Bacteria and Public Health Microbiology Essay

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Foundations in Microbiology
Fifth Edition
Talaro
Chapter
1

Microbiology
• The study of of organisms too small to be seen without magnification
– bacteria
– viruses
– fungi
– protozoa
– helminths (worms)
– algae
2

3

Branches of study within microbiology • Immunology
• Public health microbiology & epidemiology
• Food, dairy and aquatic microbiology
• Biotechnology
• Genetic engineering & recombinant DNA technology 4

Microbes are involved in
• nutrient production & energy flow
• decomposition
• production of foods, drugs & vaccines
• bioremediation
• causing disease

5

Impact of pathogens
• Nearly 2,000 different microbes cause diseases • 10 B infections/year worldwide
• 13 M deaths from infections/year worldwide

6

7

8

Characteristics of microbes

9

10

Antonie van Leeuwenhoek

• First to observe living microbes • his singlelens magnified up to 300X

(16321723)

11

12

Spontaneous generation
Early belief that some forms of life could arise from vital forces present in nonliving or decomposing matter.
(flies from manure, etc)

14

Louis Pasteur
• Showed microbes caused fermentation & spoilage
• Disproved spontaneous generation of m.o.
• Developed aseptic techniques. • Developed a rabies vaccine.

(18221895)

15

16

Germ theory of disease
Many diseases are caused by the growth of microbes in the body and not by sins, bad character, or poverty, etc.

Robert Koch
• Established a sequence of experimental steps to show that a specific m.o. causes a particular disease. • Developed pure culture methods. • Identified cause of anthrax, TB, & cholera.
(18431910)

18

Taxonomy system for organizing, classifying & naming living things
• Domain Archaea, Bacteria &
Eukarya

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