Bovine Viral diarrhoea Flashcards
BVDV can be frequently detected in the background of respiratory diseases
True
BVD virus is particularly resistant to disinfectants
False
Rodents play a central role in the maintenance of BVD virus in the environment
False
Cytopathic and non-cytopathic biotypes of the Bovine Viral Diarrhoea (BVD) virus are known
True
In utero infection with non-cytopathic BVDV can cause seropositivity of the newborn calf
True
Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause hydrocephalus and cerebellar hypoplasia
False
In utero infection with non cytopathic BVDV can cause immunotolerance
True
In utero infection with cytopathic BVDV strain results immunotolerant calves
False
Swine are not susceptible to BVD
False
Two serotypes of the BVD virus are known so far, serotype 2 is more virulent
True
False? 2 genotypes but 1 serotype?
Pigs infected with BVDV turn seropositive to classical swine fever
True
Persistently infected cattle can maintain BVDV in a farm
True
Cytopathic strains of Bovine Viral diarrhoea (BVDV) alone can cause mucosal disease
False
Non-cytopathic BVD virus strain can mutate and become cytopathic
True
The BVD virus can infect pigs also
True
Cytopathic strains of the Bovine Viral Diarrhoea virus (BVDV) can cause abortion
True
Non cytopathic strains of Bovine Viral Diarrhoea virus (BVDV) do not cause transplacental infection
False
Intrauterine BVD virus infection always causes abortion
False
Cattle which are immune tolerant to BVD virus may develop mucosal disease
True
In sheep BVDV causes symptoms similar to border disease
True
Mucosal disease can develop in cattle persistently infected with BVDV
True
Non cytopathic strains of Bovine viral diarrhoea virus (BVDV) can cause immunosuppression
True
BVDV can be transmitted by semen
True
BVD virus cannot be transmitted via artificial insemination
False
In mucosal disease sharp edged, usually round or oval ulcers can be observed on the oral mucosa
True
In mucosal disease haemorrhages can be observed under the serosal surfaces and in the
kidney cortex
True
Bloody diarrhoea is a clinical sign of the mucosal disease
True
BVD virus cannot be propagated in cell cultures
False
Mucosal disease usually emerges in cattle farms as explosive outbreaks with high morbidity
False
BVD and mucosal disease are caused by the same viral species
True
Attenuated vaccine strains against the bovine viral diarrhoea virus may have foetopathic effects
True
Eradication programmes against the bovine viral diarrhoea virus are usually based on the selection of immunotolerant animals
False
Eradication of BVD virus is based on the removal of immunotolerant animals
True
The only efficient way of BVD eradication is the replacement of all animals on the farm
False
Two genotypes of the BVDV are known
True
BVDV forms one serotype, but there are significant antigenic differences between the strains
True
Persistently infected animals play the major role in the maintenance and spread of BVDV
True
BVDV infection may cause immunosuppression
True
Bovine neonatal pancytopenia (BNP) is an immunopathy observed in immunotolerant, BVDV infected calves
False
Bovine neonatal pancytopenia (BNP) is caused by a bovine viral diarrhea
False
The BVD virus typically damages endothelial-, epithelial- and lymphatic tissues
True
Wild birds are the natural hosts of the BVDV
False
Environmental contamination does not play a role in the spread of the BVDV
False
Only inactivated vaccines can be used for the prevention against BVD
False
The BVD virus genotype 2 is less virulent than genotype 1
False
The BVD virus cannot be transmitted via artificial insemination
False
BVD clinically is mostly seen in cattle from 6 to 24 months of age
True
BVD virus can cause severe damage to fetuses in pregnant cows
True
Only cattle is susceptible to BVD virus
False
BVD virus exists in several serotypes
False
BVD infection of pregnant cows can result in delivery of immunotolerant persistently
infected calves
True
Bulls can shed BVD virus for long time in semen, without showing any clinical sign
True
Both attenuated live and inactivated vaccines are used in eradication of BVD
True
BVDV cannot be propagated in cell cultures
False
BVDV is practically sensitive to disinfectants
True
Rodents play a central role in the maintenance of BVD virus in the environment
False
Bovine Viral Diarrhoea cannot be transmitted with AI
False
The BVD virus typically damages endothelial epithelial- and lymphatic tissues
True
Mucosal Disease, only inactivated vaccines can be used for the prevention against BVD
False
Cytopathic BVDV strains cause mucosal disease in immune-tolerant calves
True
Because Europe is free from BVD, it is forbidden to use vaccines against it
False
Because IBDV is an immunosuppressive virus, no vaccines available against it
False
