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The voice box (larynx) is located at the top of the airway to the lungs (trachea). The larynx contains the vocal cords.
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Laryngitis is easily recognizable. People realize they can't speak or that their voices are hoarse.
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The same viruses which cause the majority of simple upper respiratory infections(colds, etc.) are responsible for laryngitis. These include parainfluenzae virus, influenza virus, respiratory syncytial virus, rhinovirus, coronavirus, and echovirus.
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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.Bacteria are named according to the binomial(two-name) system of nomenclature fi...
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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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A virus is an infectious agent, often highly host-specific, consisting of genetic material surrounded by a protein coat.Viruses infect virtually every life form, including humans, animals, plants, fungi, and bacteria. So small that they cannot be ...
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Viruses are familiar from the common diseases they cause: colds and flu, for instance. But what are they, and how do they cause sickness?
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