introduction to microbiology
DESCRIPTION
BASIC PRINCIPLES OF MICROBIOLOGY DEFINITION SIGNIFICANCE HISTORY OF MICROBIOLOGYTRANSCRIPT
PHARMACEUTICAL MICROBIOLOGYCHAPTER I: INTRODUCTION
Jenna Lee Q. Valencia, RPhDepartment of Pharmacy
School of Natural SciencesSaint Louis University
CHAPTER I: INTRODUCTION
A.BASIC PRINCIPLES OF MICROBIOLOGY
1. DEFINITION2. SIGNIFICANCE3. HISTORY OF
MICROBIOLOGY
1. DEFINITION OF MICROBIOLOGY
MICROBIOLOGY
“Micro” Very small, minute
“Biology” “Bios”- living organisms “logy”- the study of
MICROBIOLOGY
Microbiology is the study of very small living organisms
Microorganisms are said to be ubiquitous.
PHARMACEUTICAL MICROBIOLOGY
Sterilization and preservation
Antibiotics
2. SIGNIFICANCE OF MICROBIOLOGY
1. Living on and in our bodies
500 to 1000 different species of microorganisms live on and in us
Indigenous microflora
2. Opportunistic pathogens
Microorganisms awaiting the opportunity to cause disease.
3. Essential for life
Responsible for many processes that sustain life
4. Involved in decomposition
Decomposition of dead organisms and the waste products of living organisms.
Decomposition of industrial wastes
5. Essential in various food and beverage industries
APPLIED MICROBIOLOGYFood Microbiology
Industrial Microbiology
6. Produce antibiotics
ANTIBIOTIC:A substance produced by a microorganism that is effective in killing or inhibiting the growth of other organisms.
Penicillium chrysogenum
Other Examples:
BacitracinBacillus licheniformis
StreptomycinStreptomyces griseus
VancomycinStreptomyces orientalis
7. Field of Genetic engineering
A gene from one organism is inserted into a bacterial or yeast cell.
8. Can cause disease
1. Infectious disease
2. Microbial intoxication
3. HISTORY OF MICROBIOLOGY
a. Early Years of Microbiologyb. The Golden Age of Microbiologyc. The Modern Age of Microbiology
a. Early Years of Microbiology
a. Antoni Van Leeuwenhoek
The man who discovered the microbial world
Made a simple microscope
Leeuwenhoek’s Microscope
b. Carolus Linnaeus
Father of Taxonomy
b. The Golden Age of Microbiology
1. Is spontaneous generation of microbial life possible?
1. Francesco Redi
Made series of experiments with meat
Redi’s Experiments
2. John Needham
Boiled beef gravy infusions of plant material in vials, which he then tightly sealed with corks.
3. Lazarro Spallanzani
Boiled some infusions for almost an hour and sealed the vials by melting their slender necks closed
4. Rudolf Virchow
Concept of biogenesis
5. Louis Pasteur
Boiled infusions long enough to kill everything
But instead of sealing the flasks, he bent their necks into an S-shape
Pasteur’s Experiment
b. The Golden Age of Microbiology
2. What causes fermentation?
1. Louis Pasteur
Discovered that bacteria fermented grape juice into acids = the spoilage of wine.
Developed pasteurization
b. The Golden Age of Microbiology
3. What causes disease?
1. Robert Koch
Discovered anthrax bacillus
Started the field of ETIOLOGY
Bacillus anthracis
Isolation of specific types of microbes
2. Richard Petri
Invented the Petri dishes
3. Hans Christian Gram
Developed the staining technique Gram’s Stain
Gram’s Stain
ASSIGNMENT
1. Gram stain Procedure 2. Stains and chemicals3. The use of each stain
and chemical
b. The Golden Age of Microbiology
4. How can we prevent Infection and Disease?
1. Ignaz Semmelweis
Began requiring medical students to wash their hands with chlorinated lime water
2. Joseph Lister
He began spraying wounds, surgical incisions and dressings with phenol
3. John Snow
Standards for good public hygiene
His study was the foundation of : INFECTION CONTROL
EPIDEMIOLOGY
4. Edward Jenner
Tested the hypothesis that a mild disease called cowpox provided protection against potentially fatal smallpox.
SMALL POX
Caused by the pox virus: Variola
COW POX LESION ON COW
5. Paul Ehrlich
Speculated about a “magic bullet"
Found a chemotherapeutic agent called salvarsan
SYPHILIS
Salvarsan
6. Alexander Fleming
Discovered penicillin
ZONE OF INHIBITION
Penicillium chrysogenum
c. The Modern Age of Microbiology
Microbial Genetics
1. Molecular Biology
Combines aspects of biochemistry, cell biology and genetics to explain cell function at the molecular level.
2. Recombinant DNA Technology
The genes of microorganisms are manipulated for practical applications.
3. Gene Therapy
A process that involves inserting a missing gene or repairing a defective one in human cells
Gene therapy has been used to treat patients with:
Adenosine deaminase (ADA) deficiency
Cystic fibrosisLDL-receptor deficiency