How do you describe varicella?
Chickenpox is a highly contagious illness caused by the varicella-zoster virus (VZV), a type of herpes virus. It is often a mild illness, characterized by an itchy rash on the face, scalp and trunk with pink spots and tiny fluid-filled blisters that dry and become scabs four to five days later.
What is the characteristics of varicella-zoster virus?
Varicella is characterized by fever concurrent with a self-limiting rash on the skin and sometimes mucosa. Headache, malaise, and loss of appetite are also seen. The rash begins as macules, rapidly progresses to papules, followed by a vesicular stage and crusting of lesions. Crusts slough off after 1 to 2 weeks.
What does the varicella virus look like?
The rash begins as many small red bumps that look like pimples or insect bites. They appear in waves over 2 to 4 days, then develop into thin-walled blisters filled with fluid. The blister walls break, leaving open sores, which finally crust over to become dry, brown scabs.
How would you describe zoster?
Herpes zoster is viral infection that occurs with reactivation of the varicella-zoster virus. It is usually a painful but self-limited dermatomal rash. Symptoms typically start with pain along the affected dermatome, which is followed in 2-3 days by a vesicular eruption.
Is varicella droplet or airborne?
Chickenpox is usually acquired by the inhalation of airborne respiratory droplets from an infected host. The highly contagious nature of varicella-zoster virus (VZV) underlies the epidemics that spread quickly through schools.
What is varicella characteristics and treatments?
Chickenpox is an infection caused by the varicella-zoster virus. It causes an itchy rash with small, fluid-filled blisters. Chickenpox is highly contagious to people who haven’t had the disease or been vaccinated against it. Today, a vaccine is available that protects children against chickenpox.
What is the structure of varicella-zoster virus?
Similar to other herpesvirus capsids, the VZV capsid is composed mainly of four types of protein that are arranged in icosahedral symmetry with a triangulation (T) number of 16, including the major capsid protein (MCP), the small capsid protein (SCP), and the Tri1 and Tri2 proteins that make up the heterotriplex (Fig.
What do chicken pox scabs look like?
The scabs vary in colour from pink and purple to grey. There are also a few spots without scabs, which look like small blisters. These are slightly darker in colour than the surrounding skin. This image shows light brown skin with stage 3 chickenpox spots.
How do you describe shingles rash on a physical exam?
The rash is initially an erythematous, maculopapular rash, but over the next 7-10 days, it progresses to pustules and ulceration, with crusts, scabbing or both. Post-inflammatory hyperpigmentation may develop along the affected dermatome(s) as part of the healing process.
Which describes the virus that causes chickenpox and shingles?
Varicella-zoster virus (VZV) is the cause of chickenpox and herpes zoster (also called shingles).