Term
Tempertures
Pasuerization - 63
Autoclave - 121
Control 37
Boiling water 100
Human 37
Freezing 0 or 32 |
|
Definition
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|
Term
Agar is suitable for growing
Bacteria because it doesnt consume it
Melts at 100 c and resulidifys at 45c or RT |
|
Definition
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|
Term
Handwashing
Look for a plate that has
BEFORE/AFTER
|
|
Definition
|
|
Term
Normal Flora - Organisms that live live in or on body surfaces that do not normally cause disease, but are actually beneficial. This broken down to two groups
TRANSIENT FLORA
RESIDENT FLORA |
|
Definition
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|
Term
TRANSCIENT FLORA - org. that colonize the body for short periods of time due to recent environmental exposures to fomites, other people pets, etc |
|
Definition
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|
Term
RESIDENT FLORA - kind of like a microbial fingerprint that represents well-es, lifestyle. established species that thrive in or on the body. They colonize and reporduce successfully due to a person's genetic make-up, nutrition, general health. It will re establish after disruption due to hand washing, antibiotic therapy etc because they are essentially you. |
|
Definition
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|
Term
SIGNS
Objective. Things you can see. FACT.... temperture, fever |
|
Definition
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|
Term
SYMPTOMS
Subjective -You cant see
Chest Pain, Headache |
|
Definition
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|
Term
Soaps - What makes them Effective?
If proper procedures are followed:
First wet hands, then apply soap, Next rub your hands together vigorously, rubbing all surfaces for 20seconds.
Rinse well and dry your hands. |
|
Definition
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|
Term
Plain Soaps Are:
Surfactants or Wetting agents. They remove bacteria and dirt by lowering surface tension and emulsification of fats and oils |
|
Definition
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|
Term
Why wasnt Iodine Effective?
Because of the expiration date on the bottle. |
|
Definition
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|
Term
DENTAL CARIES
Snyder Agar what does it contain?
- contains sucrose and a PH indicator called Bromcresol green.
What is Ph indicator of Snyder Agar?
Bromcresol green
|
|
Definition
|
|
Term
Degree of Change - From Green to Yellow. Depends on how many orgs, how much it will FERMENT. |
|
Definition
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|
Term
Pathogens
Cause diseases
Determined by signs and symtoms |
|
Definition
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|
Term
Opportunists
Generally non-pathogenic
very young, veryold, immunocompromised individuals, antibiotic therapy |
|
Definition
|
|
Term
Dental Caries
Org: Streptococcus mutans
love sugar, particularly sucrose
Convert enzymatically into long chains of sticky carbohydrate(dextrose)
|
|
Definition
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|
Term
Dextran
allows adhesion, colonization, biofilm, community |
|
Definition
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|
Term
Biofilm
becomes DENTAL PLAQUE
Dextran allows org to adhere, which allows colonization of the org. The colonization of this org forms BIOFILM |
|
Definition
|
|
Term
Dental caries MEDIA:
Synder agar; sucrose, ph indicator (Bromcresol green)
GREEN : GOOD
YELLOW : acidic
Value: 0-4
O= no change
4= bright yellow |
|
Definition
|
|
Term
Quadrant Streak Plates
GOAL: get isolated colonies
First step in getting pure colonies
MOST IMP STEP: 1/2 streak
Flame 1,2 quads
Quad 3,4 no flame and lazy S
Why turn dish upside down?
avoid contamination, avoid breathing into plates
condensation |
|
Definition
|
|
Term
Simple Microscope vs Light or Compound Microscope
Simple: single lens system
Compound: 2 lenses |
|
Definition
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|
Term
Magnification
make object appear larger, not better |
|
Definition
|
|
Term
Resolution
ability to see 2 objects are separate, not blurry, have distinct outlines |
|
Definition
|
|
Term
Ocular lens: binocular
Objective lens:
scanning: 4x
Low power: 10x
High Power/ high dry: 40x
Oil immersion:100x |
|
Definition
|
|
Term
Ocular is always : 10
X
Objective lens
10x100 = 1000. Best you can get |
|
Definition
|
|
Term
How does Oil Immersion work:
it reduces the amount of scattered light because it isnt bending |
|
Definition
|
|
Term
Wet Mounts; (lake, pond water)
What are the organisms:
Algae and protozoa |
|
Definition
|
|
Term
Wet Mount
Benefits -
quick, easy,
can view large eukarotic cells.
Able to see depth of field better |
|
Definition
|
|
Term
Wet Mount
CONS: drys quickly
alive so could be a hazard |
|
Definition
|
|
Term
What is Proto Slow?
Used in Wet mounts only to slow down org so it can be viewed better |
|
Definition
|
|
Term
What is a Smear?
It is a Mono Layer |
|
Definition
|
|
Term
What is the difference between plate and broth?
Only one difference. WATER |
|
Definition
|
|
Term
What is a Salt?
it is a chemical compound that is made of two parts, a positively charged part is called Cation
CATION - positively charged part
Anion - Neg. charged part
|
|
Definition
|
|
Term
What is the difference between Basic and Acid?
The CHROMOPHORE
Basic has a pos. one
Acid has a neg. one |
|
Definition
|
|
Term
How does it affect staining? |
|
Definition
|
|
Term
What dye do we use most in Lab
Basic |
|
Definition
|
|
Term
Only Acidic one we use is what?
India Ink |
|
Definition
|
|
Term
Why is India Ink Acidic?
because it has a neg. charge |
|
Definition
|
|
Term
GRAM STAIN
The best culture (age)
is at 18 to 24 hrs. |
|
Definition
|
|
Term
What Gram stain do we NEVER have in LAB?
GNC - It is rare in Nature |
|
Definition
|
|
Term
What is another name for Gram Stain?
Differential Stain - the reason it is called this is you see more than one color. You are using two different ????(dyes) |
|
Definition
|
|
Term
Gram Stain Procedures
make a smear of the desired culture, being sure very thin smear
- Place smear on the staining rack and flood w crystal violet
-Leave for 1 min.
-Rinse, shake off and go to next step quickly
-apply mordant (Gram's Iodine) for 1min
-rinse
-Decolorize w ethyl alcohel for 3-5 sec.
-Rinse off excess decolorizer
-Counterstain w safranin, leave for 2min.
rinse off for final time and allow slide to air dry fully
-View under oil immersion
Can be saved for 1 year
|
|
Definition
|
|
Term
Purpose of Each Gram Stain Step
First step Crystal violet - Primary stain.It stains all organisms
Mordant - Gram's iodine. this increase the affinity or attraction between the org. and the primary dye.
ethyl alcohol- this attempts to remove the blue color from only one group of bacteria.
Counterstain - Safranin. Any cells that lost their color with the decolorizing step are now clear and are counterstained w the additon of safranin.
IF CELLS ARE BLUE - GRAM POSITIVE
IF CELLS ARE RED - GRAM NEGATIVE
Decolorizer - eth |
|
Definition
|
|
Term
Gram Stain Procedure:
Make a smear of the desired culture. Make very thin smears.
Place the smear on rack and flood w Crystal Violet for 1min.
Rinse off excess dye using gentle stream of water. Shake off excess water
Apply Mordant - Gram iodine for 1min.
Rinse as before
Decolorize w/ethyl alcohol for 3-5 sec.
Rinse off excess decolorizer
Counterstain w safranin, leaving on for 2 minutes.
Rinse off for the final time and allow to air dry
View under oil immersion. Slides can be saved for 1 year. |
|
Definition
|
|
Term
What is the structure being stained in a GRAM STAIN?
The structure imparting color is the cell well |
|
Definition
|
|
Term
Why are Gram Pos and Gram Neg different colors
due to chemical differences in the structure of the bacterial cell wall.
What is the Best age of culture is ?
18-24 hrs |
|
Definition
|
|
Term
Differences shown by the Gram stain are:
Gram neg. -
wall contains alcohol soluble lipids
Producer of endotoxin
Lipid A - need to give a slow dosage or endotoxin will be released and pt will go into shockk
sensitive to tetracycling
GRAM POS. lacks the lipids and retains crystal violet-iodine complex used
Produces exotoxins
susceptible to certain antibiotics and phenol disinfectants |
|
Definition
|
|
Term
Basic dye what colors will be what?
Background Clear
Org. colored |
|
Definition
|
|
Term
Acidic Dyes what will be colored what?
Background color
Org. clear |
|
Definition
|
|
Term
Negative Stain
ACCP
Acidic stain
clear cell
colored background
Push smear
NO HEAT FIXING
|
|
Definition
|
|
Term
Negative Stain
Advantages:
No heat, better look at size and shapes
faster than simple,smear and staining done in one step
Disadvantages :
Because no heat fix potentially dangerous |
|
Definition
|
|
Term
What is a NB made with:?
water based, yeast extract, NaC1, beef pepton, phbuffer,
|
|
Definition
|
|
Term
If you see Malachite Green what stain is she referring too?
Schaeffer Fulton Enpospore Stain |
|
Definition
|
|
Term
If she puts out Ethyl Alcohl which stain did we use this on?
Gram Stain |
|
Definition
|
|
Term
What orgs were used in Acid Fast?
Mycobacterium smegmatis
micrococcus luteus |
|
Definition
|
|
Term
What orgs were used in Endospore Stain?
Bacillus subtilis
old and new
old - 3days
young 24-48 |
|
Definition
|
|
Term
What are the two org that endospores are made from?
Bacillus and Clostridium |
|
Definition
|
|
Term
What are procedures for Endospore?
Stain: Malachite green
Decolorizer: water
Counterstain : Safranin
What is purpose?
to differentiate between orgs that can produce endospores and those that cant |
|
Definition
|
|
Term
Endosopore procedures
Use steam heat to allow the primary stain to penetrate the thick spore coat.
Water for decolorizer
Safrain used to color the vegetative cells |
|
Definition
|
|
Term
Why do we have to use special Stains on the Acid Fast?
Because of the thick waxy coat is resistant and impervious to decolorizing agents. so you cook in primary stain. THen the acid alcohol will strip the the primary dye from the non acid fast cellsl of the primary dye, carbolfuchsin BUT. will not penetrate the AFB. Then the Non acid fast org are counterstained w methylene blue so they can be seen under OI |
|
Definition
|
|
Term
What color will the Non acid org be?
Blue |
|
Definition
|
|
Term
What color will the acid fast orgs be>
PINK |
|
Definition
|
|
Term
What is one of the Most Imp. environmental org from Bacillus(endospore)
is B.anthracis
B.cereus also causes problems as a food pathogen
Clostridium contains some of the worst pathogen known to humans like Tentanus,botulism |
|
Definition
|
|
Term
What is NB made out of?
water based, yeast extract, beef peptone, NaCI,ph buffer |
|
Definition
|
|
Term
What is NAP made out of ?
same as NB, just add agar |
|
Definition
|
|
Term
What color will org be on Endospore Stain?
Endo - Green
Veg - Red
green and red - sporalation phase |
|
Definition
|
|
Term
What is microbial growth?
relates to an increase in the number of cells rather than in the size of individual cells |
|
Definition
|
|
Term
What is Macroscopic growth?
Is big enough to be seen or examined by the naked eye |
|
Definition
|
|
Term
How are Broths asset?
check for pellet - on bottom
check for pelicle on top
then resuspend
then one inch from paper |
|
Definition
|
|
Term
why is Ethyol Alcolyl critical step on a Gram Stain?
has too do w mono layer - some are thicker so would call for longer Ethyol Alcohol time |
|
Definition
|
|
Term
Trouble shooting for Gram Stains
Org is not blue enough???
Inc. the timing of the primary dye, crystal violet
or Iodine not left on long enough |
|
Definition
|
|
Term
Gram Positive orgs appear negative?
over decolorizing on alcohl step. Decrease the time |
|
Definition
|
|
Term
Gram neg appear gram Pos.?
Under - decolorzing. This usually happens when smears are too thick. You can try decolorzing longer but best thing is too make new smear |
|
Definition
|
|
Term
Orgs are not red eough and are very difficult to see?
Safranin not lft on long enough. inc the time on safranin |
|
Definition
|
|
Term
Org stains unevened on a gram stain due to the state of the cell wall? Why?
Org are too old, young or are sporulating |
|
Definition
|
|
Term
If it is not a baccillus or cocci what is it?
Most likely, GNR |
|
Definition
|
|
Term
What is Parocal ?
This is the quality of the microscope that allows you to change obj. lenses w/o greatly altering the focus.
EQUAL FOCUS |
|
Definition
|
|
Term
What is Depth of field?
as one layer is being veiwed, other layers fade out and get blurry. |
|
Definition
|
|
Term
Refractive Index?
the degree that light bends is indicated by the refractive index.
Refractive index and OI is the same as glass |
|
Definition
|
|
Term
Working distance?
space between glass slide and the objective lens in position |
|
Definition
|
|
Term
Base and Body of m.scope?
Supports all of the working parts |
|
Definition
|
|
Term
Arm? what is purpose
to connect the base to the part of scope that houses the various lenses. Used to grab scope to move from oneplace to another. |
|
Definition
|
|
Term
Lamp
Provides illumination |
|
Definition
|
|
Term
Voltage Regulator
Used to vary the voltage going to the lamp |
|
Definition
|
|
Term
What is Menisus?
Causes a concave
and adheres to side of the tubes
|
|
Definition
|
|
Term
Oil Immersion -
light passes through oil directly into galss objective lens, little light escapes after entering the condenser. Refractive Index of immersion oil is same as glass. |
|
Definition
|
|
Term
How do you Adjust light on scope?
Iris deaphragm
Condesnser,
Voltage regulator |
|
Definition
|
|
Term
Rule of Agar
Not a good food source, that is why not a good media
hardens at 100c and resolidifys at 45c |
|
Definition
|
|
Term
When did we use Methyl Cellulose?
That is same as Proto-Slo and was used only on Wet Mounts
|
|
Definition
|
|
Term
What was the result in class on the Environmental Culture?
NG would be found where metals, credit cards cuz they dont support growth. |
|
Definition
|
|
Term
Bacterial Population Counts:
SPC - counts what??
only viable organisms are counted
Direct microscopic Counts -
both dead and alive are counted
Turbidometric methods - both dead and alive |
|
Definition
|
|
Term
Invisiable Killer Movie
Stachybotrys toxic Mold(Black mold)
grows due to water damage
causes brain damage,seizures, brain fogginess
equalibruim off, vomiting diahreea |
|
Definition
|
|
Term
Group B Strep
Common Bacteria found in intestines if passed to baby it will dye.
Causes brain damage. Mental Retardation.1/3 of women carry it. 1-2% will get it.
Prevention is simple if antibodics during labor or test whil preganet. |
|
Definition
|
|
Term
Transverse Mylitis
34,000 cases in this county
couldnt breath, couldnt feel limbs
paralze
are syndrome that hits the spinal cord and |
|
Definition
|
|
Term
Hemolytic Uremic Syndrome
E. coli from well water
Attacks internal organs
attacks liver, kidneys brain,
You can find E coli anywhere
Little girls that died |
|
Definition
|
|
Term
Capsule Stain
It is a combo of NEgative stain and the Simple Stain |
|
Definition
|
|
Term
Capsule Stain
Org used: Klebsiella Pneumoniae,Bacillus megaterium or Saccharomyces cerevisiae
|
|
Definition
|
|
Term
Capsule Stain
Stains used:
Primary dye: India ink (used for Push Smear)
Decolorizer: 0.1NHC1
Counterstain: Safranin
Background will be brown
Capsule will be clear w/pink in center(that is the vegetative cell) |
|
Definition
|
|
Term
What is the Bacterial Capsule called?
Termed Glycocalyx |
|
Definition
|
|
Term
What is the purpose of the bacterial Capsule?
gives an addl layer of protection to the cell
It resists being engulf by white blood cell |
|
Definition
|
|
Term
What are capsules made of?
mucoid polysaccharides or gelantinous polypeptides. |
|
Definition
|
|
Term
Quanatative means
The actual counted growth |
|
Definition
|
|
Term
Why will capsule stain sensitive to heat?
because the normal heat fix step of smear preparation. it would cause some non encapsulated cells to shrink, leaving holes in the stain that appear to be capsules. But if you dont heat the org will wash off the slide during the dying process. |
|
Definition
|
|
Term
Capsule stain 2 genera that produces capsule:: Streptococcus pnemonia
Klebsiella pneumonia
How does this stain work? It has 2 different stains, neg and simple
Orgs used:Klebsiella pneumoniae
bacillus megatridium
saccharomyces cerevisiae
Capsule Stain Procedure
Make a push smear
add a drop of india ink to the slide
mix in a small part of a colony
or 2 loopfuls from a broth into the India Ink
MIX gently
push smear
allow to dry
flood smear for 30 sec. w 0.1.NHC1
Pour off excess acid and air dry again
Counterstain w/ safranin for 1min
rinse safranin w tap water
Air Dry
view under OI
|
|
Definition
|
|
Term
What are the results of a Capsule Stain?
Red colored rods(K.pneumoniae or B megaterium or S.cerevisiae)
The Red color is the vegetative cell.
Clear area around the colored cells indicate the capsule. seen against a red or BLUE background. |
|
Definition
|
|
Term
qualitative evaluation -
You look at it and say NG or Growth
amount of microbial growth in our lab media, estimating turbidity in broths. |
|
Definition
|
|
Term
Colony forming units CFU- Why use to know this term?
Since it is impossible if a colony formed from a single cell, or from a number of cells clumped together, it is more accurate and generally accepted in industry to use the notation CFU |
|
Definition
|
|
Term
Characteristics and requirements of each Gram type
GRAM - wall contains alcohol-soluble lipids
producers of endotoxins
Sensitive to tetracycling antibiotics
aminoglycoside antibiotics
Susceptible to chlorine,detergent,iodine,
Lipid A: endotoxemia - need to give a slow dosage, Endotoxins released into blood, shock
GRAM+ lacks the lipids and retains crystal violet-iodine complex used.
Producers of exotoxins
susceptible to certain antibiotics and phenol disinfectants
|
|
Definition
|
|
Term
What is a subculture?
making org from original primary plate or broth |
|
Definition
|
|
Term
Acid Fast Stain
Ziehl-Neelson stain
Mycobacterium: Thick waxy; coat exterior(lipoidal coat-mycolic acid) extremely resistant to most decolorizing agents
Dual Smear: two bacterial species on one side
quality control
Result:Acid-Fast-Bacilli: Bright fushsia pink
Non Acid - BLue |
|
Definition
|
|
Term
Special Stains:
Flagella, endospores,capsules, |
|
Definition
|
|
Term
Schaeffer Fulton Endospore Stain
Org used: Bacillus subtilis
Purpose: to differentiate between org that can produce endosportes and those that cant.
IT TESTS for tetanus, botulis
Thick: outer coat: cell wall material, calcium diplocholinate,Kertain
Stains used. Malachite Green,decol: water and counter: safranin |
|
Definition
|
|
Term
Is Algae motile or non motile?
Non-motile |
|
Definition
|
|
Term
Is protozoa motile or non??
Motile |
|
Definition
|
|
Term
Tell me all you know about B subtilis |
|
Definition
|
|
Term
Requirements for Microbial Growth
Nutrional reg.
CAP
HC
Carbon - most essential element for life on earth
Autotrophs - can fix carbon fromCO2 found in the atmosphere, which is inorganic.
Heterotrophs must obtain their carbon from organic and sources such as meat and veggies
Energy source - to survive, all orgs must be agble to produce energy (ATP) on a daily basis. Some org are phototrophs, meaning they use radiant sunlight for their energy source. These are rare, most org energy is obtained from a chemical source in the media in the form of Carbs or amino acids. These orgs are called Chemotrophs, which are by far and away, the most abudant life forms on earth. |
|
Definition
|
|
Term
Nutrional Requirements contd
Growth factors - these factors are specific ing.that must be included in lab media like amino acids, vit.,blood cell, components or materials the orgs. are unable to produce on its own
Minerals - elements like sodium,potassium, calcium,magnesium,iron,zinc,copper, phosphorous and cobalt. they are neccessary for cellular metabolism by aiding in enzyme structure and function.
Nitrogen - essential in the composition of proteins and nucleic acids.
Vitamins -
water -Since water makes up about 70-85% of a cell, it must be provided in all lab media.Tap water is never used cuz it contains excess calcium/magnesium ions. Distilled water is used |
|
Definition
|
|
Term
What is Agar made of??
Agar is a polysaccharide derived from marine algae(a seaweed called RHODOPHYTA. This is used to thicken media to the desired consistency. |
|
Definition
|
|
Term
Physical Req.
Ph of the media - greatly affects metabolic enzyme activity.Most org like it around neutral or 7. A change in either direction if too drastic, usually harms the org, sometimes fatal.
Lab media is generally in neutral range which suffices for most microbial growth fungi being a notable exception |
|
Definition
|
|
Term
Types of Respiration:
Aerobic
Anaerobic
Facultative
Microaerophilic
|
|
Definition
|
|
Term
What is Saprophytic?
Break down dead organic matter vs parisite |
|
Definition
|
|
Term
what do you know about Bacillus subtilus
Known as Hay or grass bacillus
Is Gram Positive
Found in Soil
Rod-shaped
Is a Obligate aerobe
Is not a human pathogen |
|
Definition
|
|
Term
Streptococcus Mutans
Gram Positive
Facultative anaerobic
Found in Human oral cavity
Contributor to tooth decay |
|
Definition
|
|
Term
Mycobacterium smegmatis
Generally considered a non pathogen
GPR
non motile
Used in Acid fast stain
|
|
Definition
|
|
Term
Staphylococcus Aureus
Gram Positive Coccus
Facultative anaerobic
Appears as grape like clusters
Most common cause of staph infections
Found in the skin, nose and throat
It can cause a wide range of illnesses from pimples, boils to life threating like pneumonia, meningitis
Growth pattern = look at notes
|
|
Definition
|
|
Term
Micrococcus luteus
Gram Positive
Found in many places in the environment, water, soil, dust.
Most are mesophiles
It can be a Opportunistic pathogen |
|
Definition
|
|
Term
Bacillus megaterium
Rod shaped
Gram Positive
Found in Soil
Can survive in extreme conditions such as desert environments.
Is used to make Penicillin |
|
Definition
|
|
Term
Streptococcus Lactis
Gram Positive
Found as a contaminant in milk, dairy products
Common cause of Souring and coagulation |
|
Definition
|
|
Term
Pseudomonas Fluorescens
Gram Negative
Rod Shaped
Has multiple flagella
Found in Soil and water
Obligate Aerobe
Green
You smell it on Patients, smells like Tortilla |
|
Definition
|
|
Term
E. Coli
Gram neg. rod
haloduric
saccrophilic
Find in the bowel |
|
Definition
|
|
Term
2 ways to get a Isolated Culture
QSP
Pour plates |
|
Definition
|
|
Term
What is an A jar called
Anaerogen anaerobic Jar
What is the environment in the A jar?
removal of free 02 produces anaerobic conditions w/in the jar |
|
Definition
|
|
Term
WHAT IS THE indicator for the A jar?
methylane blue
if it is blue it means that there is oxy if clear no oxy.
So if blue data not valid |
|
Definition
|
|
Term
3 experiments we used Methylene Blue
Acid
Simple
AJar |
|
Definition
|
|
Term
What are the char. of S.cervesciae
dull, creamy,mounted macroscopic growth
Yeast grown on SAB
Saccrophilic
Acidophilic
|
|
Definition
|
|
Term
How do you inculate a Slant
Lazy S toward the top
|
|
Definition
|
|
Term
How does a Bacterial cell repair itself?
endonuclease- snips out the faulty dimers.
DNA polymerase - brings in new pairs
DNA ligase - seals it up |
|
Definition
|
|
Term
Agar Deep
Same as a plate but in a Tube |
|
Definition
|
|
Term
What is titer?
A measure of antibody level in a patient, determined by agglutination method |
|
Definition
|
|
Term
What is Sabourand Dextrose Agar ?
What are some of their unique characteristics?
It is a special selective media used w/ fungi
Has a PH of 5.6 and increased sugar concentration.
It works well since Fungi are both acidophilic and saccharophilic, this medium works weel to encourage growth while inhibiting most bacteria
How does SAB inhibit the growth of unwanted Bacterial species?
It is acidic and has a high sugar concentration |
|
Definition
|
|
Term
What are some characteristics of YEAST?
Dull, mounted and creamy |
|
Definition
|
|
Term
What are some characteristics of Bacteria?
Flat and shiny |
|
Definition
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Term
Disinfectant
you can only use on any surface that is not alive |
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Antiseptic
Used on live tissues but not meant to be taken in |
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Chemotherapy
meant to be taken into the body
2 subgroups - antibodic made from nature
synthetic - made in Lab |
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Definition
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Term
Broad
can kill pos. and neg gram |
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Definition
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Narrow
can kill all one like all Gram pos or all Gram ng. |
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Definition
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Term
Why would you prescribe a Intermiade antibodic vs. Sensitive??
Pt. too weak to take
more cost effective
Pt allergic |
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Definition
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Term
Describe Confluent Lawn Pattern
down, side, horizontal and around |
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Definition
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Term
In what experiment did we use the Agar Diffusion Method?
Chemical Control Agents |
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Definition
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Term
What organism were used in the
Chemical Control agents
BES
Staph. aureus(GPC)
E.coli (GNR)
Bacillus megaterium(GPR) |
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Definition
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Term
Zone of Inhibition
Clear are of no growth around a specific disc |
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Definition
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Term
What does the Zone of Inhibition tell us about the agent?
if it is effective
if the org. is sensitive |
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Definition
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How do you determine the kind of Effect? cidal or static?
You subculture from zones to NB
If org grow right up to the edge of disc then it is?
Resistant and a subculture would not be neccessary in this case |
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Definition
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Term
In Chemical Control why can you only say R and S?
Because we did not measure, this is not standarized |
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Definition
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Term
Name 10 things on KB?
Confluent lawn
mueller hinton plate
spacing, pre-labeling
18-24
0.4mm agar deep
incubation 37 + 0.1 oC |
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Definition
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What do you know about Seratia marcescens?
It is a luxary enzyme
In good condition more pink
less will get clear
In past was not a pathogen and used to test air currents
But known to be a pathogen in some cases
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Definition
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What is the plate called we used in KB?
Mueller Hinton Plate |
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Definition
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Term
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Definition
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Term
Name 4 ways that KB is standardized?
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Definition
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Term
Trichothecium
It will be blue and cigars will have a split or divide |
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Definition
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Term
What is a reason why we would Subculture?
because you want a pure culture
You want more because you need more |
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Definition
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Term
How does the env. created in the Ajar differ from that of a candle jar?
CJar has small amount of o2, increased CO2 and CO
Ajar removal of free O2 produces anerobic conditions w/in the jar |
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Definition
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Define Capneic?
grows better in CO2 under conditions of increased Carbon dioxide in the atmosphere because as humnas we carry CO2, we convert OXy into CO2 |
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Definition
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Term
What is Resazurin?
It is a oxy. indicator for Thios broth |
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Definition
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Term
What color is Resazurin when oxygenated?
Red/Pink |
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Definition
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Term
Resazurin when anaerobic?
CLEAR |
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Definition
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Term
What is the oxy indicator for Cjar and Ajar
Methylene Blue |
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Definition
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Term
What are the two components that make up the endospores thick outer coat?
Keratin
Calcium diplocolinate |
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Definition
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Term
What are the orgs we used in the smear prep
SA
B.cereus
E. coli |
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Definition
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Term
What is most common media for Fungi?
Sabouraud Dextroseagar
Why
Since fungi are both acidophilic and saccharophic, this medium works well to encourage their growth while inhibiting bacterial species |
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Definition
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Term
How does heat control microbial growth
By denaturing proteins and damaging cell membranes and other internal components |
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Definition
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Term
What is the difference in the procedure between making a smear of an org from a broth versus Solid media?
Procedures are the same except you add a drop of water to the slide before putting on the org
Reason is it helps emulsify the org that is most likey chunky or sticky |
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Definition
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Term
What kind dye is best for staining a bacterial slide?
Basic dye - because bacteria contain a neg charge, so you need a dye that has the opposite charge |
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Definition
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Term
Name 3 types of special Methods we will use to mimic the different atmospheric conditions.
Thioglycollate broths
candle jars
Anaerogen anaerobic jar |
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Definition
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Term
Why is it important not to shake the Thio?
It may disrupt the oxygen gradient |
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Definition
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Term
In the Osmotic Pressure exp. we used a GRADIENT PLATE. What is that?
Is a double layered agar plate w/ concentration gradient of a particular solute in the bottom layer of the agar.
Why? to give the effect of a hypertonic environment |
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Definition
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How does PH affect an org?
it has one of the greatest influences.All orgs have a prefered ph, where they grow best. But if you go out of the range it is equally as damaging |
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Definition
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Term
What is the environment of a C jar?
has a small amount of O2, increased CO2 and CO |
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Definition
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Term
What is purpose of an Agar Slant?
are very helpful for observation of surface growth
and can be saved for a long time |
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Definition
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Define Serial Dilution
a way to arrive at a desired concentration. It is a stepwise dilution of a substance in a solution. |
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Definition
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Term
List the steps of KB procedure that are standardized
confluent Lawn
mueller hinton agar
spacing of disc
time 16-18hr
age of culture 18-24
ph 7.2-7.4 |
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Definition
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Term
Thio indicator
resazurin
Red - if oxy present |
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Definition
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Term
Staphylococcus Aureus
How does org grow in NB?? What is the Growth pattern?
like a tornado |
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Definition
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Term
UV - What repairs dna in bacteria
Enzymes
Endonucleases- snip out faulty dimers
DNA polymeracse brings in new pairs
Dna ligase - seals it up |
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Definition
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Term
what is the differene between bacteria and yeast?
Eukarotic, |
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Definition
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What are the difference between KB and Chemical control
subculture
KB is standardized |
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Definition
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Term
Dirt or soil is gram
liquid is ml
CFU per gram
CFU per ml |
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Definition
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Term
Sample of an Antibodic
and synthetic
Pencillin
sulfa |
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Definition
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Term
Growth pattern for Semi Solid
motile will look like xmas tree or just a few dots
non motile - just see growth down the middle of the TB. not on the sides |
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Definition
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Term
Tell me about Klebsiella pneumoniae
Gram-negative,
non-motile,
encapsulated,
lactose fermenting,
facultative anaerobic,
rod shaped bacterium
found in the normal flora of the mouth, skin, and intestines. |
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Definition
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Term
Serratia marcescens
Gram-negative,
rod-shaped bacterium .
A human pathogen,
, urinary tract infections
wound infections,[1][2] and is responsible for 1.4% of nosocomial bacteremia cases in the United States.[3] It is commonly found in the respiratory and urinary tracts of hospitalized adults and in the gastrointestinal system of childrenS |
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Definition
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Term
What are some Environmental factors that influence the growth of microorganism?
Temp
osmotic presure
ph
UV |
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Definition
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Term
Bacterial Population Count
was org was used??
E. coli |
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Definition
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Term
Anaerobic Cultures
What org were used
MESC
Micrococcus luteus
staphylococcus aureus
escherichia coli
clostridium sporogenes |
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Definition
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Term
Chemical Control what orgs were used:
BES
Bacillius megaterium
Escherichia coli
staphylococcus aureus |
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Definition
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Term
KB what orgs are used?
ESSP
ecoli
stahphylococcus aureus
s.marcescen
Pseudomonas aeruginosa
Pseudomonas aeruginosa
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Definition
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Term
What orgs do we use in Moist heat
BBEM
Bacillus subtilis
Bacillus endospore
e. coli
mycobacterium smegmatis |
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Definition
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Term
What orgs in Temp.
PSB
pseudomonas aeruginosa
streptocoocus lactis
bacillus stearothermophilus |
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Definition
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Term
What orgs in PH
EASS
ecoli
alcaligenes faecalis
saccharomyces cerevisiae
staphylococcus aureus |
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Definition
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Term
What orgs in Semi Solid media?
PS
proteus mirabilis
staphylococcus epiderimidis |
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Definition
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Term
What org in Hanging Drop?
MP
Micrococcus luteus
pseudomonas aeroginosa |
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Definition
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Term
What is another name for Acid fast stain?
It is a dual stain |
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Definition
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