ACE Research Journal of Microbiology and Biotechnology

  • ISSN Print: 2520-3975, ISSN Online:
  • Start Year: 2021
  • Volume: 3 (2023), Issue: 2

Effect of Antibiotic Use on Streptococcus mutans in Al-Najaf Province

Author: Adil Ibadi Al-Luhaiby
Page: 67-72
Published online: 22 Nov 2023


October 2020 to May 2021 could be the duration of this study. In the central laboratory of a hospital located in the province of Al‐Najaf, Streptococcus mutans bacteria from dental caries infections are identified, isolated, and tested to ascertain their susceptibility to antibiotic sensitivity and biofilm formation. The results showed that 68 isolates from 150 samples taken from dental caries infections belonged to oral streptococci. Furthermore, 20 bacterial isolates of S. mutans (13.3%) were discovered. The isolates revealed percentages of resistance to Amoxicillin, Ampicillin, Cefepime, and Optochin (100%) and percentages of sensitivity to Tetracycline (70%) and Erythromycin (65%), Streptomycin (60%), and Ciprofloxacin (50%). Tetracycline had a minimum inhibitory concentration (MIC) of 256–1024 micrograms per milliliter, whereas erythromycin had a MIC of 64–1024 micrograms per milliliter.