1892 Dmitri Iwanowski

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1892 Dmitri Iwanowski filterable
virus Tobacco mosaic disease
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Viral Size
More than 500 viruses could fit inside a single
bacterial cell.
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Viral Shapes
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Helical Viruses
Rabies Virus
Tightly wound coil.
Measles Virus
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Icosahedron
Herpes virus
parvovirus
Icosahedron polyhedron with 20 triangular faces
poliovirus
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Complex
smallpox
Influenza virus
Bacteriophage
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Components of Viruses
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Stages of Replication
ATTACHMENT
PENETRATION
UNCOATING
SYNTHESIS
ASSEMBLY
RELEASE
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When Viruses Dont Replicate
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Viroids
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Endosymbiosis Hypothesis
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Four Major Groups of Protozoa
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Amoebas
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Foraminifera and Radiolaria
foraminifera
radiolaria
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Flagellates
Euglena autotrophic in sunlight (chloroplasts)
and heterotrophic in dark
Trichonympha breakdown cellulose in termite
hindgut
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Flagellates
Volvox colonial organisms, some in colony
specialize in feeding others reproduction.
Giardia lamblia causes diarrhea when ingested
(contaminated waters )
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Ciliates
Paramecium
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Sporozoa
Cryptosporidium, intestinal illness
Toxoplasma gondii, causative agent for
toxoplasmosis
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Algae
unicellular
motile
colonial
filamentous
membranous and blade- like
tubular
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Phyrophyta Dinoflagellates
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Chrystophyta Diatoms
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Euglenophyta
Euglena autotrophic in sunlight (chloroplasts)
and heterotrophic in dark
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Chlorphyta
Chlamydomonas
Volvox also from flagellates
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Fungi
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Yeasts
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Lichens
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Mycorrhizae
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Fungi and Disease
Candida albicans