“…With this increase in fluoroquinolone-resistant Campylobacter, macrolides have become common drugs in treatment of campylobacteriosis (Luangtongkum et al, 2009). Macrolides, including tylosin, tilmicosin, tulathromycin, and tildipirosin, have been widely used in animal production in many countries (Poehlsgaard et al, 2012;McEwen and Collignon, 2018), and macrolide-resistant Campylobacter strains have been isolated in many regions (Kaakoush et al, 2015;Zhang et al, 2016) and from animals (Wang et al, 2016;Lim et al, 2017;Hafez and Attia, 2020). Tetracycline has also been extremely widely used in animal farming because it has broad-spectrum antibacterial activity, low cost, and excellent efficacy (Chopra and Roberts, 2001), and it may have cause high tetracycline resistance in Campylobacter from food-producing animals (Premarathne et al, 2017;Woźniak-Biel et al, 2018).…”