title: Investigation of a cholera outbreak in a tea garden of sivasagar district of assam.
abstract: BACKGROUND
  In late May 2012, Bagjan division of Borbam tea estate, of Sivasagar district of Assam was affected by an outbreak of acute watery diarrhea, subsequently confirmed as Vibrio cholerae O1.
  
  
  OBJECTIVE
  Our objective is to investigate and control the acute diarrheal disease outbreak in Sivasagar district of Assam.
  
  
  METHODS
  A physician-epidemiologist-led team did rapid outbreak investigation to confirm the outbreak and instituted treatment and control measures. Quantitative data collection was done using standard schedule and qualitative data by using key informant interview schedule.
  
  
  RESULTS
  Spot mapping of cases was done along the garden residential lines. About 120 suspected cases were line listed; with 1:1.23 male: female ratio. Ages ranged from 3 to 70 years (median - 40.5 years). Attack rate was 4.79% with one death; case fatality rate was 0.83%. Open air defecation was practiced by 94.6%. Rectal swabs were positive for V. cholerae O1 (Ogawa). All the piped water samples were class IV unsatisfactory for domestic use.
  
  
  CONCLUSIONS
  There is a need to improve water and sanitation facility in the tea garden lines along with implementation of a strengthened disease surveillance system through integrated disease surveillance project covering all tea estates.
authors.affiliation: Department of Medicine, Assam Medical College, Dibrugarh, Assam, India.
authors.forename: Bhupendra Narayan
authors.initials: BN
authors.lastname: Mahanta
authors.forename: Tulika Goswami
authors.initials: TG
authors.lastname: Mahanta
authors.forename: Rochan
authors.initials: R
authors.lastname: Sinha
authors.forename: Abhijit
authors.initials: A
authors.lastname: Dutta
authors.forename: D
authors.initials: D
authors.lastname: Payeng
authors.forename: Q
authors.initials: Q
authors.lastname: Jawed
keywords: Assam; Sivasagar; cholera; outbreak; tea garden