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    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.
    Close-up of flesh fly covered by dew drops at top of wild plant stem. — Stock Photo
    Close-up of flesh fly covered by dew drops at top of wild plant stem.
    Close-up of grass moth sitting on grass spike. — Stock Photo
    Close-up of grass moth sitting on grass spike.
    Babesia parasites inside red blood cell, computer illustration — Stock Photo
    Babesia parasites inside red blood cell, computer illustration
    Snouted treefrog (Scinax fuscovarius). This species is widespread in southern, south-eastern and central Brazil as well as in eastern Bolivia, Paraguay, northern Argentina, and northern Uruguay — Stock Photo
    Snouted treefrog (Scinax fuscovarius). This species is widespread in southern, south-eastern and central Brazil as well as in eastern Bolivia, Paraguay, northern Argentina, and northern Uruguay
    Horse skeleton model with detailed Splenius muscle, digital illustration. — Stock Photo
    Horse skeleton model with detailed Splenius muscle, digital illustration.
    Illustration of giardia parasite on blue background. — Stock Photo
    Illustration of giardia parasite on blue background.
    Digital illustration of parasitic Ancylostoma duodenale hookworms. — Stock Photo
    Digital illustration of parasitic Ancylostoma duodenale hookworms.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    Close-up of marmalade hoverfly perched on plant branch. — Stock Photo
    Close-up of marmalade hoverfly perched on plant branch.
    Dust mite on skin surface — Stock Photo
    Dust mite on skin surface
    Praying mantis head — Stock Photo
    Praying mantis head
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Digital illustration of multiple threadworms in human intestine. — Stock Photo
    Digital illustration of multiple threadworms in human intestine.
    Horse skeleton, realistic 3d rendering. — Stock Photo
    Horse skeleton, realistic 3d rendering.
    Dog silhouette with red colored spine on black background, digital illustration. — Stock Photo
    Dog silhouette with red colored spine on black background, digital illustration.
    Digital illustration of nit egg of human head louse attached to human hair. — Stock Photo
    Digital illustration of nit egg of human head louse attached to human hair.
    Grivet monkeys sitting on tree trunk — Stock Photo
    Grivet monkeys sitting on tree trunk
    Close-up of orb weaver spider on green leaf. — Stock Photo
    Close-up of orb weaver spider on green leaf.
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Digital illustration of parasitic hookworms Ancylostoma duodenale. — Stock Photo
    Digital illustration of parasitic hookworms Ancylostoma duodenale.
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    Green colored dust mite, digital illustration. — Stock Photo
    Green colored dust mite, digital illustration.
    Close-up of small copper butterfly covered by dew drops on wild plant. — Stock Photo
    Close-up of small copper butterfly covered by dew drops on wild plant.
    Baboons taking care of each other and combing fur on the nature — Stock Photo
    Baboons taking care of each other and combing fur on the nature
    Close-up of gossamer winged butterfly larva on wild plant. — Stock Photo
    Close-up of gossamer winged butterfly larva on wild plant.
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Dog silhouette with red colored bladder on black background, digital illustration. — Stock Photo
    Dog silhouette with red colored bladder on black background, digital illustration.
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration.
    House dust mites — Stock Photo
    House dust mites
    Tiger fly at top of dried wild plant. — Stock Photo
    Tiger fly at top of dried wild plant.
    Fly larva head anatomy — Stock Photo
    Fly larva head anatomy
    Coloured scanning electron micrograph of tardigrade water bear. — Stock Photo
    Coloured scanning electron micrograph of tardigrade water bear.
    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
    Structure of dog nervous system, computer illustration. — Stock Photo
    Structure of dog nervous system, computer illustration.
    Adult Locust on white background — Stock Photo
    Adult Locust on white background
    Close-up of ladybug larva in pupa stage on stem. — Stock Photo
    Close-up of ladybug larva in pupa stage on stem.
    Two small snails on pink flowers in water with falling droplets and mirrored image. — Stock Photo
    Two small snails on pink flowers in water with falling droplets and mirrored image.
    Anatomy of dog spleen, zoological digital illustration. — Stock Photo
    Anatomy of dog spleen, zoological digital illustration.
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Digital illustration of intestinal parasitic tapeworm with suckers. — Stock Photo
    Digital illustration of intestinal parasitic tapeworm with suckers.
    Frog crab (Ranina ranina), X-ray. — Stock Photo
    Frog crab (Ranina ranina), X-ray.
    Dog silhouette with red colored kidneys on black background, digital illustration. — Stock Photo
    Dog silhouette with red colored kidneys on black background, digital illustration.
    Horse anatomy and skeletal system, computer illustration. — Stock Photo
    Horse anatomy and skeletal system, computer illustration.
    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.
    Echinococcosis multilocularis hydatid cyst, computer illustration — Stock Photo
    Echinococcosis multilocularis hydatid cyst, computer illustration
    Seagull birds in flight with outstretched wings over sea. — Stock Photo
    Seagull birds in flight with outstretched wings over sea.
    Yellow French grunt fish swimming in water, close-up. — Stock Photo
    Yellow French grunt fish swimming in water, close-up.
    Close-up of hummingbird hawkmoth on yellow lichens covered branch. — Stock Photo
    Close-up of hummingbird hawkmoth on yellow lichens covered branch.
    Horse anatomy with visible internal organs, computer illustration. — Stock Photo
    Horse anatomy with visible internal organs, computer illustration.
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Horse skeleton in transparent silhouette on black background, computer illustration. — Stock Photo
    Horse skeleton in transparent silhouette on black background, computer illustration.
    Egg of Enterobius vermicularis threadworm containing worm larva, causative agent of enterobiasis, computer illustration. — Stock Photo
    Egg of Enterobius vermicularis threadworm containing worm larva, causative agent of enterobiasis, computer illustration.
    Close-up of sawfly sitting on wild plant stem. — Stock Photo
    Close-up of sawfly sitting on wild plant stem.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Close-up of bumble bee scarab beetle sleeping on wildflower. — Stock Photo
    Close-up of bumble bee scarab beetle sleeping on wildflower.
    Horse skeleton in transparent silhouette on black background, computer illustration. — Stock Photo
    Horse skeleton in transparent silhouette on black background, computer illustration.
    Mosquito feeding on human blood, digital illustration. — Stock Photo
    Mosquito feeding on human blood, digital illustration.
    Selective focus of Fly head, macrophotograph. — Stock Photo
    Selective focus of Fly head, macrophotograph.