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    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. — Stock Photo
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba.
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines — Stock Photo
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa). — Stock Photo
    Differential interference contrast light micrograph of different species of fossil unicellular radiolarians (protozoa).
    Parasitic amoeba engulfing red blood cells — Stock Photo
    Parasitic amoeba engulfing red blood cells
    Plasmodium ovale protozoan, computer illustration. — Stock Photo
    Plasmodium ovale protozoan, computer illustration.
    Parasitic amoeba engulfing red blood cells — Stock Photo
    Parasitic amoeba engulfing red blood cells
    Protozoan Plasmodium falciparum, causative agent of tropical malaria, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria, digital illustration.
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration. — Stock Photo
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration.
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba. — Stock Photo
    Digital illustration of trophozoite form of Acanthamoeba castellanii amoeba.
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    Digital artwork of abstract pathogenic microorganism in human large intestine. — Stock Photo
    Digital artwork of abstract pathogenic microorganism in human large intestine.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Plasmodium falciparum protozoan inside red blood cells, computer illustration — Stock Photo
    Plasmodium falciparum protozoan inside red blood cells, computer illustration
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration.
    Giardia lamblia flagellated protozoan parasite, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasite, digital illustration.
    Group of Trichomonas hominis protozoan parasites, digital illustration. — Stock Photo
    Group of Trichomonas hominis protozoan parasites, digital illustration.
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration.
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration.
    Spore-forming Microsporidia parasite, computer illustration. — Stock Photo
    Spore-forming Microsporidia parasite, computer illustration.
    Giardia lamblia flagellated protozoan parasite, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasite, digital illustration.
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration. — Stock Photo
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration.
    Giardia lamblia flagellated protozoan parasite, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasite, digital illustration.
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration
    Giardia lamblia  single-celled protozoan parasites in human duodenum, digital artwork. — Stock Photo
    Giardia lamblia single-celled protozoan parasites in human duodenum, digital artwork.
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration. — Stock Photo
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration.
    Plasmodium ovale protozoan, computer illustration. — Stock Photo
    Plasmodium ovale protozoan, computer illustration.
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines — Stock Photo
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration.
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Balamuthia mandrillaris amoeba, computer illustration. — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration.
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration. — Stock Photo
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration.
    Spore-forming Microsporidia parasite, computer illustration. — Stock Photo
    Spore-forming Microsporidia parasite, computer illustration.
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria, digital illustration.
    Balamuthia mandrillaris amoeba organism, digital illustration. — Stock Photo
    Balamuthia mandrillaris amoeba organism, digital illustration.
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration. — Stock Photo
    Group of cysts of Giardia intestinalis protozoans flagellated parasites in small intestine, digital illustration.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium malariae protozoan inside red blood cells in the ring-form trophozoite stage, computer illustration
    Digital illustration of trypanosome protozoan parasite causing sleeping sickness transmitted by blood. — Stock Photo
    Digital illustration of trypanosome protozoan parasite causing sleeping sickness transmitted by blood.
    Giardia intestinalis, trophozoite and cyst, flagellated parasite in small intestine, digital illustration. — Stock Photo
    Giardia intestinalis, trophozoite and cyst, flagellated parasite in small intestine, digital illustration.
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Balamuthia mandrillaris amoeba organism, digital illustration. — Stock Photo
    Balamuthia mandrillaris amoeba organism, digital illustration.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoan and red blood cells in blood vessel, computer illustration.
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium — Stock Photo
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium
    Protozoan Plasmodium falciparum cell, causative agent of tropical malaria, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum cell, causative agent of tropical malaria, digital illustration.
    Acanthamoeba castellanii amoeba in cerebrospinal fluid, digital illustration. — Stock Photo
    Acanthamoeba castellanii amoeba in cerebrospinal fluid, digital illustration.
    Digital artwork of abstract pathogenic microorganism in human large intestine. — Stock Photo
    Digital artwork of abstract pathogenic microorganism in human large intestine.

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