Unknown lab report daisy m black december 3, 2013 the bacteria was shown as rod shaped type cocci pinkish color which is a characteristic feature of a gram negative bacteria the unknown gram-negative bacteria is enterobacter aerogenes. Essay unknown microbiology lab report unknow bacteria lab report unknown 36 introduction the purpose of this lab was to identify two unknown bacteria from a mixed culture the reason for identification of unknown bacteria was to help students recognize different bacteria through different biochemical tests and characteristics. Unknow bacteria lab report unknown 36 introduction the purpose of this lab was to identify two unknown bacteria from a mixed culture the reason for identification of unknown bacteria was to help students recognize different bacteria through different biochemical tests and characteristics. Learn microbiology lab identification unknowns with free interactive flashcards choose from 500 different sets of microbiology lab identification unknowns flashcards on quizlet.
Essay's paper body one side of the bhia medium was inoculated with the gram positive cocci and the other side with the gram negative unknown bacteria, completing this section of lab by placing the labeled medium into the 350c incubator for 48 hours. Kimsey cooper microbiology 210 lab final unknown report section#006/ radha report on identification of mixed culture unknown lab exercise 33 introduction the purpose of this experiment is to apply the knowledge gained from the entire semester in the microbiology lab and apply it to be able to identify bacteria. We will write a custom essay sample on unknown lab report microbiology specifically for you for only $1638 $139/page after the isolation of gram-‐positive and gram-‐negative bacteria from unknown a, specific biochemical tests were performed purple cocci, connected gram positive purple cocci.
Gram negative unknown lab report # 31 gram-negative bacteria have thinner layer of peptidoglycan, and are structurally more complex, with an outer membrane that contains lipopolysaccharides gram staining is a valuable tool to determine whether an unknown bacterium is gram negative or gram positive samples are first stained with crystal. Learn microbiology lab gram stain with free interactive flashcards choose from 500 different sets of microbiology lab gram stain flashcards on quizlet. Here is an excellent example of how to write an unknown lab report in microbiology class please note that due to formatting issues the flow charts had to be removed the two microorganisms were identified one was a gram-positive bacteria, the other was a gram-negative bacteria a series of biochemical tests were performed based on the. I started an unknown bacteria lab in school today i was handed a pure colony of an unknown bacteria the first thing i did was a gram stain it turns out to be gram positive cocci.
How to write an unknown lab report in microbiology general unknown reports in microbiology are written in scientific format scientific writing is written differently from other types of writing the results of the exercise or experiment are what are being after performing the gram stain to determine that the unknown was a gram negative rod. Bacteria _ gram reaction acetobacter aceti negative rod their ou report 1 receive your unknown tube and immediately record its code label in your note: no key is provided for gram negative cocci, so if your species belongs to this group, you need to make the key yourself 9. Methods could also be referred to the lab manual pages 159-163 microscope e1 was used to view unknown number 20 to determine whether the bacteria were gram-positive or gram-negative and cocci or bacillus.
Unknown lab report this lab report bacteria, while others were even more specific and used only for cocci bacteria the tests performed and what constitutes a positive and negative test are as follows bacteria because all of the possible unknown gram (-) bacteria were catalase positive this test is used to detect the presence of. Objective: to identify the bacterial unknowns in a mixed culture by morphological and biochemical methods principle: the identification of bacteria is a careful and systematic process that uses many different techniques to narrow down the types of bacteria that are present in an unknown bacterial culture. Structurally, the gonococci are similar to other gram-negative bacteria the cell envelope is composed of a cytoplasmic and an outer membrane, separated by the periplasmic space the outer membrane consists of proteins, lipo-oligosaccharides, and phospholipids. After eliminating the bacilli shaped bacteria from the separation outline, streptococcus mutans, micrococcus luteus, enterococcus faecalis, and staphylococcus aureus, were the remaining gram-positive bacteria to be tested for. One side of the bhia medium was inoculated with the gram positive cocci and the other side with the gram negative unknown bacteria, completing this section of lab by placing the labeled medium into the 350c incubator for 48 hours.
Bacterial pathogens as they pertain to the usmle step 1, specifically the gram positive cocci. Gram negative cells stain red and the gram positive cells stain purple, thus the gram stain is a differential stain , (ie it illustrates differences between bacterial cells) today, the identification of an unknown. Unknown lab report it was concluded that unknown “a” was gram positive cocci and unknown “b” was gram negative rods the following tables and flowcharts give a guideline as to which tests were performed and there outcomes for both gram positive and gram negative bacteria the following tests were performed on the unknown “a. The gram stain is used to differenciate gram-positive from gram-negative bacteria gram-positive bacteria have a thicker peptidoglycan layer and therefore retain the primary stain (crystal violet) whereas gram-negative cells lose it when treated with a decolourizer (absolute alcohol.
Gram-positive cocci shaped bacteria were identified using the microscope several biochemical tests were chosen based on the identification table which was given by the lab instructor these tests and results were recorded on the flow chart and the tables on the following pages for the gram-negative and gram-positive bacteria. Bacteria with thin or absent cells walls are gram-negative because they do not trap the gram stain dye shaping up bacteria spherical bacteria are termed cocci, bacteria that form straight rods are called bacilli and bacteria with an intermediate shape are called coccobacilli. Introduction gram staining is the most essential and universally used staining technique in bacteriology laboratory gram-staining was firstly introduced by cristian gram in 1883this method is used to distinguish between gram positive and gram-negative bacteria which have consistent differences in. Unknown lab report unknown organism #6 ann le (phuoc) may 6, 2010 dr carrington microbiology lab- mw 12:50 le 1 i introduction my unknown organism #6 is morganella morganii, which is a gram-negative bacillus rods commonly found in the environment and also in the intestinal tracts of humans, mammals, and reptiles as a normal flora.
Unknown lab report unknown number 115 gram positive cocci gram negative baccillus positive mannitol test positive catalase test also the blood agar and spirit blue agar test results confirmed this conclusion the gram negative (-) bacteria possibilities were escherichia coli, klesiella pneumoniae, enterobacter aerogenes, proteus. This was our final lab project to identify an unknown bacteria from sample that was randomly assigned to us this video was made by me for a classroom presentation for my microbiology class. Unknown lab report unknown organism #6 ann le (phuoc) may 6, 2010 dr carrington microbiology lab- mw 12:50 le 1 i introduction my unknown organism #6 is morganella morganii, which is a gram-negative bacillus rods commonly found in the environment and also in the intestinal tracts of humans, mammals, and reptiles as a normal flora (3, 5) this.