BIOD171 Final Lab Notebook

procedure/s in performing aseptic transfer of bacterial cultures in (include illustration) (2) agar slant culture to agar slant

BONUS (15 points) The fallowing series of dilution was prepared from a specimen to determine the number of bacteria. There were 62 colonies on the agar plate prepared by transferring 0.3 ml from the tube number 4. Calculate the dilution factors for each tube. What is the cell concentration in the original specimen? Calculate the total number of cells in tube number 2. étv A) F12 F9 F10 F7 % & %3D delete 5 { T Y J K

Cause-and-Effect Analysis: Given the conditions below, describe the effect on the staining procedure and explain briefly: 1. Excessive heat was applied during fixation 2. Low concentration of crystal violet used during gram staining 3. Excessive washing between steps 4. Insufficient decolorization 5. Excessive counterstaining

Hello, please read the attached Microbiology question and answer the question correctly. *If you correctly answer the question, I will provide a Thumbs Up to you. Thank you.

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For a laboratory exercise of antibiotic susceptibility test in a disk-diffusion method. What are the concentrations of antibiotic applied in the test?

First page is reference for number 4-7

For laboratory exercise of Antibiotic susceptibility test in disk-diffusion method. What does an ‘I’ result mean in disk diffusion susceptibility test?

Topic: Preparation of Microbial Suspension A Pure colony is needed for inoculation in sterile water, a small portion of culture media was included. Effect:  Rationale:

A 1.5-year-old child developed vomiting, diarrhea, and fever. Stool sample were inoculated into the Endo media. After 18 hours on the surface of the medium grew medium-sized, round, slightly convex red colonies with a metallic luster. The doctor suspected Escherichia coli. 1. Name the composition of the Endo agar media. 2. Describe the properties of bacterial colonies on the Endo media.  3. What purpose differential diagnostic Endo media used for?

Sample Station 7 A. If a student performs a Gram stain on a Gram negative bacterium and stops the stain technique after the iodine step and rinse, what color would you predict the cells to be if you looked at it right now under the microscope?

Question:- Describe control strains used in the clinical microbiology laboratory and explain their maintenance in the laboratory. ( write BY WORD and all steps I need). Introduction Discussion References

Hii, can anyone help me with this. Your help would be very much appreciated, thank youuu.

Hello, please read the attached Microbiology question and answer the question and its two parts correctly. Please determine the dilution factor / final dilution based on the question. You do not have to give me a long explanation as to how you got the answers.  *If you correctly answer the question, I will provide a Thumbs Up to you. Thank you.

procedure/s in performing aseptic transfer of bacterial cultures in (include illustration) (1) broth culture to broth

Activity 2. Media Used in Isolating Coliforms You are a group of microbiologists tasked to test the presence of coliforms in the newly built water station. You are asked to isolate E. coli, Salmonella, and Shigella. Enumerate the media used for each step of isolating these bacteria. Include pictures and references. Bacteria Enrichment (Broth/Agar) Presumptive test (Broth/Agar) Isolation Media (Broth/Agar) E. coli Salmonella Shigella 1. How can you confirm that E. coli, Salmonella, and Shigella are present in the newly built water station? Explain. 2. What is the difference between nutrient broth and nutrient agar? 3. What is the importance of these steps (Enrichment, Isolation, and presumptive test) in isolating bacteria? Conclusion about the process of isolating bacteria

General Instructions:Choose 1 bacteria/diseases and fill out the details. An example of an answered template is also provided for your reference.    Causative Agent and Disease Profile for S. aureus Template and Example   ITEM MSM PROFILE   MICROBIAL PROFILE   I MICROORGANISM/CAUSATIVE AGENT Staphylococcus aureus A GRAM REACTION (+) B OXYGEN REQUIREMENT Facultative Aerobes C SIZE 1.5 µm D SHAPE Cocci in clusters E HABITAT Normal flora of skin/anterior nares/pharynx F DISCOVERY   G MICROSCOPIC IMAGE   II DISEASE PROFILE Scalded skin syndrome A DISEASE/S                        Skin and Wound Infections       Scalded Skin Syndrome Toxic Shock Syndrome Food Poisoning Pneumonia B SYMPTOMS OF THE DISEASE A high fever · Nausea and vomiting · A rash on your palms and soles that resembles a sunburn C INCUBATION PERIOD 2 and 4 hours (range 30 minutes to 8 hours) D MODE OF…

Answer the following questions based on Kirby Bauer / MacFarland standards 1-0.5 McFarland standard solution is ideally used for inoculation of plated for Kirby Bauer test. a)True b)False Principle of Kirby Bauer test is the diffusion of antibiotic agents in to Agar based media. a) True b) False

Factors which can influence antibiotic susceptibility testing (size of zone inhibition) are_________________.

The students of a Microbiology class were tasked to transfer or subculture a pure culture of Escherichia coli bacterium in five 7 mL nutrient broth and five petri dishes of nutrient agar with 20 mL capacity each. Based on the instruction bottles for nutrient broth and nutrient agar, preparation of the culture media is as follows. Nutrient broth: 8 g/liter Nutrient agar: 28 g/liter   Answer the following: a. What is the weight in grams of nutrient broth? b. What is the weight in grams of nutrient agar? c. What is the distilled water in mL for nutrient broth? d. What is the distilled water in mL for nutrient agar?

Subculture and Colony Morphology Descriptions Following identification of the Gram-negative isolate and Gram-positive isolate, you next subculture each onto fresh nutrient agar plates.  Briefly describe the subculture process in three or so sentences and what this allowed you to achieve; follow this with colony morphology descriptions of each.    Description:           Isolate A – Describe:    Colony morphology:    Medium & incubation temperature: Isolate B – Describe:    Colony morphology:    Medium & incubation temperature:

Question:- How to perform a bactericidal test bactericidal test of Dental Pulp Stem Cell (DPSC)?

If both plates were accidently incubated at 37°C, how might interpretation of the results change? Explain.

A class of 15 students (8 males and 7 females) will need to culture an unknown bacteria for a specific activity where 5 nutrient agar pates per female student and 3 agar slants per males student are needed to prepare. agarplate: 25mL Agar slant: 10mL Broth tube: 8mL Nutrient Agar: Yeast extract: 2g/L peptone: 5g/L Sodium chloride: 5g/L Agar powder: 15g/L

Escherichia coli Mycobacterium phlei Bacillus Micrococcus subtilis luteus A B Figure 1: Agar Slant Cultures of Bacteria (Gary E. Kaiser, Ph.D.- Professor of Microbiology) . Observe and describe the colour of the slant cultures (A-D) in fig 1. ( . Define the following terms: pure culture, sterile medium, inoculum, aseptic technique, and colony. What is the name of the cultures that you used . Where they gram negative or positive Define the following terms: psychrophile, mesophile, thermophile, and hyperthermophile.

answer the following questions with book reference. 1. What is meant by a bacterial “colony” or colony-forming unit? 2. Why are colonies that develop on a heavily seeded plate smaller than those that appear on a sparely seeded plate? 3. What are some of the uses and advantages of the ff.:a. Agar plateb. Agar slantc. Broth culture 4. What are the advantages and limitations of studying bacteria by means of the Culture method? 5. Why is it desirable that most cultures be inspected after 15 to 18 hours of incubation? 6. Why should culture media after inoculation be incubated at an optimal temperature immediately? 7. Describe other types of aerobic jars and anaerobic methods.

topic: BACTERIAL ENDOTOXINS TEST  Fill-in the possible effect of the procedure and give the rationale.   The sample solution prepared exceeded the MVD. Effect: Rationale:

ISOLATE #1 Results for "Isolate #1" ***Please fill out the table**** 1. Blood agar: 2. Nitrate Test: Test Results Interpretation Blood agar (type of hemolysis) Nitrate test 3. Gelatinase Activity: Gelatinase activity Resistant or Susceptible? Novobiocin Resistance Zone Diameter: 4. Novobiocin Resistance: 5. Coagulase Test: Coagulase (Sure-vue test) 1. Based on your results, what is the possible identification (Genus and species) of “Isolate #1"? I 9 10 11 12 3 14

What will pose an ethical issue in these procedures are performed - sterilization?