After observing the fomite and direct transmission results, you most likely observed greater growth on the last agar plate exposed to fomite contamination than the direct hand-shake agar plate. Why?
A fomes or fomite is any object or substance capable of carrying infectious organisms, such as germs or parasites, and hence transferring them from one individual to another. Skin cells, hair, clothing, and bedding are common hospital sources of contamination. Careful sterilization of such objects prevents cross-infection.
Compared to formites the hands are natural and skin cells releases enzymes and sweat from sweat glands which frequently washes the microorganism form the skin reducing the growth of microorganism apart from this enzymes are also released form skin cells which controls the bacterial growth on hand surfaces.
But as fomite are artificial things the microorganism tend to grown on higher density with no regulation in control that why a higher number of growth is seen on formite contamination.
After observing the fomite and direct transmission results, you most likely observed greater growth on the...
Results A. Effect of UV Radiation Record the results for each plate at follows (see images below): (-) no growth 1+ light growth 2+ medium growth 3+ heavy growth Also, note any differences in appearance of growth on cach of the plates. 15 30 60 ates) Bacteria Lid off UV light exposure time Lid off Lid off Lid off 15 sec 30 sec 60 sec O sec Lid on 60 sec (control) Serratia marcescens Based on these results, answer the...
When a urine culture shows greater than three different colonies on the SBA plate, no growth on the MAC plate and some growth on the CNA plate, this may be reported as? No growth at 24 hours cc > 100,000 CFU/ml Gram negative bacilli A contaminated culture Cc < 10,000 CFU/ml Gram positive bacilli Which of the following urine cultures best indicates a possible infection? Mixed culture with > 3 organisms seen < 1,000 CFU/ml >/ 100,000 CFU/ml 10 CFU/ml...
When a urine culture shows greater than three different colonies on the SBA plate, no growth on the MAC plate and some growth on the CNA plate, this may be reported as? No growth at 24 hours cc > 100,000 CFU/ml Gram negative bacilli A contaminated culture Cc < 10,000 CFU/ml Gram positive bacilli Which of the following urine cultures best indicates a possible infection? Mixed culture with > 3 organisms seen < 1,000 CFU/ml >/ 100,000 CFU/ml 10 CFU/ml...
Questions...
Background/Lab Proced
Results
Unwashed: some moderate growth
H2O only: limited to no growth
Soap and Water: limitled
Soap,Wat, Brush: moderate growth...
1.Are the results what you expected? 2. What are the type of bacteria seen in section "a" called? 3. What would you call the bacteria seen in section "d"? 4.If most of the resident and transient bacteria aren't harmful to you (after all, you are living them w getting sick), why must hands be washed before surgery? 5....
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
1. How does true motility differ from Brownian movement? 2. What could happen if you would touch the bottom of the motility agar with your needle during inoculation? 3 Explain why the following steps are essential during subculturing: a) Flaming the loop or needle prior to and after each inoculation. b) Cooling the loop or needle prior to obtaining the microorganism c) Holding the test tube caps in the hand as opposed placing them on the bench top. d) Flaming...
microbiology help
TOT Zoo Add Page Insert Table Chart Text Shape Media Comment These questions will serve in lieu of a lab report for Exercise 15, 16, and 17 You will find the answer to these questions in the background, procedure, results and interpretation sections of manual Exercise 15, 16, and 17, videos, Actions of Selective and Differential Media Chart, and the Principle/Theory article in homework section.) General Questions 1. What is the purpose (function) of selective media? (How does...
This is what we did in the experiment .First of all,1 µl of
plasmid DNA was added into the tube which contains competent cells
and the tube was tapped gently to mix DNA and the competent
bacteria. After that it was placed on ice for 30 minutes. Then, the
tube with the competent bacteria and plasmid were transferred to
heating block at 42 °C and the tube was leaved in there exactly 90
seconds. 0.25 ml of LB broth was...
Directions: There are two parts for this lab. The first part is
working with the Microscope slides. The second part is working with
media.
Task 1 – Bacteriology Survey Microscope Slides
Directions: There are eight different bacterium you need to
research.
Below is the following bacterium you need to describe and include
an image for.
• Streptococcus
• Treponema
• Neisseria gonorrhoeae
• Klebisella pneumonia
• Unstained Bacillus
• Bacillus cereus
• Clostridium tetani
• Escherichia coli
Task 2 –...
"Three organisms were innoculated on a culture media. Results showed Escherichia coli as red colonies, no growth of Staphylococcus epidermidis, and colorless colonies of Salmonella enterica. The medium is:" a selective and differential b differential c selective d minimal e heterotrophic "A bacterium was incubated with aeration in a nutrient medium containing two carbon sources. After logarithmic growth, a lag phase was observed for 25 minutes. Then logarithmic growth at a slower rate was observed. Which substate was preferred by...