In table 1, three of the organisms: E. coli, E. aerogenes, and S. epidermidis, had abundant growth while S. faecalis had moderate growth. All samples corresponded to the ideal results as seen in table 4. Since tryptic soy agar is a type of enriched media, it has an extra abundance of nutrients causing microorganisms to colonize. In tryptic soy agar, some ingredients include: pancreatic digest of casein, papaic digest of soybean meal, and sodium chloride (Reddy et al., 2007). The casein and soybean meal present in this nutrient plate provides a source of organic nitrogen, vitamins and minerals, such as amino acids and peptides with longer chains (Siegrist, n.d.). As well, the soybean meal also has sugars, further promoting the growth of bacteria (Siegrist, n.d.). Lastly, the sodium chloride in this plate helps sustain the osmotic equilibrium. Through these extra components on the tryptic soy agar plate that are not present in the other plates, the microorganisms are in a more preferred environment. Because of this, there is more growth observed for all four organisms than on the EMB plate or the KF streptococcal
In table 1, three of the organisms: E. coli, E. aerogenes, and S. epidermidis, had abundant growth while S. faecalis had moderate growth. All samples corresponded to the ideal results as seen in table 4. Since tryptic soy agar is a type of enriched media, it has an extra abundance of nutrients causing microorganisms to colonize. In tryptic soy agar, some ingredients include: pancreatic digest of casein, papaic digest of soybean meal, and sodium chloride (Reddy et al., 2007). The casein and soybean meal present in this nutrient plate provides a source of organic nitrogen, vitamins and minerals, such as amino acids and peptides with longer chains (Siegrist, n.d.). As well, the soybean meal also has sugars, further promoting the growth of bacteria (Siegrist, n.d.). Lastly, the sodium chloride in this plate helps sustain the osmotic equilibrium. Through these extra components on the tryptic soy agar plate that are not present in the other plates, the microorganisms are in a more preferred environment. Because of this, there is more growth observed for all four organisms than on the EMB plate or the KF streptococcal