endospore staining lab report discussion

The unknown bacteria samples for the endospore stain were taken off of a nutrient agar plate and stained using the Bartholomew and Mittwers method. In this lesson, we will focus on the individual steps of the Gram stain procedure. 1 Differential Staining for Visualization of Bacterial Cell Structures Purpose: The purpose of this lab is to take the slide we prepared in the wet mount slide with bacteria and determine whether or not we have positive or negative endospores on the cells. You are to write a 1-page Lab Report using the Scientific Method sections below. Principle: Spores have a durable outer coating that is composed of the protein keratin. For example, crystal violet is one reagent of Gram stain, and the same sputum specimen A was used for optimizing the staining time (768 s) and the stain volume (0.91.2 ml) of crystal violet. The Endospore stain is a special stain that is used to determine the presence of endospores in bacteria. Malachite green with safranin counter stain. The Endospore stain is a special stain that is used to determine the presence of endospores in bacteria. Why? Uknown Microorganism Lab Report Three of these observations were gram stains and the last observation was of an endospore staining. In 1922, Dorner published a method for staining endospores. Your Pearson report is your data to support your report. The endospore stain is a differential stain used to detect the presence, shape and location of endospore in bacterial cells. Endospore stain is used to differentiate between vegetative cells and endospores [ CITATION Mok20 \l 17417 ]. (1994). A member of the genus Bacillus, B. subtilis is rod-shaped, and has the ability to form a tough, protective endospore, allowing the organism to tolerate extreme environmental conditions (3). It requires a PRIMARY STAIN and a COUNTERSTAIN. Both bacteria were stained with malachite green, rinsed with water, and then counter-stained with safranin allowed distinct color differentiation between the endospores and vegetative cells. b. Pour off excess dye and wash gently in tap water and drain the slide against a paper towel. After staining, endospores will be 4. Dissolve 3g basic fuchsin in the mixture and add distilled water to bring the volume to 1 L. Decolorization solution : 25% Sulphuric acid; Counter stain : 0.3% methylene blue or malachite green. Abstract The primary focus of this lab was on microscopy and simple stains. After the plates were incubated and grown, the morphology was observed and recorded, and a Gram stain was performed. Sporulation is done in response to nutrient depletion (Leboffe). After staining, endospores will be 2. It has been hypothesized that multiple microbiology techniques, including microscopy, are needed to identify an unknown strain of bacteria. Take a clean, Dry, Scratch and Grease free Microscopic glass slide and place a drop of India ink or Nigrosin on it at one end near the edge. Bacteria stained with Gram stain. Quickly memorize the terms, phrases and much more. 4) Allow the film to air dry. This technique is calleddifferential staining. This keratin coat resists staining so in order to stain a spore the primary stain, malchite green, must be heated to drive the stain into the spores. Bacteria are slightly negatively charged at pH 7.0 and basic dye stains bacteria while acidic dye stains background. Look for Gram-positive and Gram-negative bacteria. In this activity, you will observe how different types of bacteria appear when stained using this technique. Name: Lab Section: Date: EXERCISE LABORATORY REPORT 9 Structural Stains (Endospore, Capsule, and Flagella) PURPOSE EXPECTED RESULTS 1. Most failed endospore stains occur because the stain was allowed to completely evaporate during the procedure. 3) Spread the sample on the slide into a thin layer. BIO 349. The principle of the role is to detect the presence or absence of the endospore, but some procedures have modified the technique by increasing the concentrations of the dyes, increasing the Primary stain : 0.3% Carbol Fuchsin Dissolve 50g phenol in 100ml ethanol (90%) or methanol(95%). There are three ways in which the Klebsiella pneumoniae is a Gram negative rod bacterium that can form a capsule. Designed By : Asem Shadid 435032467 13. Mix well the culture with dye taken on the Glass slide. K. pneumoniae can become pathogenic in patients whose immune systems are compromised. A special differential stain can be used to color the endospore and differentiate it from the vegetative cell. PLAY. The instructor informed students that each tube contained a Gram positive and Gram Negative bacteria. Figure: Bacillus subtilis endospore staining Discussion: The microorganisms were spherical in shape. 2009 Nov;Appendix 3:Appendix 3J. Gram positive rods. This lab also compares fresh versus older bacterial cultures to observe the effect of aging on the endospore stain result. Staphylococcus aureus (S. aureus) is a gram positive bacterium that when looked at under a microscope it appears to be a cluster of what looks like purple circles. The introduction to Lab Unit 05 must be written in essay form, and contain background information on the acid-fast stain, endospore stain, and fluid thioglycollate media. A medium that is rich in polysaccharides. Perform a successful spore stain to differentiate between bacterial spores and vegetative cells. Microscopy that was used were magnification, slide preparation, and staining. Flood smears with malachite green and place on top of a beaker of water sitting on a warm hot plate, allowing the preparation to steam for 2 to 3 minutes. I' am company: public works last expert custom report: endospore stain. What color are endospores after a Gram stain is performed? 1) Place a single drop of nigrosin on a microscope slide. The results indicated that B. megaterium showed green coloration on the slide, while E. coli did not. 8 pages, 3512 words. The technique regularly used to stain endospore is the Schaeffer-fulton method (Figure 6), which uses the green of the primary stain of malachite, a water-soluble stain that binds relatively weakly to cellular material and heat, to allow the stain to break through the spore bark (Figure 7). Lab Protocol: Gram Staining Yogurt Sample or Milk (raw or pasteurized). Samples must be properly prepared for microscopy. This shape is known as cocci. Lab Report about Simple Staining of Microbes. Gram staining was used as a starting point to identify the bacteria and to also confirm isolation of a pure culture of each bacterial species. Attach the Pearson report as part of your lab report results. Endospores are highly resistant to environmental A primary stain in the form of malachite green is used for staining endospores. A primary stain is forced into the spore by steaming the bacterial emulsion. True to its name, the simple stain is a very simple staining procedure involving a single solution of stain. The endospores were spherical and centrally located inside the mother cell. Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a Gram-positive, catalase-positive bacterium (2). Also look up all of these stains in your Leboffe and Pierce book.) 11 - Blot the slide and read with the oil immersion lens of the microscope. Capsule stain lab report discussion. Bacteria would appear red, the capsule clear, and the background purple. doi: 10.1002/9780471729259.mca03js15. 5 days. Gram Stain Lab Report . Procedure of Acid-Fast Stain. After staining, capsules will be cell in aln) cell. In bright field microscopy, the method of indirect staining employs liquid medium (black coloured dyes) like Nigrosin and India ink that stains the background, leaving the bacteria unstained. In an endospore stain, how would slides of 24-hour old Bacillus and 72-hour old Bacillus differ? The table shows that a gram stain, and endospore were the only test performed to the unknown bacteria W. Songwriters who is a condensed and post lab reports are interpreted. One of the first bacteria to be studied. This stain is used to detect if certain bacterium cell contain highly opposing spores within their vegetative cells. B. Pour off excess dye and wash gently in tap water and drain the slide against a paper towel. This is due Mon. The biochemical tests were chosen from the lab manual. This lipid makes the cells more durable and is commonly associated with pathogens. Any basic dye such as methylene blue, safranin, or crystal violet can be used to color the bacterial cells. Gram positive bacteria: Stain dark purple due to retaining the primary dye called Crystal Violet in the cell wall. Microbiology class lab project on differential staining of bacteria using Gram stain, Acid-fast stain and Endospore stain. The experiment setting was kept as sterile as possible when conducting the experiment. Decolorization (water) Rinse the slide under a gentle stream of water for 10-15 seconds. The theme of this lab is the identification of unknown. Study Flashcards On Micro Lab 7 Acid Fast Staining and Endospore Staining at Cram.com. 2. (1994). The acid - fast stain is performed on samples to demonstrate the characteristic of acid fastness in certain bacteria. Once the endospores are stained, they remain green. There were numerous cells with endospores, a few of which were swollen. The microbes under the microscope were drawn out and labelled. Expose the smears to Grams iodine for one minute by washing with iodine, then adding more iodine and leaving it on the smear until the minute is over. Methods from the McDonald et al. visualize and study endospores prior to and after thecounterstain. Instructions provide a thorough explanation of the lab topic, as well as detailed directions on how to complete the lab exercise. A variety of staining techniques can be used with light microscopy, including Gram staining, acid-fast staining, capsule staining, endospore staining, and flagella staining. Endospore stain results and its specific lab reports are the report test conducted in addition to. This experiment was carried out to perform staining methods on microbes, explain the mechanisms of staining, namely, simple staining, and learn how to use the microscope. Furthermore, the oxygen requirement determined that the unknown bacterium. You are to write a 1-page Lab Report using the Scientific Method sections below. However, in practice it is common to observe Gram-variable organisms. Acid fastness is a characteristic that is shared by just a few organisms so staining to determine if organisms possess this trait is useful in microbial identification schemes. Hematoxylin is a solution that stains the cell nucleus to a blue or purple hue. After staining caprules will be in a cell. Endospore staining is a differential stain that aims at detecting, identifying and differentiating an endospore from the vegetative cell (an underdeveloped endospore). BIO 310, Lab Section Professor Gonzalez-Pedrosa March 15, 2018 Title of Report: An Introductory Exposure to Endoscope Staining (Lab Report 3A) Introduction/Content Endoscope staining, another type of differential staining, is utilized to establish an understanding of the shape, arrangement, and location of the endoscope. Endospore stains, capsule stains, and flagellar stains are staining techniques that allow for the differentiation of specific bacterial structures found either inside or outside of cells. This is using oil immersion. around a - cell. Take a small portion of the bacterial colony with the help of sterilized Inoculating loop. This bacteria is a prime example for cellular development. The prelab for Lab Unit 03 must include an introduction and a procedures (materials and methods) section. 5) Observe the slide under the microscope. Like I said it was and endospore stain. The presence, and characteristic shape and position of endospores require special procedures to permeate the endospore coat. Flood the crystal violet for one minute. Bacteria capable of producing endospores do not do so uniformly during their cultures growth. This staining procedure differentiates microbes into two basic groups: Gram positive microbes and Gram negative : At Queensborough Community College, Lab 13 (Case studies in Microbiology) is not included in the manual but provided to our students as a handout in the last classthis is done so that the students can answer the questions based on what they observe in the lab rather than on prior preparation. This may involve staining, fixation, and/or cutting thin sections. Schaeffer-Dulton Technique ProcedureAfter smearing on a microscope slide, allow the bacterial sample to saturate with the malachite green solution.Then, gently heat the slide for 3-5 minutes until the dye starts to evaporate.Allow the slide to cool and wash it with water for decolorization.Finally, after counterstaining, rinse the slide.More items In such cases, scientists use a variety of stains to tell types of bacteria apart. Acid Fast Staining 5. Procedure of Spore Stain (Schaeffer-Fulton Method) Prepare smears in the usual manner using aseptic technique. The core only contains about 10 25% of water of the normal vegetative cell. The Gram Stain test was first performed to differentiate the bacteria based on the thickness of the peptidoglycan layer in its cell wall. Unknown W produced endospores. Endospore Staining Procedure for Endospore Staining Half a drop size of distilled water was placed on a slide using a dropper. In theory it should be possible to divide bacteria into two groups: Gram-positive and Gram-negative. What is the recommended seeding density for H9C2 cells (specifically in a plastic tc t25 flask)? GENERAL MICROBIOLOGY 2210: GRAM STAIN REPORT (15 PTS) ASSIGNMENT Each student will have the opportunity to submit one example of a Gram stain with a brief written report describing the staining procedure and the stain itself. Simple Staining: Colouration of microorganisms by applying single dye to a fixed smear is termed simple staining. Discussion, References included. Staining Type # 1. Pink color White color Purple color Purple color Purple color Purple color Purple color Purple color OVERVIEW. Gram Stain Test. 3. Lab Manual (1) have been used to identify the unknown bacteria. Perform a successful capsule stain to distinguish capsular material from the bacterial cell. - differential stain used to detect cells capable of retaining a primary stain when treated with an acid alcohol. It is found in the normal flora of GI tracts in humans. In early stages of sporulation, it can be seen as a clear oval in the stained vegetative cell. Heat fix the microorganisms. 2) Mix a sample of your organism to stain into the drop of nigrosin. Endospore production is a very important characteristic of some bacteria, allowing them to resist adverse environmental conditions such as desiccation, chemical exposure, extreme heat, radiation, etc. Endospores are produced by a few genera of Gram-positive bacilli such as Bacillus and Clostridium, in response to adverse environmental conditions. Unlike vegetative cell, endospore has a spore wall which prevent dyes to adhere to the wall. Take a small portion of the bacterial colony or a loopful of broth culture with the help of sterilized Inoculating loop. The procedure of capsule staining using India ink / Nigrosin method. The slide is then treated with a special stain and examined under a microscope by a trained laboratorian. If the culture is a harsh environment there would be more spores than vegetative cells. 11 - Blot the slide and read with the oil immersion lens of the microscope. K. pneumoniae can cause nosocomial urinary tract infections and pneumonia. It uses the heating process to act as a mordant as endospores have the ability to resist staining. Gram Stain Figure 5. In the Gram stain the spore is not stained. stain attached to the cells, but does rinse off the stain covering the glass. Science. Endospore Stain. The mother cells were pink in color and the endospores were green in color. Prepare bacterial smear on clean and grease free slide, using sterile technique. 13. al., Chapter 3 and about gram positive and negative cells and their cell walls in Chapter 4, especially Table 4.1. Also view and photograph bacterial smears under oil immersion. Negative staining or Indirect staining refers to a staining technique that helps us visualize various microorganisms through light and electron microscopy. 2. Describe the microscopic appearance of encapsulated Streptococcus if stained with safranin and nigrosin. The remaining bacterium was then burned off the loop. How to do an endospore stain put solution on slate, malachite green, wait 5 minutes, go over the flame, put drop of water on the slide, safranin, water, blot dry, look under oil immersion what dyes are used Such stains are sometimes referred to as special stainsor structural stains. The Gram stain is one of the most important differential staining techniques applied to bacteria and was first developed by Christian Gram in 1884. Differential staining of bacteria: endospore stain Curr Protoc Microbiol. Endospore staining is a type of special staining method, which makes use of differential staining procedure to highlight the presence or absence of endospores. Example: Staphylococcus aureus . Take a clean, Dry, Scratch and Grease free Microscopic glass slide and place a drop of India ink or Nigrosin on it at one end near the edge. Different stains have different affinities for different organisms and they are used to differentiate different types of organisms. This is the highest magnification I can get. The stain is called the Gram Stain (Figure 2.). In this activity, you will observe how different types of bacteria appear when stained using this technique. Just from $13/Page. Vegatative Thus endospores are stained green, while vegetative cells are stained red. The core contains ribosomes and centrally placed nucleoid (genetic material). A thorough rinse with water will decolorize the vegetative cells. For simple staining, only one dye is used. THE GRAM STAIN. 4. Stain the slides as follows: a. DOD the crystal violet for one minute. Discussion, References included. Designed By : Asem Shadid 435032467 13. Order Essay. Therefore, this means that Unknown B is Klebsiella pneumoniae. LAB REPORT NUMBER TWO DATE: 3/25/2010 inal attachment Lab Experiment number 11 PURPOSE: To learn the Gram stain technique, the reason for the stain, and how to identify the results of the organisms stained. The Gram stain, acid-fast stain and endospore stain each reveal distinct information about the bacteria tested. Songwriters who is an ee in constructing see how to our blog 2008 lab report. Biology questions and answers. The purpose of this lab is to stain the endospores of certain bacteria using a differential stain. A good report will likely necessitate a minimum of 2 pages double-spaced and is limited to a 3-page maximum. Free lab materials on how to preform differential stains (Gram, Acid-fast, Endospore). Essentially, endospore stain is a differential stain. These are the endospore stain images my online microbiology lab students need to observe and report on for their Lab 5 procedure. Theoretically, vegetative cells have the ability to produce inactive or dormant form endospore when they are subjected to environmental stress. endospores. Discussion. The presence of endospores must be confirmed with endospore specific stains. Key Concepts and Summary. Unlike the vegetative cells, the core protoplast is metabolically inactive. STAINING TECHNIQUES (Read about staining techniques in Tortora et. 13. Gram staining lab report. Results: Table 1 shows the monochrome and Gram Staining of Staphylococcus epidermidis and Escherichia coli. Why is the Endospore stain considered a differential stain? This is considered a differential stain because it allows you to distinguish one cell type from another (i.e. you can see their differences). These types of cells have a thick layer of peptidoglycan (cell wall) that is girded with techoic acid. This is a DIFFERENTIAL STAIN. The experiment setting was kept as sterile as possible when conducting the experiment. Materials and Methods: Refer to page 4 and 5 for staining procedures. I took this with my phone by putting it up to the eye piece. Biology. Capsule stain lab report discussion. The following are specific topics to include: Microbiology 311 Lab Report. LAB REPORT NUMBER TWO DATE: 3/25/2010 inal attachment Lab Experiment number 11 PURPOSE: To learn the Gram stain technique, the reason for the stain, and how to identify the results of the organisms stained. Acid-Fast Stain Results. Hypothesis: After performing the endospore lab, I expect to view positive endospores which would appear with a green color Understand the chemical basis for the spore and capsule stains. Sputum specimens B, C, and D were used for optimizing the variables of iodide solution, decolorant, and safranin O, respectively. Test Monochrome Staining Gram Staining Bacteria Cells Allow smear to air dry and then heat fix. HYPOTHESIS We would see red bacillus cells and green endospores. Shaeffer and Fulton modified Dorners method in 1933 to make the process faster The endospore stain is a differential stain which selectively stains bacterial endospores. Mount, negative, gram, and endospore staining; Influence of different physical conditions. Malachite green, and Safranin. Endospore Staining. Measure the abstract for discussion the lab report that sometimes the writing the discussion sample. 4. Originally named Vibrio subtilis in 1835, this organism was renamed Bacillus subtilis in 1872 (MicroWiki.com). Counterstain (safranin) Add several drops of safranin to the smear and allow it to sit for 1 minute. Example of How to Write a Microbiology Unknown Lab Report featuring Bacillus subtilis as one of the unknown bacteria. In 1883 Hans Christian Gram discovered an important differential staining method that is used extensively today. Name: Date: Lab Section LABORATORY REPORT Structural Stains (Endospore, Capsule, and Flagella) PURPOSE EXPECTED RESULTS V1. 11. Heat fix the microorganisms. The main purpose of endospore staining is to differentiate As such, it allows for the differentiation of structures and thus the characterization of a cell based on its physical and chemical nature. and A. The Gram stain procedure enables bacteria to retain color of the stains, based on the differences in the chemical and physical properties of the cell wall. Cram.com makes it easy to get the grade you want! Differential Staining 3. A small portion of agar was taken aseptically and mixed with water on slide to form a cloudy sample. How does the culture affect the results of an endospore stain? Methylene blue, a simple staining component, was used to stain the slide in order to see the different microbes and determine their cellular shape. Since unknown 37 was determined to be a Gram-positive rod, an endospore stain was also performed. Procedure of Ziehl-Neelsel stain Allow smear to air-dry, and heat fix in the usual manner. One covers the fixed smear with stain for specific period, after which this solution is washed off with water and slide blotted dry. Endospore was stained in green, and parent call was stained in red. Endospores can be found in the center of the cells or on the end of the cell. For the staining of endospores, the first article was published by Dorner in the year 1922. After determining the Gram reaction, specific biochemical tests were performed. The method of endospores staining was first proposed by Dorner in 1922 which later modified by Schaeffer and Fulton in 1933 which makes the process much easier and effective. It's an unknown bacteria and I need to find out what it is. 10/8 at 11:59 PM. Introduction. OVERALL FORMAT The Gram stain is a differential stain which allows one to classify bacteria as Gram positive or Gram negative. Properties of the lab report; research proposal; the next lab partner: lab report. Most endospore stains involve heating the slides while keeping them continually moist with the dye. The unknown bacteria appeared purple and round, therefore indicating a gram-positive cocci bacterium. Purpose: To differentiate between acid-fast and non acid-fast bacteria. That the standard lab report: discussion section is important to offer wwp alumni an outline. Gram Staining 4. Laboratory Project #2. Hematoxylin and Eosin (H&E) is the most common stain method used in a histopathology lab (Norman 2009, p.45). The suspension was then spread to form a thin film using the loop. Principle: Some bacteria contain a waxy lipid, mycolic acid, in there cell wall. Endospore stain is the fourth staining method used to add contrast. Smear the sample at the center of a clean microscope slideAllow the slide to dry (air dry) and then heat fix the smearPlace a blotting paper on the slide (cut to fit the slide) and saturate it with malachite green stain solutionMore items 11. Such a procedure does not require the use of decolorizer because malachite green binds to the cell and spore wall. The lab instructor distributed a test tube of unknown bacteria labeled 108. Endospore staining is a differential staining technique that selectively stains the spores and makes them distinguishable from the vegetative part of the cells. For a endospore stain to be successful, the temperature of the stain must be near boiling and the stain cannot dry out. and A. This experiment was carried out to perform staining methods on microbes, explain the mechanisms of staining, namely, simple staining, and learn how to use the microscope. Views. Endospore stains require heat to drive the stain into the cells. 2. The bacteria will be clear and the background will stain dark. Gram Positive Bacteria Bacillus subtilis. 1. Endospores appear as We will be performing the Gram stain and endospore staining procedures in lab, and view prepared slides that highlight some of the other cellular structures present in some bacteria. Filed Under: Reviews. The technique regularly used to stain endospore is the Schaeffer-fulton method (Figure 6), which uses the green of the primary stain of malachite, a water-soluble stain that binds relatively weakly to cellular material and heat, to allow the stain to break through the spore bark (Figure 7). Acid-Fast Stain - Purpose. Lab Report #1 Microscopy and Staining. Differential Staining of Bacterial Cells. Look for Gram-positive and Gram-negative bacteria. RESULTS Endospores Sketch your results, and label the color in each diagram. The same goes vise-versa. c. Expose the smears to Grams iodine for one minute by washing with iodine, then adding more iodine and leaving it on the smear until the minute is over. Fig: Gram positive bacteria

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