MICROBIOLOGY Flashcards
WHAT ARE THE SECTIONS OF MICROBIOLOGY?
Bacteriology, Mycology,
Mycobacteriology, Virology and Parasitology
HOW MANY SECTION ARE THERE IN MICROBIOLOGY?
5
It can accept various samples for detection and
isolation of clinically significant microorganisms
involved in disease.
MICROBIOLOGY
WHAT ARE THE MICROBIOLOGY’S ROLE?
• Detect
• Identify
• Isolate
• Eradicate
TWO WAYS TO SEE THE ORGANISM
1.using 1000 power magnification
2.grow those organisms and bacteria don’t grow in
size, they grow in number and they
grow exponentially over a period of 6 to
8hrs
WHAT ARE THE ROUTINE CLINICAL LABORATORY
EXAMINATIONS IN MICROBILOGY?
1.CULTURE AND SENSITIVITY OF
CLINICAL SAMPLES
2. ACID FAST STAIN
3. GRAM’S STAIN
4. ENVIRONMENTAL SAMPLE
5. WATER ANALYSIS
6. FOOD BACTERIOLOGY
term used when microbe such
as bacteria and fungi are unable to grow in the
presence of one or more antimicrobial drugs.
SUSCEPTIBILITY
performed on bacteria or fungi causing an individual’s infection after they have been recovered in a culture of the specimen.
Susceptibility
a method of multiplying
microbial organisms by letting them
reproduce in predetermined culture
media
microbiological culture or microbial
culture
“Find the cause, is it bacteria?”
Culture
It is made up nutrients that will help the
microorganisms grow para makita sila.
What are examples of this?
Culture
Fungal and Bacteria
it is only in special laboratory under
controlled laboratory conditions.
viral culture
“What medicine should be
prescribed?”
Sensitivity
microbiologists will use the bacterial
culture and test it against a panel of
antibiotics. Para malaman kung san
pwedeng mamatay ung bacteria na
naisolate na probable causative agent ng
disease ng patient.
Sensitivity
detects organism called acid fast
bacteria
- It is a laboratory test that determines if a
sample of tissue, blood, or other body
substance is infected with the bacteria
that causes tuberculosis (TB) and other
illnesses.
ACID FAST STAIN
causes tuberculosis
Microbacterium tuberculosis
most common type of TUBERCOLOSIS
Pulmonary tuberculosis (PTB)
is a test that checks for bacteria at the
site of a suspected infection such as the
throat, lungs, genitals, or in skin
wounds.
GRAM’S STAIN
In grams stain what is the color or POSITIVE AND NEGATIVE?
Positive-Purple
Negative-Red
devise the method of staining for
bacteria.
Hans Christian Gram
states what antibiotic should be given.
Positive and negative gram stains
ENVIRONMENTAL SAMPLE
ANALYSIS / Microbial load of Environment.
Done for monitoring purposes, as well as for
research. Data may be collected to
monitor air and water effluents or to
characterize pollutant levels in
environmental media (air, water, soil,
biota).
Infection that patients get when the surroundings is contaminated.
Post operative infection
-Pathogenic occurence in water
- Potability of water
- Bacterial count and growth in water.
WATER ANALYSIS
test for coatability of water
WATER ANALYSIS
to bottle water and filter water
WATER ANALYSIS
Analysis of the causative in mass food poisoning
- For food poisoning causes
- collect and test sample of food to find out the reason.
FOOD BACTERIOLOGY
Method multiplying microbial
organisms by letting them reproduce.
CULTURE
bacteria can be grown by isolation
CULTURE
By appropriate procedures, they have to be grown separately (isolated) on culture media and obtained as pure for study.
CULTURE
The original media used by?
What did he use?
Louis Pasteur
2 TYPES OF MEDIUM, DEFINE EACH
Liquid Medium
- Diffuse growth
Solid Medium
- Discrete colonies
macroscopically visible collection of
millions of bacteria originating from a single bacteria cell
Colony
Earliest Solid Medium
Cooked cut potato by Robert Koch
Not satisfactory. Because it liquefy at 24℃
Gelatin
What temperature does gelatin liquify?
24℃
Who made Agar?
Frau Hesse
Used for preparing solid medium
- Obtained from seaweeds
- No nutritive value
- Not affected by the growth of the
bacteria
- Melts at 98℃ and sets at 42℃
Agar
What temperature does agar SETS AND LIQUIFY?
Melts at 98℃ and sets at 42℃
Percent of agar that is employed in solid medium
2%
WHAT ARE THE CRITERIA FOR BACTERIA GROWTH?
NUTRITIONAL REQUIREMENTS
TIME
TEMPERATURE
ATMOSPHERIC CONDITION
How many hours does bacteria grow? Give the ensured time and day as well.
24hrs
96hrs up to 4 days to ensure.
TEMPERATURE OF NEEDED BY BACTERIA TO GROW
35-37 degrees
it is an enteric pathogen and its
grown at 42 degrees
Campylobacter
the most agar plate we
use is sheep
BLOOD AGAR
It has all the amino acids and
nutritional requirements that bacteria need.
BLOOD AGAR
WHAT ARE CULTURE METHODS?
● Streak culture
● Lawn culture
● Stroke Culture
● Stab culture
● Pour plate method
● Liquid culture
● Anaerobic culture methods
-Provides a uniform surface growth of the bacterium.
- also known as susceptibility or
sensitivity testing
LAWN CULTURE
WHAT ARE THE USES OF LAWN CULTURE?
- For bacteriophage typing.
- Antibiotic sensitivity testing.
- In the preparation of bacterial antigens
and vaccines. - Lawn cultures are prepared by flooding
the surface of the plate with a liquid
suspension of bacterium
-Fairly soft and are useful in
demonstrating bacterial motility
WHAT ARE TYPES OF CULTURE MEDIA?
- BASED ON CONSISTENCY
- BASED ON CONSTITUENT
- BASED ON
-2-3% concentration
-It melts at 95°C and solidifies
at 42℃
-Doesn’t contribute any
nutritive property
Solid Medium
Example of Solid Medium
Agar
- No Agar
- Does not make colony
Liquid
-0.5%-1.5% Agar content
Used for detection in bacteria on
whether its motile or not
Semi-Solid
gumagalaw. Due to having
flagella
Motile
- di gumagalaw. Walang
flagella
Non motile
It’s a
general-purpose media that
supports the growth of
non-fastidious microbes, and it
is primarily used for the
isolation of microorganisms.
Simple Medium
What are the Basic components of Simple Medium?
What are examples of Simple Medium?
Basic components: protein
source, peptone source, milk
extract, acelyne, agar
- Examples: are nutrient broth,
peptone water, and nutrient agar
Special Nutrients.
These are media containing nutrients in unknown quantities that are added to bring about a particular characteristic of a microbial strain
Give examples
Complex media
Examples are tryptic soy broth,
blood agar, and nutrient broth.
It is a type of chemically
defined media and is produced
from pure chemical substances
Synthetic Media
A defined media refers to a
medium having a known
concentration of ingredients,
like sugar (glucose or glycerol)
Synthetic Media
from pure chemical substances
with its exact composition
known.
Synthetic Media
It is a type of chemically
defined media and is produced
from pure chemical substances.
A defined media refers to a
a medium having a known
the concentration of ingredients,
like sugar (glucose or glycerol)
and nitrogen sources (such as
ammonium salt or nitrate as
inorganic nitrogen).
- from pure chemical substances
with its exact composition
known.
Synthetic Media
Substances that are added to
enhance the growth
Special Media
There are substances added like blood ,serum , egg that are used by
bacteria to provide nutritionally
means especially for the
fastidious bacteria
Enriched media
Substances that are added to
enhance the growth.
- Enriched media. There are
substances added like blood
,serum , egg that are used by
bacteria to provide nutritional
means especially for the
fastidious bacteria
Give examples
Special Media
Ex. Sheep’s blood agar = may
dugo ng tupa
-This media is prepared by adding
additional substances like blood, serum, or egg yolk in the basal medium. It’s used to grow fastidious microorganisms
as they require additional nutrients and growth-promoting substances.
ENRICHED MEDIA
-It is a liquid medium which selectively favors the growth of certain pathogenic bacteria and inhibits commensal bacteria.
ENRICHMENT MEDIUM
This media allows the growth of certain microbes while inhibiting the growth of others. It’s an agar-based medium that is used to isolate microorganisms in labs.
SELECTIVE MEDIA
An indicator is included in the
medium. A particular organism
causes change in the indicator, e.g. blood, neutral red, tellurite.
Give example
INDICATOR MEDIA
Examples: Blood agar and
MacConkey agar are indicator
media.
- contain compounds that allow groups of microorganisms to be visually distinguished by the appearance of the colony or the surrounding media, usually on the basis of some biochemical difference between the two
groups.
DIFFERENTIAL MEDIA
- help in the identification of bacteria. The term sugar in microbiology denotes any fermentable substance. Glucose, lactose,
sucrose and mannitol routinely employed for fermentation tests.
SUGAR MEDIA
These media are used when
specie-men cannot be cultured
soon after collection. Bacteria to
be transported to the lab.
Give examples
TRANSPORT MEDIA
Examples: Cary-Blair medium,
Amie medium, Stuart medium.
can be used to grow Halophiles.
It is both a selective and
differential media. It uses salt as
the selective agent and a pH
indicator of sugar fermentation
to differentiate species
MANITOL SALT AGAR (MSA)
Requires with oxygen environment in order to grow aerobic bacteria.
AEROBIC MEDIA