Fig. 1

Number of Listeria monocytogenes isolates of each clonal complex (CC) in the animal clinical dataset according to the clinical form. The clinical dataset consisted of 350 isolates; the analyzed clinical forms were rhombencephalitis (n = 194), abortion (n = 128) and other (rare) clinical forms, namely mastitis (n = 13), enteritis (n = 7), septicemia (n = 6) and ocular listeriosis (n = 2). Only the most frequent CCs are shown, except in ‘Other clinical forms’. Numbers above the columns indicate the CC frequency. Statistically significant associations (Fisher’s exact test) with a clinical origin (‘All clinical forms’) or a specific clinical form of listeriosis (‘Rhombencephalitis’, ‘Abortion’) are indicated with asterisks. Significance levels: * p < 0.05, ** p < 0.005, *** p < 0.0005, **** p < 0.0001