title: Disparities of Shigellosis Rates among California Children by Race/Ethnicity and Census Tract Poverty Level, 2000-2010.
abstract: BACKGROUND
  We examined surveillance data for disparities in shigellosis rates among children by census tract (CT) poverty level and race/ethnicity in California.
  
  
  METHODS
  We geocoded addresses of 9740 children younger than 15 years of age from 2000-2010 California shigellosis surveillance data and calculated incidence rate (IR) per 100,000 population by age group and race/ethnicity. We linked geocoded cases to 2006-2010 American Community Survey CT-level poverty data and used IR ratios to compare children in the most impoverished CTs with those in the least impoverished CTs. The contribution of socioeconomic inequalities to age-standardized racial and ethnic disparities was explored using Poisson regression.
  
  
  RESULTS
  Per 100,000 population, shigellosis IR was highest among California children less than 5 years old (16.4) and of Hispanic ethnicity (15.2). The age-standardized IR was 22.3 per 100,000 person-years in CTs with more than 40% of the population below the poverty line and 4.1 per 100,000 person-years in CTs with less than 5% of the population below the poverty line, an IR ratio of 5.8 (95% confidence interval: 5.2, 6.5).
  
  
  CONCLUSIONS
  Shigellosis rates among California children were highest among Hispanics and increased with CT poverty.
authors.affiliation: From the *Environmental Health Investigations Branch, †Occupational Health Branch, and ‡Infectious Diseases Branch, California Department of Public Health, Richmond, California.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Jackson
authors.forename: Daniel
authors.initials: D
authors.lastname: Smith
authors.forename: Farzaneh
authors.initials: F
authors.lastname: Tabnak
authors.forename: Duc
authors.initials: D
authors.lastname: Vugia
mesh_terms: D000293:Adolescent; D001741:Black or African American; D002140:California / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004405:Dysentery, Bacillary / Q000453:epidemiology*; D005260:Female; D062305:Geographic Mapping; D006630:Hispanic or Latino; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011203:Poverty; D044465:White People