Prevalence and Incidence of Strep throat

Prevalence/Incidence of Strep throat: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Strep throat.

Acute poststreptococcal glomerulonephritis: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

APSGN results from the entrapment and collection of antigen-antibody (produced as an immunologic mechanism in response to streptococcus) in the glomerular capillary membranes, inducing inflammatory damage and impeding glomerular function. Sometimes, the immune complement further damages the glomerular membrane. The damaged and inflamed glomerulus loses the ability to be selectively permeable, and allows red blood cells (RBCs) and proteins to filter through as the glomerular filtration rate (GFR) falls. Uremic poisoning may result.

APSGN is most common in males ages 3 to 7, but it can occur at any age. Incidence is rising in the United States and Europe, with epidemics occurring in developing countries in Africa, the West Indies, and the Middle East.

Up to 95% of children and up to 70% of adults with APSGN recover fully; the rest may progress to chronic renal failure within months.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

Pharyngitis: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Pharyngitis is usually caused by a virus. The most common bacterial cause is group A beta-hemolytic streptococci. Other common causes include Mycoplasma and Chlamydia. In up to 30% of cases, no organism is identified.

Pharyngitis is widespread among adults who live or work in dusty or very dry environments, use their voices excessively, habitually use tobacco or alcohol, or suffer from chronic sinusitis, persistent coughs, or allergies.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

Throat abscesses: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Peritonsillar abscess is a complication of acute tonsillitis, usually after streptococcal or staphylococcal infection. It occurs more commonly in adolescents and young adults than in children.

Acute retropharyngeal abscess results from infection in the retropharyngeal lymph glands, which may follow an upper respiratory tract bacterial infection. Most common pathogens are beta-hemolytic Streptococcus and Staphylococcus aureus. These lymph glands begin to atrophy after age 2. Acute retropharyngeal abscess most commonly affects infants and children younger than age 2.

Chronic retropharyngeal abscess may result from tuberculosis of the cervical spine (Pott’s disease) and may occur at any age.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

About prevalence and incidence statistics:

The term 'prevalence' of Strep throat usually refers to the estimated population of people who are managing Strep throat at any given time. The term 'incidence' of Strep throat refers to the annual diagnosis rate, or the number of new cases of Strep throat diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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