“None of you realise it yet, but this is an advance as big as the step the first ichthyoid took out of the protozoic sea 300 million years ago.”

“Probably you will remember that during the protozoic period, the inhabitants of the Earth were all deaf, dumb, and sexless.”

“A lustreless protrusive eye Stares from the protozoic slime At a perspective of Canaletto.”

“It is a protozoal parasitic disease prevalent worldwide, its prevalence varying according to dietary preferences in any country.”

“Leishmania are protozoal parasites that are transmitted to humans by Phlebotomus sandflies.”

“Malaria, one of the world's most common and serious tropical diseases, is a protozoal infection transmitted from human to human by mosquitoes.”