Guiding Control: Spatial Epidemiology of NTDs

Simon BrookerLondon School of Hygiene & Tropical Medicine

Launch of the London Centre for Neglected Tropical Disease Research London School of Hygiene & Tropical Medicine

30th January 2013

Global Atlas of Helminth Infections: Ascaris lumbricoides in Latin America & sub-Saharan Africa

Mapping lymphatic filariasis (LF)

Mapping trachoma: prevalence of trachomatous inflammation–follicular, 1985-2012

Defining the transmission limits of STH species: temperature and aridity exclusions

• Areas at stable risk of transmission for at least one STH species (dark green), unstable transmission of at least one species (light green) or at no risk of transmission for any STH species (dark grey)• Pink hatching indicates countries excluded on the basis of socioeconomic status; also shown are irrigated areas (blue), urban extents (dark pink) and surrounding peri-urban extents (light pink).

Estimating the global burden of STH in 2010

3.99 billion people are at risk of any level of hookworm transmission, whilst 4.00 billion are at risk of any level of A. lumbricoides and T. trichiura transmission

1.71 billion people (95% BCI: 1.36 – 2.11 billion) infected with at least one species of STH

DALYs:Ascariasis 1.3 million DALYs (95% CIs: 0.7-2.3)Trichuriasis 0.9 million DALYs (95% CIs: 0.3-1.1)Hookworm 3.2 million DALYs (95% CIs: 1.7-5.7)

Country estimates: Ascaris lumbricoides

Spatial modelling of the prevalence of STH infection, 2010Bayesian geostatistical modelling

A. lumbricoides T. trichiura

Spatial modelling of STH in Kenya: a control planning tool

Understanding the context: LF treatment coverage

Understanding the context: mapping water and sanitation

Spatial modelling of water & sanitation statusUse of geostatistical small-area estimation

Evaluating mapping approaches for trachoma: Comparison of integrated threshold mapping and cluster random sampling

Overla

y

Graphs a

nd tables

Combining data

source

s

Map nav

igation

Map download

Input own data

Zooming

Map email

ing

View source

data

Web-base

d

Stand-al

one

Drawing n

ew objects0%

20%

40%

60%

80%

100%

not rated

least impor-tant

very impor-tant

Developing a NTD mapping tool: End user survey of functions and applications

Survey of control programme managers and NTD staff

Reports

Training materials