Infection
The invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body. An infection may cause no symptoms and be subclinical, or it may cause symptoms and be clinically apparent. An infection may remain localized, or it may spread through the blood or lymphatic vessels to become systemic (bodywide). Microorganisms that live naturally in the body are not considered infections. For example, bacteria that normally live within the mouth and intestine are not infections.
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The body’s initial reaction to infection by the HIV virus. Acute HIV infection is a flu-like syndrome that occurs immediately after a person contracts HIV (the human immunodeficiency virus 1, the agent that causes AIDS). The syndrome is characterized by fever, sore throat, headache, skin rash and swollen glands (lymphadenopathy). This syndrome precedes seroconversion — […]
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Infection with one of a group of viruses responsible for a spectrum of respiratory disease as well as infection of the stomach and intestine (gastroenteritis), eyes (conjunctivitis), and bladder (cystitis) and rash. Adenovirus respiratory diseases include a form of the common cold, pneumonia, croup, and bronchitis. Patients with compromised immune systems are especially susceptible to […]
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a bulging eardrum usually accompanied by pain; or a perforated eardrum, often with drainage of purulent material (pus). Otitis media is the most frequent diagnosis in sick children in the U.S., especially affecting infants and preschoolers. Almost all children have one or more bouts of otitis media before age 6. The eustachian tube is shorter […]
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Women with vaginal group B strep can transmit it to their infant before birth, or after the membranes are ruptured, or during the delivery. These babies have a 1/2-1% chance of contracting the early-onset type of infection. The risk of infection rises with premature infants, infants born after the amniotic membranes have ruptured for more […]