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| Description: Many different microorganisms can be human pathogens. (a) Human immunodeficiency virus (HIV), the cause of AIDS. (b) Influenza virus. (c) Staphylococcus aureus, a bacterium that colonizes human skin, is the common cause of pimples and boils, and can also cause food poisoning. (d) Streptococcus pneumoniae, is the major cause of pneumonia and is also a common cause of meningitis in children and the elderly. (e) Salmonella enteritidis, the bacterium that commonly causes food poisoning. (f) Mycobacterium tuberculosis, the bacterium that causes tuberculosis. (g) A human cell (colored green) containing Listeria monocytogenes (colored yellow), a bacterium that can contaminate processed food, causing disease (listeriosis) in pregnant women and immunosuppressed individuals. (h) Pneumocystis carinii, an opportunistic fungus that infects patients with acquired immunodeficiency syndrome (AIDS) and other immunosuppressed individuals. The fungal cells (colored green) are in lung tissue. (i) Epidermophyton floccosum, the fungus that causes ringworm. (j) The fungus Candida albicans, a normal inhabitant of the human body that occasionally causes thrush and more severe systemic infections. (k) Red blood cells and Trypanosoma brucei (colored orange), a protozoan that causes African sleeping sickness. (l) Schistosoma mansoni, the helminth worm that causes schistosomiasis. The adult intestinal blood fluke forms are shown: the male is thick and bluish, the female thin and white. All the photos are false-colored electron micrographs, with the exception of (l), which is a light micrograph. Picture Stats: Views: 459 Filesize: 226.65kB Height: 563 Width: 434 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=22693 |