Gram-negative bacteria

variety of microorganisms residing in the oral cavity. Many of these bacteria are harmless to humans and are natural to the body. However, there are several that can cause decay and chronic infection in the oral cavity, which are also known as gram negative bacteria (Gehrig & Willmann, 2016). Biofilm, also known as plaque that forms on teeth, contains an organized matrix of microorganisms, which consists of these gram negative bacteria that can cause periodontitis. There are several types of biofilm

Microbiology project: Bibliography of Elizabeth Osborne King Elizabeth Osborne King was born in Fulton County Georgia on October 12, 1912. She was a well known American microbiologist who specialized in identifying difficult bacteria. She was educated at the University of Georgia, where she graduated with a B.S. in Zoology in 1935. She went on to obtain her M.S in Medical Technology from Emory University in Atlanta in 1938, and wrote her thesis on the effects of new antimalarial drugs on avian malaria

Through three different methods, bacteria can obtain new genetic material: conjugation, transduction and transformation Transduction is when a bacteriophage inserts it 's DNA into the host bacteria cell, while conjugation is when the bacteria shares DNA through direct contact, eg. horizontal gene transfer. The third method, transformation, is the intake of external DNA into the cell (Chen and Dubnau, 2004). In order for bacteria to be able to take in extraneous DNA, they must first be in a state

A majority of the diversity of air is misunderstood by ecologist. Yet, the limited amount of research conducted on the diversity of the atmosphere supports that air is highly diverse. Samples taken from the atmosphere were dominated by plant and bacteria related sequences, indicating a highly variable 16sRNA gene diversity (2). When samples are taken from the atmosphere, there is a trend of a

Summary Mastitis is a condition affecting dairy cows that has significant impacts on producers, processors and consumers. The disease causes a reduction in milk yield and quality, as well as contributing to antibiotic use and the development of resistant bacterial strains. Mastitis can also increase the susceptibility of an affected cow to secondary health issues due to immune suppression caused by the infection. Physiological, environmental and management factors can all increase the risk of a

D-Phenylalanine and α, γ-Diamino Butyric acid (DAB). DAB amino acids carry a charge of +1, and with five DABs present this gives the cationic peptide a total charge of +5 [34]. PMB1 is known to be highly potent and is selective principally to gram-ve bacteria, it is effective against all but the Proteus group [190]. It has been shown to successfully treat infections caused by Pseudomonas aeruginosa, with only limited confirmation of resistant strains developing [25, 191-193]. It has been referred

General Information Klebsiella pneumoniae is a Gram-negative rod bacterium that can form a capsule. It is found in the normal flora of GI tracts in humans. K. pneumoniae can become pathogenic in patients whose immune systems are compromised. K. pneumoniae can cause nosocomial urinary tract infections and pneumonia. In immunocompromised patients, death is possible (Klebsiella). For a person (patient) to get the K. pneumoniae bacteria, they have to have direct contact with another person. K. pneumoniae

Charles Gathathi BIOL 2420. Dr. Elizabeth Carrington. Proteus mirabilis: I. Introduction: Proteus mirabilis is a Gram-negative, dimorphic bacillus and a facultative anaerobe bacterium. It is a motile member of the family Enterobacteriaceae. This bacteria colonies shows a unique characteristic called swarming behavior. Swarming occurs when the flagellate rods grow into long chain swarmer cells, the swarmers gather together forming “rafts” that swim together, growing into a complex biofilm. P. mirabilis

pink, and it should be gram negative. In the Eosin Methylene Blue Agar, the color of the media should stay the same. There should be no growth in the colony, and it should be gram negative. In the Hektoen Enteric Agar, the color of the media should be dark blue. There should be no growth in the colony, and it should be gram negative. In the MacConkey Agar, the color of the media should stay the same. There should be no growth in the colony, and it should be lactose negative. In the Mannitol Salt Agar

has several effects on the human body. One of the most important effects is the inhibition of phosphodiesterase. It has been reported that caffeine can be considered an antimicrobial mediator most effective on E. coli (Dash, 2008). Some species of bacteria have been known to degrade caffeine and use it as a source of nutrients. In America one of the most consumed caffeine beverages is Coffee.