Coronavirus Flashcards
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
In the case of transmissible encephalopathies always degenerative lesions can be seen
T
In the case of transmissible encephalopathies meningoencephalitis is a typical postmorten lesion
F
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 causes respiratory signs in piglets
False
Replicates in the lung, but does not cause any respiratory signs
TGE virus can cause haemagglutination in vitro
F
TGE can cause 100% mortality in newborn piglets
T
The pathology of TGE is not characteristic
T
TGE virus does not cause dehydration
F
The pathognomic sign of TGE is necrosis in the large intestines
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
Dog, fox and mouse can shed the virus –> seropositive without disease
TGE virus causes high morbidity
T
Transmissible gastroenteritis is the more severe in piglets than in adult swine
T
The mortality caused by transmissible gastroenterities 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 intestines
T
Transmissible gastroenteritis of pigs is more frequent in the tropical countries than the moderate climate
F
There is no cross protection between transmissible gastroenteritis virus and the pulmonary coronavirus of pigs
F
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 haemagglutination coronavius
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
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
Pigs has only alphacoronavirus
F
The porcine coronavirus may be avian virus
T
The antibodies against porcine respiratory coronavirus protect the pigs against porcine epidemic diarrhoea virus
F
Mutations and recombinations do not occur in swine coronaviruses
F
PRCoV usually causes pneumonia
F
Porcine respiratory coronavirus causes acute pneumonia in susceptible piglets
F
Porcine respiratory coronavirus reduced the prevalence of porcine epidemic diarrhoea
F
Porcine respiratory coronavirus induces cross protection from TGE
T
Swine pulmonary corona virus has a high mortality by pneumonia
F
Porcine respiratory coronavirus is a modification of the Hemagglutinating encephalomyelitis cirus
F
PRCoV gives cross protection against TGEV
T
PDCoV causes symptoms in pigs
T
Porcine respiratory coronavirus causes acute pneumonia in susceptible piglets
F
Porcine epidemic diarrhea can cause clinical signs in older animals
T
The virus causing porcine epidemic diarrhea can replicate in the colon
T
PEDV also occurs in Europe
T
The porcine epidemic diarrhea virus causes disease in calf
F
Porcine epidemic diarrhea virus can cause disease in humans
F
The virus causing porcine epidemic diarrhea can replicate in the heart muscle of the foetus
F
Porcine epidemic diarrhea virus causes more severe symptoms in adult than in young piglets
F
Porcine epidemic diarrhea is present only in Africa and in the Middle East
F
Porcine epidemic diarrhea usually resembles TGE
T
Porcine epidemic diarrhea can be transmitted by infected dogs and cats
F
Porcine epidemic diarrhea frequently occurs in Europe
F
PHEV gets to central nervous system via the peripheral nerves
T
PHEV causes diarrhea
F
Hemagglutination encephaomyelitis virus infects young pigs
T