Chicken Pox
Cards (21)
- Varicella Zoster - It causes chicken pox.
- Chicken pox - Also known as Varicella. Most common in winter and spring
- Blisters - Small and sit on an area of red skin that can be anywhere and they are varying size.
- Giovanni Filipino - Discovered chicken pox during the 15th century in Italy.
- Richard Morton - Gave the name chicken pox.
- William Heberden - Proved that chicken pox is different from small pox.
- Varicella Zoster Virus
- Also known as human herpesvirus 3 (HHV3)
- Varicella Zoster Virus - belongs to the herpesvirus family
- Viral Glycoproteins - the envelope interspersed by spike in varicella zoster virus.
- Chicken pox - primary lesion
- Herpes Zoster - reactivated lesion
- Pathogenesis
- Day 0-3 : Infection of conjunctivae and mucosa of the upper respiratory tract.
- Viral replication in regional lymph nodes.
- Day 4-6 : primary viremia, viral infection in liver, spleen and other organs.
- Day 10-12 : secondary viremia.
- Day 14 : infection of skin and appearance of vesicular rash.
- Transmission of chicken pox
- Inhalation
- Droplets
- Stages
- Incubation period usually 14-17 days.
- Prodromal (1-3 days).
- Vesicles.
- Pustules.
- Scabs.
- Recovery typically 7 days after rash appears.
- Small Blister-like Lesions
- occasionally involve the oral side mucosa chiefly the buccal mucosa, tongue, gums and palate as well as the mucosa of the pharynx.
- Mucosal Lesion
- initially slightly raised vesicles with surrounding erythema, rupture soon after formation and form small eroded ulcers with a red margin.
- Increased Risk of Complications of Chicken Pox:
- Normal Adults
- Immunocompromised
- Pregnant Woman
- Varicella Vaccine
- Contains live varicella virus.
- Side effect of vaccine includes redness and soreness at the site of injection.
- First Dose of Chicken pox vaccine
- 12-15 months of age.
- Second dose of chicken pox vaccine
- 4-6 years of age
- People not been vaccinated earlier
- People 13 years of age and older should get 2 doses at least 28 days apart.