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    Spore-forming Microsporidia parasite, computer illustration. — Stock Photo
    Spore-forming Microsporidia parasite, computer illustration.
    Flush toilet microbe on contaminated surface, conceptual digital illustration on white background. — Stock Photo
    Flush toilet microbe on contaminated surface, conceptual digital illustration on white background.
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae — Stock Photo
    E. coli bacteria, illustration. Escherichia coli is a rod-shaped bacterium (bacillus). Its cell membrane is covered in fine filaments called pili or fimbriae
    3d illustration of blue rod-shaped bacteria. — Stock Photo
    3d illustration of blue rod-shaped bacteria.
    Spreading cancer cells on white background, computer illustration. — Stock Photo
    Spreading cancer cells on white background, computer illustration.
    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
    Magnified digital illustration of megakaryocyte cell. — Stock Photo
    Magnified digital illustration of megakaryocyte cell.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Digital artwork of Gram-positive anaerobic Bifidobacterium bacteria. — Stock Photo
    Digital artwork of Gram-positive anaerobic Bifidobacterium bacteria.
    Group of flagella cholera bacteria, digital illustration. — Stock Photo
    Group of flagella cholera bacteria, digital illustration.
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans. — Stock Photo
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans.
    Dividing prostate gland cancer cells, colored scanning electron micrograph. — Stock Photo
    Dividing prostate gland cancer cells, colored scanning electron micrograph.
    In vitro fertilisation process — Stock Photo
    In vitro fertilisation process
    Lychnocanoma radiolarian shell — Stock Photo
    Lychnocanoma radiolarian shell
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration — Stock Photo
    Streptococcus pneumoniae bacteria (pneumococci), computer illustration
    Conceptual illustration of association of Bacteroides massiliensis bacteria in intestine with prostate cancer development. — Stock Photo
    Conceptual illustration of association of Bacteroides massiliensis bacteria in intestine with prostate cancer development.
    Magnified digital illustration of implanted blastocyst cell. — Stock Photo
    Magnified digital illustration of implanted blastocyst cell.
    Illustration of fertilized human egg cell. — Stock Photo
    Illustration of fertilized human egg cell.
    Magnified digital illustration of blastocyst cell. — Stock Photo
    Magnified digital illustration of blastocyst cell.
    Light micrograph of a colon biopsy from a colonoscopy. The pathology report describes normal colonic mucosa fragment with colic glands. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of a colon biopsy from a colonoscopy. The pathology report describes normal colonic mucosa fragment with colic glands. Haematoxylin and eosin stain.
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria. — Stock Photo
    Digital artwork of Clostridium perfringens Gram-positive rod-shaped bacteria.
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    3d rendered abstract illustration of blue nerve cell. — Stock Photo
    3d rendered abstract illustration of blue nerve cell.
    Digital 3d colored illustration of cancer cell in process of mitosis. — Stock Photo
    Digital 3d colored illustration of cancer cell in process of mitosis.
    Illustration of malaria infected blood cells. — Stock Photo
    Illustration of malaria infected blood cells.
    Close-up 3D illustration of X chromosome on white background. — Stock Photo
    Close-up 3D illustration of X chromosome on white background.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Helicobacter pylori bacteria — Stock Photo
    Helicobacter pylori bacteria
    Conceptual digital illustration showing Giardia intestinalis parasites in drop of water from dirty tap. — Stock Photo
    Conceptual digital illustration showing Giardia intestinalis parasites in drop of water from dirty tap.
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Scanning electron micrograph of bacteria cultured from sample of human faeces. — Stock Photo
    Scanning electron micrograph of bacteria cultured from sample of human faeces.
    Listeria monocytogenes bacteria, computer illustration. L. monocytogenes is the causative agent of the human disease listeriosis — Stock Photo
    Listeria monocytogenes bacteria, computer illustration. L. monocytogenes is the causative agent of the human disease listeriosis
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Panoramic illustration of blood vessel with eosinophilia with numerous eosinophils white blood cells, anti-parasite immune system. — Stock Photo
    Panoramic illustration of blood vessel with eosinophilia with numerous eosinophils white blood cells, anti-parasite immune system.
    Destruction of a human embryo — Stock Photo
    Destruction of a human embryo
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Digital illustration of human digestive system and microscopic images of bacteria. — Stock Photo
    Digital illustration of human digestive system and microscopic images of bacteria.
    Adult scabies mite — Stock Photo
    Adult scabies mite
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    Conceptual digital illustration showing Pentatrichomonas hominis parasites in drop of water from dirty tap. — Stock Photo
    Conceptual digital illustration showing Pentatrichomonas hominis parasites in drop of water from dirty tap.
    Gram-positive Peptostreptococcus bacteria, digital illustration. — Stock Photo
    Gram-positive Peptostreptococcus bacteria, digital illustration.
    Medical illustration of human cell structure on black background. — Stock Photo
    Medical illustration of human cell structure on black background.
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Illustration of sperm fertilizing human egg cell. — Stock Photo
    Illustration of sperm fertilizing human egg cell.
    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter — Stock Photo
    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter
    Digital illustration of Acanthamoeba castellanii amoebas on white background. — Stock Photo
    Digital illustration of Acanthamoeba castellanii amoebas on white background.
    Illustration of 8 cell stage egg on blue background. — Stock Photo
    Illustration of 8 cell stage egg on blue background.
    Human cell, computer illustration. — Stock Photo
    Human cell, computer illustration.
    Toilet microbes on contaminated seat surface, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface, conceptual digital illustration.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Abstract yellow colored cancer cell on black background, digital illustration. — Stock Photo
    Abstract yellow colored cancer cell on black background, digital illustration.
    Probiotic bacteria in normal intestinal microbiota, digital illustration. — Stock Photo
    Probiotic bacteria in normal intestinal microbiota, digital illustration.
    Pathogenic Listeria bacteria — Stock Photo
    Pathogenic Listeria bacteria
    Illustration of human blood cells on black background. — Stock Photo
    Illustration of human blood cells on black background.
    Magnified digital illustration of dendritic cell. — Stock Photo
    Magnified digital illustration of dendritic cell.
    Digital illustration of human nerve cell with dendrites. — Stock Photo
    Digital illustration of human nerve cell with dendrites.
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar. — Stock Photo
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar.
    Immunodeficiency virus infection in blood stream — Stock Photo
    Immunodeficiency virus infection in blood stream
    Viruses and bacteria, abstract digital illustration. — Stock Photo
    Viruses and bacteria, abstract digital illustration.