Introduction to
Microbiology
, What is Microbiology?
• Biology of microscopic organisms
• Is the branch of science that deals with microbes.
• i.e. Virus, bacteria, parasite etc
,Pic. - Microbes
,What is Medical Microbiology?
• Branch of medical science that deals with
• The microbes causing disease
• The ways they produce disease
• Diagnosis
• Treatment
• Host response - Immunity
• Prevention
, Founder of Modern Microbiology
➢French chemist Louis
Pasteur (1822 – 1895)
introduced the term,
microbiology
➢He discovered
• Prove ‘germ theory’
• Culture technique
• Disease production by
microbes
• Anthrax, Rabies
• Live attenuated vaccine
• fermentation was caused by
the growth of bacteria and
yeasts (1857-60).
,The Germ Theory of Disease
• The germ theory of disease states that some diseases are caused by
microorganisms.
• These small organisms, too small to see without magnification,
invade humans, animals, and other living hosts.
• Their growth and reproduction within their hosts can cause a disease.
"Germ" may refer to not just a bacterium, but also a protist, fungus,
virus, prion, or viroid.
6
,Kochs Postulates…………
❑The causative agent must be present in all affected individuals
but absent in healthy individuals.
❑The agents must be capable of being isolated and cultured in
pure form.
❑When the culture agent is introduced to a healthy individuals,
the same disease must occur.
❑The same causative agent must be isolated again from the
affected host.
7
,
, Microbes includes:
• Bacteria
• Virus
• Parasite Helminths
• Fungus Protozoa
,
Microbiology
, What is Microbiology?
• Biology of microscopic organisms
• Is the branch of science that deals with microbes.
• i.e. Virus, bacteria, parasite etc
,Pic. - Microbes
,What is Medical Microbiology?
• Branch of medical science that deals with
• The microbes causing disease
• The ways they produce disease
• Diagnosis
• Treatment
• Host response - Immunity
• Prevention
, Founder of Modern Microbiology
➢French chemist Louis
Pasteur (1822 – 1895)
introduced the term,
microbiology
➢He discovered
• Prove ‘germ theory’
• Culture technique
• Disease production by
microbes
• Anthrax, Rabies
• Live attenuated vaccine
• fermentation was caused by
the growth of bacteria and
yeasts (1857-60).
,The Germ Theory of Disease
• The germ theory of disease states that some diseases are caused by
microorganisms.
• These small organisms, too small to see without magnification,
invade humans, animals, and other living hosts.
• Their growth and reproduction within their hosts can cause a disease.
"Germ" may refer to not just a bacterium, but also a protist, fungus,
virus, prion, or viroid.
6
,Kochs Postulates…………
❑The causative agent must be present in all affected individuals
but absent in healthy individuals.
❑The agents must be capable of being isolated and cultured in
pure form.
❑When the culture agent is introduced to a healthy individuals,
the same disease must occur.
❑The same causative agent must be isolated again from the
affected host.
7
,
, Microbes includes:
• Bacteria
• Virus
• Parasite Helminths
• Fungus Protozoa
,
