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VIROLOGY

 


VIROLOGY

What is meant by VIROLOGY?

 It is part of microbiology or pathology which deals with viruses or viral agents, their taxonomical properties, disease producing properties, cultivation and genetics..


There are different types of viruses - mainly ENVELOPED & NON ENVELOPED

Viruses are seen only under ELECTRONIC MICROSCOPE.

Only one virus is big enough to see under LIGHT MICROSCOPE ie POX VIRUS.

LARGEST VIRUS - POX VIRUS

SMALLEST VIRUS - PARVO VIRUS

NON ENVELOPED / NAKED VIRUS  are more RESISTANT.

ENVLOPED VIRUS are more SENSITIVE.

All DNA virus are DOUBLE STRANDED except  PARVO VIRUS.

All RNA virus are SINGLE STRANDED except REO VIRUS.


MEMONICS:

How to remember DNA VIRUSES ?

HHAPPPPy

H-  HERPES VIRUS

H - HEPATITIS VIRUS

A - ADENO VIRUS

P -  POX VIRUS

P -  PARVO VIRUS

P - POLYOMA VIRUS

P - PAPILLOMA VIRUS


2. Naked viruses:

Give  PAPP smears and  CPR to a naked virus

DNA: 

P - PARVO

A - ADENO

P - POLYOMA

P - PAPILLOMA


RNA: 

C - CALCI

P - PICORNA

R - REO VIRUS

HEPATITIS E.


3. HELICAL SYMMETRY:

M- MYXO VIRUS

R- RHABDO

F- FILO


4. PICORNA VIRUS

P- POLIO VIRUS

E- ECHO 

R- RHINO 

F- COX SACKIE VIRUS

H- HAV


5. HEPATITIS VIRUS

Pappu--- Hep A --- PICORNA

Hero--- Hep B --- HEPADNA

Failed--- Hep C--- HAVI 

In the--- Hep D--- DELTA

Class--- Hep E --- CALCI VIRUSES


6. DNA VIRUSES REPLICATE IN NUCLEUS.

7. RNA VIRUSES REPLICATE IN CYTOPLASM.

Only DNA VIRUS WHICH REPLICATE IN CYTOPLASM IS POX VIRUS.

Only RNA VIRUS WHICH REPLICATE IN NUCLEUS IS HIV.


8. NEGATIVE STRANDED VIRUSES:


Always --- ARENA VIRUS.

Bring --- BUNYA VIRUS.

Polymerase --- PARAMYXO VIRUS.

or --- ORTHOMYXO VIRUS.

Fail --- FILO VIRUS.

Reaction --- RHABDO VIRUS.


                                                                                                     by,

                                                                                                Dr Sneha.










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