Table 1: Source of information and helminths used. The middle column describes the number of independent sources of information, for example, a single blog, a single book or a single provider. The column on the right describes the number of individual self-treaters attributed to the sources in the middle column. aOnly stories involving specific individuals that were not apparently duplicated in other sources were used. bData were compiled in January of 2015. The estimated number of individuals using helminths at the present time does not generally change substantially in a period of months. However, the number of individuals using HDCs has risen from about 500 in January of 2015 to between 700 and 750 by April of 2015. cPublically available summary statistics from providers were not utilized, since updated numbers were obtained by interview.


Source of information Number of sources Organisms used; number of individuals a

Providers interviews 7 TSO; 4,000
NA; 900
TTO; 600
HDCs; 500 b

Surveys 58 TSO; 0
NA; 8
TTO; 1
HDCs; 44
NA + TTO; 2
NA + HDCs; 2
None at present; 1

Publically available information

Peer-reviewed literature 3 TSO; 0
NA; 1
TTO; 1
HDCs; 1

Books and magazine articles 7 TSO; 1
NA; 10
TTO; 0
HDC; 1

Web-based social networking sites 166 TSO; 11
NA; 114
TTO; 11
HDCs; 6
NA + TSO; 1
TSO + NA + TTO; 2
TSO + TTO; 3
NA + TTO; 27
NA + HDCs; 2

Videos and movies 3 TSO; 2
NA; 2
TTO; 1
HDC; 1

Provider-derived information c 5 TSO; 2
NA; 2
TTO; 1
NA + TSO; 4