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==Overview==
==Overview==
The main purpose to screen for chickenpox is to be able to treat it early on before a clinical [[diagnosis]] can be made. The people that would need to be screened are the [[patients]] that do not currently have symptoms but are at high risk for developing [[chickenpox]].
According to [[Centers for Disease Control and Prevention|Center for Disease Control and Prevention]] ([[Centers for Disease Control and Prevention|CDC]]), there is insufficient evidence to recommend routine [[Screening (medicine)|screening]] among general population. Children are [[Vaccination|vaccinated]] against [[chickenpox]] and most [[Adult|adults]] generally may have been [[Infection (disambiguation)|infected]] with [[Varicella zoster virus|VZV]] in their early years. [[Screening (medicine)|Screening]] is recommended for specific populations which include, healthcare workers, [[pregnant]] women, [[newborns]], [[Human Immunodeficiency Virus (HIV)|HIV]]/[[HIV AIDS|AIDS]] patients and for people prior to [[organ transplantation]].


==Screening==
==Screening==
* According to [[Centers for Disease Control and Prevention|Center for Disease Control and Prevention]] ([[Centers for Disease Control and Prevention|CDC]]), there is insufficient evidence to recommend routine [[Screening (medicine)|screening]] among general population.
* Children are [[Vaccination|vaccinated]] and most adults generally may have been [[Infection (disambiguation)|infected]] with [[Varicella zoster virus|VZV]] in their early years. Hence, [[Screening (medicine)|screening]] for general population is not recommended. Testing for [[Varicella zoster virus|VZV]] or for the [[antibodies]] produced in response to [[Varicella-Zoster Virus (VZV) Infections|VZV infection]] may be performed when required.


===Tests===
=== Screening Varicella in specific populations ===
[[Blood]] tests are used to confirm [[immunity]] to the chickenpox virus. This can be done in cases in which the patient did not know he/she had been [[infected]] in the past. A positive test would show that [[antibodies]] to the chickenpox virus have developed in the blood. Another reason to screen would be if a patient had forgotten he/she had been previously immunized.
* [[Screening (medicine)|Screening]] tests are recommended for people without [[symptoms]], who are at higher risk of acquiring [[chickenpox]]. The specific groups in which screening for chickenpox is recommended include:<ref name="urlChickenpox and Shingles Tests: The Test">{{cite web |url=https://labtestsonline.org/understanding/analytes/chickenpox/tab/test/ |title=Chickenpox and Shingles Tests: The Test |format= |work= |accessdate=}}</ref>
** Healthcare workers
** Pregnant women
** Newborns
** HIV/AIDS patients
** Potential organ transplant recepients
 
* [[Blood]] tests are done to measure the levels of [[antibodies]] in the [[blood]], which indicates whether the individual has developed an [[Immunity (medical)|immunity]] to [[chickenpox]] from previous [[infection]] or a missed [[immunization]].
* Testing for [[Varicella zoster virus|VZV]] or for the [[antibodies]] produced in response to [[Varicella-Zoster Virus (VZV) Infections|VZV infection]] may be performed for [[Screening (medicine)|screening]] purposes. Also, [[Screening (medicine)|screening]] may be advised for [[newborns]], [[pregnant]] women, prior to [[organ transplantation]], and in those with [[HIV AIDS|HIV/AIDS]].
 
===Antenatal screening===
* Routine [[antenatal]] screening for evidence of [[immunity]] is recommended for [[Pregnancy|pregnant]] women.<ref name="urlPrevention of Varicella: Recommendations of the Advisory Committee on Immunization Practices (ACIP)">{{cite web |url=https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5604a1.htm |title=Prevention of Varicella: Recommendations of the Advisory Committee on Immunization Practices (ACIP) |format= |work= |accessdate=}}</ref>
 
*Routine [[antenatal]] [[Chickenpox|varicella]] [[Screening (medicine)|screening]] of all [[Pregnancy|pregnant]] women with negative or indeterminate [[varicella]] histories is not cost-effective. It could be cost-effective in groups of women with increased exposure risk.<ref name="pmid9540934">{{cite journal |vauthors=Glantz JC, Mushlin AI |title=Cost-effectiveness of routine antenatal varicella screening |journal=Obstet Gynecol |volume=91 |issue=4 |pages=519–28 |year=1998 |pmid=9540934 |doi= |url=}}</ref>
 
===Screening in Healthcare Workers===
*A study shows that 26% to 55% of healthcare workers with no history of [[chickenpox]] and who test negative for [[antibody]] against [[Chickenpox|varicella]] require [[vaccination]]. Hence, in healthcare facilities, [[varicella]] [[Screening (medicine)|screening]] and [[vaccination]] should be offered to all healthcare workers.<ref name="pmid15098642">{{cite journal |vauthors=Chong CY, Lim SH, Ng WY, Tee N, Lin RV |title=Varicella screening and vaccination for healthcare workers at KK Women's and Children's Hospital |journal=Ann. Acad. Med. Singap. |volume=33 |issue=2 |pages=243–7 |year=2004 |pmid=15098642 |doi= |url=}}</ref>


==References==
==References==
{{Reflist|2}}
{{Reflist|2}}


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Latest revision as of 20:54, 29 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Aravind Reddy Kothagadi M.B.B.S[2]

Overview

According to Center for Disease Control and Prevention (CDC), there is insufficient evidence to recommend routine screening among general population. Children are vaccinated against chickenpox and most adults generally may have been infected with VZV in their early years. Screening is recommended for specific populations which include, healthcare workers, pregnant women, newborns, HIV/AIDS patients and for people prior to organ transplantation.

Screening

Screening Varicella in specific populations

  • Screening tests are recommended for people without symptoms, who are at higher risk of acquiring chickenpox. The specific groups in which screening for chickenpox is recommended include:[1]
    • Healthcare workers
    • Pregnant women
    • Newborns
    • HIV/AIDS patients
    • Potential organ transplant recepients

Antenatal screening

Screening in Healthcare Workers

References

  1. "Chickenpox and Shingles Tests: The Test".
  2. "Prevention of Varicella: Recommendations of the Advisory Committee on Immunization Practices (ACIP)".
  3. Glantz JC, Mushlin AI (1998). "Cost-effectiveness of routine antenatal varicella screening". Obstet Gynecol. 91 (4): 519–28. PMID 9540934.
  4. Chong CY, Lim SH, Ng WY, Tee N, Lin RV (2004). "Varicella screening and vaccination for healthcare workers at KK Women's and Children's Hospital". Ann. Acad. Med. Singap. 33 (2): 243–7. PMID 15098642.


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