Prevalence and Incidence of Ocular Herpes
Prevalance of Ocular Herpes:
400,000 Americans have had some form ... see also overview of Ocular Herpes.
Prevalance Rate:
approx 1 in 679 or 0.15% or 400,000 people in USA [Source statistic for calcuation: "400,000 Americans have had some form" -- see also general information about data sources]
Ocular Herpes: Rare Disease
Ocular Herpes is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Ocular Herpes, or a subtype of Ocular Herpes,
affects less than 200,000 people in the US population.
Ocular Herpes Prevalence: Book Excerpts
Incidence (annual) of Ocular Herpes:
50,000 new/recurrent cases per year, 25% have stromal keratitis ... see also overview of Ocular Herpes.
Incidence Rate:
approx 1 in 5,439 or 0.02% or 50,000 people in USA [Source statistic for calcuation: "50,000 new/recurrent cases per year, 25% have stromal keratitis" -- see also general information about data sources]
Incidence extrapolations for USA for Ocular Herpes:
50,000 per year,
4,166 per month,
961 per week,
136 per day,
5 per hour,
0 per minute,
0 per second.
[Source statistic for calculation: "50,000 new/recurrent cases per year, 25% have stromal keratitis" -- see also general information about data sources]
Prevalance of Ocular Herpes:
An estimated 400,000 Americans have had
some form of ocular herpes. (Source: excerpt from Facts About the Cornea and Corneal Disease: NEI)
Incidence of Ocular Herpes:
Each year, nearly 50,000 new and
recurring cases are diagnosed in the United States, with the more
serious stromal keratitis accounting for about 25 percent. (Source: excerpt from Facts About the Cornea and Corneal Disease: NEI)
Prevalence/Incidence of Ocular Herpes: 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 Ocular Herpes.
Genital herpes:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Genital herpes is usually caused by infection with herpes simplex virus Type 2, but some studies report increasing incidence of infection with herpes simplex virus Type 1. This disease is typically transmitted through sexual intercourse, orogenital sexual activity, kissing, and hand-to-body contact. Pregnant women may transmit the infection to neonates during vaginal delivery if an active infection is present. Such transmitted infection may be localized (for instance, in the eyes) or disseminated and may be associated with central nervous system involvement.
An estimated 86 million people worldwide are thought to have genital herpes.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Herpes simplex:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
About 85% of all HVH infections are subclinical; the others produce localized lesions and systemic reactions. After the first infection, a patient is a carrier susceptible to recurrent infections, which may be provoked by fever, menses, stress, heat, and cold. However, the patient usually has no constitutional signs and symptoms in recurrent infections.
Primary HVH is the leading cause of childhood gingivostomatitis in children ages 1 to 3. It causes the most common form of nonepidemic encephalitis and is the second most common viral infection in pregnant women. It can pass to the fetus transplacentally and, in early pregnancy, may cause spontaneous abortion or premature birth.
Herpes infection is equally common in males and females. Worldwide in distribution, it's most prevalent among children in lower socioeconomic groups who live in crowded environments. Saliva, stool, skin lesions, purulent eye exudate, and urine are potential sources of infection.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Herpes zoster:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
Herpes zoster results from reactivation of varicella virus that has lain dormant in the cerebral ganglia (extramedullary ganglia of the cranial nerves) or the ganglia of posterior nerve roots since a previous episode of chickenpox. Exactly how or why this reactivation occurs isn’t clear. Some believe that the virus multiplies as it's reactivated and that antibodies remaining from the initial infection neutralize it. However, if effective antibodies aren't present, the virus continues to multiply in the ganglia, destroy the host neuron, and spread down the sensory nerves to the skin.
Herpes zoster occurs primarily in adults, especially those older than age 50. It seldom recurs. It's also seen in patients with human immunodeficiency virus and other immunodeficiency disorders.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
About prevalence and incidence statistics:
The term 'prevalence' of Ocular Herpes usually refers to the estimated population
of people who are managing Ocular Herpes at any given time.
The term 'incidence' of Ocular Herpes refers to the annual diagnosis rate,
or the number of new cases of Ocular Herpes 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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