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What is Microbiology?What is Microbiology?
Too small object to be seen by the ordinary eyes
Refers to life Means science
Microbiology is the science studying very small living cells that could not be seen by ordinary eyes. These cells are called: microbes, organisms, microorganisms, or pathogens.
Microbiology is the science studying very small living cells that could not be seen by ordinary eyes. These cells are called: microbes, organisms, microorganisms, or pathogens.
Introduction
Definition It is the science that deals with studying of
parasites, fungi, bacteria, and viruses that cannot be seen by the naked eye and cause human infectious diseases.
Types: Helmeth protozoa fungi bacteria virus &prion
Prokaryotes & eukaryotes ????????
Microbes
BacteriologyBacteriology
Virology
Virology
MycologyMycology
ParasitologyParasitology
Bacterial morphology
Morphology
1) Size2 )Shape
3 )Arrangement4 )Stain
5 )Motility6 )Capsulated or not
7 )Spore forming or not
Morphology
1) Size …….. In Micron
-The unit of measurement is the micrometer (µm), known
as
micron = 1/1000 of a millimeter.
so, µm = 1/1000,000 of a meter, i.e. micron = 10-6
meter?
- Bacterial cells range in size from about o.2 to 8 µm.
Morphology
1) Size2) Shape - Cocci rounded cells
- Bacilli elongated cells - Vibrios curved rods
- Spirochetes helical filaments
3) Arrangement4 )Stain
5 )Motility6 )Capsulated or not
7 )Spore forming or not
Morphology
1) Size 2) 2) Shape
3 )Arrangement4 )Stain
5 )Motility6 )Capsulated or not
7 )Spore forming or not
Chain
Pairs
Clusters
Morphology
1) Size2) 2) Shape
3 )Arrangement4 )Stain
5 )Motility6 )Capsulated or not
7 )Spore forming or not
Gram +ve
Gram -ve
Morphology
1) Size2) 2) Shape
3 )Arrangement4 )Stain
5 )Motility6 )Capsulated or not
7 )Spore forming or not
Structure of the bacterial cell
Prokaryotes & eukaryotes
Prokaryotes & eukaryotes
Table 1ProkaryoteEukanyotes
1.Nucleus- N. membrane- Nucleoli- Chromosomes
PrimitiveAbsentAbsent-Single, circular-Haploid
TruePresentPresent-Multiple, linear-Diploid
1.Cytoplasm- Mitochondria- enzyme system- Ribosome
AbsentSimple70s (30s & 50s)
PresentComplex80s (40s & 60s)
1.Cytoplasmic MPresent with no sterol except in mycoplasma
Present and contain sterol.
1.Cell wallPresent and contain peptidoglycan
If present as in fungi contain chitin.
1.ReplicationBinary fissionMitosis
1.MotilityBy flagellaBy different organs
1.ExamplesBacteriaProtozoa and fungi
