Page 193 - The Veterinary Laboratory and Field Manual 3rd Edition

162 Susan C. Cork and Mani Lejeune

Table 3.6a Overview of the classification of some protozoa of veterinary
significance.

Phylum disease – characteristic* Genus Genus/species – Examples
Sarcomastigophora Trypanosomiasis/Trypanosomosis Trypanosoma Trypanosoma congolense,
(Nagana, surra, human sleeping T. evansi, T. cruzi, etc.
sickness, Chagas disease, etc.)
Leishmaniasis/Leishmanosis Leishmania Leishmania donovani,
(visceral and cutaneous forms) L. infantum, L. mexicana, etc.
Trichomoniasis/Trichomonosis – Trichomonas Trichomonas foetus,
causes infertility in cattle T. vaginalis, T. gallinae
Histomonosis (Blackhead in Histomonas Histomonas meleagridis
turkeys – associated with
Heterakis sp. nematode
infection)
Giardiasis, Giardiosis –causes Giardia Giardia duodenalis
diarrhoea, ill thrift, malabsorption (Assemblages A-H)
Amoebiasis/Amoebiosis – major Entamoeba Entamoeba histolytica,
cause of serious gastrointestinal E. dispar, E.coli. Some
disease in humans and primates species are commensals
Apicomplexa Coccidiosis – diarrhoea, ill thrift Eimeria Eimeria spp. (there are
many species with varying
degrees of host specificity)
Cystoisospora spp., Isospora
spp., Atoxoplasma sp. (in birds)
Cryptosporidiosis – can be Cryptosporidium Cryptosporidium spp. (around
zoonotic 26 valid species)
Toxoplasmosis – cause abortion Toxoplasma Toxoplasma gondii
in sheep, zoonotic
Neosporosis – cause abortion Neospora Neospora caninum
in cattle
Sarcocystosis – cysts in meat Sacrcocystis Sarcocystis spp.
Babesiosis (Redwater, Tick Babesia Babesia bovis, B. bigemina,
Fever) – hemoglobinuria, fever B. divergens
Theileriosis (East coast fever) – Theileria Theileria parva, T. annulata
fever, enlarged lymph nodes
Malaria – fever in humans, Plasmodium Plasmodium falciparum, etc.
severe and mild forms
Leucocytozoonosis Leucocytozoon Leucocytozoon spp.
Avian malaria – mild and severe Plasmodium, Plasmodium relictum,
forms Haemoproteus Plasmodium spp.
Haemoproteus spp.
Ciliophora Balantidiasis/Balantidiosis, Balantidium, Balantidium coli, Buxtonella
Buxtonellosis – enteritis Buxtonella sulcata
Note: *In the medical world the disease naming convention is -iasis and in the veterinary world -osis. Some in vet world still use -iasis
to indicate subclinical infection. For this chart, we will retain both -iasis and -osis as we have both human and animal parasites listed.

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