Answers are grounded in this paper and cite their sources.
The prevalence of Cryptosporidium spp. in diarrheic immunocompetent children living in Switzerland was 5.5% (15 of 273). Infection rates increased significantly with age. Anthroponotic Cryptosporidium hominis was identified in 11 children, 9 with a travel history. The zoonotic Cryptosporidium parvum bovine genotype was identified in 3 children (2 without travel history). Hence transmission of Cryptosporidium spp. is primarily of anthroponotic nature in the study area.
No takes yet. Share an insight, caveat, or question.
Glaeser et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: