Poxvirus
size and shape
Big circle
T4 bacteriophage
size and shape
head, tail fiber
adenovirus
size and shape
circle with lines coming out
paramyxovirus
size and shape
largest, round
Tobacco mosaic virus
size and shape
long rod
picornavirus, Reovirus
size and shape
very small
Herpesvirus
size and shape
medium circle
togavirus
size and shape
small circle
Picornaviridae
+ sense RNA virus
Polio, common cold, Hep A
EX: "Enterovirus
Rhinovirus
Hepatovirus
Togaviridae
+ sense RNA virus
"Rubella (German measles)
Equine encephalitis" "Rubella virus
Equine encephalitis virus
Flaviviridae
+ sense RNA virus
Yellow fever
Flavivirus
Reteroviridae (contain reverse transcriptase)
+ sense RNA virus
"HTLV-I
HIV"
Adult leukemia, tumors, AIDS
Paramyxoviridae
- sense RNA virus
Measles
Morbillivirus
Rhabdoviridae
- sense RNA virus
Rabies
Lyssavirus
Orthomyxoviridae
- sense RNA virus
Influenza A and B
Influenzavirus
Flioviridae
- sense RNA virus
"Hep C
Yellow fever
Marburg
Ebola"
Filovirus
Bunyavirdae
- sense DNA virus
Respiratory distress hemorrhagic fever
Hantavirus
Reoviridae
Double stranded RNA virus
Respiratory and gastrointestinal infections
Rotavirus
Adenovirdae
double stranded dna viruses
Respiratory infections
Human adenoviruses
Herpesviridae
double stranded dna virus
Oral and genital herpes, chicken pox, shingles
"Simplexvirus
Varicellovirus
Poxviridae
double stranded dna virus
Small pox, cow pox
Orthopoxvirus
Hepadnaviridae
double stranded dna virus
Hep b
Hep b virus
Papovaviridae
double stranded dna virus
Warts, cervical and penile cancers
Human papillomaviruses
Parvovirdiae
single stranded dna virus
Fifth disease in children
B19
Rhinovirus
human common cold, the colors represent different capsomers of the capsid
Genome
(head of bacteriophage) carries the genetic information necessary for replication of new phage particles
Tail sheath
retracts so that the genome can move from the bacteriophages head into the host cells cytoplasm
Plate and tail fibers
attach to specific receptor sites on the cell wall of a susceptible host bacterium
DNA is store in the.....of the bacteriophage
Head
Steps in replication of a virulent bacteriophage
1 Adsorption
2 Penetration
3 Biosynthesis
4 maturation
5 release
step one of bacteriophage replication
adsorption
phage is adsorbed onto bacterial cell wall
step two of bacteriophage replication
penetration
phage penetrates bacterial cell wall and cell membrane, phage dna is injected
step three of bacteriophage replication
biosynthesis
the phage dna directs the cells metabolism to produce viral components-proteins and copies of phage dna
step four of bacteriophage replication
Maturation
assembly of newly synthesized viral components into complete phages
step five of bacteriophage replication
release
bacterial cell lyses, releasing mature phages
Eclipse period
spans from penetration through biosynthesis
in the eclipse period mature virions are
undetected
Latent period
spans from penetration to the point of phage release
Replication of a temperate bacteriophage
following adsorption and penetration, the virus undergoes prophage formation
once established as a prophage, the virus can remain dormant for a long time through the lysogenic cycle
lysogenic cycle
period of bacterial growth with a prophage
Prophage
viral dna within the bacterial chromosome
temperate phages do
not always undergo a lytic cycle
lysogen
combination of a bacterium and a temerate phage
Bacteriophage
attachment of tail fibers to cell wall proteins
injection of viral nucleic acid through bacterial cell wall
no uncoating needed
synthesis in cytoplasm, bacterial synthesis ceased, wiral dna or rna replicated, formation of viral mrna
host cell lysis
chroni
animal virus
attachment of spikes, capsid or envelope to plasma membrane proteins
penetration through endocytosis or fusion
uncoating: enzymatic digestion of viral proteins
synthesis in cytoplasm for rna viruses and in nucleus for dna viruses, host cell synthesis is c
viron
a complete virus particle
consists of capsid, dna and sometimes envelopes
SS vs DS
single stand vs double strand
1883, A Mayer
viruses can have single strand
Replication of rna virus
-
RNA (rna polymerase) ->
RNA-mrna->protein-----
------->new viral RNA--
---->new virus
Replication of rna virus
+
RNA-mrna--> proteins---
-------->new viral RNA--
--->new virus
Replication of rna virus
HIV
Viral RNA(reverse transcriptase(R.T.))--->DNA--mRNA-->proteins & RT---
---->new viral RNA-----
--->new virus
Rhinoviruses have
canyons that attach to specific membrane proteins on the host cell membrane
HIV has
specific envelope spikes (viral glycoproteins) that attach to a membrane receptor on the surface of specific host immune defense cells
viriods differ from virus in four ways
1 each viriod consists of a single circular rna molecule of low molecular weight
2 viriods exist inside cells, usually inside of nucleolo, as particles of rna without capsids or envolopes
3 viroid rna does not produce proteins
4 unlike virus rna, which ma
virus
contains nucleic acid
has the presence of capsid or envelope
has the presence of protein
viroid
single strand rna
no capsid/envolope, or protein
Prion
no nucleic acid, capsid/envolope
has the presence of protein
Poxvirus
size and shape
Big circle
T4 bacteriophage
size and shape
head, tail fiber
adenovirus
size and shape
circle with lines coming out
paramyxovirus
size and shape
largest, round
Tobacco mosaic virus
size and shape
long rod
picornavirus, Reovirus
size and shape
very small
Herpesvirus
size and shape
medium circle
togavirus
size and shape
small circle
Picornaviridae
+ sense RNA virus
Polio, common cold, Hep A
EX: "Enterovirus
Rhinovirus
Hepatovirus
Togaviridae
+ sense RNA virus
"Rubella (German measles)
Equine encephalitis" "Rubella virus
Equine encephalitis virus
Flaviviridae
#NAME?
Reteroviridae (contain reverse transcriptase)
+ sense RNA virus
"HTLV-I
HIV"
Adult leukemia, tumors, AIDS
Paramyxoviridae
#NAME?
Rhabdoviridae
#NAME?
Orthomyxoviridae
#NAME?
Flioviridae
- sense RNA virus
"Hep C
Yellow fever
Marburg
Ebola"
Filovirus
Bunyavirdae
#NAME?
Reoviridae
Double stranded RNA virus
Respiratory and gastrointestinal infections
Rotavirus
Adenovirdae
double stranded dna viruses
Respiratory infections
Human adenoviruses
Herpesviridae
double stranded dna virus
Oral and genital herpes, chicken pox, shingles
"Simplexvirus
Varicellovirus
Poxviridae
double stranded dna virus
Small pox, cow pox
Orthopoxvirus
Hepadnaviridae
double stranded dna virus
Hep b
Hep b virus
Papovaviridae
double stranded dna virus
Warts, cervical and penile cancers
Human papillomaviruses
Parvovirdiae
single stranded dna virus
Fifth disease in children
B19
Rhinovirus
human common cold, the colors represent different capsomers of the capsid
Genome
(head of bacteriophage) carries the genetic information necessary for replication of new phage particles
Tail sheath
retracts so that the genome can move from the bacteriophages head into the host cells cytoplasm
Plate and tail fibers
attach to specific receptor sites on the cell wall of a susceptible host bacterium
DNA is store in the.....of the bacteriophage
Head
Steps in replication of a virulent bacteriophage
1 Adsorption
2 Penetration
3 Biosynthesis
4 maturation
5 release
step one of bacteriophage replication
adsorption
phage is adsorbed onto bacterial cell wall
step two of bacteriophage replication
penetration
phage penetrates bacterial cell wall and cell membrane, phage dna is injected
step three of bacteriophage replication
biosynthesis
the phage dna directs the cells metabolism to produce viral components-proteins and copies of phage dna
step four of bacteriophage replication
Maturation
assembly of newly synthesized viral components into complete phages
step five of bacteriophage replication
release
bacterial cell lyses, releasing mature phages
Eclipse period
spans from penetration through biosynthesis
in the eclipse period mature virions are
undetected
Latent period
spans from penetration to the point of phage release
Replication of a temperate bacteriophage
following adsorption and penetration, the virus undergoes prophage formation
once established as a prophage, the virus can remain dormant for a long time through the lysogenic cycle
lysogenic cycle
period of bacterial growth with a prophage
Prophage
viral dna within the bacterial chromosome
temperate phages do
not always undergo a lytic cycle
lysogen
combination of a bacterium and a temerate phage
Bacteriophage
attachment of tail fibers to cell wall proteins
injection of viral nucleic acid through bacterial cell wall
no uncoating needed
synthesis in cytoplasm, bacterial synthesis ceased, wiral dna or rna replicated, formation of viral mrna
host cell lysis
chroni
animal virus
attachment of spikes, capsid or envelope to plasma membrane proteins
penetration through endocytosis or fusion
uncoating: enzymatic digestion of viral proteins
synthesis in cytoplasm for rna viruses and in nucleus for dna viruses, host cell synthesis is c
viron
a complete virus particle
consists of capsid, dna and sometimes envelopes
SS vs DS
single stand vs double strand
1883, A Mayer
viruses can have single strand
Replication of rna virus
-
RNA (rna polymerase) ->
RNA-mrna->protein-----
------->new viral RNA--
---->new virus
Replication of rna virus
+
RNA-mrna--> proteins---
-------->new viral RNA--
--->new virus
Replication of rna virus
HIV
Viral RNA(reverse transcriptase(R.T.))--->DNA--mRNA-->proteins & RT---
---->new viral RNA-----
--->new virus
Rhinoviruses have
canyons that attach to specific membrane proteins on the host cell membrane
HIV has
specific envelope spikes (viral glycoproteins) that attach to a membrane receptor on the surface of specific host immune defense cells
viriods differ from virus in four ways
1 each viriod consists of a single circular rna molecule of low molecular weight
2 viriods exist inside cells, usually inside of nucleolo, as particles of rna without capsids or envolopes
3 viroid rna does not produce proteins
4 unlike virus rna, which ma
virus
contains nucleic acid
has the presence of capsid or envelope
has the presence of protein
viroid
single strand rna
no capsid/envolope, or protein
Prion
no nucleic acid, capsid/envolope
has the presence of protein