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Malignant otitis externa is caused by the spread of infection from an outer ear infection (otitis externa, also called swimmer's ear. Malignant otitis externa is an uncommon complication of both acute swimmer's ear and chronic swimmer's ear. Perso...
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Bacteria are prokaryotes (unicellular organisms with no membrane-enclosed nucleus) with simple structures that typically range in size from about 0.5 to 20 micrometers.
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The bacterium Heliobacter pylori is the only one that can survive inside the human stomach. It causes gastritis and ulcers, but is generally treatable with a combination of antibiotics.
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