Infection – Definition and Symptoms

What is Infection – Definition Infection – The invasion of the body by a PATHOGEN (microorganism capable of causing disease), sometimes called an infectious agent, that enters cells and attempts to reproduce or replicate itself. The pathogen may be a bacterium, FUNGUS (yeast or mold), VIRUS, PARASITE, or prion. Not all infections cause symptoms or illness, and some infections may be […]

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Amebiasis treatment and symptoms

Amebiasis Definition Amebiasis is a parasitic INFECTION of the gastrointestinal tract. The PARASITE responsible is Entamoeba histolytica, a single-cell organism (an ameba) that enters the body by drinking water or eating food that contains E. histolytica in cyst form. The cyst is a protective encasing within which the ameba may sustain itself in a dormant stage for weeks to […]

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Malaria – symptoms and treatment

Malaria Definition Malaria – An illness that results from INFECTION with one of four Plasmodium parasites: Plasmodium malariae, P. ovale, P. vivax, and P. falciparum. Bites from the female Anopheles mosquito spread the infection from one person to another. Though malaria has not occurred naturally in the United States since the 1950s, travel to or immigration from regions […]

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Babesiosis disease Babesia microti and symptoms

Babesiosis Definition An illness that results from INFECTION with the parasitic protozoan Babesia microti. Most people who have babesiosis do not have symptoms; the infection causes illness primarily in people who are IMMUNOCOMPROMISED or who have had SPLENECTOMY (surgical removal of the SPLEEN). The bite of the Ixodes tick, found in the northeastern United States, is the mode of […]

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Meningitis (viral infection) – symptoms and treatment

Meningitis Definition INFLAMMATION of the MENINGES, the membranes that surround the BRAIN and SPINAL CORD. Meningitis may result from bacterial, viral, or fungal INFECTION. Viruses are the most common causes of meningitis and can be highly contagious. Enteroviruses and Haemophilus influenzae type B (Hib) VIRUS are the common viral causes, though many viruses can cause meningitis. Bacterial meningitis may be […]

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Carrier and bacterial or viral infection

Carrier Definition Carrier is a person who has a bacterial or viral INFECTION but does not show symptoms or become ill because of the infection and yet can pass the infection on to other people. A third of people who have infectious HEPATITIS are carriers, for example. In some circumstances treating the infection eliminates it so the […]

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Microbe

Microbe Definition Microbe – a living organism, also called a microorganism, that is too small to see with the unaided EYE. Most microbes are single-cell or simple multiple cell organisms. Common microbes include BACTERIA, fungi (yeasts and molds), viruses, PROTOZOA, and algae. Microbes are abundant in the natural environment as well as the environment of the […]

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Paronychia Infection – Acute / Chronic – Information

Definition of Paronychia Paronychia is INFLAMMATION and INFECTION of the SKIN that surrounds the NAILS. It commonly occurs in people who bite their fingernails or the skin around them or who have frequent cuts around their fingernails. Paronychia is common in children who suck their thumbs or fingers. Paronychia of a toenail may accompany an ingrown toenail. Splinters, INSECT BITES AND STINGS, and other […]

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Normal flora – Nose, Mouth, Skin and Vagina

Normal Flora Definition The BACTERIA, fungi, and other microorganisms naturally present within the environment of the healthy body. Normal flora exist on the surface of the skin, within natural cavities such as the nose and mouth, in the gastrointestinal tract, and in the reproductive tract. These beneficial microbes participate in the body’s IMMUNE RESPONSE, digestive functions, […]

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Pediculosis – Pubis, Capitis, Corporis – Definition

Definition of Pediculosis Pediculosis – Infestation with lice, parasites that live on the SKIN and feed by sucking BLOOD through small punctures they make through the skin. Lice attach their eggs, called nits, to HAIR shafts. Of the numerous species of lice, three afflict humans: Pediculus humanus capitis, which infests the scalp Pediculus humanus corporis, which infests the body Pediculus pubis, which infests […]

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