WK 1 - history Flashcards
elieved that invisible creatures were responsible for diseases.
Lucretius and Girolamo Fracastoro
Francesco Stelluti observed
bees and weevil
States that life can arise from death
SPONTANEOUS GENERATION DEBATE
This belief remained unchallenged for 2000 years
SPONTANEOUS GENERATION DEBATE
Aristotle supported the theory of spontaneous generation by
observing that aphids appeared on plants after dew settled on them, that fleas could come frmo putrid matter, and mice from dirty hay.
He believed that the dew, combined with the earth, could spontaneously generate living creatures.
Aristotle
ates that life arises only from pre-existing life, not from non-living matter.
principle of biogenesis
supported spontaneous generation theory
Aristotle
John Needham
denied spontaneous generation theory
lazaro spallanzani
Francesco Redi
Robert hooke (technically though not implicitly)
Louis Pasteur
Robert Koch
Joseph lister
He believed that his chicken broth experiment was proof that life can arise from non-living
John Needham experiment
Denied Needham’s claims
Lazaro Spallanzani
Believes that the microbes that came from Needham’s experiment came fromwhat
Believes that the microbes that came from Needham’s experiment came from the air instead of the broth and that boiling will kill them
spallanzani
how did spallanzani disprove needham’s experiment
To prove this, he took 2 flasks and sealed one, the one sealed did not have any microbes thereby proving his claim
Maggot and meat with gauze experiment
francesco redi
In his experiment, he found out that flies were the origin of the maggots and not another non-living entity
francesco redirected
Found Little boxes/cells via a Simple magnifying lens
robert hooke
Animalcules was used to describe the microorganisms he found in his microscope
Anton van Leeuwenhoek
First protazoologists
Anton van Leeuwenhoek
Father of microbiology
Louis Pasteur
Disproved theory of spontaneous generation via the theory of biogenesis
Louis Pasteur
how was the spontnaeous generation theory disproved
His swan neck flask experiment settled the argument on spontaneous generation theory by proving that life can only come from living things
louis pasteur worked on
Worked on pasteurization (pag alis ng microbe same), fermentation
German theory of disease, “microorganisms are the cause of infectious diseases”
who
louis pasteurization
To get rid of microbes you need to filter or expose it to chemicals
who said
louis pasteur
Death after childbirth is caused by material on hand of a midwife or attending physician
oliver wendell
Ordered importance of handwashing
oliver wendell
Death rate increased due to medical students and decreased in summer due to not doing handwashing
ignaz ssemmelweis
One of the father of epidemiology
john snow
Found source of cholera in london
JOHN SNOW
Key role in setting standard for good proper hygiene
JOHN SNOW
leader in the adaption of anaesthesia
JOHN SNOW
Sickness or disease is caused by bad air daw
JOHN SNOW
Sterilization of growth media in science
Tyndallization
Process of sterilizing liquid by heating and could be killed successive 3 days heating (bacteria)
Tyndallization
Bacteria can exist in 2 form
HEAT STABLE AND HEAT SENSITIVE
BACTERIA THAT Needes prolonged/intermittent heat to be destroyed
HEAT STABLE
Zero microbes
STERILE
Confirmed germ theory via the kohc’s postulate
ROBERT KOCH
Developed pure culture techniques
ROBERT KOCH
Originated use of 2-part petri dish for growing bacteria and a technique for isolating bacterial colonies
ROBERT KOCH
Was able to see agent of tb via culture which is Myobacterium tuberculosis
ROBERT KOCH
Was able to see agent of tb via culture which is Myobacterium tuberculosis IS AKA
or Kohc’s bacillus
identified and isolated the bacterium Bacillus anthracis, the causative agent of anthrax.
ROBERT KOCH
Said that pure culture technique
is the foundation of all research on infections
ROBERT KOCH
is the foundation of all research on infections
PURE CULTURE TECHNIQUE
Kohc’s postulate
- Pag may sakit may microbe,
pag wala edi wala lol - Mapapatubo sa culture plate
yung microbe - Cell from culture should cause
diseases - Grinow uli tas same microbe
Problems with kohc’s postulate
- Some are aerobic and some are
anaerobic - Some have no symptom but still has
the microbe due to immunity - Subclinical diseases
- carriers
- Cant grow on lab media
- Humans are the only host
- Obligate intracellular parasite
- Toxins or immunopathology
- If the disease is caused by a virus
- Pwedeng ibang klaseng sakit pag iba
iba agent na nasa katawan
In the vagina there is which keeps the it acidic
● Lahat ng butas sa katawan may bactE
Lactobacilus
acidophilus
- Father of modern surgery
JOSEPH LISTER
- Applied germ theory in surgery
JOSEPH LISTER
- Father of modern amnisepsis
JOSEPH LISTER
Avoid infection by preventing it from wound
this led to rise of sterile surgery
JOSEPH LISTER
Namamatay daw inooperahan dahil sa
contamination sa paligid from surgery
JOSPEH LISTER
Supported louis pasteur when he stated To
get rid of microbes you need to filter or
expose it to chemicals
JOSEPH LISTER
- Made first vaccine
Edward Jenner
Made small puncture with cowpox material in
arm of human to prevent smallpox mga
milkmaids daw kasi di nagkakasmallpox so
nag experiment siya.
Edward Jenner
Cure for syphilis:
salvarsan (Arsenic
derivative) –
preparation 606
6 salvation for syphilis
Cure for syphilis: salvarsan (Arsenic
derivative) – siya nag develop neto and called
it preparation 606 salvation for syphilis
WHO
Paul Ehrlich
chemotherapy treatment via chemical
substance
WHO
PAUL EHRLICH
wanted to find a magic bullet, an agent that
would kill disease without harming the patient
PAUL EHRLICH
- Gamitin daw ni kohc yung agar?
Walter Hesse
- Developed Petri dish
Richard petri
Staining method that demonstrated bacteria
and distinguished between gram + and -
Christian gram
Observed staphylococcus colonies
disappearing near the penicillin which is
antibacterial kaya di makalapit
Alexander Flehming
Tobacco mosaic virus could pass filter to
remove bacteria
WHO0
DIMITRI IVANOVSKI
- Culture media to study yeast and mold
WHO
Raymond Sabouraud
- Dye prontosil effective against bacteria
Gerhard Domagk
- Polio vaccine
Jonas Salk and Albert Sabin
- Streptomyocin and tetrocypin
Selman Walksman
- Electron microscope
Ruska
- Dna is genetic material
Avery and Macleod
- Dna, 1953
Crayson and crick
Research RNA and protein synthesis in
bacteria
Jacob and monod, 1965
e use of microbe
to remove toxins and benefit the environment
Bioremediation
Bioremediation EXAMPLE
(e.g. pesticide via Bacillus thuringiencis )
5 TYPES OF MICROBES
Has 5 types
1. Protozoa
2. Microscopic algae
3. Fungi
4. Virus
5. Bacteria
2 types of bacteria
- Eubacteria - most are
disease-causing - archaebacteria
- The smallest known infectious agent
VIRUS
- Non-living unless it lives in a living cell
VIRUS
VIRUS CONTAINS
- Only nucleic acid and protein coat
WHAT KINF OF ORGANISM IS A VIRUS
SUBCELLULAR ORGANISM
Single-celled eukaryotic organisms larger
than bacteria
PROTAZOAN
- Lead cause of death in developing countries
PROTAZOAN
- Eukaryotic, single or multicellular
FUNGI
DESCRIBE MOLD
MULTICELULLAR FUNGI THAT REPRODUCES VIA SPORE
DESCRIBE YEAST
UNICELLULAR FUNGI THAT REPRODUCES VIA BUDDING
2 KINDS OF MULTICELLULAR PARASITES
PARASITIC INSECT AND PARASITIC WORM
- Single-celled prokaryote
BACTERIA
CLASSIFICATION OF BACTYERIA
Classification
1. Shape
2. Retain dyes
3. Grow with or without air
4. Biochemical reaction
- By Carl von linne
TAXONOMY
TAXONOMY IS BASED ON WHAT
PROCESS OF EVOLUTION
TAXONOMY IN ORDER
Taxonomy
● Domain
● Kingdom - Prokaryotae
● Phylum - Gracilicutes
● Class - Scotobacteria
● Order - Eubacteria
● Family - Enterobacteriaceae
● Genus - Escherichia
● Species - coli
3 TYPES OF DOMAIN
- Eubacteria = true bacteria,
peptidoglycans in cells - Archaea = ancient bacteria, odd
bacteria, lives in extreme environment
such as those with high salt or
heat,etc. (extremophiles) - Eukarya = have nucleus and
organells
true bacteria,
EUBACTERIA
peptidoglycans in cells
EUBACTERIA
ancient bacteria, odd
bacteria, lives in extreme environment
such as those with high salt or
heat,etc. (extremophiles)
ARCHAEA
have nucleus and
organells
EUKARYA
P VS E
Has genetic material that does not segregate
to cytoplasm but instead is in nucleoid
PROKARYOTE
P OR E
- Eubacteria and archaea
PROKARYOTES
IS PROKARYOTE UNI OR MULTICELLULAR
UNI
- Smaller (70s) ribosome
PROKARYOTES
EUKARYOTES - Unicellular or multicellular
BOTH
- Larger (80s) ribosome, 70s in organelle
EUKARYOTES
S i for
svedberg unit
- Arrangement of bacteria into groups
Classification
- Naming, means of communicating
Nomenclature
Practical use of classification made to
distinguish certain organism
IDENTIFICATION
Gives each microbe 2 names
- Genus - noun, capital
- Species - adj,lowercase
NAMING
All cocci are gram + except
neisseria,
moraxella and bianharella
ARE BACTERIA UNI OR MULTICELLULAR
UNI KASI NGA PROKARYOTES SIYA
HOW ARE BACTERIA DIFFERENTIATED
Differentiated based on shape,
morphology,chemical composition
DESCRIBE BACILLI
rod, 0.5 - 1um width upto 3um
length
the ones causing leptospirosis
SPIRAL BACTERIA
EXAMPLE OF SPIRAL BACTERIA
Leptospira, morella (causes lime) ,
treponema (syphilis)
DESCRIBE COCCI
- Cocci = sphere, 1um, diameter
COCCI SHAPE AND ARRANGEMENT
- Coccus
- Diplococci - dalawang magkadikit
- Streptococci - parang necklace / chain
(strepto) - Tetrad - apat apat
- Sarcina - walo
- Staphylococci - grape-like
BACILLI ARRANGEMENT
Bacilli
1. Coccobacillus = parang lgbt di bilog di haba.
Short and fat
2. Bacillus
3. Diplobacillus
4. Streptobacillus
5. Palisades
SPIRAL ARRANGEMENT
- Vibrio = comma shape, causes cholera
- Spirillum = rigid, has flagella outside
- Spirochete = wiggly. Looks like its dancing,
flagella surrounds its body
- Layer that surrounds bacteria.
CAPSULE
- Sugar coat. usually polysaccharide
CAPSULE
Acidophil. Nabubuhay kahit na ph 1 like
gastritis
CAPSULE
Only 2 kinds of bacteria can produce spore
- Bacillus - anaerobic
- Clostridium - aerobic
BACTERIA IS surrounded by __________bc its firmly attached
to the cell, if its loosely attached its called the
________
surrounded by capsule/glycocalyx (sticky
protective coat of sugar) bc its firmly attached
to the cell, if its loosely attached its called the
slime layer
BACTERIA IS surrounded by protective cell wall with
peptidoglycan (protein-carbohydrate
Carry on
photosynthesis and respiration
ENFOLDING OF CELL MEMBRANE
short hair-like projections IN BACTERIA
short hair-like projections called pilli
PILLI DESCRIBE
2 TYPES:
1. common pili or fimbriae = for
attachment
2. sex pili = for conjugation
ESSENTIALSTRUCTURE OF BACERIA
-OUTER MEMBRANE
-CELL WALL
-CELL MEMBRANE
-CYTOPLASM
- NUCLEAR MATERIAL
Protects the cell against sme
antibiotics
- Outer membrane
- gives shape to bacteria.
- Cell wall
Contains peptidoglcan responsible for
the staining property of bacteria
cell wall
gram positive layer
Gram +: 2 outer layers , inner cell
membrane and outer cell wall
gram negative layer
Gram -. 3 layers, inner cell
membrane, outer cell wall, outermost
outer membrane
- Allows hidden substances outside of
the bacterial cell - Filter of bacteria
cell membrane
circular chromosome almost
like a flower and dna called
PLASMID
CONTAINS PLASMID
CELL MEMBRANE
Neutrophil has trouble handling it if it
gets slimy so they phagocytize
CAPSULE/GLYCOCALYX
Prortects cells / evades against
phagocytosis
CAPSULE
PILLI IS MOSTLY MADE UP OF
The nature of their chemical is highly
protein (gawa sila sa protein)
Propels the bacterial cell, they create
a run
FLAGELLA
IN A FLAGELLA
Clockwise rotation creating a run,
counter clockwise a
stumble
FLAGELLA IS MADE UP OF
Composed of filament, hook, basal
body or their rings inserted in their cell
membrane
Filament is composed of
flagellin
informs connection
between filament
Hook
basal
body composed of
rings
if the bacilli is only on end its
called
LOCOTRICHOUS
Magkabilang dulo meron, its
called
amphitrichous
Body is surrounded by
flagella,its called
peritrichous
- tawag pag wala flagella
trichous
Spore is
used to recreate another
vegetative state
Protects themself against harsh
environment or dryness
endospore
Located terminall (like
clostridium
center (like ) o
bacillus
anti-bacterial resistance can be
installed in the genes here.
plasmid
describe badcterial cell wall
The cell wall is an alternating molecules of
-acetylglucosamine (NAG) or the sugar
backbone and N-acetylmuramic acid (NAM)
tas pinagdudugotong sila ng amino acids or
side chains
difference of gram positive and negative cell wall
Major difference ng dalawa in their cell wall is that
- Mas makapal sa positive kesa negative
- 3 layer sa negative, 2 sa positive
- May periplasm sa gram negative
- Sa positive may teichoic acid
- Pwede ren magkaron ng lipopolysaccharide
sa positive
responsible for shock infection,
coma in ground negative sepsis in patients
kasi nasa outer membrane siya ng ground
negative bacteria
lipid a
lipid a is located in the
outer membrane
- bacteria with no cell wall.
mycoplasmis
kind microe daw idk
- Bacteria with capsule out of polysaccharide/
Encapslated bactera
Capsule can be made out of polypeptide
though uncommon
Encapsulated bacteria
- Aka Axial filaments
endoflagella
Nakapalibot sa katawan nila flagella sa loob
ng katawan kaya den flexible katawan nila -
they can do ________in the mud.
endoflagella
endospore consists of
Consists of: exosporium,outer and inner
spore coat, outer membrane cortex germ cell
wall inner membrane and ca-dpa which is the
most important for resistance
he most important molecule/substance for
each to withstand adverse condition in
bacteria is
dipoclinic respond agropore
once it becomes a
spore, it becomes a new meditative cell again
in a process called
germination
process
of formation is .
sporulation