Which disease is caused by pox virus?

These include monkeypox virus, orf virus, molluscum contagiosum, and others. While some poxviruses, such as smallpox (variola virus), no longer exist in nature, other poxviruses can still cause disease. Smallpox is a serious, contagious, and sometimes fatal infectious disease.

How is pox virus transmitted?

Animal-to-human transmission may occur by bite or scratch, bush meat preparation, direct contact with body fluids or lesion material, or indirect contact with lesion material, such as through contaminated bedding. Human-to-human transmission is thought to occur primarily through large respiratory droplets.

Is pox virus the largest virus?

Poxviruses are the largest and most complex viruses. They are linear double-stranded DNA viruses of 130-300 kilobase pair. The 200-400 nm virion is oval or brick-shaped and can be visualized on light microscopy.

What does vaccinia virus cause?

The history of the vaccinia virus is that of smallpox, a serious illness characterized by the eruption of small pocklike lesions throughout the skin and internal organs. This is distinct from the great pox of syphilis. The variola virus causes smallpox and may have begun infecting humans approximately 10,000 years ago.

Is chickenpox is a communicable disease?

Chickenpox is a highly contagious disease caused by the varicella-zoster virus (VZV). The virus spreads easily from people with chickenpox to others who have never had the disease or never been vaccinated.

Is smallpox RNA or DNA?

Smallpox is a double-stranded, 135- to 375-kilobase (kb) DNA virus that replicates in the cytoplasm of the host cell and forms B-type inclusion bodies (Guarnieri bodies). This is in contrast to herpes viruses, which replicate in the nucleus. The orthopoxviruses are among the largest and most complex of all viruses.

How is pox virus diagnosed?

Diagnosis. The diagnosis is often suggested by the presence of skin lesions and a history of contact with human or animal cases. Diagnosis is confirmed by electron microscopy and/or virus isolation.

Why is it called pox virus?

The name of the family, Poxviridae, is a legacy of the original grouping of viruses associated with diseases that produced poxes in the skin.

Why does pox virus replicate in cytoplasm?

Poxviruses encode for more than 250 proteins, including the machinery that enables these viruses to carry out both transcription and replication in the cytoplasm (5). The com- plex life cycle of poxviruses thus occurs largely in the cytoplasm, although nuclear factors may be required for intermediate transcription (6).

Does pox virus have an envelope?

Poxviruses are large, enveloped viruses that replicate in the cytoplasm and encode proteins for DNA replication and gene expression.

What type of virus is vaccinia virus?

Vaccinia virus (VACV or VV) is a large, complex, enveloped virus belonging to the poxvirus family. It has a linear, double-stranded DNA genome approximately 190 kbp in length, which encodes approximately 250 genes. The dimensions of the virion are roughly 360 × 270 × 250 nm, with a mass of approximately 5–10 fg.

Which family does vaccinia virus belong?

Poxvirus
Vaccinia virus/Family