Back in the lab, franklin took all strokes ...

From Barto currently decisions are places to put in a new fleet of vehicles and passengers' permanent aversion to the existing blue fabric seats, we decided to test BART seats to see what germs are hiding in the tissue. You can read the full story of what we found, the consequences for BART riders and reactions. Below-the-scenes look at the science in this story. Once we asked at San Francisco State University Department of Science, Darleen Franklin, head of the biology lab whod conducted similar tests in the past, volunteered to help us. Our goal was to find out what grows in the BART seats. We also decided to check plastic seat Mooney for comparison, since BART is now a choice between plastic, vinyl, cloth seats for their new cars. We went in mid-day on February 2 and jumped by 28 Muni line that runs from San Francisco State University in Daly City BART station. His line thats, widely used by students, some may consider themselves not purely creatures in the world. We wipe the back seat on the bus, then clean it with alcohol and wipe again with the idea that we would like to learn how easy it was to clean plastic. Students listen to their iPods, text messages on their phones, and nobody paid any attention to us. In Daly City BART station, we jumped on the train set off Dublin / Pleasanton BART collect our samples. Again, we went in the back seat, where soap headrest and seat cushion before and after cleaning the seat with alcohol. We also found wild stream, which we took to the lab for testing. Finally, we tested the air for the baseline. Back in the lab, Franklin took all swabs and streaked them on Petri dishes. Then we waited strattera online. On February 16 I went back to see what grew. You can see the result in the pictures. Samples of plastic seat Mooney released two small colonies of bacteria. Sample taken from the Mooney place (top row) after it has been cleaned with alcohol did not show growth of bacteria at all. Franklin said that indicated that the Mooney seats were easily cured. Next, we looked at a sample of seat headrest BART (second row). As bacteria and mold growing. Rubbing alcohol worked on the headrest, and no bacteria were detected after it has been cleared. The sample of seat cushion BART (third line) was a spectacle. There was an explosion of fluorescent bacteria colonies at least nine different strains, as well as mold. Even after the seat cushion has been emptied, the bacteria are still growing. Stream, we have also issued several colonies of bacteria. The next step was to do tests to determine which bacteria we found. Finally, Franklin test strains of bacteria to see if they are resistant to antibiotics, a sign that they are potentially dangerous for BART riders. As she examined for drug resistance was to grow the bacteria on sheep blood plate, which had little discs of antibiotics on the surface (see row four). If the bacteria avoid the drive, we know that they can be killed with antibiotics, but if they do so, we would know that they are resistant to drugs. Franklin identified three strains of bacteria, all of pillows BART, which were resistant to antibiotics. One strain was resistant totetracycline and sulfur-based antibiotics. Other studies have shown that bacteria are likely to come from fecal contamination, as Franklin said. That is, the person or not wash their hands after using the toilet or just spoil yourself in the seat BART. Another strain, resistant to penicillin were from the same source: human intestinal tract. The last strain of bacteria that are resistant to antibiotics, especially Fr. In two separate tests, Franklin identified characteristics of methicillin-resistant staphylococcus gold, or MRSA, which grow in the seat. The first test (in the middle row of four) confirmed the presence of staphylococcus aureus, a skin origin of bacteria, because bacteria transformed mannitol salt agar plates yellow with red. The second test confirmed that the bacteria were resistant to the antibiotics penicillin and methicillin, as MRSA (last picture in the fourth row). Bacterial growth is independent of these two antibiotics, growing right through them. However, the third test to make sure that bacteria will devour the blood cells of sheep that MRSA usually does, came back negative. Franklin said that this means that bacteria were the characteristics of MRSA and may be MRSA, but more tests will need to confirm what it was. Known as MRSA Superbug, because it is resistant to antibiotics. It infects people through open wounds, attacking the immune system, 19000 deaths per year associated with MRSA infections, according to the Centers for Disease Control and Prevention. Both cloth and hard plastic seats are bacteria and humidity of the riders. , 330,000 passengers ride BART every day. Last year the police received complaints from 1051 BART smoking, eating and drinking, 245 complaints urination or defecation, 82 reports of indecent exposure, including masturbation, and 56 reports of spitting. Our experiments show that the Mooney seats more sanitary and easier to treat. BART seats, conversely, is a breeding ground for fungus and bacteria. They are much harder to cure and dry off and, therefore, microbes flourish in the tissue. Web production Tasnim Raja. .