Reoviridae Flashcards
Orbiviruses spread by droplet (aerosol) infection
F
Orbiviruses can be cultivated in vivo by inoculation of embryonated eggs
T
Genetic reassortments may cause significant antigenic changes in reovirus strains
T
Orbiviruses are serologically uniform
F
Orbiviruses are mainly arboviruses
T
Reoviruses are sensitive to lipid solvents and detergents
F
Orthoreoviruses can cause pneumoenteritis in calves
T
Orthoreoviruses can cause pneumoenteritis in cattle
T
Avian orthoreo –and rotaviruses can cause runting sunting syndrome in chickens
T
Avian orthoreoviruses cause mainly nephritis and encephalitis
F
Avian orthoreoviruses usually transmitted by germinative route
T
Avian orthoreoviruses can cause damages in the bursa Fabricii
T
Mammalian orthoreoviruses can cause pneumoenteritis only in suckling animals
F
Orthoreovirus can cause tenosynovitis in pigs
F
Avian orthoreoviruses usually cause disease in adult birds
F
Tenosynovitis is one of the most frequent manifestations of avian orthoreovirus infections
T
Trypsin-sensititive avian orthoreovirus usually cause respiratory disease in birds
T
Yolk immunity does not influence the efficacy of vaccination against avian orthoreovirus
F
Avian orthoreoviruses may cause necrotic foci in the visceral organs of birds
T
Avian orthoreoviruses can cause inapparent infection in poultry
T
Orthoreoviruses can be detected by haemagglutination test.
T
Trypsin resistant strains of Avian orthoreoviruses frequently cause diarrhoea
T
Trypsin sensitive strains of avian orthoreoviruses frequently cause tenosynovitis
T
Horses usually develop lethal hemorrhagic enteritis in Orthoreovirus infections
F
Infection of adult birds with Orthoreoviruses usually remains subclinical
T
Orthoreoviruses can cause encephalitis in cattle
F
Avian orthoreoviruses can cause poult enteritis-mortality syndrome (PEMS).
T
Infectious tenosynovitis can be prevented by vaccination
T
Avian orthoreoviruses infect only via inhalation and parenterally
F
Avian orthoreoviruses only infect via PO infections
F
All Avian orthoreoviruses can spread germinatively
T
Helicopter disease causes feather problems
T
Orthoreovirus infections cause immunosuppression in birds
T
Tenosynovitis is a frequent sign of Avian Orthoreovirus infection
T
Orthoreovirus mainly infects younger animals
T
Orthoreovirus causes respiratory and GI disease
T
Tenosynovitis is caused by only one Orthoreovirus
F
Orthoreoviruses frequently cause tenosynovitis of horses
F
Rotaviruses are sensitive to environmental conditions
F
Rotavirus infection is sporadic within the herd
F
Rotavirus only infects mammals
F
Clinical signs of rotavirus infection are usually seen in animals older than 2 weeks of age
F
Swine is not susceptible to rotavirus infection
F
Rotaviruses predispose to E.Coli infection in suckling piglets
T
Rotaviruses are shed in the faeces in high titres
T
Rotavirus infection results in high mortality
F
Avian rotaviruses are transmitted by germinative infection
F
Losses due to rotavirus infection of young animals can be prevented by colostrum feeding
T
Rotaviruses usually cause enteritis in young (1-2 weeks old) animals
T
Rotaviruses damage the mucosa of the large intestines
F
Rotaviruses are serologically uniform
F
Rotaviruses are typically transmitted via the faecal oral route
T
Swine rotavirus infection is frequently followed by E. coli secondary infection in piglets
T
Avian rotaviruses can cause tenosynovitis
F
Rotaviral enteritis of calves can be prevented by immunization of pregnant cows
T
Rotaviruses can cause chronic enteritis and persistent infection
F
Rotaviruses cause mainly respiratory signs in cattle
F
Rotaviruses mainly cause respiratory disease in older animals
F
Rotaviruses typically cause respiratory disease in 3-6 month old calves
F
Rotavirus is species specific
F
Rotaviruses frequently cause tenosynovitis in birds
F
Vaccination of horses in the Americas is used to prevent rotavirus infections
T
Bluetongue is present only in tropical areas
F
Rodents serve as reservoirs of bluetongue
F
Ibaraki disease is clinically very similar to bluetongue
T
Ibaraki disease virus can be used to immunize cattle against bluetongue
F
Lameness is a frequent symptom of bluetongue in sheep
T
Bluetongue virus can cause bloody diarrhoea in lambs
T
Bluetongue is named after cyanosis of the tongue
T
The bluetongue virus is vectored by midges/ gnats
T
Cattle can carry the bluetongue virus for years without symptoms
T
Wild birds play the most important role in the distribution of bluetongue
F
In Europe vaccination of small ruminants against bluetongue is mandatory
F
Bluetongue virus is also foetopathic
T
Bluetongue virus may cause foetal developmental problems
T
Lameness and abortion are signs of bluetongue
T
Bluetongue occurs only in Africa and Australia
F
Bluetongue is transmitted by ticks
F
Bluetongue virus is typically vectored by ticks
F
Bluetongue can be transmitted by semen
T
Goats are more resistant to the bluetongue than sheep
T
Goats are not susceptible to bluetongue virus
F
Vaccination against Bluetongue results serotype specific immunity
T
Bluetongue disease occurs only in Africa
F
Bluetongue virus infects also horses and dogs
F
Endothelial damages are the most important causes of the clinical signs of bluetongue
T
A serotype 8 of bluetongue virus strain caused severe outbreak in Europe in 2006-2009
T
Bluetongue outbreaks mainly occur is summer and autumn
T
Sheep are less sensitive to Bluetongue than swine
F
Bluetongue causes transient infection in cattle
F
Bluetongue vaccines induce serotype-specific immunity
T
Bluetongue is named after the pseudo-melanosis of the tongue
F
Bluetongue infects also horses and dogs
F
Ibaraki disease virus immunizes against bluetongue
F
Bluetongue disease is present only in tropical and sub-tropical countries
F
Wild birds are the natural reservoir host of the Bluetongue virus
F
In utero Bluetongue virus infection may result in immunotolerance
T
The most severe clinical manifestation of Bluetongue disease is usually seen in goats
F
Bluetongue is an Orbivirus
T
Bluetongue primarily spreads with blood sucking insects
T
Bluetongue replicates in endothelial cells of blood vessels
T
The causative agent of Bluetongue multiplies in endothelium
T
Bluetongue has 24 known serotypes
F
Bluetongue is an enteral disease of turkeys
F
Bluetongue causes symptoms mostly in sheep and goat
F
Bluetongue is not present in Europe
F
Bluetongue causes skin signs in bovine
T
Bluetongue also infects pigs
F
Bluetongue infects all hooved animals
F
No long-term carrier stage is observed in Bluetongue virus infections
F
Ruminants and swine are the most important hosts of the Bluetongue virus
F
Lameness is one of the clinical signs of Bluetongue disease in sheep
T
Serological cross protection exists between 25 known serotypes of Bluetongue virus
F
Ibarki disease is a Bluetongue-like disease in Asia and in America
T
The serotype 8 strain of the bluetongue virus, which emerged in Western Europe, does not cause clinical signs in cattle
F
The epizootic haemorrhagic fever is observed in the USA in wild deer
T
Epizootic haemorrhagic disease was described only in Australia so far
F
Epizootic hemorrhage fever is a Bluetongue-like disease of wild ruminants in America
T
African horse sickness is mostly a peracute disease
F
African horse sickness virus is endemic in Russia since 2008
F
he Infectious equine arthritis and the African horse sickness ay have similar clinical signs
T
Oedemas and haemorrhages are the most frequent lesions in African horse sickness
T
African horse sickness is spread by ticks
F
African horse sickness is zoonotic
F
Frothy nasal discharge is a characteristic sign of African horse sickness
T
The subacute form of African horses sickness is causing oedema formation and heart failure
T
Encephalitis is the most frequent sign of African horse sickness
F
Acute form of African horse sickness occurs mainly in zebras and horses
F
Carnivores are susceptible to African horse sickness
T
Occasionally carnivores may get infected with African horse sickness virus
T
Subcutaneous oedema is a frequent symptom of subacute African horse sickness
T
Zebras are more resistant to African horse sickness than horses
T
Immunized horses may develop a chronic febrile form of the African horse sickness
T
Zebras are not susceptible to African horse sickness
F
Wild birds play the most important role in the spreading of African horse sickness
F
The chronic form of African horse sickness may be similar to EIA
T
African horse sickness is a communicable disease
T
In the pathogenesis of African horse sickness, viraemia lasts longer in horse than in zebras
F
The African horse sickness is endemic in Europe and in the USA
F
The signs of chronic African Horse Sickness and Equine Infectious anaemia may be similar
T
The natural reservoirs of the African Horse Sickness virus are mainly zebras
T
African horse sickness was transported to Europe by migratory birds
F
African horse sickness can cause encephalitis
F
African horse sickness is a notifiable (communicable) disease in Europe
T
African horse sickness can cause lung oedema
T
African horse sickness is prevented in Africa by combined vaccines
T
African Horse Sickness is a frequent disease, distributed worldwide
F
Respiratory signs are the most frequent symptoms in acute African Horse Sickness
T
The differential diagnosis of African Horse Sickness and Tetanus is rather complicated
F
African Horse Sickness is spread primarily by “small mosquitos”.
F
Carriers for African Horse Sickness are zebras and donkeys
T
African Horse Sickness is not present in Europe today
T
African Horse Sickness is caused by an arbovirus
T
African Horse Sickness is caused by Orbivirus
T
The most characteristic post mortem lesion in African Horse Sickness is haemorrhages and oedema.
T
Reservoir for African Horse Sickness is zebras and donkeys
F
African Horse Sickness is presented mainly per-acutely in donkeys
F
African Horse Sickness virus only infect horses
F
Horses are more susceptible than zebra in African Horse Sickness
T
Haemorrhagic meningoencephalitis is the most frequent sign of the African Horse Sickness
F
The African Horse Sickness virus may infect dogs too
T
African horse sickness is a world-wide distributed and frequent disease
F
The subacute form of the African horse sickness is mainly characterized by oedematisation and cardiac dysfunctions
T
Horse encephalosis is endemic in Africa
T
Equine encephalosis can result in abortion
T
Equine encephalosis is transmitted by mosquitoes
T
Equine encephalosis causes the most severe clinical signs in Zebras
F
Horse encephalosis occurs only in America
F
Equine encephalosis causes high mortality
F
Attenuated and inactivated vaccines are available against equine encephalosis
F
Horse encephalosis appeared several times in Europe between 2006 and 2009
F
Midges are the main vectors of the Equine encephalosis virus
T
Bursitis virus targets the premature B lymphocytes
T
The orthohepevirus A causes clinical symptoms only in human
T
The Orthohepevirus A can be zoonotic
T
The avian hepatitis E is a zoonotic disease
F
The avian hepatitis E causes drop in egg production
T
Hepatitis E virus causes characteristic clinical symptoms in swine
F
Avian nephritis is caused by astroviruses
T
The mortality of avian nephritis is 50-60%
T
Avian nephritis replicates in the gut
T
Broilers are regularly vaccinated against avian nephritis virus
F
Urate deposition is a postmortem lesion of avian nephritis
T
Clinical signs of avian nephritis can be seen in the first four weeks of life
T
Avian nephritis virus usually causes diseases in chickens of 1-3 weeks of age
T
Avian nephritis is more frequent in waterfowl than in chicken
F
Avian nephritis virus caused by a picornavirus
F
Only chickens are susceptible to avian nephritis virus
T
Avian nephritis virus is transmitted by rodents
F
Chickens are frequently seropositive for avian nephritis
T
Attenuated vaccines are used for the prevention of chicken from avian nephritis virus
F
