Fig. 3

Phylum detection across the 62 studies included in our review of gastrointestinal helminth parasite studies associated with the gene markers 18S ribosomal RNA (18S rRNA), 28S ribosomal RNA (28S rRNA), nuclear internal transcribed spacer 2 (ITS2), cytochrome c oxidase I (COX1), 12S ribosomal RNA (12S rRNA) and 16S ribosomal RNA (16S rRNA)