MUST TO KNOW IN VIROLOGY Flashcards
Ether-resistant
Ether-sensitive
Naked virus
Enveloped virus
Acid-labile
Acid-stable
Rhinovirus
Enterovirus
Infantile diarrhea
Rotavirus
H & N
Myxoviruses
Hemagglutination/Hemadsorption
Influenza
Parainfluenza
Mumps
Reye’s syndrome
Chicken pox
Influenza
Bronchiolitis in children
RSV
Hepatitis
Yellow fever
HBV
CMV
Reservoir of Togavirus
Birds
dsRNA
ssDNA
Reovirus
Parvovirus
Tzanck smear
HSV
VZV
Latent infection
HSV
Measles
German measles
Rubeola virus
Rubella virus
SSPE
PML
Measles virus
JC virus (polyoma)
Spongiform encephalopathy
Prion
RNA (HDV)
Viroid
Human Embryonic Fibroblast cell
CMV
PMKC, MDCK, Hen’s egg
Influenza
5th disease
6th disease
Kaposi’s sarcoma
Parvovirus B19
HHV-6
HHV-8
Marburg and Ebola
SARS
Filoviridae
Coronavirus
Bird’s flu = H5:N1
Influenza virus
Virus
Use cotton swabs
Delay of 3 days
Delay of 4 days
4’C
-70’C, not -20’C
Tissue culture
CPE
Rhinovirus
33’C
Negative stain
Gold, silver stain
PTA
EM
Hold cell culture tube
Roller drum
Father of virology
Dmitri Iwanowsky
Nucleic acid genome
DNA or RNA
Protective protein coat
Capsid
Lipid derived from host cell membrane
Envelope
DNA virus
(+) Sense RNA virus
Icosahedral
(-) Sense RNA virus
Helical
Complex
Poxvirus
Viral morphology
EM (inverted microscope)
LM
Inclusion bodies:
-Negri bodies:
-Councilman bodies:
Rabies
Yellow fever
Viral antigen
Direct IF
(G) Pock formation on CAM (Chrorioallantoic membrane)
Eggs
Passed only once
Ex. 1’ monkey kidney cells (fluvirus)
Primary cell
Passed 50x
Ex. HDF/HEK cells
Semi-continuous
MMalignant
Passed indefinitely
Ex. Hela, Hep-2
Continuous
Transport medium
Dry ice (4’C)
1. Stuart’s: viral transport medium
2. Leibovitz-Emory
3. Earles/Hanks balance salt solution
Viral growth
Cytopathic effect
Hemadsorption (ex. flu virus)
Interference:
Rubella and Enterovirus
Rounding necrosis
Enterovirus
Ballooning/Giant cells
HSV
Grapelike cluster
Adenovirus
Syncytium form
RSV
Measles
Rubella (giant cells)
Hemadsorption
Influenza
Parainfluenza
Measles
Mumps
Refractile, round cell
Rhinovirus (33’C)
Multiplication cycle
= attachment
= entry
= (-) capsid
= replication transcription translation viral CHON
= creation of new virus particle
6. Release
- Adsorption
- Penetration
- Uncoating
- Eclipse (Synthetic)
- Assembly
DNA Viruses “HHAPPPy”
Herpesvirus
Hepadnavirus
Adenovirus
Poxvirus
Papovavirus (Papilloma, Polyoma, Simian Vacuolating Virus)
Parvovirus
Rule: DNA viruses
All are dsDNA except:
All are icosahedral except:
All multiply in the nucleus except:
All are enveloped except:
Parvovirus (ssDNA)
Poxvirus (complex)
Poxvirus (cytoplasm)
PAP (Naked) -Parvovirus -Adenovirus -Papovavirus
Brick-shaped
Poxvirus
Largest DNA virus: 225 x 300 nm
Poxvirus
Poxvirus Inclusions: Guarnieri bodies
Guarnieri bodies
Vesicular skin lesions in host
Poxvirus
= smallpox
= alastrim
= cowpox (vaccine against smallpox)
a. Variola major
b. Variola minor
c. Vaccinia virus
= wartlike tumors
Molluscum contagiosum
Lab. Diagnosis:
-CPE on cell culture
-Pocks on Chorioallantoic membrane
-Viral antigens in vesicle fluid = precipitin tests, IF
-Convalescent serum phase = 4-fold increase in antibody titer
Poxvirus
Poxvirus Tx:
Methisazone
: Cause aplastic crisis (RBC: sickle cell anemia)
Parvovirus Strain B19
-5th disease
-Slapped cheeks
Parvovirus Erythema infectiosum
Hydrops fetalis: miscarriages
Parvovirus
Lab. Diagnosis:
-(+) IgM
-PCR: viral DNA from blood specimen or amniotic fluid
Parvovirus
1’ and latency infection
Herpesviridae
Herpesviridae
Alpha =
Beta =
Gamma =
HSV-1, HSV-2, VZV
CMV, HHV-6, HHV-7
EBV, HHV-8
1’ infection: Gingivostomatitis
HSV-1
Latent infection
-Herpes labialis
-Fever blister
-Cold sore
-Keratitis
Common cause of viral encephalitis
HSV-1
Latency site: Trigeminal ganglion
HSV-1
Genital herpes
HSV-2
Neonatal herpes
HSV-2