Fig. 3

Mono-associations of germfree adult polyps with single bacterial strains. Isolates were classified as early- or late-appearing depending on their appearance during early or late recolonization. Polyps were recolonized with single bacterial isolates for 7 days before polyps were homogenized and spread on MB plates. Colonies were counted after 3 days of incubation (n = 5). On the left were all early- or all late-appearing bacteria pooled (Kruskal–Wallis chi-squared = 16.528, p < 0.0001). On the right bacteria are shown separately. The y axis shows counted colony forming units (CFU) per polyp after recolonization with single bacteria. Data were log10-transformed