source studies Blood 78 Feces 24 Cultured cells 15 Plant 13 Liver 11 Bacterial cells 10 Urine 9 Intestine 6 Brain 6 Unspecified 5 Heart 4 Muscle 4 Roots 4 Kidney 4 Cerebrospinal fluid 3 Cells 3 Cecum 3 Fungal cells 2 Water 2 Seeds 2 Tail 2 Lung 2 Macrophages 2 Colonic mucosa 1 Infected Red Blood Cells 1 Colon 1 Bone marrow 1 Insect tissue 1 Head tissue 1 gWAT 1