Disorders of upper respiratory tract, Biology


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. 


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. 


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
Define about the Photometry - colorimetry? Photometry is the measurement of the luminous intensity light or the amount of luminous light falling on a surface from such a source

Define the Confusion Stage when Drug effects on food intake? Confusion: Drugs, which impair memory or cause confusion can result in people forgetting to eat. Central nervous sy

The measurement of blood sugar is of prime importance in the diagnosis and monitoring of patients with diabetes. You can refer sub-section 1.5.2 of Unit 1 to review about Glucose T

How Age affects the BMR? The BMR per unit weight also varies with age, being higher in children and lower in the elderly. The loss of FFM with ageing is associated with a decli

Explain in brief about Polymers In comparison to metals and ceramics, polymers are weak and flexible. These are not popular as dental implant materials. Examples of polymeric m

Q. What is Cholesterol? In its free, unesterified form cholesterol is a major component (together with phospolipid) of cell membranes. Its presence helps to stabilize membrane

Explain anterior pituitary gland secretes hormones The anterior pituitary gland secretes hormones that elevate  the blood glucose and therefore antagonize the action of glucose

Explain Exclusion diets Exclusion diets: Specific dietary exclusion becomes a necessity  in  case of  food allergy or food intolerance.  The therapeutic use of  such  diets req

Healthcare provider reporting of influenza activity is mandatory in the United States.

Define Procedure for Measurement of pH? To ensure reliability of the pH readings, you should first calibrate the pH meter. You should adjust the pH meter so that the readings a