Virology (week 3 and 4)

Large complex structured viruses with a single molecule of ds DNA

Large complex structured viruses with a two molecules of ds RNA

Large complex structured viruses with a single molecule of ss DNA

Small complex structured viruses with a single molecule of ss DNA

Raised, reddened macule-->papule--> fluid filled vesicle-->Ruptures to form a crater (pock)-->Scarring

papule--> Raised, reddened macule--> fluid filled vesicle-->Ruptures to form a crater (pock)-->Scarring

fluid filled vesicle-->papule--> Raised, reddened macule-->Ruptures to form a crater (pock)-->Scarring

Endemic in SE Europe, Middle East, Africa and Asia

Endemic in North America, Northern Europe and Australia

Endemic in North America and Australia

Endemic in North America, the UK, Africa and Asia

~ 1 week

~ 3 weeks

~ 2 weeks

~ 1 day

Avipoxvirus

Capripoxvirus

Orthopoxvirus

Parapoxvirus

A poxvirus disease of rabbits

A papillomavirus disease of dogs

A poxvirus disease of dogs

A poxvirus disease of cats

They are complex enveloped double stranded DNA virus

They are complex enveloped single stranded DNA virus

They are complex non-enveloped double stranded DNA virus

They are complex enveloped double stranded RNA virus

They are complex non-double stranded RNA virus

Yes

No

In the reticuloendothelial system

In the respiratory sytem

In the nervous system

In the gastrointestinal system

Yes

No

Enveloped double stranded DNA viruses

Non-Enveloped double stranded DNA viruses

Enveloped single stranded DNA viruses

Non-enveloped single stranded DNA viruses

They are enveloped viruses

They are non-enveloped viruses

They are capsulated viruses

Close or mucosal contact for transmission (droplet)

GIT transmission

Vector transmission

They cause a lifelong latent infection

They cause 100% mortality in the infected

Infection results in lifelong immunity

Respiratory route and cell associated viraemia to distant sites

GIT route

Fomites

Vector transmission

Fatal meningoencephalitis in calves thought to be due to direct neural spread from nasopharynx via trigeminal nerve

Respiratory disease, abortion and neurological disease in foals

Acute respiratory disease characterised by nasal discharge and lymphadenopathy in calves

A variety of clinical diseases

Equine herpesvirus 1

Equine herpesvirus 4

Bovine herpes virus 1

Equine sarcoid virus

African horse sickness

Usually late gestation

Usually early gestation

Usually mid gestation

Abortions do not usually occur

1‐2 days from reproductive tract and up to 2 weeks from the respiratory tract

5-10 days from reproductive tract and up to 6 weeks from the respiratory tract

5‐6 days from reproductive tract and up to 4 weeks from the respiratory tract

ELISA test for antibody

Electron microscopy

Viral culture

Weanling and yearlings (juveniles)

Adults

Old horses

acute respiratory disease characterised by nasal discharge, ocular discharge, sneezing, dyspnoea and occasional oral ulcers

fatal meningoencephalitis in kittens thought to be due to direct neural spread from nasopharynx via trigeminal nerve

abortion of kittens during late gestation

generalised skin lesions. Nodules & necrosis of the superficial epidermis

Infectious laryngotracheitis

Gallid rhinopneumonitis

Gallid encephalitis virus