Bacteria and Antibiotic Lab Write Up

I. Overview

The goals of the Bacteria and antibiotic lab are to observe the effect of five different types of antibiotics on the growth pattern of several different strains of bacteria. Also, individually each person will learn and practice aseptic technique in bacterial culture. Each group in the class will test out antibiotics on a different strain of bacteria, and the class data will be compiled and examined.

II. Procedure

I followed the given procedure step by step. However, I accidentally put tape on the edges of the Petri dish when I placed it in the tray to be incubated. So I had to take it out, and remove the tape before placing it back in. My partner made the same mistake, as we both thought that we were supposed to place tape around the sides to hold the dish closed. So both my partner and I, had to remove our dishes from the tray, take the tape off, and then place it back in.

English: Bacillus cereus showing hemolysis on shee...

English: Gram-stained Bacillus cereus and Escheric...

bacillus

However, this was a small mistake and would not have affected the outcome of our experiment in any way.

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III. Data

IV. Discussion

This lab is demonstrates the effects of different antibiotics on different strains of bacteria. Our data proves that various different antibiotics are effective against some strains of bacteria, but not of others. Each bacteria strain had one antibiotic that was highly effective on it, and one that hardly caused any inhibition of growth. Some strains of bacteria had multiple antibiotics that were highly effective in inhibiting its growth. Others were not affected by almost all but one type of antibiotic. Take the bacteria strain Bacillus cereus for example. This strain of bacteria was highly affected by every antibiotic used on it except for one, Penicillin. The results of...