THE EFFECT OF SEVERAL ANTIBIOTICS ON <i>LACTOCOCCUS GARVIEAE</i> ISOLATED FROM JORDANIAN DAIRY PRODUCTS

Abstract

This study investigated the antibiotic resistance profile of the L. garvieae isolated strains from Jordanian dairy products. Disk diffusion method was used. In particular, different antibiotics were tested against L. garvieae; the antibiotic disks were Trimethoprim (5 µg), Clindamycin (2 µg), Nitrofurantoin (300 µg), Erythromycin (15 µg), Ampicillin (15 µg), Trimethoprim/Sulfamethoxazole (1.25/23.75 µg Polymyxin B (300U) and Tetracycline (30 µg). The results indicated high and statistically significant effects of Trimethoprim, Nitrofurantoin and Trimethoprim/Sulfamthoxazole on L. garvieae. Trimethoprim had the greatest antimicrobial effect on L. garvieae strains. All of the strains were sensitive to this antibiotic. Trimethoprim showed 20 mm inhibition zone in some strains. On the other hand, there were no antibiotic effects of Clindamycin and Polymyxin B on L. garvieae. Slight and statistically insignificant effects were found of other tested antibiotics. The study recommended using Trimethoprim antibiotic against L. garvieae because it inhibited its growths in all isolated cultures.

Assessment of Chromogenic Media in Bacterial Fish Pathogens

“…Staphylococcus genus has been implicated as pathogen for fish and causing septicemia-like signs, exophthalmia and lesions around fins (Shotts and Teska 1989;Gil et al 2000). Another important fish pathogen L. garvieae affects mainly rainbow trout farms that cause losses approximately 50% of the total production (Ghittino and Prearo 1992;Alrabadi 2012;Tanrıkul 2012;Balta and Dengiz Balta 2019). Also, infected or carrier fish may spread the disease to healthy rainbow trout and lead to serious economic damage (Algöet et al 2009).…”