Negative liberty

CLOSTRIDIUM TETANI Introduction Clostridium tetani is a microorganism that has effected the lives of many people. This bacteria is the cause of the disease many people have come to know as Tetanus. It infects its victims by releasing a toxin in the human body that causes an infection in the nervous system (Hassel, 2013). The first experimentations with Tetanus began in the 1800’s when scientists began infecting animals with samples from infected humans. In 1889, one scientist by the name…

Staphylococci are catalase positive, while Streptococci negative. To future identify species of Streptococci, growth on blood agar plate will be necessary to recognize level of haemolysis. S. pneumonia is α-haemolysis (Allegrucci and Sauer, 2006), which will appear as dark greenish discoloration under the colonies…

ferric chloride was added to phenylalanine deaminase tube, it turned into army green color( positive result) which indicated that unknown microorganism contains phenylalanine deaminase enzyme. On the other hand, no color change in the slant indicates negative result for this test. The choices between two…………………. was narrowed down By performing this test. The positive result for phenylalanine deaminase indicated the unknown microorganism #404 is P.vulgaris. To check motility of an unknown…

Jaqueline Moreira Biology 23 March 8, 2016 Pseudomonas aeruginosa Introduction P. aeruginosa belongs to the family called Pseudomonadaceau ( Willey, J., Prescott Microbiology, 2014, p.527). P. aeruginosa is a gram negative bacterium. The shape of this particular bacterium is straight or slightly curved rods, but not helical. The size of this bacterium is about 0.5-1.0 micrometers wide and 1.5-5.0 micrometers long. The arrangement is single, but as is starts to age it forms cysts. P.…

Anthrax is a highly infectious disease that normally affects herbivores (livestock) and unfortunately may also spread to humans through inhalation, ingestion or any sort of skin contact of the bacterium, Bacillus anthracis. Bacillus anthracis (B. anthracis) is a gram positive spore forming bacterium that invades the human body and leads to various symptoms of Anthrax, depending on how virulent it has become. These symptoms include; swollen neck glands, bloody diarrhoea, vomiting blood, extreme…

supposed to determine either the bacteria is classified as gram-positive or gram-negative (Sadava, 2011). We dropped KOH with our bacteria and mixed it. After about a minute, we should have been able to tell if a string has formed or not. We have didn’t have a string form, so we had gram-positive bacteria and a negative string test result. We then did other tests because the string test has a high possibility for false negatives and results can be inconclusive. We swabbed out bacteria on…

Haley Collins Ms. Graham Period 3 Biology H February 27th 2015 Bionic Antibiotics VS. Bacteria Abstract: The bacteria lab preformed in class tested the effectiveness of antibiotics against bacteria. During the lab we tested the antibiotics penicillin, streptomycin and tetracycline against the bacteria Escherichia coli and Staphylococcus epidermis in order to determine which antibiotics fought which bacteria most successfully. In order to monitor the experiment, we kept a control sample in…

Preliminary qualitative chemical tests show the presence of alkaloids, carbohydrates, saponins, steroids, terpenoids, phenolics, coumarins and fixed oil, etc.18 Desorption electrospray ionization was employed for fast and direct ambient detection of the anti-tumor drug, camptothecin, and its derivative, 9-methoxycamptothecin in Nothapodytes nimmoniana J. Graham. Different parts of the plant such as leaves, stems and bark were examined. The…

DISCUSSION: Pseudomonas aeruginosa was selected to study their antimicrobial activity due to the production of pyocyanin, an antimicrobial phenazine pigment. For this study different clinical specimen were collected and from these P. aeruginosa was isolated. To isolate good pyocyanin producing P. aeruginosa, repeated plating of all the isolates on cetrimide agar helped in final selection of the 5 isolates. To examine the antimicrobial activity of those isolates, in vitro inhibition by cross…

bacterial cell clumping. We observe the samples from bottles 1 and 3 to be coagulase negative. In order to treat the patient successfully, we need to determine which antibiotics will possibly clear the infection. Our isolate is susceptible to the following…