Virology Flashcards
Lipid rich; host cell dervied
Envelope
Envelope
Ether stable:
Ether labile:
: Naked virus
: Enveloped virus
Compkete viral particle
Virion
Replication site
DNA:
RNA:
Nucleus
Cytoplasm
Delay in processing
Store at:
>4days delay maintain at:
4C
-70C
Transport temperature for viral culture
Refrigerator
Keeps tissue moist
Viral transport media
Saline
Trypticase soy broth
Ex.
- Stuart’s
2% fetal calf serum with Eagle’s minimum essential medium
Specimens that require VTM
Swabs, respiratory specimens, tissue specimens
When to collect viral specimens?
3-4days after onset of signs and symptoms
Isolation of virus
Nasopharyngeal swabs:
Nasal swab:
Respiratoty syncytial virus, influenza,
Parainfluenza
Rhinovrus
Anticoagulant for nucleic acid testing of blood specimens
EDTA
SPS/Heparin - culture
Cytopathic effect of rabies
Negri bodies
CPE of CMV
Owl’s Eye nuclear inclusions
CPE of adenovirus
Grapelike clusters, smudge cells
CPE of Vaccinia and variola
Guarnieri body
Koilocytes; weinkled prune nucleaus in Paps smear
HPV
Flower nuclei in T cells
HTLV-1
CPE of Measels
Warthin Finkeldey cells
Cowdry Type B cells
Enterobirus
Councilmann bodies
Yellow fever
3M’s is the CPE of
HSV
Lipschultz body, patterson bodies
Molluscum contagiosum
Decoy cells
BK virus
Bizarre astrocytes; oligodendrocyte nuclei enlarged
JC virus
Viral antigen method for HSV
Enzyme linked virus inducible system (ELVIS)
Gold standard for viral diagnosis
Cell culture
Cell culture
DNA virus grow better in:
RNA virus grow better in:
MRC5
Rhesus monkey kidney (RMK)
Viral diagnosis incubation temperature
35-37C (mostly); 33C (respiratory viruses)
For 1-4 weeks; usually 2 weeks
Fast growers (1-3 days):
Moderate growers (2-10 days):
Slow growers (7-14 days):
HSV
Influenza, entero irus, adenovirus, mumps, measles, PIV, RSV
VZV, CMV
Dewdrop on rose petal lesion
Chickenpox - HHV3 / Varicella Zoster Virus
Atypical cells: Downey cells (ballerina skirt appearance)
Epstein barr virus
Orbiting satellite
Adenovirus
Water warts / Cup-shaped crater
Molluscum contagiosum
Diagnosis of monkeypox
RT-PCR
Serotypes of genital warts
6, 11
Cervical cancer: 16, 18
Progressive multifocal leukoencephalopathy
JC virus
Smallest DNA virus
Parvoviridae
5th disease / erythema infectiosum
Parvovirus B19
Slapped cheek appearance, lacy pattern erythema, gloves and socks syndrome
Parvovirus B19
Hemorrhagic cystitis
BK virus
Largest RNA virus
Paramyxoviridae
Smallest RNA virus
Enteroviridae (Picornaviridae)
Overall largest virus
Poxiviridae