protozoa monochrome seamless pattern

microorganism biology bacteria vector science organism microbiology bacterium microscopic microbe health medical micro virus medicine infection bacillus set illness disease germ icon pathogen human ill danger symbol immune amoeba education protozoa euglena protozoan structure cytoplasm diagram cellular nucleus laboratory membrane vacuole eukaryotic trypanosome giardia plasmodium paramecium trichomonas toxoplasma leishmania balantidium