Testing antibotics on bacteria

Introduction Problem         To determine the effect of ten varied antibiotics on deuce different types of bacteria. I go forth running six antibiotics on Escherichia coli, and six antibiotics on bacillus subtilis. On Escherichia coli I will rill tetracycline, chloramphenicol, furadantin, nalidixic acid, triple sulfa, and kanamycin. On Bacillus subtilis I will test streptomycin, erythromycin, novobiocin, tetracycline, chloramphenicol, and penicillin. As a posture observation, I would too equal to see if Bacillus subtillis shows protection to penicillin. The use of penicillin is being cut down because of the resistance many another(prenominal) types of bacteria are developing against it.          Hypothesis         My dead numeration is that penicillin will inhibit the most growth against Bacillus subtilis, and that tetracycline will stop Escherichia coli more effectively than the others. Rationale         Â I facial expression that this experiment is valid because it shows how different antibiotics contradict to different types of bacteria. It also points out the fact that not entirely in all antibiotics work the kindred or that they work at all on all types of bacteria.

Materials 1 feeding bottle of tryptic soy agar-agar 1 culture of Escherichia coli 1 culture of Bacillus subtilis 4 stereotypic petri yellowish pinkes 1 pack of test discs 2 unfruitful pipettes 2 tubes of physiological saline 1 forceps 1 wax pencil 2 sterile swabs Method 1. slack up the cap of the tryptic soy agar to allow it to v ent. localise the bottle in a piddle bath! at degree Celsius degrees Centigrade so that the water level reached the level of the medium. The agar will melt in about 20 minutes. 2. piecemeal settle down the medium to about 45 degrees Centigrade by allow the water bath cool. Then let the medium mould for 10 minutes. 3. Pour two plates for each species of bacteria. The agar should be nigh 5 mm deep. Cover each petri dish right off after poring... If you want to get a teeming essay, revise it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay