Flashcards in Ch.1 Microbial World and You Deck (32)
What is Microbiology?
The study of organisms too small to be seen without magnification.
3 examples of eukaryotes are?
3 distinctive characteristics of viruses are?
3 distinctive characteristics of prakaryotes?
2. No organelles
3. 0.2um to 10um (smaller than RBC's)
3 distinctive characteristics of Eukaryotes?
3 major groups of eukaryotic pathogens are?
What is an infectious disease?
A disease in which a pathogen invades a susceptible host in order to carry out a part or all of its life cycle & in the process tends to cause disease.
What is a biofilm?
A community of microbes attached to a surface.
Antonie van Leeuwenhoek was the first to observe what?
John Tyndall & Ferdinand Cohn each demonstrated the presence of what?
Heat resistant forms of some microbes.
Ferdinand Cohn discovered what?
Dr. Ignaz Semmelweis (1847) discovered what?
The correlation of infections with physicians not washing hands while transferring from the autopsy room to the maternity ward.
Joseph Lister (1867) introduced what?
Aseptic techniques to reduce microbes in medical settings to prevent infection.
Louis Pasteur showed that microbes caused ____ and ____
In 1861 Louis Pasteur disproved what?
Spontaneous generation of microorganisms.
In 1857 Louis Pasteur developed what?
Louis Pasteur developed the ____ vaccine
Louis Pasteur demonstrated what?
Germ Theory of Disease
Robert Koch established what?
What is Koch's Postulates?
A sequence of experimental steps that verified the germ theory.
Robert Koch identified cause of ____, ____ and ______
Anthrax; TB; Cholera
Robert Koch developed what kind of methods?
Koch's Postulates is used to determine what?
The causative or etiological agent of infectious disease.
What is an etiological agent?
Cause of infectious disease.
What is the first step of Koch's Postulate?
Find evidence of a particular microbe in every case of a disease.
What is the second step of Koch's Postulates?
Isolate that microbe from an infected subject and cultivate it artificially in the laboratory.
What is the third step in Koch's Postulates?
Inoculate a susceptible healthy subject with the laboratory isolate and observe the same signs & symptoms of the disease.
What is the fourth step of Koch's Postulates?
Re-isolate the agent from this subject & show that it is the same!
What is Evolution?
-Descent with modification
-All new species evolve from preexisting species
-All life on earth shares a common ancestors and have similarities