The data were double-entered and validated in EpiData (www.
epidata.dk). Statistical analysis was carried out using STATA version 12
(StataCorp LP; College Station, TX). We calculated the cumulative
prevalence for all IPIs. The cumulative prevalence is the combined prevalence
of the results from all applied diagnostic methods for a specific
parasite. Potential risk factors were determined by matching the
parasite infection status of humans and animals with corresponding
questionnaire data, either at individual or household level. Possible
risk factors were determined by regression analysis and were considered
significant at p-levels smaller than 0.05.