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    Microscopic colored view of a unipolar neuron — Stock Photo
    Microscopic colored view of a unipolar neuron
    Conceptual image of a neurons with lightened axon — Stock Photo
    Conceptual image of a neurons with lightened axon
    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.
    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.
    Rat bite fever bacteria, computer illustration — Stock Photo
    Rat bite fever bacteria, computer illustration
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Conceptual image of plasmodium causing malaria — Stock Photo
    Conceptual image of plasmodium causing malaria
    Cryptococcus gattii fungus, computer illustration. — Stock Photo
    Cryptococcus gattii fungus, computer illustration.
    Adeno-associated viruses, computer illustration. — Stock Photo
    Adeno-associated viruses, computer illustration.
    Aggregatibacter aphrophilus bacteria, computer illustration. — Stock Photo
    Aggregatibacter aphrophilus bacteria, computer illustration.
    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).
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell (test) of a Globigerina sp. planktonic foraminiferan.
    Blastomyces dermatitidis fungus, computer illustration. — Stock Photo
    Blastomyces dermatitidis fungus, computer illustration.
    Microscopic view of Rickettsia bacterias on black background — Stock Photo
    Microscopic view of Rickettsia bacterias on black background
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Conceptual image of polyomavirus cells — Stock Photo
    Conceptual image of polyomavirus cells
    Mycobacterium chimaera bacteria, computer illustration. — Stock Photo
    Mycobacterium chimaera bacteria, computer 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.
    Conceptual image of coxsackievirus cells — Stock Photo
    Conceptual image of coxsackievirus cells
    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.
    Conceptual image of polyomavirus cells — Stock Photo
    Conceptual image of polyomavirus cells
    Conceptual image of coxsackievirus cells — Stock Photo
    Conceptual image of coxsackievirus cells
    Microscopic view of pancreatic cancer cell — Stock Photo
    Microscopic view of pancreatic cancer cell
    Hepatic bile duct infected with cocidian protozoa — Stock Photo
    Hepatic bile duct infected with cocidian protozoa
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.
    Conceptual image of polyomavirus cells — Stock Photo
    Conceptual image of polyomavirus cells
    Light micrograph of a section through a lymph node affected by Hodgkin's lymphoma. — Stock Photo
    Light micrograph of a section through a lymph node affected by Hodgkin's lymphoma.
    Swine influenza virus microscopic view — Stock Photo
    Swine influenza virus microscopic view
    Conceptual image of coxsackievirus cells — Stock Photo
    Conceptual image of coxsackievirus cells
    Hepatic bile duct infected with cocidian protozoa — Stock Photo
    Hepatic bile duct infected with cocidian protozoa
    Illustration of the capsid of an HK97 bacteriophage. — Stock Photo
    Illustration of the capsid of an HK97 bacteriophage.
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Blastomyces dermatitidis fungus, computer illustration. — Stock Photo
    Blastomyces dermatitidis fungus, computer illustration.
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Balamuthia mandrillaris amoeba, computer illustration. — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration.
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Balamuthia mandrillaris amoeba, computer illustration. — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration.
    Coloured transmission electron micrograph (TEM) of a section through a Langerhans cell from the epidermis of the skin. — Stock Photo
    Coloured transmission electron micrograph (TEM) of a section through a Langerhans cell from the epidermis of the skin.
    Conceptual image of a neuron on black background — Stock Photo
    Conceptual image of a neuron on black background
    Computer illustration of a dengue virus particle. — Stock Photo
    Computer illustration of a dengue virus particle.
    Pathophysiology of diabetic foot ulcers — Stock Photo
    Pathophysiology of diabetic foot ulcers
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Conceptual image of polyomavirus cells — Stock Photo
    Conceptual image of polyomavirus cells
    Lactobacillus crispatus bacteria, illustration — Stock Photo
    Lactobacillus crispatus bacteria, illustration
    Conceptual image of coxsackievirus cells — Stock Photo
    Conceptual image of coxsackievirus cells
    Balamuthia mandrillaris amoeba, computer illustration. — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration.
    Cryptococcus gattii fungus, computer illustration. — Stock Photo
    Cryptococcus gattii fungus, computer illustration.
    Conceptual image of plasmodium causing malaria — Stock Photo
    Conceptual image of plasmodium causing malaria
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    Microscopic cross section view of HIV virus — Stock Photo
    Microscopic cross section view of HIV virus
    Paramecium sp. ciliate protozoa — Stock Photo
    Paramecium sp. ciliate protozoa
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Lactobacillus crispatus bacteria, illustration — Stock Photo
    Lactobacillus crispatus bacteria, illustration
    Hepatitis B virus particle — Stock Photo
    Hepatitis B virus particle
    Multicellular organism visualization — Stock Photo
    Multicellular organism visualization
    Colony of Listeria sp. bacteria — Stock Photo
    Colony of Listeria sp. bacteria
    Colony of escherichia coli bacteria — Stock Photo
    Colony of escherichia coli bacteria
    Clostridium difficile bacteria — Stock Photo
    Clostridium difficile bacteria
    Bacilli bacteria in the intestine — Stock Photo
    Bacilli bacteria in the intestine
    Methicillin-resistant Staphylococcus aureus bacteria — Stock Photo
    Methicillin-resistant Staphylococcus aureus bacteria