Antimicrobial resistance in coagulase-negative staphylococci isolated from subclinical mastitis in Ettawa Crossbred goat (PE) in Yogyakarta, Indonesia

Abstract. Suwito W, Nugroho WS, Wahyuni AETH, Sumiarto B. 2021. Antimicrobial resistance in coagulase-negative staphylococci isolated from subclinical mastitis Ettawa Crossbred goat (PE) Yogyakarta, Indonesia. Biodiversitas 22: 3418-3422. Subclinical (SCM) Goat is most frequently caused by with a significant reduction milk yield. The aim of this study to determine antimicrobial patterns (CoNS) PE SCM. A total 36 CoNS isolates originating SCM were collected semisolid tube use study. All further examined for susceptibility testing the Kirby-Bauer disc diffusion method. Antibiotic samples according Clinical Laboratory Standards Institute (CLSI). showed highest rate against sulfamethoxazole (65%), ampicillin (55.56%), penicillin (45%), cefoxitin (33.33%), erythromycin (25%), oxytetracycline (20%), tetracycline (15%), gentamicin and neomycin (11.11%), while oxacillin was sensitive. multiple antimicrobials observed 15% ampicillin, tetracycline, then 5-10% penicillin, erythromycin, oxytetracycline. majority resistant then, followed cefoxitin, oxytetracycline, neomycin. In addition, penicillin-resistant multidrug-resistant (MDR).