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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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The dermatophytes are molds that can invade the stratum corneum of the skin or other keratinized tissues derived from epidermis, such as hair and nails. They may cause infections (dermatophytoses) at most skin sites, although the feet, groin, scalp, and nails are most commonly affected. 1 The dermatophytes are among the earliest microorganisms that were found to cause infections in humans.
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Fungi are types of parasitic plants that include molds, mildew, and yeast. A fungal infection is an inflammatory condition in which fungi multiply and invade the skin, the digestive tract, the genitals, and other body tissues, particularly, the lu...
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Detailed information on fungal skin infections, including Candidiasis, Tinea Infections, and Tinea Versicolor
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Fungal infections of the skin are among today''s most common infectious diseases, and they occur worldwide. Superficial fungus infections fall into three broad categories: the dermatophytes(ringworm), tinea versicolor, and cutaneous candidiasis(yea...
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Detailed information on fungal infections of the skin, including candidiasis (yeast infection), tinea infection (ringworm), and tinea versicolor
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Vitamin A deficiency exists when the chronic failure to eat sufficient amounts of vitamin A or beta-carotene results in levels of blood-serum vitamin A that are below a defined range. Beta-carotene is a form of pre-vitamin A, which is readily conv...
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Corneal injury describes an injury to the cornea, the crystal clear(transparent) tissue covering the front of the eye.The cornea works with the lens of the eye to focus images on the retina. Injuries to the cornea are common.Superficial(surface) c...
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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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Contact lenses are small, light-weight plastic devices worn on the eye that correct refractive errors in vision. While they appear to be worn in direct contact with the cornea, they actually float on a layer of tears that separates them from the c...
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Eyeglasses and contact lenses are devices that correct refractive errors in vision. Eyeglass lenses are mounted in frames that are worn on the face, sitting mostly on the ears and nose, so that the lenses are positioned in front of the eyes.
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Originally contact lenses were made of glass, then later of hard plastic, and still later of flexible, highly oxygen-permeable soft plastic. Today, the majority of lenses worn are of two basic types: rigid gas permeable(so-called"hard" lenses) and...
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Eyeglasses and contact lenses are devices that correct refractive errors in vision. Eyeglass lenses are mounted in frames worn on the face, sitting mostly on the ears and nose, so that the lenses are positioned in front of the eyes.
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If you wear contact lenses, it's important to follow your eye care provider's instructions on wearing and disinfecting them.
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Infants and children with serious vision problems often can be helped to see well with contact lenses.
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Examine the eye in a well-lighted area. To find the object, look up and down, then from side to side.
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Detailed information on foreign bodies in the eye, including symptoms, diagnosis, and treatment
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Detailed information on foreign bodies in the ear, nose, and airway Foreign bodies in the ear, nose, and breathing tract (airway) sometimes occur in children. Foreign bodies refer to any object that is placed in the ear, nose, or mouth that is not meant to be there and could cause harm without immediate medical attention.
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Fight the impulse to rub furiously until the dust or dirt is gone. You might scratch your cornea or otherwise damage your eye.
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