -vermis.
  • Choose the register on purpose: a binomial reads clinical, a folk name like Marrowmoth reads rural horror, and a euphemism like The Guest reads psychological horror.
  • Real life cycles are stranger than fiction, so borrow one: Leucochloridium makes snails look like caterpillars, Ophiocordyceps steers ants, and Sacculina castrates crabs and controls their behaviour.
  • Give the disease a different name from the parasite, as medicine does (Trypanosoma brucei causes sleeping sickness); it makes an invented world feel documented.

Frequently asked questions

How are real parasites named?

Parasites use standard binomial nomenclature: a genus (Plasmodium) and a species (falciparum), often built from Latin or Greek roots that describe shape, host, or symptom, or honouring a discoverer, as in Naegleria fowleri. Common names such as hookworm and liver fluke describe what the parasite does or where it lives.

How do I invent a scientific-sounding parasite name?

Combine a Greek or Latin root for the target organ or food (cerebro-, cardio-, ossi-, sanguis-) with a suffix meaning eater or worm (-phaga, -vorax, -vermis) to make the genus, then add a descriptive species epithet like insidiosa, tenax, or somnifer. Cerebrophaga insidiosa reads as a plausible brain-eating parasite.

What are the most famous fictional parasites?

The Xenomorph facehugger and chestburster (Alien), Goa'uld (Stargate), Yeerks (Animorphs), Ceti eels (Star Trek II), headcrabs (Half-Life), the Cordyceps infection (The Last of Us), Las Plagas (Resident Evil 4), the Flood (Halo), the Venom symbiote, and Migi from Parasyte.

Can I use these parasite names in a published game or story?

Real species names are scientific nomenclature that anyone may use. The invented binomials, folk names, and euphemisms here were not checked against existing books, games, or trademarks, so search a name before you publish it. Franchise creatures such as the Xenomorph, Goa'uld, Yeerk, and Headcrab are protected and should only appear in fan works.

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All 1,000 parasite names

This is the complete list the generator above draws its random batches from, sorted A to Z and grouped by first letter.

Plain text, one name per line.

A: 55 names

  • Acanthamoeba castellanii
  • Acanthocephalus lucii
  • Acanthocheilonema reconditum
  • Acarapis woodi
  • Adrenovermis furens
  • Aelurostrongylus abstrusus
  • Aestivorax torrida
  • Airlock Lichen
  • Alaria americana
  • Amber Tick
  • Amblyomma americanum
  • Amblyomma maculatum
  • Amblyomma variegatum
  • Amicophaga tenera
  • Ampulex compressa
  • Amyloodinium ocellatum
  • Anchor Worm
  • Ancylostoma braziliense
  • Ancylostoma caninum
  • Ancylostoma ceylanicum
  • Ancylostoma duodenale
  • Angiostrongylus cantonensis
  • Angiostrongylus costaricensis
  • Angiostrongylus vasorum
  • Anguillicola crassus
  • Anilocra physodes
  • Animaphaga vacua

A, continued

  • Anisakis pegreffii
  • Anisakis simplex
  • Anoplocephala magna
  • Anoplocephala perfoliata
  • Aphanomyces astaci
  • Aphidius ervi
  • Apocephalus borealis
  • Arceuthobium americanum
  • Argas persicus
  • Argulus foliaceus
  • Argulus japonicus
  • Armillaria ostoyae
  • Armillifer armillatus
  • Armour Limpet
  • Arteriotrix vagans
  • Ascaridia galli
  • Ascaris lumbricoides
  • Ascaris suum
  • Ash Louse
  • Ashcradle
  • Aspiculuris tetraptera
  • Astrocysta invadens
  • Astromyces orbitalis
  • Astrotaenia errabunda
  • Astrovorax peregrina
  • Auchmeromyia senegalensis
  • Auriacarus murmurans
  • Auriculovermis susurrans

B: 48 names

  • Babesia bigemina
  • Babesia caballi
  • Babesia divergens
  • Babesia gibsoni
  • Babesia microti
  • Balamuthia mandrillaris
  • Balanophora fungosa
  • Balantidium coli
  • Barber's Pole Worm
  • Barnacle Fluke
  • Batrachochytrium dendrobatidis
  • Batrachochytrium salamandrivorans
  • Baylisascaris procyonis
  • Beauveria bassiana
  • Beaver Fever
  • Bed Bug
  • Beechdrops
  • Beef Tapeworm
  • Beekeeper's Sorrow
  • Beggar's Louse
  • Bellworm
  • Benedenia seriolae
  • Besnoitia besnoiti
  • Bilharzia

B, continued

  • Blackwater Fluke
  • Blastocystis hominis
  • Blightcap
  • Blood Fluke
  • Bloodroot Blight
  • Body Snatcher Pod
  • Bombus bohemicus
  • Bonamia ostreae
  • Bonebloom
  • Bonewick
  • Botfly
  • Bovicola bovis
  • Bradyzoite
  • Brain-Eating Amoeba
  • Brainstem Limpet
  • Brannoch Scab
  • Brood Mother
  • Broomrape
  • Brown-Headed Cowbird
  • Brugia malayi
  • Brugia timori
  • Bruise Mite
  • Bulkhead Creeper
  • Bunostomum phlebotomum

C: 115 names

  • Calabar Swelling
  • Calicophoron daubneyi
  • Caligus elongatus
  • Caligus rogercresseyi
  • Caloriphilus hospitis
  • Camallanus cotti
  • Candiru
  • Candleleech
  • Capillaria hepatica
  • Capillaria philippinensis
  • Capillovermis serpens
  • Cardiobdella rubens
  • Cardiophaga lenta
  • Cassytha filiformis
  • Castor Bean Tick
  • Cellar Wick
  • Cephalophilus obsequens
  • Cephenemyia trompe
  • Ceratonova shasta
  • Ceratophyllus gallinae
  • Ceratothoa oestroides
  • Cercaria
  • Cerebricola quietus
  • Cerebrocysta ambulans
  • Cerebrophaga insidiosa
  • Cerebrovorax dormiens
  • Ceti Eel
  • Chabertia ovina
  • Chagas Disease
  • Chestburster
  • Cheyletiella blakei
  • Cheyletiella yasguri
  • Chigger
  • Chigoe Flea
  • Chilodonella piscicola
  • Chilomastix mesnili
  • Chordonema tensum
  • Chorioptes bovis

C, continued

  • Chorus Spore
  • Chrysomya bezziana
  • Cimex hemipterus
  • Cimex lectularius
  • Cinderlouse
  • Clade Nightshade
  • Clamator glandarius
  • Claviceps purpurea
  • Clonorchis sinensis
  • Cochliomyia hominivorax
  • Cochliomyia macellaria
  • Conopholis americana
  • Contracaecum osculatum
  • Convictor perpetuus
  • Cookiecutter Shark
  • Coolant Leech
  • Cooper's Canker
  • Cooperia oncophora
  • Copper Tapeworm
  • Coracidium
  • Coral Leech
  • Cordicola patiens
  • Cordiphaga silens
  • Cordyceps Infected
  • Cordyceps militaris
  • Cordyceps sapiens
  • Cordylobia anthropophaga
  • Corpse Lily
  • Cortex Bloom
  • Corticophaga muta
  • Cortiphaga oblita
  • Corvermis pulsans
  • Cosmovermis lucens
  • Cotesia congregata
  • Cotesia glomerata
  • Crab Hacker Barnacle
  • Cradle Fluke
  • Cradle Rot

C, continued

  • Cranioacarus fossor
  • Cranioclasta cavans
  • Creeping Eruption
  • Crenosoma vulpis
  • Crew Louse
  • Cribgall
  • Crithidia bombi
  • Crown Tick
  • Cryobdella glacialis
  • Cryosleep Tick
  • Cryptocaryon irritans
  • Cryptosporidium baileyi
  • Cryptosporidium hominis
  • Cryptosporidium muris
  • Cryptosporidium parvum
  • Ctenocephalides canis
  • Ctenocephalides felis
  • Cuckoo Bee
  • Cuckoo Catfish
  • Cuckoo Spawn
  • Cuckoo Wasp
  • Cuculus canorus
  • Culture Black
  • Cunavermis infans
  • Cuscuta campestris
  • Cuscuta epithymum
  • Cuscuta europaea
  • Cuscuta reflexa
  • Custodula fida
  • Cuterebra emasculator
  • Cuterebra fontinella
  • Cutivorax pruriens
  • Cyclospora cayetanensis
  • Cymothoa excisa
  • Cymothoa exigua
  • Cysticercus
  • Cystoisospora belli
  • Cytauxzoon felis
  • Cytinus hypocistis

D: 42 names

  • Dactylogyrus vastator
  • Dauer Larva
  • Davainea proglottina
  • Dead-End Host
  • Deepwater Rider
  • Deer Ked
  • Demodex brevis
  • Demodex folliculorum
  • Dentiphaga rodens
  • Dermacentor andersoni
  • Dermacentor reticulatus
  • Dermacentor variabilis
  • Dermanyssus gallinae
  • Dermaphagus reptans
  • Dermatobia hominis
  • Dermatomyces velutinus
  • Dermatonema aureum
  • Dibothriocephalus nihonkaiensis
  • Dicrocoelium dendriticum
  • Dicrocoelium hospes
  • Dictyocaulus filaria

D, continued

  • Dictyocaulus viviparus
  • Dientamoeba fragilis
  • Dinocampus coccinellae
  • Dioctophyme renale
  • Diphyllobothrium latum
  • Diplostomum spathaceum
  • Diplozoon paradoxum
  • Dipylidium caninum
  • Dirofilaria immitis
  • Dirofilaria repens
  • Dirofilaria tenuis
  • Ditchcanker
  • Dodder
  • Dracunculus insignis
  • Dracunculus medinensis
  • Driftseed
  • Drossmoth
  • Dulciphaga avida
  • Dunmere Itch
  • Duskthorn
  • Dwarf Tapeworm

E: 40 names

  • East Coast Fever
  • Echidnophaga gallinacea
  • Echinococcus canadensis
  • Echinococcus equinus
  • Echinococcus granulosus
  • Echinococcus multilocularis
  • Echinococcus vogeli
  • Echinorhynchus truttae
  • Echinostoma revolutum
  • Eimeria acervulina
  • Eimeria maxima
  • Eimeria stiedae
  • Eimeria tenella
  • Elephantiasis
  • Emerald Cockroach Wasp
  • Encarsia formosa
  • Encephalitozoon cuniculi
  • Encephalitozoon hellem
  • Encephalomyces coronatus
  • Encephalotrema mendax
  • Endolimax nana
  • Entamoeba coli
  • Entamoeba dispar
  • Entamoeba hartmanni
  • Entamoeba histolytica
  • Entamoeba moshkovskii
  • Enterobius vermicularis
  • Enterocytozoon bieneusi
  • Enterocytozoon hepatopenaei
  • Entomophaga maimaiga
  • Entomophthora muscae
  • Epifagus virginiana
  • Ergasilus sieboldi
  • Euderus set
  • Euhaplorchis californiensis
  • Eurytrema pancreaticum
  • Eustrongylides tubifex
  • Exophaga terrestris
  • Eye Worm
  • Eyelash Mite

F: 18 names

  • Familiar's Flea
  • Fasciola gigantica
  • Fasciola hepatica
  • Fascioloides magna
  • Fasciolopsis buski
  • Fauxparasitus benignus
  • Felicola subrostratus
  • Fenwick's Rot
  • Ferryman's Leech
  • Filariform Larva
  • Filiavermis dulcis
  • Filum memoriae
  • Fish Tapeworm
  • Flood Infection Form
  • Fly Strike
  • Follicula reptans
  • Freeloader
  • Frostleech

G: 37 names

  • Gallowfluke
  • Ganglioclasta rigens
  • Ganglion Crab
  • Gapeworm
  • Gasterophilus intestinalis
  • Gasterophilus nasalis
  • Gastrodiscoides hominis
  • Ghost Pipe
  • Ghost Tapeworm
  • Ghostgill
  • Giant Kidney Worm
  • Giardia lamblia
  • Giardia muris
  • Gill Rider
  • Glandulotrix mendica
  • Glass Leech
  • Gloamtick
  • Glochidium
  • Glossina morsitans
  • Glossina palpalis
  • Glossiphonia complanata
  • Glossobdella adhaerens
  • Glyptapanteles indiensis
  • Gnathia maxillaris
  • Gnathostoma spinigerum
  • Goa'uld
  • Gongylonema pulchrum
  • Gordian Worm
  • Graftling
  • Grave Cuckoo
  • Gravedigger's Grub
  • Green-Banded Broodsac
  • Grinning Cyst
  • Ground Itch
  • Guinea Worm
  • Gyrodactylus salaris
  • Gyrodactylus turnbulli

H: 64 names

  • Habronema muscae
  • Haemadipsa zeylanica
  • Haemaphysalis longicornis
  • Haematobia irritans
  • Haematopinus asini
  • Haematopinus suis
  • Haementeria ghilianii
  • Haemonchus contortus
  • Haemoproteus columbae
  • Hagburr
  • Halicephalobus gingivalis
  • Halipegus occidualis
  • Halitophaga foetida
  • Hammondia hammondi
  • Hanger-On
  • Haplorchis taichui
  • Haplosporidium nelsoni
  • Harrowmite
  • Harvest Mite
  • Head Louse
  • Headcrab
  • Hearthlouse
  • Heartworm
  • Heligmosomoides polygyrus
  • Henneguya salminicola
  • Hepatophaga vorax
  • Hepatotrix flava
  • Hepatozoon canis
  • Heterakis gallinarum
  • Heteronetta atricapilla
  • Heterophyes heterophyes
  • Hexamita salmonis

H, continued

  • Hiemavermis gelida
  • Hippobosca equina
  • Hirudo medicinalis
  • Hirudo verbana
  • Histomonas meleagridis
  • Hitcher
  • Hivethread
  • Hollowbrood
  • Hollowmind
  • Honeyguide
  • Hookworm
  • Horsehair Worm
  • Hospesphila lucida
  • Hospitella comes
  • Hospitivorax fidelis
  • Host Zero
  • Hull Barnacle
  • Hullwright Spore
  • Hushroot
  • Hyalomma marginatum
  • Hydatid Cyst
  • Hydnora africana
  • Hymenoepimecis argyraphaga
  • Hymenolepis diminuta
  • Hymenolepis microstoma
  • Hymenolepis nana
  • Hyperparasite
  • Hypnonema placidum
  • Hypnozoite
  • Hypoderma bovis
  • Hypoderma lineatum
  • Hypoderma tarandi

I: 17 names

  • Ichneumon Wasp
  • Ichthyobodo necator
  • Ichthyophthirius multifiliis
  • Ilvane Fever
  • Imitatrix humana
  • Index Case
  • Indicator indicator
  • Interloper
  • Iodamoeba butschlii
  • Isolate Theta-4
  • Itch Mite
  • Ivory Louse
  • Ixodes holocyclus
  • Ixodes pacificus
  • Ixodes persulcatus
  • Ixodes ricinus
  • Ixodes scapularis

J: 3 names

  • Jecoricola amarus
  • Jigger
  • Jockey

K: 9 names

  • Kaathis Bloom
  • Kala-Azar
  • Kessarion Wyrm
  • Kindworm
  • Kissing Bug
  • Kleptoparasite
  • Klyntar
  • Knemidokoptes mutans
  • Kudoa thyrsites

L: 47 names

  • Lace Fluke
  • Lacrimatrix salsa
  • Lamplighter's Cough
  • Lamprey
  • Lancet Fluke
  • Lantern Rot
  • Larderleech
  • Larvicola hominis
  • Las Plagas
  • Latebrosoma occultum
  • Lathraea squamaria
  • Leishmania aethiopica
  • Leishmania amazonensis
  • Leishmania braziliensis
  • Leishmania donovani
  • Leishmania guyanensis
  • Leishmania infantum
  • Leishmania major
  • Leishmania mexicana
  • Leishmania panamensis
  • Leishmania tropica
  • Lepeophtheirus salmonis
  • Leptopilina boulardi

L, continued

  • Lernaea cyprinacea
  • Lernaeocera branchialis
  • Leucochloridium paradoxum
  • Leucocytozoon simondi
  • Lich Moss
  • Ligula intestinalis
  • Limnatis nilotica
  • Linguatula serrata
  • Linguavora muta
  • Linognathus setosus
  • Linognathus vituli
  • Lipoptena cervi
  • Litomosoides sigmodontis
  • Liver Fluke
  • Loa loa
  • Loma salmonae
  • Lone Star Tick
  • Loxothylacus texanus
  • Lucilia sericata
  • Lullgrub
  • Lunaphaga crescens
  • Lung Fluke
  • Lymphotrix pallida
  • Lymphovorax candida

M: 56 names

  • Macracanthorhynchus hirudinaceus
  • Macrobdella decora
  • Malaria
  • Mange
  • Mansonella ozzardi
  • Mansonella perstans
  • Mansonella streptocerca
  • Marchworm
  • Marrowfever
  • Marrowmoth
  • Marteilia refringens
  • Massospora cicadina
  • Medicinal Leech
  • Medullaphaga alba
  • Medullavermis pallens
  • Mellivorax dulcedinis
  • Melophagus ovinus
  • Memoriphaga lenta
  • Memory Moth
  • Menopon gallinae
  • Mentiphaga clemens
  • Mermis nigrescens
  • Merozoite
  • Mesocestoides lineatus
  • Metacercaria
  • Metagonimus yokogawai
  • Metarhizium anisopliae
  • Metastrongylus apri

M, continued

  • Metorchis conjunctus
  • Metroid
  • Microfilaria
  • Midwife's Thread
  • Migi
  • Milkfever Mite
  • Miller's Blight
  • Mimic Fluke
  • Mimosoma perfectum
  • Miracidium
  • Mirror Larva
  • Mistletoe
  • Mnemophilus avarus
  • Molothrus ater
  • Molothrus bonariensis
  • Moniezia benedeni
  • Moniezia expansa
  • Moniliformis moniliformis
  • Monotropa uniflora
  • Moon Flea
  • Morwen Gall
  • Mother's Thread
  • Mournmidge
  • Muellerius capillaris
  • Murmurgnat
  • Myelonema frigidum
  • Myotaenia contracta
  • Myxobolus cerebralis

N: 41 names

  • Naegleria fowleri
  • Naegleria gruberi
  • Nagana
  • Name Thief
  • Nanophyetus salmincola
  • Nasal Bot
  • Nasonia vitripennis
  • Necator americanus
  • Necromyces surgens
  • Necrovorax hominis
  • Nematodirus battus
  • Nemestrinus caucasicus
  • Neobenedenia melleni
  • Neoechinorhynchus rutili
  • Neospora caninum
  • Nervitrix ardens
  • Nestling
  • Neural Parasite
  • Neurocysta ridens
  • Neuronema argenteum

N, continued

  • Neuronema tacita
  • Neurophilus rex
  • Neurosoma duplex
  • Neurotaenia longissima
  • Nidulus cordis
  • Nightlodger
  • Nightsprout
  • Nihilophaga
  • Ninth Passenger
  • Nippostrongylus brasiliensis
  • Noctiphilus errans
  • Nodulophaga tumens
  • Nosema apis
  • Nosema bombycis
  • Nosema ceranae
  • Nosopsyllus fasciatus
  • Notoedres cati
  • Nubilotrix gravis
  • Nulltrix
  • Nutrixphaga lactea
  • Nyctobdella sitiens

O: 44 names

  • Oathgrub
  • Ocellotrix caeca
  • Oculicola vitreus
  • Oculovermis caecans
  • Oesophagostomum bifurcum
  • Oesophagostomum dentatum
  • Oestrus ovis
  • Ommatokoita elongata
  • Onchocerca lupi
  • Onchocerca volvulus
  • Oncosphere
  • Oneiromyces mirabilis
  • Oocyst
  • Ophiocordyceps camponoti-rufipedis
  • Ophiocordyceps sapiens
  • Ophiocordyceps sinensis
  • Ophiocordyceps unilateralis
  • Ophthalmonema lucidum
  • Opisthorchis felineus
  • Opisthorchis viverrini
  • Orbital Blight
  • Organism Lambda

O, continued

  • Oriental Rat Flea
  • Oriental Sore
  • Ormia ochracea
  • Ornithodoros hermsi
  • Ornithodoros moubata
  • Ornithonyssus bacoti
  • Ornithonyssus sylviarum
  • Orobanche minor
  • Orobanche ramosa
  • Orrin's Blight
  • Osculophaga tacita
  • Ossicola eburneus
  • Ossicorrodens fragilis
  • Ossiphaga latens
  • Ossivora tenax
  • Osteomyces ramosus
  • Ostertagia ostertagi
  • Ostrel Wilt
  • Otobius megnini
  • Otodectes cynotis
  • Oxyuris equi
  • Ozobranchus branchiatus

P: 76 names

  • Pale Tenant
  • Palpebracarus minimus
  • Paragonimus africanus
  • Paragonimus heterotremus
  • Paragonimus kellicotti
  • Paragonimus mexicanus
  • Paragonimus westermani
  • Paragordius tricuspidatus
  • Paralysis Tick
  • Paramphistomum cervi
  • Parascaris equorum
  • Parasitaster minor
  • Parasitoid
  • Paratenic Host
  • Parelaphostrongylus tenuis
  • Passalurus ambiguus
  • Patient Zero
  • Pearlfish
  • Pebrine
  • Pediculus capitis
  • Pediculus humanus
  • Peltogaster paguri
  • Pennella balaenopterae
  • Pentatrichomonas hominis
  • Perkinsus marinus
  • Phantasoma inane
  • Phengaris alcon
  • Philornis downsi
  • Phoradendron leucarpum
  • Physaloptera praeputialis
  • Pillowtick
  • Pilot Fungus
  • Pin-Tailed Whydah
  • Pinworm
  • Piscicola geometra
  • Placobdella parasitica
  • Planidium
  • Plasmodium berghei

P, continued

  • Plasmodium chabaudi
  • Plasmodium cynomolgi
  • Plasmodium falciparum
  • Plasmodium gallinaceum
  • Plasmodium knowlesi
  • Plasmodium malariae
  • Plasmodium ovale
  • Plasmodium relictum
  • Plasmodium vivax
  • Plasmodium yoelii
  • Platynosomum fastosum
  • Plerocercoid
  • Pluviophaga madida
  • Pneumomyces niveus
  • Pneumonyssoides caninum
  • Polyergus rufescens
  • Polymorphus minutus
  • Polypodium hydriforme
  • Polystoma integerrimum
  • Pomphorhynchus laevis
  • Porcelain Tick
  • Pork Tapeworm
  • Priest's Cyst
  • Proglottid
  • Prosthogonimus macrorchis
  • Protostrongylus rufescens
  • Pseudacteon tricuspis
  • Pseudodactylogyrus anguillae
  • Pseudogymnoascus destructans
  • Pseudoterranova decipiens
  • Psoroptes ovis
  • Psychophilus blandus
  • Pthirus pubis
  • Pulex irritans
  • Pulmoclasta serpens
  • Pulmonicola anhelans
  • Pulmovermis fumosa
  • Puppeteer

Q: 2 names

  • Quellwyrm
  • Quillon Murrain

R: 24 names

  • Radicivermis tenuis
  • Rafflesia arnoldii
  • Raillietina tetragona
  • Rat Lungworm
  • Reclinervellus nielseni
  • Redcap Fungus
  • Redia
  • Reef Louse
  • Renophaga turbida
  • Reservoir Host
  • Retortamonas intestinalis
  • Rhinanthus minor
  • Rhipicephalus appendiculatus
  • Rhipicephalus microplus
  • Rhipicephalus sanguineus
  • Rhodnius prolixus
  • Ribcage Anemone
  • Ribeiroia ondatrae
  • Ricketmite
  • Rider
  • River Blindness
  • Roundworm
  • Rune Mite
  • Rust Fluke

S: 95 names

  • Sacculina carcini
  • Sacculina gregaria
  • Sailor's Worm
  • Sallowmite
  • Salmincola californiensis
  • Salmon Louse
  • Salt Worm
  • Sample 31-Delta
  • Sand Fly
  • Sanguisuga noctis
  • Sanguivorax pallidus
  • Saprolegnia parasitica
  • Sarcocystis hominis
  • Sarcocystis neurona
  • Sarcoptes scabiei
  • Scabies
  • Schistocephalus solidus
  • Schistosoma haematobium
  • Schistosoma intercalatum
  • Schistosoma japonicum
  • Schistosoma mansoni
  • Schistosoma mekongi
  • Schistosoma spindale
  • Schizont
  • Scolex
  • Screwworm
  • Sensivorax mutila
  • Setaria equina
  • Sethrix Cyst
  • Shadow Remora
  • Sheep Scab

S, continued

  • Shepherd's Itch
  • Sideravorax vagus
  • Simulatrix amabilis
  • Sinusella furtiva
  • Skarn Fever
  • Sleeper
  • Sleeping Sickness
  • Sleepnit
  • Sleepthorn
  • Slither
  • Smoke Mite
  • Snail Fever
  • Somniclasta vigilans
  • Somnicola profundus
  • Somnivermis regina
  • Somnotaenia pigra
  • Songfluke
  • Sootveil
  • Sorrowspore
  • Soul Barnacle
  • Specimen Nine
  • Spell Louse
  • Sphaerularia bombi
  • Spinochordodes tellinii
  • Spinophaga curvans
  • Spinostrongylus rigidus
  • Spinovorax dorsalis
  • Spirocerca lupi
  • Spirometra erinaceieuropaei
  • Spirometra mansonoides
  • Spironucleus muris
  • Splenovorax atra

S, continued

  • Sporocyst
  • Sporozoite
  • Squatter
  • Starbriar
  • Steersman
  • Steinernema carpocapsae
  • Stellavermis remota
  • Stephanurus dentatus
  • Sticktight Flea
  • Stillwater Nit
  • Stomach Bot
  • Stomoxys calcitrans
  • Strain Morpheus
  • Striga hermonthica
  • Strongyloides fuelleborni
  • Strongyloides papillosus
  • Strongyloides ratti
  • Strongyloides stercoralis
  • Strongyloides westeri
  • Strongylus edentatus
  • Strongylus vulgaris
  • Stylops melittae
  • Subject Cuckoo
  • Sudorivermis calida
  • Sunspot Fluke
  • Surra
  • Susurrus intimus
  • Swimmer's Itch
  • Symbiotrix mendax
  • Synapse Vine
  • Syngamus trachea
  • Syphacia obvelata

T: 106 names

  • Tacitulus hospitis
  • Taenia asiatica
  • Taenia crassiceps
  • Taenia hydatigena
  • Taenia multiceps
  • Taenia pisiformis
  • Taenia saginata
  • Taenia solium
  • Taenia taeniaeformis
  • Tallow Grub
  • Tallowgnat
  • Tanner's Tick
  • Tarantula Hawk
  • Teladorsagia circumcincta
  • Ternidens deminutus
  • Tessimer Canker
  • Tetracapsuloides bryosalmonae
  • Thalassobdella abyssalis
  • Thanatonema tardum
  • Thatcher's Burr
  • The Arrangement
  • The Borrower
  • The Calm
  • The Chaperone
  • The Companion
  • The Guest
  • The Heirloom
  • The Houseguest
  • The Hum
  • The Inheritance
  • The Kindness
  • The Lodger
  • The Nursemaid
  • The Other Heartbeat
  • The Passenger

T, continued

  • The Quiet
  • The Second Voice
  • The Small Mercy
  • The Stowaway
  • The Tenant
  • The Third Lung
  • The Understudy
  • Theileria annulata
  • Theileria equi
  • Theileria orientalis
  • Theileria parva
  • Thelazia callipaeda
  • Thessic Bloom
  • Thimble Tick
  • Thistlegrub
  • Thorny-Headed Worm
  • Thought Leech
  • Threadfever
  • Threadworm
  • Throat Orchid
  • Thyrophaga torpida
  • Thysanosoma actinioides
  • Tick Paralysis
  • Tidewire
  • Tiger Leech
  • Timoriphaga gelans
  • Tongue Eater
  • Toothwort
  • Toxascaris leonina
  • Toxocara canis
  • Toxocara cati
  • Toxocara vitulorum
  • Toxoplasma gondii
  • Toxoplasma sapiens
  • Tracheal Mite

T, continued

  • Triatoma infestans
  • Trichinella britovi
  • Trichinella nativa
  • Trichinella pseudospiralis
  • Trichinella spiralis
  • Trichinosis
  • Trichobilharzia regenti
  • Trichodectes canis
  • Trichodina pediculus
  • Trichogramma brassicae
  • Trichomonas vaginalis
  • Trichostrongylus axei
  • Trichostrongylus colubriformis
  • Trichuris muris
  • Trichuris trichiura
  • Trichuris vulpis
  • Tritrichomonas foetus
  • Troglotrema acutum
  • Trombicula autumnalis
  • Trophozoite
  • Tropilaelaps clareae
  • Trypanosoma brucei
  • Trypanosoma congolense
  • Trypanosoma cruzi
  • Trypanosoma equiperdum
  • Trypanosoma evansi
  • Trypanosoma gambiense
  • Trypanosoma lewisi
  • Trypanosoma rangeli
  • Trypanosoma rhodesiense
  • Trypanosoma theileri
  • Tsetse Fly
  • Tumbu Fly
  • Tunga penetrans
  • Twisted-Wing Insect
  • Type-3 Symbiont

U: 8 names

  • Umbral Cyst
  • Umbravermis diurna
  • Umbricola fugax
  • Uncinaria stenocephala
  • Unguiphaga scabra
  • Unknown Helminth Six
  • Usurper
  • Uterovermis gravida

V: 27 names

  • Vacuitrix nulla
  • Vacuum Spore
  • Vahl Rot
  • Vairimorpha necatrix
  • Vampire Finch
  • Variant Lullaby
  • Varroa destructor
  • Varroa jacobsoni
  • Vector Prime
  • Velvet Leech
  • Venaphaga rubra
  • Venicola nocturnus
  • Venom Symbiote
  • Ventivorax stridens
  • Ventriculus tenebrae
  • Vermis somnifer
  • Vesicaphaga stillans
  • Vesperflea
  • Vidua macroura
  • Viscum album
  • Vocicola imitans
  • Vocivermis cantans
  • Vocivorax rauca
  • Voidmoss
  • Voidophage
  • Voluntavermis serva
  • Vorlun Rot

W: 17 names

  • Warble Fly
  • Watsonius watsoni
  • Weaver's Nit
  • Weeping Wart
  • Weepmoss
  • Whale Louse
  • Whipworm
  • Whirling Disease
  • Whisperworm
  • White-Nose Syndrome
  • Wick Fever
  • Widow's Fluke
  • Wintermite
  • Witchweed
  • Wohlfahrtia magnifica
  • Wormsong
  • Wuchereria bancrofti

X: 5 names

  • Xenocysta migrans
  • Xenomorph Facehugger
  • Xenopsylla cheopis
  • Xenos vesparum
  • Xenovermis stellaris

Y: 2 names

  • Yeerk
  • Yrl Spore

Z: 2 names

  • Zerg Larva
  • Zombie-Ant Fungus