Box 1 Search strategy for MEDLINE (Mesh, Medical Subject Headings)

1: Prevalence [Text Word] OR Prevalence [Mesh Term]

2: Epidemiology [Text Word] OR Epidemiology [Mesh Term]

2: Cryptosporidium [Text Word] OR Cryptosporidium [Mesh Terms]

3: Cryptosporidiosis [Text Word] OR Cryptosporidiosis [Mesh Term]

4: Animal [Text Word] OR Animal [Mesh Term]

5: Cattle or Calf or Sheep or Goat or Camel or Horse or Rodent or Bird or Chicken

6: Iran

7: Serology [Text Word] OR Serology [Mesh Term]

8: PCR [Text Word] OR PCR [Mesh Term]

7: Microscopic [Text Word] OR Microscopic [Mesh Term]

5: Meta-analysis [Text Word] OR Meta-analysis [Mesh Terms]

6: 1 AND 2 AND 3 AND 4 AND 5 AND 6 AND 7