Epi midtern 1- from the top part 3 Flashcards
Germinative infection can happen in birds.
true
Galactogen infection is a form of horizontal infections.
false
Aerogenic infection is a form of direct infection.
false
If an agent is transmitted by the veterinarian, we speak about iatrogenic infection.
true
Euryxen agents can infect many host species
true
The LD50 value shows the virulence of a strain.
true
The virulence of an agent is a stable characteristic of it
false
A minimum amount of the agent is necessary to cause disease.
true
Subacute diseases last one or 2 days.
false
Mortality shows the proportion of dead animals compared to the number of diseases ones.
false
Monitoring is routine collection of data on a disease.
true
Pandemic disease occurs in large areas, continents
true
The principle of “all in all out” is an important way of prevention of infectious diseases
true
Isolation of age groups is an important way of prevention of infectious diseases
true
Maternal protection occurs only in mammals.
false
Colostrum is the main way of maternal protection in the case of animals with epitheliochorial placenta.
true
Circovirus can easily be cultured in different homologous cell lines.
false
Swine circovirus causes lesions in multiple organs and strong immunosuppression.
true
For prevention of Swine circovirus disease only general hygienic measures can be used.
false
Swine circovirus can cause retarded growth and strong immunosuppression.
true
Swine circovirus caused disease occurs worldwide, it is frequent.
true
Circovirus in geese and ducks can cause retarded growth and feather formation
disturbances.
true
Infectious Chicken Anemia virus can cause clinical signs only in layer hens.
false
Resistance of circovirus is very low, in the environment they are inactivated within a day
false