630. Mumps Outbreak in a Boarding School: An Assessment of Exposure Risks and Illness Perceptions - Philadelphia, PA 2010
Session: Poster Abstract Session: Pediatric Vaccines
Friday, October 21, 2011
Room: Poster Hall B1
  • Yeshiva Mumps Outbreak Survey Poster_IDSA_2011.pdf (131.9 kB)
  • Background: From October 15–December 10, 2010 we investigated an outbreak of mumps among students at an all-male Orthodox Jewish boarding school. Thirty-nine cases of mumps were identified (18% attack rate) among students. Although 88% of the students had two doses of measles, mumps and rubella vaccine, a vaccination clinic was conducted on November 8th to help control the outbreak. At the conclusion of the outbreak, risk factors that may have influenced transmission were examined through a retrospective cohort study.    


    Methods: Cases were identified as any student with self-reported parotitis, jaw swelling, or jaw pain, with onset after October 15, 2010. On December 21, 2010 all students received a survey that asked about any illness experienced during the outbreak, daily habits, and perceptions of illness. The relative risk (RR) of illness was calculated. 


    Results: A total of 170 students (77% response rate) completed the survey. The median age was 17 years for cases (n=33) and students without mumps (n=137). There was no increased risk of illness for students sleeping most nights in a dormitory room vs. sleeping at home (RR=0.43, confidence interval [95% CI] 0.17, 1.08), or for students with two or more roommates compared to those with one roommate (RR=1.08, 95% CI 0.57, 2.08). Both cases and students without mumps reported contact with a median five students who were ill with mumps, however spending more than two hours of face-to-face contact did not increase the risk for mumps (RR = 1.47, 95% CI 0.65, 3.38). The risk for illness was not increased for students who thought mumps was a serious illness, students who believed there was a real outbreak at the school, or students concerned about their risk of contracting mumps (p>0.05).

    Conclusion: Student’s sleeping arrangements, relationships with ill students, and beliefs about mumps illness did not contribute to the risk of acquiring mumps within this outbreak. The control of mumps in a closed environment may continue to rely on herd immunity in conjunction with early detection and vigilant public health interventions.

    Subject Category: I. Adult and Pediatric Vaccines

    Crystal Witherspoon, MPH1, Eric Foster1, Caroline C. Johnson, MD1 and Ami S. Patel, PhD2, (1)Division of Disease Control, Philadelphia Department of Public Health, Philadelphia, PA, (2)Career Epidemiology Field Officer Program, Centers for Disease Control and Prevention, Philadelphia, PA


    C. Witherspoon, None

    E. Foster, None

    C. C. Johnson, None

    A. S. Patel, None

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