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    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Giardia lamblia flagellated protozoan parasite, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasite, digital illustration.
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasites causing ulcer in intestinal tract. — Stock Photo
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasites causing ulcer in intestinal tract.
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration
    Cell with pseudopodia — Stock Photo
    Cell with pseudopodia
    Hepatic bile duct infected with cocidian protozoa — Stock Photo
    Hepatic bile duct infected with cocidian protozoa
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasites causing ulcer in intestinal tract. — Stock Photo
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasites causing ulcer in intestinal tract.
    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork. — Stock Photo
    Giardia lamblia single-celled protozoan parasite in human duodenum, digital artwork.
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Plasmodium ovale protozoa, digital illustration. — Stock Photo
    Plasmodium ovale protozoa, digital illustration.
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasite causing ulcer in intestinal tract. — Stock Photo
    Digital illustration of ciliate protozoan Balantidium coli intestinal parasite causing ulcer in intestinal tract.
    Plasmodium falciparum protozoan inside red blood cells, computer illustration — Stock Photo
    Plasmodium falciparum protozoan inside red blood cells, computer illustration
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration — Stock Photo
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration
    Acrospaera radiolarian shell — Stock Photo
    Acrospaera radiolarian shell
    Giardia lamblia, a protozoan (cyst stage) found in water contaminated by animal faeces, coloured scanning electron micrograph (SEM). — Stock Photo
    Giardia lamblia, a protozoan (cyst stage) found in water contaminated by animal faeces, coloured scanning electron micrograph (SEM).
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Digital illustration of Acanthamoeba castellanii amoebas on white background. — Stock Photo
    Digital illustration of Acanthamoeba castellanii amoebas on white background.
    Digital illustration of abstract pathogenic microorganisms. — Stock Photo
    Digital illustration of abstract pathogenic microorganisms.
    Plasmodium falciparum protozoan inside red blood cells, computer illustration — Stock Photo
    Plasmodium falciparum protozoan inside red blood cells, computer illustration
    Giardia lamblia flagellated protozoan parasite, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasite, digital illustration.
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, 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.
    Transplacental transmission of Toxoplasma gondii parasites to human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of Toxoplasma gondii parasites to human embryo, conceptual illustration.
    Human embryo and close-up of Toxoplasma gondii parasites, conceptual illustration. — Stock Photo
    Human embryo and close-up of Toxoplasma gondii parasites, conceptual illustration.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Digital artwork of abstract pathogenic microorganism in human large intestine. — Stock Photo
    Digital artwork of abstract pathogenic microorganism in human large intestine.
    Giardia lamblia single-celled protozoan parasites in human duodenum, digital artwork. — Stock Photo
    Giardia lamblia single-celled protozoan parasites in human duodenum, digital artwork.
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Toxoplasma gondii in blood, digital illustration. — Stock Photo
    Toxoplasma gondii in blood, digital illustration.
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Protozoan infection in human intestinal lumen — Stock Photo
    Protozoan infection in human intestinal lumen
    Giardia lamblia flagellated protozoan parasites, digital illustration. — Stock Photo
    Giardia lamblia flagellated protozoan parasites, digital illustration.
    Digital illustration of Acanthamoeba castellanii amoebas. — Stock Photo
    Digital illustration of Acanthamoeba castellanii amoebas.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Protozoan infection in human intestinal lumen — Stock Photo
    Protozoan infection in human intestinal lumen
    Acanthamoeba castellanii amoeba in cerebrospinal fluid, digital illustration. — Stock Photo
    Acanthamoeba castellanii amoeba in cerebrospinal fluid, digital illustration.
    Entamoeba histolytica consuming red blood cells — Stock Photo
    Entamoeba histolytica consuming red blood cells
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration — Stock Photo
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Phase contrast light micrograph of Paramecium a ciliate protozoan. — Stock Photo
    Phase contrast light micrograph of Paramecium a ciliate protozoan.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Close-up of parasitic amoeba in human intestine, digital artwork. — Stock Photo
    Close-up of parasitic amoeba in human intestine, digital artwork.
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Conceptual image of plasmodium causing malaria — Stock Photo
    Conceptual image of plasmodium causing malaria
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.