CULTURE & CULTURE MEDIA Flashcards
Pathogens in Gastrointestinal tract
SALMONELLA & SHIGELLA
lactose fermenters, and non-lactose
fermenters
MacConkey
hemolytic patterns
(streptococci)
BAP (Blood Agar Plate) -
Selects the growth of a particular organism at the same time Inhibiting the growth of other organisms.
SELECTIVE CULTURE MEDIA
Streptococci /Bacitracin
Gentamycin blood agar
Haemophilus
Chocolate agar
Aeromonas
Blood agar plate w/ ampicillin
Gram (+) cocci
Phenyl ethyl alcohol
gram (+) bacteria
Columbia CNA with blood
Salmonella spp and Shigella
spp
Gram negative (GN) broth
Neisseria gonorrhea
Thayer Martin Agar (TV)
a nutritionally rich formula containing three peptone sources and 5% defibrinated (fibrin has been removed) sheep blood
COLUMBIA CNA WITH BLOOD/Columbia agar base
refers to the antibiotics colistin (C) and nalidixic acid (NA) that are added to the medium to suppress the growth of most gram-negative organisms while allowing gram-positive
bacteria to grow
CNA
-an antibiotic that targets the bacterial structure of cell membrane and cell wall
- disrupt the cell membrane of gram negative organisms thus it will not grow
Colistin
blocks DNA replication of susceptible organism
Nalidixic acid
used for the cultivation of gastrointestinal pathogens from stool specimens and rectal swabs (for Salmonella and Shigella)
GRAM-NEGATIVE BROTH
contains sodium citrate and sodium deoxycholate (a bile salt) that inhibit gram-positive organisms and the early multiplication
of gram-negative, non enteric pathogens
GRAM-NEGATIVE BROTH
Both selective and Enrichment Broth
GRAM-NEGATIVE BROTH
Primary carbon source of gram-negative broth
MANNITOL
provides nutrients for common gram-positive
cocci such as enterococci, streptococci, and staphylococci
PHENYLETHYL ALCOHOL AGAR (PEA)
should not be used in the interpretation of hemolytic reactions
PHENYLETHYL ALCOHOL AGAR (PEA)
can ONLY be used for hemolytic patterns
BAP
inhibitory to gram negative
CRYSTAL VIOLET
BASIC FUCHSIN
BILE SALT
inhibitory to gram positive
POTASSIUM TELLURITE
SODIUM AZIDE
inhibitory to swarming phenomenon
ALCOHOL
CHLORAL HYDRATE
SELECTIVE CULTURE MEDIUM FOR NEISSERIA
Thayer Martin Medium
Martin Lewis Medium
New York City Medium
SELECTIVE CULTURE MEDIUM FOR STAPHYLOCOCCUS
Mannitol Salt Agar
Phenyl Ethyl Alcohol Agar
Vogel and Johnson Agar
Chapman Stone Agar
SELECTIVE CULTURE MEDIUM FOR GROUP A
STREPTOCOCCUS
Crystal Violet Blood Agar
Polymyxin B, Neomycin acid media
(PNF)
SELECTIVE CULTURE MEDIUM FOR GROUP B
STREPTOCOCCUS
Lim, Carrot Broth
Todd and Hewitt Broth with Antibiotics
Granada Agar
SELECTIVE CULTURE MEDIUM FOR VIBRIO
Thiosulfate Citrate Bile Salt Sucrose
Monsur Tellurite Taurocholate Gelatin
Agar
isolate bacteria with specific growth requirements
SPECIAL MEDIA
medium for selective media
Lowenstein-Jensen (L-J) medium
TCBS meaning
Thiosulfate Citrate Bile Salt Sucrose
specialized medium to isolate Mycobacterium tuberculosis
Lowenstein-Jensen (L-J) medium
Selective and differential medium used for isolation and identification of Vibrio cholera
Thiosulfate Citrate Bile Salt Sucrose (TCBS)
act as sulfur source
Thiosulfate
buffering agent of TCBS
Citrate
Inhibit the growth of non-vibrio species
Bile Salts
Fermentable sugar that allows for the differentiation of Vibrio species based on their ability to ferment sugar
Sucrose
Used when there is an anticipated delay in bringing the specimen into the laboratory
TRANSPORT MEDIUM
how many minutes can a transport medium hold a specimen?
30 minutes
Transport medium of Streptococcus pyogenes
PIKE’S MEDIA
Transport medium of Neisseria
JEMBEC
Transport medium of Vibrio cholera
Alkaline Salt Transport Medium
Transport medium of Salmonella typhi
Glycerol Saline Transport Media
Transport medium of Bordetella
Mishulow’s Medium
-Used to demonstrate the antibiotic resistance or sensitivity
- an organism to different antibiotics
CULTURE MEDIUM FOR SENSITIVE/SUSCEPTIBILITY TESTING
for fastidious organisms
Mueller Hinton Agar (MHA)
pH of MHA
7.2 - 7.4
Depth of MHA
at least 4 mm
Culture medium for sensitivity of Mycobacterium
Middlebrook ZH 10, 7H 11
Culture medium for sensitivity of anaerobic bacteria
Wilkin-Chalgren Agar
Used to demonstrate biochemical activities of bacteria that is useful in their identification
BIOCHEMICAL MEDIUM
special culture medium used to facilitate anaerobic cultivation
THIOGLYCOLATE AND CYSTEINE
used to the culture medium to remove (drive off) oxygen to facilitate anaerobic cultivation
BOILING
Remove residual oxygen to facilitate anaerobic cultivation
Anaerobic chamber system with a vacuum pump and nitrogen gas
convert oxygen to water to facilitate anaerobic cultivation
Gaspak jar containing hydrogen and palladium catalysts
Used for small volume to facilitate anaerobic cultivation
plastic bag or pouch containing calcium
carbonate and catalyst
Color of Methylene blue in the absence of oxygen
BLUE
remove oxygen from the chamber by combining with hydrogen to form water
Palladium pellets
diagnostic purposes when infectious disease are involved
CULTURE and CULTURE MEDIA
Understand patterns of microbial metabolism in the laboratory
CULTURE and CULTURE MEDIA
Develop methods for interrupting their spread and controlling their growth
CULTURE and CULTURE MEDIA
Process of cultivating and growing of bacteria in a controlled environment
CULTURE
involved providing necessary nutrients, temperature, and other condition in order to support their growth
CULTURE
commonly used in industries like biotechnology and pharmaceuticals
BACTERIA
where antibiotics came from
BACTERIA
provide necessary nutrients like CHO, CHON, salts, and vitamins
CULTURE MEDIA
2 MAIN TYPES OF CULTURE MEDIA
SOLID MEDIA & LIQUID MEDIA
can be added; not one of the main type
SEMI-SOLID
material containing the necessary nutritional and environment requirements for bacterial growth
CULTURE MEDIUM
can be liquid, semi-solid or solid preparation utilized to observe growth pattern of microorganism as well as for transport and storage
CULTURE MEDIUM
3 TYPES OF CULTURE
PURE CULTURE
MIXED CULTURE
STOCK CULTURE
One genus
PURE CULTURE
pour the broth of the organism in the agar
pour plate
inoculating in agar plate until you can see a single colony
streak plate
you’ll get in the mixed culture and if you put it in the selective media, it only allows to grow what it wants to grow
selective media
organisms are injected in the animals
animal inoculation
more than 2 genus and species
MIXED CULTURE
for academic and industrial purposes
STOCK CULTURE
3 CLASSIFICATION OF CULTURE MEDIA
According to PHYSICAL STATE or CONSISTENCY
LIQUID FORM
SEMI-SOLID
SOLID
Broth, infusion, milk, Brain heart infusion
LIQUID FORM
-Allows growth of aerobes, anaerobes and facultative anaerobes
-Nutrients needed are going to dissolve in water
-Bacterial growth indicates by change in appearance
LIQUID FORM
if something grows, it will become turbid
(positive)
NUTRIENT BROTH
a sulfated polymer made of D-galactose, 3,6 anhydro-L-galactose, and D glucuronic acid and usually derived from red algae
AGAR
-Clot like consistency
- used for motility medium, transport medium
SEMI-SOLID FORM
doesn’t need oxygen but if you put them in semi-solid form, they usually grow in the bottom
STRICT ANAEROBES
they will grow or multiply near the surface
AEROBES
% of agar in Semi-Solid Form
0.5% - 1.0% agar
% of agar in Solid Form
2-3 %
Provides a firm surface on which organisms can form colonies
SOLID FORM
Melting point of agar in solid form
80 - 90 degrees celsius
Solid Form solidifies at what temp?
40 - 50 degrees celsius
2 CLASSIFICATION OF CULTURE MEDIA According to the manner of DISPENSING or DISTRIBUTION
PLATED
TUBED
2 CLASSIFICATION OF CULTURE MEDIA According to COMPOSITION
Synthetic or defined medium
Non-synthetic or complex medium
Tissue culture medium
All substances are known to the uses
- used for research purposes
SYNTHETIC/DEFINED MEDIUM
Composed of some unknown substances
- Very useful for the isolation of bacteria
NON-SYNTHETIC or COMPLEX MEDIUM
To isolate obligate intracellular bacteria
TISSUE CULTURE MEDIUM
organisms that do not require any special conditions and substances for their growth
Non-fastidious organisms
Contains nutrients required to support the growth of wide range/variety of organism
ENRICHED CULTURE MEDIUM
For most fastidious bacteria (requires special requirement)
BLOOD AGAR
Enriched medium for Haemophilus and Neisseria
CHOCOLATE AGAR
2 Enriched culture medium
BLOOD AGAR
CHOCOLATE AGAR
most frequently used for primary and selective and differential agars so it contains crystal violet to inhibit the growth of the gram positive bacteria and fungi
CHOCOLATE AGAR
also known as Hemin
X FACTOR
NAD or NADH
V FACTOR
Enumerate the Preferred blood for the preparation of BAP
1st: Sheep
2nd: Horse
3rd: Rabbit
contains non-specific inhibitors
Human Blood
HUMAN BLOOD CONTAINS
CITRATE
DEXTROSE
inhibit growth of (-hemolytic streptococcus)
CITRATE
alter types of hemolysis
DEXTROSE
Increases the number of pathogens that are outnumbered by non-pathogens
ENRICHMENT CULTURE MEDIUM
Extends the lag phase of non-pathogens while decreasing the lag phase of pathogens
ENRICHMENT CULTURE MEDIUM
allows or support the growth wide range of organism with additional nutrient
ENRICHED MEDIA
with additional nutrient but encourages specific group of organism
ENRICHMENT MEDIA
enrichment broth or semisolid media
THIOGLYCOLATE BROTH
contains many nutrient factors, including casein, yeast and beef extracts, and vitamins
THIOGLYCOLATE BROTH
Distinguishes group of organisms based on cultural characteristics
DIFFERENTIAL CULTURE MEDIUM
allows visualization of metabolic differences between group of species of bacteria
DIFFERENTIAL CULTURE MEDIUM
contains bile salts and dyes (bromothymol blue and acid fuchsin) to selectively slow the growth of most nonpathogenic gram-negative bacilli found in the gastrointestinal tract
HEKTOEN ENTERIC AGAR (HEA)
indicator for the detection of H2 S-producing organisms like Salmonella spp., can be visualized as colonies exhibiting a black precipitate
Ferric ammonium citrate