title: Seasonal variation and trend of chicken pox in the southern region of Saudi Arabia (2007-2012).
abstract: BACKGROUND
  Chicken pox is a contagious disease caused by varicella zoster virus. Children are most susceptible to infection. In 1998, the WHO recommended that routine childhood varicella vaccination be considered in countries where the disease is a relatively important public health concern. There are few data on the trends of chicken pox. We aimed to evaluate the trend of chicken pox in Saudi Arabia (KSA) during the period 2007-2012.
  
  
  METHODS
  Data were collected by retrospective review of the existing anonymous surveillance records and book registries of chicken pox cases at the preventive medicine department of Armed Forces Hospital of the Southern Region of Saudi Arabia from 2007 to 2012. The collected data included the number, age, and sex of registered cases.
  
  
  RESULTS
  A seasonal pattern was clearly demonstrated, with peak in March and April. There was also a decreasing trend from 2007 to 2012. Most cases occurred in the age group 4-15 years. The number of infected male patients was a little higher compared with female patients. These results indicate success in controlling the disease in the southern region of Saudi Arabia, which may be attributed to the implementation of public health interventions targeted at reducing infectious diseases (such as the introduction of varicella zoster vaccine in 2008).
  
  
  CONCLUSIONS
  We recommend that a future study be conducted on the severity of chicken pox infection in adults (hospitalization, complications, and death) and a national survey among adults for the seroprevalence of markers of infection with varicella zoster.
authors.affiliation: aBiostatistics Department, High Institute of Public Health, Alexandria University, Alexandria, Egypt bDepartment of preventive medicine, Armed Forces Hospital of South Region, Khamis Mushayt, Saudi Arabia.
authors.forename: Noha
authors.initials: N
authors.lastname: Saleh
authors.forename: Bassem
authors.initials: B
authors.lastname: Al Moghazy
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D002644:Chickenpox / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006772:Hospitals, Military; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012042:Registries; D012189:Retrospective Studies; D012529:Saudi Arabia / Q000453:epidemiology; D012621:Seasons; D017678:Sex Distribution; D055815:Young Adult