definition
Any of the diverse group of eukaryotes, of the phylum Protozoa, that are primarily unicellular, existing singly or aggregating into colonies, are usually nonphotosynthetic, and are often classified further into phyla according to their capacity for and means of motility, as by pseudopods, flagella, or cilia.
definition
Of, pertaining to, or characteristic of a protozoan.
This is the blastula stage occurring universally in all Metazoa, probably representing an ancestral Protozoan colony in phylogeny.
Particular interests include waterborne bacteria, viruses and protozoan parasites.
He used flasks of different species of the protozoan paramecium, which eats bacteria.
Giardiasis is caused by the protozoan Giardia lamblia which infects the small intestine.
In other words, under the heading Sporozoa, as at present used, are included two entirely independent series of Protozoan parasites; the general resemblances which these exhibit are due to convergence brought about by their specialized mode of life.
From the more complex colonial Protozoa the Coelentera are readily separated by their possession of two distinct sets of cells, with diverse functions, arranged in two definite layers, - a condition found in no Protozoan.
Amebic dysentery is caused by the protozoan parasite Entamoeba histolytica.
There is evidence that a protozoan parasite (Dientamoeba fragilis) is transmitted among humans in the eggs of pinworms.
Toxoplasmosis-A parasitic infection caused by the intracellular protozoan Toxoplasmosis gondii.
Pneumocystis carinii-A parasite transitional between a fungus and protozoan, frequently occurring as aggregate forms existing within rounded cystlike structures.
Hole in the head disease is not as common in golfish, but it is mainly caused by poor water quality that allows protozoan parasite and bacteria to flourish.