MadSci Network: Microbiology |
Hi. I am a fourth year student at the University of Toronto. I found your website on antibacterial soap very helpful to an experiment i'm currently engaged in. The point of this experiment was to compare various antibacterial soaps (Valiant, Bacdown,and Jergens) and seeing their effectiveness in removing bacteria from the hands. Might i please explain this experiment so that you can answer a few questions that i have on them? Experiment:Before washing my hands with the soap, i made five- fingered print on an agar plate and called this the 'before' plate. I then washed my hands with a proper handwashing method and did a five-fingered print on a separate agar plate and called this the 'after' plate. I incubated these plates at 35 degrees for about a week. The results: the 'before' plate had three types of bacteria on it: numerous yellow and orange colonies, and a few white colonies. The 'after' plate had only white colonies, but what was surprising to me was that there were more white colonies on this plate than there were in the 'before' plate! i realize that the antibacterial sopa got rid of the two types of bacteria, but why did the third type grow after i washed my hands? Could it be that the soap contained some compound needed for the bacteria to grow? or was there now more nutrient availability on the 'after' plate since no other bacteria is competing for food so the white colonies thrived?& nbsp; i'd be greatful if you can get back to me on this topic. And also if you know which of the antibacterial soap i listed is more effective and how phenol and lysol affect bacterial growth at different concentrations, could you please write back to me if it's no trouble? if you know of any websites that might help me, i'd appreciate it if you can give them to me. my papers depend on your answers. thank you so much. Subi.
Re: Antibacterial soap experiment
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