Disorders of upper respiratory tract, Biology

DISORDERS OF UPPER RESPIRATORY TRACT:

Common Cold:

It is most frequent and most common infection in infants  and children. Common cold corresponds  to  acute nasopharyngitis or influenza syndrome and may include systemic  febrile illness. 

Etiology

It  is usually caused by viruses viz. Andenovirus, rhinovirus, influenza virus, parainfluenza and respiratory  syncytial  virus. 

These are spread by droplet infection. 

Predisposing, Factors 

Chilling, exposure,  sudden  changes of  temperature,  overcrowding, poor sanitation ad  malnutrition predispose  to common cold. 

Pathogenesis 

The viruses,  first invade  the surface ciliated andnon-ciliated  epithelial  cells resulting in congestion and shedding of  the cilia  followed by invasion of deeper epithelial cells. This leads  to denudation of the mucosa and edema of subepithelial  tissue resulting  in congestion. Initially upper respiratory tract cells are affected but as disease  progresses  lower respiratory tract is also  involved. 

Clinical Features

Initially  there  is  irritation  and  feeling ofnasal  congestion - Sneezing - Nasal discharge initially watery and eventually becomes mucoid or purulent - fever and rigor Medical Management - No Antibiotics  are given unless  there  is secondary bacterial infection - Synptomatic treatment is given with analagesics,  decongestants, antihistamines  et 

Posted Date: 10/26/2012 7:53:07 AM | Location : United States







Related Discussions:- Disorders of upper respiratory tract, Assignment Help, Ask Question on Disorders of upper respiratory tract, Get Answer, Expert's Help, Disorders of upper respiratory tract Discussions

Write discussion on Disorders of upper respiratory tract
Your posts are moderated
Related Questions
what does the future look like with trash in the ocean?

EXPLAIN IN DETAILS FEEDING MECHANISM IN MAN.

Sutures are also classified by thread diameter: Thread materials range in diameter from 1 to 10 with the higher number corresponding to the thinner, more delicate thread. In

Define the Swab or Agar - Food Microbiology? Slant Method The method involves sampling with cotton swabs that are transferred directly to slants. Other methods include use of u

Describe about The implant surgeon The implant surgeon should have basic knowledge of the macroscopic and microscopic anatomy of the jaw bones with their associated neurovascul

Encystment – Protozoan Encystment is characteristic of the life cycle of many protozoan. The protozoan secretes a thickened envelope (cyst) around itself and becomes inactive

Define Procedure for Detection of Number of Bacteria in Milk? 1. Place a clean, non-greasy slide over the graph paper. 2. Spread 0.01 ml of the milk over an area of 1 cm2 as

Which of the following statements regarding the separation of DNA fragments using gel electrophoresis is false? A. DNA fragments will migrate towards the positively charged ele

Q. Do all the eukaryotic cells have nucleus and/or only one nucleus? There are eukaryotic cells devoid of a nucleus and others with more than one nucleus. Osteoclasts, the cell

what is the androcium in china rose ..