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    Abstract illustration of Moraxella catarrhalis cocci bacteria. — Stock Photo
    Abstract illustration of Moraxella catarrhalis cocci bacteria.
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Illustration of female silhouette with highlighted rectum. — Stock Photo
    Illustration of female silhouette with highlighted rectum.
    Digital illustration of anaerobic saccharolytic Bacteroides bacteria. — Stock Photo
    Digital illustration of anaerobic saccharolytic Bacteroides bacteria.
    Transparent male silhouette with visible ureter, computer illustration. — Stock Photo
    Transparent male silhouette with visible ureter, computer illustration.
    Colored lungs in transparent female body on black background, computer illustration. — Stock Photo
    Colored lungs in transparent female body on black background, computer illustration.
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Digital illustration of transparent elderly man body with visible orange-colored kidneys. — Stock Photo
    Digital illustration of transparent elderly man body with visible orange-colored kidneys.
    Healthy digestive system — Stock Photo
    Healthy digestive system
    Orange colored bladder in male body silhouette, computer illustration. — Stock Photo
    Orange colored bladder in male body silhouette, computer illustration.
    Illustration of senior man silhouette with visible colon. — Stock Photo
    Illustration of senior man silhouette with visible colon.
    Lung cancer in female transparent body, conceptual computer illustration. — Stock Photo
    Lung cancer in female transparent body, conceptual computer illustration.
    Orange colored bladder in male body silhouette, computer illustration. — Stock Photo
    Orange colored bladder in male body silhouette, computer illustration.
    Male body with diseased colon, computer illustration. — Stock Photo
    Male body with diseased colon, computer illustration.
    Male body with diseased colon, computer illustration. — Stock Photo
    Male body with diseased colon, computer illustration.
    Bacterial cystitis, illustration. Cystitis (inflammation of the bladder) can be caused by the bacterium E. coli (red). — Stock Photo
    Bacterial cystitis, illustration. Cystitis (inflammation of the bladder) can be caused by the bacterium E. coli (red).
    Digital artwork of Streptococcus pneumoniae bacteria inside alveoli of lung causing pneumonia. — Stock Photo
    Digital artwork of Streptococcus pneumoniae bacteria inside alveoli of lung causing pneumonia.
    3d illustration of Salmonella sp. bacteria showing internal structure — Stock Photo
    3d illustration of Salmonella sp. bacteria showing internal structure
    Digital illustration of transparent elderly man body with visible orange-colored bladder. — Stock Photo
    Digital illustration of transparent elderly man body with visible orange-colored bladder.
    Suburban community in San Mateo County, California, USA — Stock Photo
    Suburban community in San Mateo County, California, USA
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants — Stock Photo
    Whooping cough bacterium (Bordetella pertussis), illustration. These rod-shaped Gram-negative bacilli cause whooping cough, known as pertussis, mainly in infants
    Lungs in anatomy of male body, computer illustration. — Stock Photo
    Lungs in anatomy of male body, computer illustration.
    Transparent male silhouette with visible large intestine, computer illustration. — Stock Photo
    Transparent male silhouette with visible large intestine, computer illustration.
    Bladder in abstract female body on blue background, computer illustration. — Stock Photo
    Bladder in abstract female body on blue background, computer illustration.
    3d anatomical model demonstrating female anatomy in rear view, computer illustration. — Stock Photo
    3d anatomical model demonstrating female anatomy in rear view, computer illustration.
    Digital illustration of capsid of polyoma BK virus. — Stock Photo
    Digital illustration of capsid of polyoma BK virus.
    Female abdominal organs, computer illustration. — Stock Photo
    Female abdominal organs, computer illustration.
    Medical illustration of the liver and stomach — Stock Photo
    Medical illustration of the liver and stomach
    Red colored lungs in female body silhouette on blue background, digital illustration. — Stock Photo
    Red colored lungs in female body silhouette on blue background, digital illustration.
    Illustration of blue silhouette of obese woman with highlighted colon on white background. — Stock Photo
    Illustration of blue silhouette of obese woman with highlighted colon on white background.
    Lungs in anatomy of male body, computer illustration. — Stock Photo
    Lungs in anatomy of male body, computer illustration.
    3d rendered illustration of colored female colon in body silhouette. — Stock Photo
    3d rendered illustration of colored female colon in body silhouette.
    Illustration of cancerous tumour in female lung. — Stock Photo
    Illustration of cancerous tumour in female lung.
    Human body model showing female anatomy with internal organs, digital 3d render illustration. — Stock Photo
    Human body model showing female anatomy with internal organs, digital 3d render illustration.
    Illustration of transparent blue silhouette of male body with colored bronchi. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored bronchi.
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia. — Stock Photo
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia.
    Illustration of figure of obese man with visible lungs. — Stock Photo
    Illustration of figure of obese man with visible lungs.
    Digital illustration of capsids of polyoma BK virus. — Stock Photo
    Digital illustration of capsids of polyoma BK virus.
    Medical illustration of the human digestive system — Stock Photo
    Medical illustration of the human digestive system
    3d rendered illustration of colored female colon in body silhouette. — Stock Photo
    3d rendered illustration of colored female colon in body silhouette.
    Diseased bladder in abstract human body, conceptual digital illustration. — Stock Photo
    Diseased bladder in abstract human body, conceptual digital illustration.
    Digital illustration of digestive system suffering from irritable bowel syndrome. — Stock Photo
    Digital illustration of digestive system suffering from irritable bowel syndrome.
    Medical illustration depicting the different stages of colon cancer — Stock Photo
    Medical illustration depicting the different stages of colon cancer
    Microbiota of human intestine, abstract digital 3d illustration. — Stock Photo
    Microbiota of human intestine, abstract digital 3d illustration.
    Digital illustration of colon in senior man body. — Stock Photo
    Digital illustration of colon in senior man body.
    Colorful rhinovirus particles in 360-degree panorama view, digital illustration. — Stock Photo
    Colorful rhinovirus particles in 360-degree panorama view, digital illustration.
    Illustration of colon in transparent male silhouette. — Stock Photo
    Illustration of colon in transparent male silhouette.
    Bacterial sinusitis, computer illustration. The sinuses are membrane-lined air-filled spaces in the bones of the face. The frontal sinuses are above the eyes. Below these are the many lobed ethmoid sinuses and behind them the sphenoid sinuses — Stock Photo
    Bacterial sinusitis, computer illustration. The sinuses are membrane-lined air-filled spaces in the bones of the face. The frontal sinuses are above the eyes. Below these are the many lobed ethmoid sinuses and behind them the sphenoid sinuses
    Human digestive system on white background, digital illustration. — Stock Photo
    Human digestive system on white background, digital illustration.
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.
    Medical illustration of the human digestive system including oral cavity, esophagus, liver, stomach, large and small intestines — Stock Photo
    Medical illustration of the human digestive system including oral cavity, esophagus, liver, stomach, large and small intestines
    Healthy intestinal villi — Stock Photo
    Healthy intestinal villi
    Medical illustration of inflamed intestinal villi. — Stock Photo
    Medical illustration of inflamed intestinal villi.
    Abstract male figure showing colored ureter, computer illustration. — Stock Photo
    Abstract male figure showing colored ureter, computer illustration.
    3d rendered illustration of colored female bronchi in body silhouette. — Stock Photo
    3d rendered illustration of colored female bronchi in body silhouette.
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Malignant tumor in the colon — Stock Photo
    Malignant tumor in the colon
    Female abdominal organs, midsection, digital illustration. — Stock Photo
    Female abdominal organs, midsection, digital illustration.
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    Enterobius vermicularis threadworm eggs containing worm larvae, causative agent of enterobiasis, computer illustration. — Stock Photo
    Enterobius vermicularis threadworm eggs containing worm larvae, causative agent of enterobiasis, computer illustration.