Lecture 1 Importance Of Microbiology Flashcards
The study of small living things
called microorganisms?
Microbiology
Microbiology derived from three Greek words:
Micros - study
Bios - life
Logus - study
Too small cannot be seen by the naked eye?
Microbiology
Its broadest meaning is the science which deals
which the study of all kinds of microorganisms
Microbiology
Examples of microorganisms?
True bacteria, Mycoplasma, Archaea,
Microscopic Fungi (Yeasts and Molds), Protozoa,
Microscopic Algae, Virus, Viroids, Prions and
Microscopic Worms (eg. Nematodes)
Usually applied to pathogenic forms of any
microorganism but especially to disease producing
bacteria?
Microbe and Germ
Synonymous with bacterial
infection?
Microbe and Germ
Single celled (unicellular), prokaryotic
microscopic organisms
BACTERIA/
Eubacteria (True Bacteria)
Basic shapes of Bacterial Cell
Cocci-Spherical
Bacilli-Ros-shape
Spirillium-Spiral
Arrangememts of Cocci
Coccus
Diplococci
Staphylococci
Streptococci
Sarcina
Tetrad
Shape of Bacillus subtilis
Rod- shape
Shape of Escherichia coli
Rod-shape
Shape of Streptococcus aures
Spherical
Shape of Leptospira enterrogans
Spiral- spirillum
Are also single celled (unicellular)
prokaryotic microorganisms but live in
extreme/harsh environments
Archaea/
Archaeobacteria
Extreme/harsh environments ( are also called?
Extremophiles
Methane gas producing bacteria?
Methanobacterium
Examples of eubacteria (true bacteria)?
B. subtilis
E. coli
S. aures
L. enterrogans
Examples of Archea/ Archeobacteria?
Methanobacterium
And Halobacterium
Eukaryotic, unicellular, microscopic microorganisms
Protozoa
Examples of Protozoa?
Amoeba
Paramecium
Trypanosoma
• Eukaryotic
• unicellular, colonial or multicellular
Microscopic Algae
Example of microscopic algae?
Navicula(diatoms)- unicellular
Volvox- unicellular but colonial
Spirogyra - multicellular
It belongs to microscopic fungi, eukaryotic
and unicellular?
Yeast
–Eukaryotic but multicellular microscopic fungi.
Molds
Sexual spore of molds?
Zygospre
Asexual spore of molds?
Sporangium with sporangiospore
Species of yeast that has been instrumental in winemaking, baking, and brewing since ancient times.
Saccharomyces cerevisiae
Parts of molds such as Rhizopus?
Sporangium with sporangiospore
Germinating spore
Stolon
Rhizoids
Zygospore
feathery filaments that make up multicellular fungi.
Hyphae
spores are formed by the fusion of two haploid nuclei and result in gametangia. The gametangia produce a zygote and later the zygote forms the ________
Zygospore
• Noncellular/acellular
• Ultramicroscopic
• obligate parasites
Viruses,
Viroids and
Prions
Contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid.
Viruses
Contains single stranded RNA/composed entirely of RNA?
Viroids
• Noncellular/acellular
• obligate parasite
And it contains a modified protein (PrPSc).
Prions
Units used in microscopic
measurement?
Micrometer and Nanometer
Units used in microscopic
measurement used for molds, yeasts, true bacteria
Micrometer
Units used in microscopic
measurement used foro smaller bacteria,
phytoplasma, viruses and viroids.
Nanometer
Causal organism of Bubonic Plague
Black Plague/Black Death in Europe
Caused by bacteria
Yersenia pestis.
Casual organism of smallpox
Caused two airborne virus variants, (Variola
major) and (Variola minor).
Casual organism of Acquired Immune Deficiency Syndrome
Caused by HIV (Human Immunodeficiency Virus)
Causal organism of hepatitis B?
Caused by Hepatitis B virus
Causal organism of Ebola virus disease
Ebola virus
Causal organism of SARS-COV-2 ( COVID- 19)
SARS-COV-2 ( COVID- 19) virus
Symptoms of covid-19
• Fever
• Dry cough
• Tiredness
• Loss of smell and taste
• Sore throat
• Diarrhea in some
• Pneumonia
Beneficial microbes in medicine (molds)
Penicillium spp. and Cephalosporium
and actinomycetes
Beneficial microbes
in agriculture
• Nitrogen fixing bacteria
Rhizobium
• Microbial antagonists of plant
pathogens- eg. Trichoderma
spp., Bacillus subtilis, etc.
• Rumen microorganisms
• Mycorrhiza
Beneficial microbes
in the environment
–eg.Decompose organic waste, bioremediation
Beneficial microbes in food
and industry
• Yeasts used in the
leavening of bread
• Lactobacillus spp. in
yoghurt and yakult
• Yeast in alcohol production
• M.o. and biofuels
Examples of Microorganisms in biotechnology
and genetic engineering
Bt.Corn
production
Who discovered that Bacteria as the source of
gene/genome editing system CRISPR-
CAS9
German scientist
-Emmanuelle Charpentier and
American scientist-Jennifer Doudna)-
current Nobel prize awardee
Father of Microbiology
Louis Pasteur
Study of Fungi?
Mycology
Study of algae?
Phycology
Types of viruses and organic molecules
Viruses:
1.Mimivirus
2.Herpes simplex
3.Rabies
4.HIV
5.Influenza
6.Adenovirus
7.T2 bacteriophage
8.Poliomyelitis
9.Yellow fever
Organic molecules
10.Hemoglobin molecules