ETV5 and infection: In our study, some patients treated only with surgery and clarithromycin (or azithromycin) monotherapy experienced recurrent infections (Table S2), and some patients (4 out of 11 cats and 1 out of 9 dogs) infected with MABC demonstrated inducible macrolide resistance (confirmed by clarithromycin susceptibility testing or detection of the functional erm(41) gene).