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AIDS/HIV infection
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...infection AIDS/HIV infection Definition
Glossary
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Yersinia
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...infections are uncommon in the United States. Accord
HIV/AIDS
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...infection to AIDS may take several years. In the ini
Food Contamination
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...infection and 61 deaths occur in the United States e
Infant Nutrition
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...infection. An infant is born with an immature immune
Diarrhea Diet
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...infection. Some causes of diarrhea include: Taking
Digestive Diseases
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...infections. Bacterial diarrhea is most commonly caus
Breastfeeding
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...infection. Description The mother’s body pr
Diarrhea
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...infection. For example, surveillance studies in rura


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Infection

Glandular fever, or mononucleosis, is a viral infection that causes inflamed tonsils (shown here) and fever, and may cause an enlarged spleen. Symptoms most often appear in teens, but more than 80 percent of adults in the United States carry the virus and can transmit it. [Science Photo Library/Photo Researchers, Inc. Reproduced by permission.] Glandular fever, or mononucleosis, is a viral infection that causes inflamed tonsils (shown here) and fever, and may cause an enlarged spleen. Symptoms most often appear in teens, but more than 80 percent of adults in the United States carry the virus and can transmit it. [Science Photo Library/Photo Researchers, Inc. Reproduced by permission.]

An infection is an illness caused by microorganisms or bacteria that invade the body. The body's defenses against infections begin with blocking the entry of microorganisms into the system. Hand washing is an effective strategy in preventing the entry of microorganisms into the body through the skin, the respiratory system, or the GI (gastrointestinal) tract.

Local infections may produce redness, tenderness, and swelling, but systemic infections produce more serious symptoms such as fever, chills, sweats, and fatigue. Many infections will go away on their own, however, as the body's immune system can successfully fight off many infections. Others, however, require treatment, such as the use of antibiotic medications.

Catherine Christie


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