Is FMD a DNA virus?
The etiologic agent, FMD virus (FMDV), is a positive-sense, single-stranded RNA virus that belongs to the Aphthovirus genus, Picornaviridae family. FMDV is one of the most contagious viruses in cloven-hoofed animals and can cause both acute and prolonged, asymptomatic but persistent infection [1].
What kind of virus is FMD?
FMD is caused by an Aphthovirus of the family Picornaviridae, seven strains (A, O, C, SAT1, SAT2, SAT3, and Asia1) are endemic in different countries worldwide. Each strain requires a specific vaccine to provide immunity to a vaccinated animal.
How many strains of FMD virus are there?
Foot and mouth disease (FMD) is caused by a virus of the genus Aphthovirus, family Picornaviridae. There are seven serotypes of FMD virus (FMDV), namely O, A, C, SAT 1, SAT 2, SAT 3, and Asia 1, that infect cloven- hoofed animals. Infection with any one serotype does not confer immunity against another.
Who discovered FMD virus?
FMD virus exists as seven different serologically distinct types. Serotypes O and A were initially discovered by Vallee and Carre [14].
Is FMD virus enveloped?
FMD virus is a non-enveloped virus with a diameter of 20-30 nm. The protein coat has icosahedral symmetry and is composed of 60 copies of each of four viral capsid proteins.
How does FMD reproduce?
FMD is one of the most highly contagious diseases of animals or humans, and FMDV rapidly replicates and spreads within the infected animal, among in-contact susceptible animals, and by aerosol. Disease signs can appear within 2 to 3 days after exposure and can last for 7 to 10 days.
Why is FMD called Tiger’s heart disease?
The FMD virus often causes severe myocardial necrosis in neonatal and young pigs. This often leads to sudden deaths from myocardial failure. The mottled myocardial lesions sometimes are referred to as “tiger-heart” lesions and are useful in diagnosis.
How is FMD diagnosed?
Diagnosis. In order to diagnosis FMD, a test must be done to image the blood vessels. There are many options for imaging the arteries, including specialized blood vessel ultrasound known as duplex ultrasound; a CAT scan of the arteries which is obtained after a dye is given through the veins, or a special type of MRI.
What is FMD vaccine?
Vaccination of susceptible animals against foot-and-mouth disease (FMD) is a well established strategy for helping to combat the disease. Traditionally, FMD vaccine has been used to control a disease incursion in countries where the disease has been endemic rather than in countries considered free of the disease.
How is FMD diagnosed in cattle?
Presently FMD diagnosis is being carried out using techniques such as Virus Isolation (VI), Sandwich-ELISA (S-ELISA), Liquid-Phase Blocking ELISA (LPBE), Multiplex-PCR (m-PCR), and indirect ELISA (DIVA), and real time-PCR can be used for detection of antibody against nonstructural proteins.
Is FMD a virus or bacteria?
Hand, foot and mouth disease is a viral infection caused by a strain of Coxsackie virus. It causes a blister-like rash that, as the name implies, involves the hands, feet and mouth.
Is FMD contagious?
Hand, foot, and mouth disease is contagious People with hand, foot, and mouth disease are usually most contagious during the first week that they are sick. People can sometimes spread the virus to others for days or weeks after symptoms go away or if they have no symptoms at all.
What is the genome of FMDV?
FMDV Genome. Foot-and-mouth disease Virus (FMDV) is the prototypical member of the Aphthovirus genus, in the family Picornaviridae and is a small nonenveloped virus with a pseudo T=3 icosahedral capsid of 25-30 nm in size.
What are the characteristics of the FMDV virus?
The characteristic feature of FMDV, like other RNA viruses, is that it is genetically diverse and includes seven distinct serotypes (O, A, C, Asia-1, and SAT 1 to 3) and multiple subtypes worldwide (1).
What does FMDV stand for?
Foot-and-mouth disease virus. Foot-and-mouth disease virus (FMDV) is an aphthovirus of the family Picornaviridae and the etiological agent of the economically most important animal disease.
What is the shape of the FMDV capsid?
Inside the capsid is a 8. 4-kilobase, positive-sense, single-stranded RNA genome (making FMDV a Group IV virus in the Baltimore classification) that is covalently bound at its 5′ end to the small viral protein 3B and is polyadenylated at its 3′ end.