protozoans basic classification for easy understanding

1. Classification Of
Veterinary
Protozoans

2. Protozoa
Sarcomastigophor
a
Sporozoa*Microspora
Cilliophora
Sarcodina Mastigophora Coccidia HaemosporidiaPiroplasmida
Class
Subphylum
Phylum
Entamoeba Trypanosoma
Leishmaina
Trichomnas
Histomonas
Hexamita
Gardia
Emeria
Isospora
Toxoplasma
Sarcocystis
Cryptosporidium
Besnoitia
Hammondia
Hepatozoon
Neospora
Babesia
Theileria
Cytauxzoon
Plasmodium
Haemoproteus
Leucocytozoon
Genus
Balantidium
Encephalitozoon
*also called Apicomplexa

3. Sarcomastigophora  Locomotion by Pseudopodia and flagellates
 When amoeboid movement by pseudopodia, such
protozoan are placed in Class Sarcodina (Genus:
Entamoeba)
 They Entamoeba has specie Entamoeba histolytica
 When the protozoan have one or more flagella, they
are placed
in Class Mastigophora (Genus: Trypanosoma,
Leishmaina, Trichomnas, Histomonas, Hexamita,
Gardia)
 The flagellates reproduce by binary fission
 Flagellates are found in variety of host such as
mammals including humans, pigeons, cattle, chicken,
gallinaceous birds etc.

4. Cilliophora
Possesses cilia for locomotion in the tropozoite stage
Possess two types of nuclei i.e. Macronuclei and Micronuclei
They form cyst that are resistant to external environmental condition
They include Balantidium (Balantidium coli)
Balantidium coli is found in pigs, rats, dogs and primates

5. Sporozoa  Also called Apicomplexa
 Locomotion is by gliding
 Obligatory intracellular parasite
 Multiply through strict sequence of asexual
and sexual reproduction
 May have direct and indirect lifecycle
 They include protozoan of class Coccidia,
Piroplasmida and Haemosporidia
 They have a wide host range including
animal like ruminants, horses, dogs, Cattle,
cats, sheep, goat, mammals including
humans, opossums

6. Microspora  Little veterinary significance
 All are intracellular parasites with a
schizogonous and sporogonous stage
 Multiplies asexually
 Most are parasite of fish but also disease are
reported in man, dog, blue fox, rodents an
other mammals
 Example is Encephalitozoon cuniculi

7. Ingestion of infective
spores
Schizoganysporogany
Infective spores
passed in urine
Engulfed by peritoneal
macrophage also in the
kidney and brain(in chronic form)
Inside macrophage
LIFE CYCLE OFMICROSPORA

8. Protozoan of Undetermined
classification
It includes Pneumocystis carinii This organism is often regarded as sporozoan of the
toxoplasmid type
Responsible for pneumonia in man who are very
young, old debilitated or immunosuppressed

9. Reference
 VETERINARY PARASITOLOGY, Second edition by
G.M.URQUHART,
J.ARMOUR,
J.L.DUNCAN,
A.M.DUNN,
F.W.JENNINGS

10. Presented by:
 Dr. Ihtisham ul haq
ihtishamulhaq114@gmail.com