Chloramphenicol And S. Epidermidi

The data gathered from this experiment showed that chloramphenicol resulted in the largest zones of inhibition when S. epidermidis and S. enteritidis were exposed to it (Tables 1 & 2, Figure 2). Vancomycin caused the second-largest zones of inhibition in S. epidermidis, larger than the zones caused by nalidixic acid, but had no visible effect in S. enteritidis (Figure 2). When S. enteritidis was exposed to nalidixic acid, it created zones of inhibition just slightly smaller than the zones created by chloramphenicol (Table 2). However, the error bars for S. enteritidis’ results for nalidixic acid and chloramphenicol overlap, which suggests that the difference between the two may not be significant (Figure 2). These results support part of the hypothesis as the two species of bacteria developed different zones of inhibition when exposed to the three antibiotics. Gram-staining confirmed the identity of S. epidermidis as a gram-positive bacteria and S. enteritidis as a gram-negative bacteria. …show more content…
Thus, out of the three antibiotics, chloramphenicol can be interpreted as the most effective against both S. enteritidis and S. epidermidis. Against S. epidermidis, vancomycin can be seen as the second most effective and nalidixic acid as the least effective antibiotic. Nalidixic acid was almost as effective against S. enteritidis as chloramphenicol was, and vancomycin had no effect as