Streptococcus pyogenes Research paper MCB 2010C March 17‚ 2014 Nature of Causative Organism Streptococcus pyogenes‚ a group A streptococci‚ is a gram-positive‚ non-spore forming bacteria that can be seen as oval cocci chain forming shapes less than 2 micrometers in diameter under the microscope. It is a facultative anaerobe that can use fermentation for its metabolism. It needs a blood containing medium to grow and exhibits beta-hemolysis. It is a non-motile‚ nonspore forming bacterium. S. pyogenes
Premium Bacteria Microbiology Streptococcus
The Identification of Bacillus Badius [pic] Hannah Melanchuk Dr. Robert Suran May 1 2013 Microbiology Abstract Over a three week time span I was able to successfully identify an unknown microorganism by combining the results of several tests. The first test was the Gram stain test which showed the microorganism was Gram positive and rod shaped. Using an Unknown Identification Flowchart‚ I proceeded to inoculate a Starch plate. In week 2‚ I
Premium Gram staining Bacteria Microbiology
With science there are many branches‚ one of these branches is Microbiology and within this specific branch theories have been created. It may not be obvious theories are ever evolving and go through changes and previous theories are falsified and new ones emerge. For instance‚ the theory of biogenesis was first introduced by a man named Rudolph Virchow‚ who eagerly challenged the current theory of spontaneous generation at the time. Spontaneous generation theory was the thought that some forms
Premium Louis Pasteur Microbiology
INTRODUCTION This scientific report is to discuss the results of an experiment being conducted on the effect that antibiotics have on the growth of bacteria. This will be done through the use of microbiology. Microbiology is a science in the department of biology‚ particularly microorganisms. These include; bacterium‚ fungi‚ protozoa‚ algae and viruses. This is an important subject to study as microorganisms can be found everywhere‚ covering all matters of different surfaces even including the human
Premium Bacteria Microbiology Microorganism
Microbiology Lab Report II Title: Determination of a Bacteriophage Titer Purpose: To determine the number of phage particles or plaque-forming units in a suspension of T4 bacteriophage. Materials: 18 24 hour broth culture of Escherichia coli B. 2 ml suspension of T4 bacteriophages with a titer of at least 10‚000 phages/ml 5 trypticase soy agar (TSA) plates. These should be warmed to 37c before use 5 tubes of soft agar (0.7% agar). Prior
Premium Escherichia coli Microbiology Agar plate
References: • Bauman W‚ Robert. Microbiology with Diseases by Body System (3 ed).
Premium Bacteria Protein Microbiology
Investigating the Growth of P. fluorescens Biofilms at the Air-Liquid Interface and the Variations in Biofilm Integrity Abstract Pseudomonas fluorescens produces biofilms in a variety of environments‚ and in experimental situations has been shown to develop random mutations resulting in a phonotypical change in the resulting biofilm. One particular mutation resulted in the growth of a biofilm known as the Wrinkly Spreader‚ which produced a thicker‚ stronger biofilm that had a stronger attachment
Premium Bacteria Pseudomonas aeruginosa Archaea
of Bacillus subtilis colonies on agar plates”. FEMS Microbiology Ecology 13: 159-167 4. Anna Csillag‚ 1972. “Appearance of acid-fast rods in cultures of mycococcus luteus”. Tubercle and Lung Disease 53: 221-225 5. James A. Bastock‚ Michelle Webb and Jane A. Grasby‚ 2007. “The pH dependence of the Escherichia coli RNase HII-catalysed Reaction Suggests that an Active Site Carboxylate Group Participates Directly in Catalysis”. Journal of microbiology 368: 421-433 6. Lloyd D. Witter‚ 1961. “Psychrophilic
Premium Bacteria Escherichia coli Microbiology
Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
Premium Gram staining Bacteria Staining
understanding become apparent. In the study of living things‚ the Luria and Delbrück experiment stands out for its unique role in opening the door to genetics and microbiology. Though it initially made little impact on the natural sciences‚ it would come to be recognized as a cornerstone in the development of genetics and microbiology. Luria and Delbrücks fluctuation test showed that mutations arise absent from selection‚ consequently establishing that Darwinian natural selection acted on bacteria
Premium Bacteria DNA Gene