Outcome of Viral Diseases Flashcards
The agent does not replicate in dead end hosts
F
Dead end hosts do not show clinical signs, they die without signs
F
In the case of latent infection the agents are continuously shed
F
Latent infection happens when the genome of the agent is integrated in the genome of
the host
T
In the case of latent infections, the agents are continually shed
F
In latent infection, there is no virus shedding
T
Abortion is the main clinical sign of abortive infections
F
The animals do not carry the agent after recovery from an infectious disease because
the immune system eliminates it.
F
Tolerated infections result in high level of immune reaction.
F
Infection before self-recognition of the immune system can result tolerated infections
T
Infected animals have a high level of antibodies in the case of tolerated infections
F
The agent is not shed in the case of inapparent infections.
F
Dead end hosts do not shed the agent.
T
Asymptomatic infections can become manifest
T
Formation of immune complexes can be a consequence of persistent viral infection
T
When the clinical signs disappear, shedding the agent is finished
F
In the case of an abortive infection no clinical signs will be seen
T
In the case of latent infection only mild clinical signs will be seen
F
Animals with tolerated infection shed the agent
T
Only animals showing clinical signs can shed infective agents.
F
In case of inapparent infections no clinical signs can be seen
T
Latent infection is common in the case of Gram-positive bacteria.
F
In the case of inapperent infections seropositivity can be seen.
T
Inapparent infections cannot be detected in laboratory examinations
F
In case of abortive infection, the animal always aborts.
F
In case of subclinical infection, the animals can shed the agent.
T
Tolerated infection can be demonstrated only by serology
F
Abortive infection can be demonstrated only by serology.
T
During a tolerated infection the animals are seropositive.
F
In the case of latent infection no clinical signs can be seen
T
Asymptomatic infections cannot be manifest.
F
Animals do not carry the agents after recovery from an infectious disease.
F
