avian herpes hardcore Flashcards
The infectious laryngotracheitis is seen only in young chickens
F
not only chicken - quails turkey peacocks pheasants but also most common after 6 weeks old
Diarrhoea is frequent in infectious laryngotracheitis of chickens
Flocal infection in the upper third of the respiratory tract
Infectious laryngotracheitis virus strains may differ in virulence
Tlow and high mild and typical forms
The infectious laryngotracheitis causes pseudomembrane formation in the oesophagus
F
ILT= cheesy plugs, haemorrhages, fibrin precipitations=Pseudomembranes= cheesy plugs?
Inflammatory exudate rich in fibrin coagulates onto the endothelium of the respiratory tract = trachea
Not oesophagus = Upper 3rd resp tract limited
Mortality of infectious laryngotracheitis can go up to 50%.
T
Transient paralysis form of Marek’s disease can be present in 6-week-old chicken
T
The vaccines of Marek’s disease are not efficient
F
The turkey herpesvirus causes cross immunity against Marek’s disease
T
Lymphoproliferative form of Marek’s disease can be present in 6-week-old chicken
T
Clinical signs of Marek’s disease present rare, because of vaccination
T
vaccination is effective
Transient paralysis form of Mareks disease can be present in hens
F
hens are old transient paralysis 4-7 weeks
Intake of GaHV2 happens most frequently per os
Fvirions in the air
Signs of Marek disease may be very similar to reticuloendotheliosis signs
T
Transient paralysis by Marek’s disease usually ends in full recovery
Fdeath or visceral
Humoral immunity plays the central role in the host’s defence against the Marek’s disease virus
F
As MDV is a cell-associated herpes virus and is strictly intracellular, antibodies should not have a major role in the protective immunity against MDV infection.
The acute form of Marek ́s disease is characterized by lymphoid cell proliferation
T
The incubation time of acute Marek ́s disease is 1-2 days
F
4-6 weeks and chronic 0.5-1 year
Marek’s disease only occurs in domestic fowl.
T
We can differentiate Marek’s disease from reticuloendotheliosis only by lab diagnostics methods
T
Conjunctivitis is a frequent sign of duck viral enteritis
T
Duck plague virus may be shed life long by animals recovered from the disease
T
Duck Plague/Duck viral Enteritis cause high mortality in all ages
F
ducklings less susceptible
Duck Plague virus can “settle” in wild ducks
T
Duck Plague is an outbreak of Avian influenza in ducks, with a host-adapted version of the virus
F
Duck Plague only causes disease in ducks and geese
F
also swans
Duck Plague virus causes high mortality in both old and young birds
F
mainly old
Pigeon herpesvirus mainly causes encephalitis in adult pigeons
F
Pigeon herpesvirus infections usually result a haemorrhagic deadly disease
F
Pigeon herpesvirus is characterised by focal necrosis in the liver in pigeons
T
Pigeon herpesvirus kills mostly day old pigeons
Flater in life infection has CS day old protected from maternal yolk immunity
Pigeon herpesvirus infection is related to Marek’s disease
T
Mardivirus genus
