Introduction slides Flashcards
coccus
circular
diplococcus
2 circles
streptococcus
chain
tetrads
4x circle
staphylococcus
grape-like shape
sarcinae
octet of circles
bacillus
rod
diplobacillius
2x rods
streptobacillus
chain of rods
coccobacillus
oval
vibrio
comma shape
gram positive wall characteristics
thick peptidoglycan walls
discovered the first vaccine (smallpox)
Edward jenner
developed hand washing
Ignaz Semmelweis
discovered the rabies and anthrax vaccine and pasteurization
Louis Pasteur
developed antiseptic technique
Joseph Lister
cure syphillis, gram staining, father of chemotherapy
Paul Ehrlich
discovered streptomycin and other antibiotics
Selman Waksman
discovered penicillin
Alexander Fleming
discovered the cause of TB, anthrax and cholera
Robert Koch
Robert Hooke
discovered cells
discovered RNA controlled production of protein
Hargobind Khorana, Marshall Nirenberg, Severo Ochao
a gram negative rod
enterobacteria
Vibrio, Helicobacter and Campylobacter
gram negative curved rods
gram negative cocci example
Neisseria
Gram positive rods example
Bacillus and Clostridium
Staphylococcus and Streptococcus
gram positive cocci
acid fast rods
mycobacterium and Nocardia
spirochetes
Treponema and Borellia
rickettsia and chlamydia
obligate intracellular parasites
bacteria that is cell wall deficient and tiny
mycoplasma
stain based on morphology and arrangement
simple staining
stain used for identification and/or visualization of structure
differential staining
type of bacteria that can change their shape
pleomorphic
an example of pleomorphic bacteria
Mycoplasma pneumonia or M. genitalium
stains negatively charged molecules and structures
positive stain (basic stain)
stains positively charged molecules and structures
negative stain (acidic stain); sometimes positive depending on the nature of the cell
stains background, not specimen
negative stain
steps of gram stain
- crystal violet
- gramâs iodine
- ethanol
- Safranin
gram positive color
purple
gram negative color
pink
steps of acid fast stain
- carbolfuchin
- heat
- acid alcohol
- methylene blue
acid fast color
red
not acid fast color
blue
mordant in gram stain and acid fast stain
gram: grams iodine
acid fast: heat
stain target with malachite green, then wash and counterstain with safranin
endospore stain
endospore stain result
endospores - bluish green
other - pink/red
target covered with tannic acid/potassium alum mordant then stained using pararosaline/ basic fuchsin
flagella stain
flagella stain result
flagella are visible
negative staining with Indian ink or nigrosin to stain the background
counterstaining can be done to stain the cell and leaving the target clear
capsule stain
result of capsule stain
capsules appear clear or as halos
Schaffer Fulton procedure is related to
the endospore stain
gram negative bacteria have a ___ peptidoglycan layer and a ___ layer
thin; lipopolysaccharide
gram positive bacteria have a ___ peptidoglycan layer and no ___ layer
thick; lipopolysaccharide
is gram positive/negative more susceptible to penicillin?
gram positive
is gram positive/negative sensitive to lysozyme?
gram positive
gram positive bacteria have no ___, ___ and ___ while gram negative bacteria have this.
outer membrane, porin proteins and periplasm
gram positive bacteria have ___ while gram negative do not
teichoic acids
Lung, Ziehl Nelson procedure is related to
acid fast stain
oxidase reagent applied filter paper â> color change which indicates positive result
oxidase test
which test measures if cytochrome C is present?
oxidase test
test to determine formation of pyruvic acid from enzyme tryptophanse
Indole test
enzymes secreted by bacterial cells and function outside the cell to breakdown macromolecules
extracellular enzymes
determines if an enzyme is produces to coagulate plasma (fibrinogen -> fibrin)
coagulase test
test where enzyme that can hydrolyze DNA is cultivated on an agar plate containing DNA
DNAse test
Enterotube
tests for enterobacteriaceae by 12 different tests
ELISA (enzyme linked immunosorbent assay)
rapid approach; involves antibodies rotated on micrometer plates, antigens, second antibody with a linked enzyme and a substrate
rapidly identifies pathogens using antiserum
slide agglutination
Slide agglutination results
positive - clumping
negative - no clumping
serological test; proteins separated by electrophoresis and blotted onto a membrane; antibodies with enzymes linked probe the membrane
Western blotting
western blotting results
antibodies bind and light up - positive
no binding - negative
bacteriophage lyses specific strains of bacteria; drops of phage with solutions placed in spots on agar
phage typing
phage typing results
clear zones (plaques) due to lysis - positive
no plaques - negative
microbe with central endospore
bacillus megatarium
microbe with terminal endospore
clostridium tetani
microbe with subterminal endospore
clostridium subterminale
what are in almost all gram negative bacteria but not many gram positive bacteria?
pili
short attachment pili (fimbriae)
numerous; used for adhesion, colonization and resist flushing
long conjugation pili
âFâ sex pili, facilitates gene transfer
monotrichous flagella
one flagella at one end
amphitrichous flagella
one flagella at both ends
lophotrikhous flagella
multiple flagella at one end
peritrichous flagella
flagella all around the bacteria
organelle of locomotion; rotate clockwise and counterclockwise
flagella
characteristics of Endospore
low H2O content, chemical resistance, dipicolinic acid (DPA), SASSP, strong spore coat
purpose of small acid-soluble spore proteins (SASSP)
protect the DNA of the bacteria from UV radiation, desiccation, and dry heat
Actinomycetes, Corynebacterium, Mycobacterium, Propionibacterium, Gradnerella, Nocardia
High G and C % Gram positive Bacteria
Clostridia, Sarcina, Bacillus, Listeria, Staphylococuus, Streptococcus, Enterococcus, Lactobacillus
Low G and C % Gram Positive Bacteria
PCR (polymerase chain reaction)
specific sequences of DNA amplified with primers, Taq polymerase