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J Infect Dis. 2010 Nov 15;202(10):1486-91. doi: 10.1086/656773. Epub 2010 Oct 7.

A 2009 varicella outbreak in a Connecticut residential facility for adults with intellectual disability.

Author information

1
National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. JLeung@cdc.gov

Abstract

We investigated a varicella outbreak in a residential facility for adults with intellectual disabilities. A case of varicella was defined as a generalized maculopapular rash that developed in a facility resident or employee. Immunoglobulin M testing was conducted on serologic samples, and polymerase chain reaction testing was performed on environmental and skin lesion samples. Eleven cases were identified among 70 residents and 2 among ∼145 staff. An unrecognized case of herpes zoster was the likely source. Case patients first entered any residential facility at a younger age than non-case residents (9.5 vs 15.0 years; P < .01). Varicella zoster virus DNA was detected 2 months after the outbreak in environmental samples obtained from case patients' residences. This outbreak exemplifies the potential for at-risk pockets of varicella-susceptible adults, especially among those who have lived in residential facilities from a young age. Evidence of immunity should be verified for all adults and healthcare staff in similar residential settings.

PMID:
20929354
DOI:
10.1086/656773
[Indexed for MEDLINE]

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