Herpes zoster history and symptoms: Difference between revisions
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Chicken pox virus can remain dormant for decades, and does so inside the [[ganglion]] of the spinal cord. As the virus is reactivated it spreads down peripheral nerve fibers and produces intense pain. The blisters therefore only affect one area of the body and do not cross the midline. They are most common on the torso, but can also appear on the face, eyes or other parts of the body. | Chicken pox virus can remain dormant for decades, and does so inside the [[ganglion]] of the spinal cord. As the virus is reactivated it spreads down peripheral nerve fibers and produces intense pain. The blisters therefore only affect one area of the body and do not cross the midline. They are most common on the torso, but can also appear on the face, eyes or other parts of the body. | ||
===Congenital varicella syndrome=== | |||
Varicella infection in pregnant women could lead to [[virus|viral]] [[transmission (medicine)|transmission]] via the placenta and infection of the fetus. If infection occurs during the first 28 weeks of [[gestation]], this can lead to fetal varicella syndrome (also known as ''congenital varicella syndrome'').<ref name="pmid17845179">{{cite journal |author=Boussault P, Boralevi F, Labbe L, Sarlangue J, Taïeb A, Leaute-Labreze C |title=Chronic varicella-zoster skin infection complicating the congenital varicella syndrome |journal=Pediatr Dermatol |volume=24 |issue=4 |pages=429–32 |year=2007 |pmid=17845179 |doi=10.1111/j.1525-1470.2007.00471.x |url=http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0736-8046&date=2007&volume=24&issue=4&spage=429}}</ref> Effects on the fetus can range in severity from underdeveloped toes and fingers to severe anal and bladder malformation. Possible problems include: | |||
* Damage to brain: [[encephalitis]],<ref>{{cite journal |author=Matsuo T, Koyama M, Matsuo N |title=Acute retinal necrosis as a novel complication of chickenpox in adults |journal=Br J Ophthalmol |volume=74 |issue=7 |pages=443–4 |year=1990 |month=July |pmid=2378860 |pmc=1042160 |doi= 10.1136/bjo.74.7.443}}</ref> [[microcephaly]], [[hydrocephaly]], [[aplasia]] of brain | |||
* Damage to the eye: [[optic stalk]], [[Optic cup (ophthalmology)|optic cup]], and lens [[vesicle (dermatology)|vesicle]]s, [[microphthalmia]], [[cataracts]], [[chorioretinitis]], [[optic atrophy]] | |||
* Other neurological disorder: damage to cervical and lumbosacral [[spinal cord]], motor/sensory deficits, absent deep [[tendon reflex]]es, [[anisocoria]]/[[Horner's syndrome]] | |||
* Damage to body: [[hypoplasia]] of upper/lower extremities, anal and bladder [[sphincter]] dysfunction | |||
* Skin disorders: ([[cicatricial]]) skin lesions, [[hypopigmentation]] | |||
Infection late in gestation or immediately following birth is referred to as "''neonatal varicella''".<ref>{{cite journal |author=Sauerbrei A, Wutzler P |title=Neonatal varicella |journal=J Perinatol |volume=21 |issue=8 |pages=545–9 |year=2001 |month=December |pmid=11774017 |doi=10.1038/sj.jp.7210599 |url=http://www.nature.com/jp/journal/v21/n8/abs/7210599a.html}}</ref> Maternal infection is associated with premature delivery. The risk of the baby developing the disease is greatest following exposure to infection in the period 7 days prior to delivery and up to 7 days following the birth. The baby may also be exposed to the virus via infectious siblings or other contacts, but this is of less concern if the mother is immune. Newborns who develop symptoms are at a high risk of [[pneumonia]] and other serious complications of the disease.<ref name="pregnancy">{{cite web | author=Royal College of Obstetricians and Gynaecologists | title=Chickenpox in Pregnancy | url=http://www.rcog.org.uk/files/rcog-corp/uploaded-files/GT13ChickenpoxinPregnancy2007.pdf |format=PDF| month=September | year=2007 | accessdate=2009-07-22}}</ref> | |||
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; L. Katie Morrison, MD; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
History and symptoms
The earliest symptoms (constituting the prodrome) of shingles include headache, sensitivity to light, fever, and malaise, all of which may be followed by itching, tingling, and pain within one to seven days. The pain may be extreme in the affected nerve, where the rash will later develop, and can be characterized as stinging, tingling, aching, numbing, or throbbing, and can be pronounced with quick stabs of intensity. During this phase, herpes zoster is frequently misdiagnosed as other diseases with similar symptoms, including heart attacks and renal colic. Some patients may have these symptoms without developing the characteristic rash. This situation, known as "zoster sine herpete," can delay diagnosis and treatment.
The initial phase is followed, in most cases, by development of the characteristic skin rashes of herpes zoster. The rash is visually similar to hives, and follow a distribution near dermatomes, commonly occurring in a stripe or belt-like pattern. The rash evolves into vesicles or small blisters filled with serous fluid. The vesicles are generally painful, and their development is often associated with the occurrence of anxiety and further flu-like symptoms, such as fever, tiredness, and generalized pain. The vesicles eventually become hemorrhagic (filled with blood), and crust over within seven to 10 days. As the crusts fall off, patients are rarely left with scarring and pigmented skin.
Shingles cannot be passed from one person to another. However, the virus that causes shingles, VZV, can be spread from a person with active shingles to a person who has no immunity to the virus by direct contact with the rash, while in the blister phase. The person exposed would then develop chicken pox, not shingles. The virus is not spread through airborne transmission, such as sneezing or coughing. Once the rash has developed crusts, the person is no longer contagious. A person is not infectious before blisters appear or with post-herpetic neuralgia (pain after the rash is gone).
Chicken pox virus can remain dormant for decades, and does so inside the ganglion of the spinal cord. As the virus is reactivated it spreads down peripheral nerve fibers and produces intense pain. The blisters therefore only affect one area of the body and do not cross the midline. They are most common on the torso, but can also appear on the face, eyes or other parts of the body.
Congenital varicella syndrome
Varicella infection in pregnant women could lead to viral transmission via the placenta and infection of the fetus. If infection occurs during the first 28 weeks of gestation, this can lead to fetal varicella syndrome (also known as congenital varicella syndrome).[1] Effects on the fetus can range in severity from underdeveloped toes and fingers to severe anal and bladder malformation. Possible problems include:
- Damage to brain: encephalitis,[2] microcephaly, hydrocephaly, aplasia of brain
- Damage to the eye: optic stalk, optic cup, and lens vesicles, microphthalmia, cataracts, chorioretinitis, optic atrophy
- Other neurological disorder: damage to cervical and lumbosacral spinal cord, motor/sensory deficits, absent deep tendon reflexes, anisocoria/Horner's syndrome
- Damage to body: hypoplasia of upper/lower extremities, anal and bladder sphincter dysfunction
- Skin disorders: (cicatricial) skin lesions, hypopigmentation
Infection late in gestation or immediately following birth is referred to as "neonatal varicella".[3] Maternal infection is associated with premature delivery. The risk of the baby developing the disease is greatest following exposure to infection in the period 7 days prior to delivery and up to 7 days following the birth. The baby may also be exposed to the virus via infectious siblings or other contacts, but this is of less concern if the mother is immune. Newborns who develop symptoms are at a high risk of pneumonia and other serious complications of the disease.[4]
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What is the chickenpox illness like?
In unvaccinated children, chickenpox most commonly causes an illness that lasts about 5-10 days. Children usually miss 5 or 6 days of school or childcare due to their chickenpox and have symptoms such as high fever, severe itching, an uncomfortable rash, and dehydration or headache. In addition, about 1 in 10 unvaccinated children who get the disease will have a complication from chickenpox serious enough to visit a health-care provider. These complications include infected skin lesions, other infections, dehydration from vomiting or diarrhea, or more serious complications such as pneumonia and encephalitis. In vaccinated children, chickenpox illness is typically mild, producing no symptoms at all other than a few red bumps. However, about 25% to 30% of vaccinated children who get the disease will develop illness as serious as unvaccinated children.
Certain groups of people are more likely to have more severe illness with serious complications. These include adults, infants, adolescents, and people whose immune systems have been weakened because of illness or medications such as long-term use of steroids.
References
- ↑ Boussault P, Boralevi F, Labbe L, Sarlangue J, Taïeb A, Leaute-Labreze C (2007). "Chronic varicella-zoster skin infection complicating the congenital varicella syndrome". Pediatr Dermatol. 24 (4): 429–32. doi:10.1111/j.1525-1470.2007.00471.x. PMID 17845179.
- ↑ Matsuo T, Koyama M, Matsuo N (1990). "Acute retinal necrosis as a novel complication of chickenpox in adults". Br J Ophthalmol. 74 (7): 443–4. doi:10.1136/bjo.74.7.443. PMC 1042160. PMID 2378860. Unknown parameter
|month=ignored (help) - ↑ Sauerbrei A, Wutzler P (2001). "Neonatal varicella". J Perinatol. 21 (8): 545–9. doi:10.1038/sj.jp.7210599. PMID 11774017. Unknown parameter
|month=ignored (help) - ↑ Royal College of Obstetricians and Gynaecologists (2007). "Chickenpox in Pregnancy" (PDF). Retrieved 2009-07-22. Unknown parameter
|month=ignored (help)