Protozoa and its important features
Protozoa is eukaryotic (Single-celled) type. Protozoa is acellular type organisms. Protozoa is a part of the living creatures. Protozoa can be large as 1 mm. Protozoa is easily seen by microscope.
Historically, protozoa were defined as single-celled organisms with animal-like behaviors, such as motility and predation.
The terms protozoa and protozoans are also used informally to designate single-celled, non-photosynthetic protists, such as ciliates, amoebae and flagellates.
The term Protozoa was introduced in 1818 for a taxonomic class.
The word “protozoa” (singular protozoon, or protozoan) was coined in 1818, by zoologist Georg August Goldfuss, as the Greek equivalent of the German “Urthiere,” meaning “primitive, or original animals”.
Protozoa, as traditionally defined, are mainly microscopic organisms, ranging in size from 10 to 52 micrometers.
Many protozoan species are symbionts, some are parasites, and some are predators of bacteria, algae and other protists.
Protozoa reproduce asexually by binary fission or multiple fission. Many protozoan species exchange genetic material by sexual means (typically, through conjugation)
Protozoa have been divided traditionally on the basis of their means of locomotion.
Amoeboids (e.g., Entamoeba histolytica)
Entamoeba histolytica cyst
Microsporidia (now in Fungi)
Flagellates (e.g., Giardia lamblia)
Apicomplexa (now in Alveolata)
Sporozoans (e.g., Plasmodium knowlesi)
Ciliates (e.g., Balantidium coli)
Myxosporidia (now in Cnidaria)
Ascetosporea (now in Rhizaria)
Diseases by Protozoan –
Malignant tarsian malaria Plasmodium falciparnum
Quartan malaria Plasmodium malariae
Benign tertian malaria Plasmodium vivax
Kala-azar Leishmania dovovany
Ovale malaria Plasmodium ovale
Inflammation of vagina Trychomonas vaginalis
Sleeping sickness Trypanosoma gambiense
Giardiasis Giardia intestinalis
Amoebic dysentery Entamoeba histolytica
Pyorrhoea Trychomonas tusox