Fig 1.
Study sites (Random and purposively selected villages/wards or randomly selected schools) in the Salem district with two Health Unit Districts (HUD): Salem and Attur.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com.
Fig 2.
Study design and sample sizes.
CFA- circulating filarial antigen, C.q– Culex quinquefasciatus, LF- lymphatic filariasis, Mf- Microfilaria, MX- Molecular xenomonitoring, PPES- Probability proportional to estimated size, Wb- W. bancrofti.
Fig 3.
Sites with circulating filarial antigen (CFA) positives in the 30 random sites of Salem district.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: CFA- circulating filarial antigen.
Fig 4.
Households with circulating filarial antigen positives in 30 random sites, Salem district.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: CFA- circulating filarial antigen.
Fig 5.
Distribution of schools with circulating filarial antigen (CFA) positive children in Salem district.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: CFA- circulating filarial antigen.
Fig 6.
Distribution of sites with vector infection in the 30 random sites of Salem district.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: MX- Molecular xenomonitoring.
Table 1.
Site-wise circulating filarial antigen (CFA) positivity in the purposive sites of Salem district.
Table 2.
Site-wise vector infection prevalence in the purposive sites.
Fig 7.
Distribution of households with human and vector infection in the 5 purposive sites.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: CFA- circulating filarial antigen, MX- Molecular xenomonitoring.
Fig 8.
Administrative blocks with sites indicating signals of ongoing transmission, share borders with lymphatic filariasis endemic districts.
Base layer of map: https://onlinemaps.surveyofindia.gov.in. License information: https://onlinemaps.surveyofindia.gov.in/GeospatialGuidelines.aspx. ArcGIS Software: https://www.arcgis.com. Legend: CFA- circulating filarial antigen, MX- Molecular xenomonitoring.