title: Baseline Trachoma Surveys in Kaskazini A and Micheweni Districts of Zanzibar: Results of Two Population-Based Prevalence Surveys Conducted with the Global Trachoma Mapping Project.
abstract: Based on health care records and trachoma rapid assessments, trachoma was suspected to be endemic in Kaskazini A and Micheweni districts of Zanzibar. This study aimed to investigate the prevalence of trachomatous inflammation-follicular (TF), and trachomatous trichiasis (TT) in each of those districts.
  
  
  
  The survey was undertaken in Kaskazini A and Micheweni districts on Unguja and Pemba Islands, respectively. A multi-stage cluster random sampling design was applied, whereby 25 census enumeration areas (clusters) and 30 households per cluster were included. Consenting eligible participants (children aged 1-9 years and people aged 15 years and older) were examined for trachoma using the World Health Organization simplified grading system.
  
  
  
  A total of 1673 households were surveyed and 6407 participants (98.0% of those enumerated) were examined for trachoma. Examinees included a total of 2825 children aged 1-9 years and 3582 people aged 15 years and older. TF prevalence in 1-9-year-olds was 2.7% (95% confidence interval, CI, 2.7-4.1%) in Kazkazini A and 11.4% (95% CI 6.6-16.5%) in Micheweni. Among people aged 15 years and older, TT prevalence was 0.01% (95% CI 0.00-0.04%) in Kazkazini A and 0.21% (95% CI 0.08-0.39%) in Micheweni.
  
  
  
  Trachoma is a public health problem in Micheweni district, where implementation of all four components of the SAFE strategy (surgery, antibiotics, facial cleanliness, and environmental improvement), including mass drug administration with azithromycin, is required. These findings will facilitate planning for trachoma elimination.
authors: a Department of Eye Care , Ministry of Health , Zanzibar , Tanzania.
authors: Fatma J
authors: FJ
authors: Omar
authors: b Iringa Regional Referral Hospital , Iringa , Tanzania.
authors: George
authors: G
authors: Kabona
authors: c Program for Neglected Tropical Diseases , Ministry of Health , Zanzibar , Tanzania.
authors: Khalfan M
authors: KM
authors: Abdalla
authors: c Program for Neglected Tropical Diseases , Ministry of Health , Zanzibar , Tanzania.
authors: Saleh J
authors: SJ
authors: Mohamed
authors: d Public Health Laboratory , Ivo de Carneri, Chake Chake, Pemba Island , Zanzibar , Tanzania.
authors: Said M
authors: SM
authors: Ali
authors: d Public Health Laboratory , Ivo de Carneri, Chake Chake, Pemba Island , Zanzibar , Tanzania.
authors: Shaali M
authors: SM
authors: Ame
authors: e Sightsavers Tanzania , Dar es Salaam , Tanzania.
authors: Abel
authors: A
authors: Ngwalle
authors: e Sightsavers Tanzania , Dar es Salaam , Tanzania.
authors: Christina
authors: C
authors: Mbise
authors: f RTI International , Washington , DC , USA.
authors: Lisa
authors: L
authors: Rotondo
authors: g Task Force for Global Health , Decatur , GA , USA.
authors: Rebecca
authors: R
authors: Willis
authors: g Task Force for Global Health , Decatur , GA , USA.
authors: Rebecca M
authors: RM
authors: Flueckiger
authors: h Kilimanjaro Christian Medical Centre , Moshi , Tanzania.
authors: Patrick A
authors: PA
authors: Massae
authors: g Task Force for Global Health , Decatur , GA , USA.
authors: Ana
authors: A
authors: Bakhtiari
authors: i Clinical Research Department , London School of Hygiene & Tropical Medicine , London , UK.
authors: Anthony W
authors: AW
authors: Solomon
authors: j RTI International , Dar es Salaam , Tanzania.
authors: Jeremiah M
authors: JM
authors: Ngondi
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D016000:Cluster Analysis; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D007223:Infant; D008297:Male; D015995:Prevalence; D013636:Tanzania / Q000453:epidemiology; D014141:Trachoma / Q000453:epidemiology*; D058457:Trichiasis / Q000453:epidemiology*; D055815:Young Adult
keywords: Baseline survey; GTMP; SAFE strategy; Zanzibar; trachoma; trichiasis