PRRS Coronaviridae Flashcards
PRRS is caused by an arterivirus
T
PRRS is caused by a coronavirus
F
The clinical signs of PRRS can be abortion like that of SMEDI
T
Isolation of PRRS in cell culture can be easily performed in any laboratory
F— replication in vitro is hard beacuse : Green monke african kidney cells-vero cells cotton rat …
PRRS has only highly pathogenic variants
F
Respiratory signs of PRRS occur just in sows
F
PRRS virus replicates in macrophages
T
PRRS virus replicates in T-lymphocytes
F
The pathological signs of PRRS is typical because the lymph nodes are never enlarged
F
PRRS virus affects the respiratory system in young piglets
T
PRRS cause digestive sign in adult
F
PRRS has 2 phases
T
Target cells of PRRSV are alveolar epithelial cells
F
PRRS can only be isolated in porcine kidney cells
F
PRRS causes immune suppression in prolonged cases
F
Attenuated and inactivated vaccines are available against PRRS
T
PRRS virus causes severe intestinal problems in adult pigs
F
PRRS is characterized by respiratory disease in adult pigs
F
PRRSV attacks the active macrophages
T
For PRRS prevention we can get a very good immunization with inactivated vaccines
F
PRRS: reproductive and respiratory problems and others with other virulence
T
Maternal immunity protects only short time against PRRS
T
Porcine reproductive and respiratory virus (PRRSV) can cause abortion only in the advanced stage of pregnancy (over 90 days
F
Only inactivated vaccines can be used for the prevention against PRRSV
F
Porcine reproductive and respiratory virus (PRRSV) propagates in lymphatic cells
T
PRRSV infection may influence the reproductive performance of boars
T
Porcine reproductive and respiratory virus (PRRSV) is a zoonotic agent
F
Porcine parvoviruses and PRRSV may cause similar disease in sows
T
Porcine reproductive and respiratory vines (PRRSV) does not cause clinical signs in boars
F
Inactivated vaccines alone cannot induce protective immunity against PRRSV
T
Boars can transmit porcine reproductive and respiratory syndrome virus in the semen
T
Porcine reproductive and respiratory syndrome virus cannot cause abortion, only infertility of the sows.
F
There are no vaccines for the prevention of Porcine reproductive and respiratory syndrome
F
The blue ear disease is caused by dog coronavirus
F—PRRS=Blue ear disaes
The blue ear disease is caused by FIP
F
The blue ear disease is caused by chicken coronavirus
F
The blue ear disease is caused by PRRS
T
Does PRRS virus have 3 genotypes
F
Oedema can be a sign of PRRS
T
PRRS is deadly in adult animals
F
The Porcine reproductive and respiratory syndrome (PRRS) is only present in North- America
F
The PRRS virus may cause reproductive problems in boars
T
PRRS: cyanosis is one clinical symptom
T
Human coronavirus was not known before 2020
F
Recombination between coronaviruses is frequent
T
Recombination between coronaviruses is rare
F
Coronaviruses are of two origin: bird or bat
T
Human coronaviruses usually cause death
F
Coronaviruses are enveloped viruses
T
BCoV can cause haemagglutination
T
IBV can cause haemagglutination
F
PDCoV can cause haemagglutination
F
CCoV can cause haemagglutination
F
TGEV can cause haemagglutination
F
FIPV can cause haemagglutination
F
HeCoV can cause haemagglutination
T
PEDV can cause haemagglutination
F
Coronaviruses can survive for months in the environment
F
Coronaviruses frequently mutate and recombine
T
Coronaviruses have a weak physical resistance
T
Typical sign of TGE is vomiting and diarrhoea
T
TGE virus does not reach the mammary gland
F
TGE virus can replicate in the lungs
T
The colostral immunity against TGE protects the piglets from the disease
T
The antibodies against porcine respiratory coronavirus protect the pigs against TGE
T
TGE virus does not reach foetuses
T
TGE virus does not cause haemagglutination in vitro
T
TGE virus can cause haemagglutination in vitro
F
TGE can cause 100% mortality in newborn piglets
T
TGE virus causes respiratory signs in piglets
F
The pathology of TGE is not characteristic
T
TGE virus does not cause dehydration
F
The pathognomonic sign of TGE is necrosis in the large intestine
F
TGE virus can replicate in the intestine
T
Porcine transmissible gastroenteritis (TGE) is completely eradicated in Europe
F
TGE causes 100% mortality in sows
F
The incubation time of TGE is usually 5-7 days
F
TGE virus infects the digestive and the respiratory systems
T
TGEV is widespread and fully replaced porcine epidemic diarrhoea (PED) virus
F
Porcine respiratory coronavirus induces cross-protection against PED
F
Today TGE occurs in an enzootic form
T
The characteristic symptoms of TGE are vomiting and diarrhoea
T
TGE infects only swine
F
TGE virus causes high morbidity
T
Transmissible gastroenteritis is the more severe in piglets than in adult swine
T
The mortality caused by transmissible gastroenteritis of swine is the highest among old sows
F
Transmissible gastroenteritis of swine is a widespread disease, causing high losses in Europe
F
The lesions of transmissible gastroenteritis of swine are in the gastric mucosa and in the small intestine
T
Transmissible gastroenteritis of pigs is more frequent in the tropical countries that the moderate climate
F
There is no cross protection between transmissible gastroenteritis vines and the pulmonary coronavirus of pigs
F—there is also same vaccine
Transmissible gastroenteritis virus can cause clinical disease only in pigs
T
Transmissible gastroenteritis virus spreads rapidly in the herd
T
The epizootic TGEV spreads rapidly
T
The epizootic TGEV can cause disease mainly in winter
T
The epizootic TGEV can be transmitted with milk
T
The epizootic TGEV does not cause viraemia
F
Transmissible gastroenteritis virus provides cross protection to hemagglutinating coronavirus
F
TGE mainly cause croupous pneumonia
F
TGE replaces the respiratory corona virus
F
TGE appears in Hungary
T
TGE causes 100% mortality in susceptible piglets under 1 week of age
T
Porcine transmissible gastroenteritis is completely eradicated in Europe
F
PED is similar to TGE
T
The incubation time of TGE is usually 1-3 days
T
TGE virus infects the digestive and the respiratory system
T
Only pigs are susceptible to TGE infection
F
Maternal immunity is essential against TGE infection of piglets
T
Today TGE occurs in epizootic form
T—in winter
TGE is completely eradicated in Europe
F
Transmissible gastroenteritis is usually asymptomatic in adults
T
Transmissible gastroenteritis virus can cause clinical signs in dogs
F
The Porcine respiratory coronavirus has been evolved from the Transmissible gastroenteritis virus
T
Porcine respiratory coronavirus induces cross-protection from transmissible gastroenteritis
T
TGE infection is devastating at any age
F
The incubation period of TGE can be as short as 8 hours
F
Pig has betacoronavirus
T